Beneficiation method of copper cobalt oxide and copper cobalt sulfide mixed ore

Abstract

A beneficiation method of copper cobalt oxide and copper cobalt sulfide mixed ore comprises the steps that the copper cobalt oxide and copper cobalt sulfide mixed ore is ground and prepared into raw ore pulp, magnetic separation 1 is carried out, and copper cobalt oxide magnetic concentrate 1 and magnetic separation tailings 1 are obtained; after the magnetic separation tailings 1 are subjected to sulphide ore screening, the obtained tailings are subjected to magnetic separation 2, and copper cobalt oxide magnetic separation concentrate 2 and magnetic separation tailings 2 are obtained; the magnetic separation 1 comprises a strong magnetic roughing procedure and a weak magnetic concentration procedure. The method further comprises key parameters in magnetic separation. According to the method disclosed by the invention, most copper oxide cobalt ores which are more difficult to recover by a flotation process are recovered from sulfur-oxygen mixed copper cobalt ores by utilizing the difference of co-associated relationships between magnetic cobalt minerals and copper sulfide as well as copper oxide; the method can replace a traditional copper oxide cobalt ore sulfuration flotation process, and the problems that during copper oxide cobalt ore sulfuration flotation, process regulation and control are difficult, reagent consumption is large, and tailing reagents pollute the environment are solved.

Description

Technical Field

[0001] The invention relates to the field of mixed copper-cobalt ore dressing, and in particular to a method for dressing mixed copper-cobalt oxide and copper-cobalt sulfide ore. Background Art

[0002] Copper has been an indispensable metal in human society since ancient times. Especially in the process of industrialization, copper has good thermal conductivity, electrical conductivity, corrosion resistance, ductility and tensile strength. It is widely used in light industry, electrical industry, national defense industry, construction industry, machinery manufacturing industry and other fields. It ranks second in the consumption of non-ferrous metal materials in China today and is an important strategic reserve resource. Cobalt metal is an important additive in the magnetic material industry. It has a melting point of 1495℃ and a boiling point of 2870℃. It has excellent properties such as ferromagnetism, high temperature resistance and corrosion resistance. It can effectively improve the high temperature resistance and anti-aging effect of magnetic materials in the production process. It is widely used in aerospace, machinery manufacturing, ceramics, electrical and electronic industries and other industrial fields. It is one of the important raw materials for manufacturing cemented carbide, new energy batteries and catalysts.

[0003] According to the data of the United States Geological Survey in 2015, the world's proven copper reserves are about 700 million tons, and the basic cobalt resources are about 25 million tons. Among them, Chile, Peru, Australia and other countries concentrate nearly 74% of copper mineral resources, and Congo (Kinshasa), Australia and Cuba concentrate 68% of the total cobalt mineral resources. In recent years, with the development of economy, science and technology and other fields, my country's demand for copper and cobalt has increased significantly, but due to the constraints of its own resource conditions, the production of copper and cobalt products has grown slowly, the import demand has increased, and the contradiction between supply and demand has become increasingly prominent.

[0004] Congo (DRC) is an important producer of copper and cobalt resources in the world. Its copper reserves are 75 million tons, making it one of the countries with the largest reserves in the world. Its cobalt reserves are 3.6 million tons, accounting for about 50.70% of the world's total reserves, making it the world's largest cobalt producer. Copper mainly exists in the form of copper oxide minerals and copper sulfide minerals, and cobalt mainly exists as a mineral associated with copper. Specifically, cobalt ores include Tonggu pyrolusite, cobalt dolomite, cobalt-containing malachite, sulfide copper diamond, hydrocobaltite, cobalt sulphide, etc. Copper oxide minerals include malachite, chalcocite, cuprite, copper ore, covellite, etc. Copper sulfide ores include chalcocite, azurite, chalcopyrite, etc.

[0005] Sulfur-oxygen mixed copper-cobalt ore refers to an ore containing both sulfide copper-cobalt ore and oxide copper-cobalt ore. In nature, copper-cobalt ore usually coexists with other minerals due to the influence of crustal movement, regional metamorphism, hydrothermal transformation and other factors. In the long-term geological process, sulfur-oxygen mixed copper-cobalt ore with coexistence of sulfide ore and oxide ore is formed. The oxidation rate of sulfur-oxygen mixed copper-cobalt ore usually refers to the proportion of copper and cobalt oxides in the ore; sulfur-oxygen mixed copper-cobalt ore with an oxidation rate of less than 40% is generally considered to have a low oxidation rate, and sulfur-oxygen mixed copper-cobalt ore with an oxidation rate of around 60%±10% is generally considered to have a medium oxidation rate.

[0006] The copper and cobalt elements in some copper-cobalt ores with different oxidation rates are isomorphous in weakly magnetic minerals such as limonite, copper-cobalt pyrolusite, and cobalt dolomite. At present, sulfide flotation is mainly used to treat oxidized copper-cobalt minerals in copper-cobalt mixed ores. However, when the sulfide flotation process is used, a large amount of high-mud, carbonate and other gangue minerals will also consume sulfiding agents and collectors. Especially when the content of oxidized copper-cobalt minerals is low, gangue minerals will become the main body of sulfiding agents and collectors, resulting in a large amount of reagents being adsorbed by gangue minerals and brought into the tailings, which not only causes a large amount of reagent waste, but also causes environmental pollution problems. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a method for beneficiating a mixed copper-cobalt oxide and copper-cobalt sulfide ore with good recovery effect and without using a sulfide flotation process of copper-cobalt oxide ore.

[0008] The technical solution adopted by the present invention to solve the technical problem is as follows: a method for beneficiating a mixed ore of copper-cobalt oxide and copper-cobalt sulfide, comprising:

[0009] Grinding a mixed ore of copper cobalt oxide and copper cobalt sulfide to form an ore pulp, and performing magnetic separation 1 to obtain a copper cobalt oxide magnetic separation concentrate 1 and a magnetic separation tailing 1; after the magnetic separation tailing 1 is screened through the sulfide ore, the obtained tailings are subjected to magnetic separation 2 to obtain a copper cobalt oxide magnetic separation concentrate 2 and a magnetic separation tailing 2;

[0010] The magnetic separation 1 includes a strong magnetic roughing process and a weak magnetic concentration process: the coarse concentrate obtained in the strong magnetic roughing process is fed into the weak magnetic concentration process; the concentrate obtained in the weak magnetic concentration process is the copper-cobalt oxide magnetic separation concentrate 1;

[0011] In the strong magnetic roughing process of the magnetic separation 1, the magnetic field strength is above 0.9T;

[0012] In the weak magnetic separation process of the magnetic separation 1, the magnetic field strength is 0.2-0.7T.

[0013] Preferably, the copper grade of the copper-cobalt oxide and copper-cobalt sulfide mixed ore is 2.5wt%-5wt%, the cobalt grade is 0.2wt%-0.3wt%, and the oxidation rate is 18wt%-60wt%.

[0014] Preferably, the concentration of the raw ore slurry is 30wt%-35wt%.

[0015] Preferably, the copper cobalt oxide and copper cobalt sulfide mixed ore after grinding has a particle size of -0.074 mm accounting for 72wt%-77wt%.

[0016] Preferably, the magnetic separation 1 also includes a strong magnetic fine sweeping process.

[0017] More preferably, the tailings obtained from the weak magnetic concentration process of magnetic separation 1 are fed into the strong magnetic fine separation process of magnetic separation 1.

[0018] More preferably, the concentrate obtained from the strong magnetic concentration step of magnetic separation 1 is returned to the weak magnetic concentration step of magnetic separation 1.

[0019] Preferably, the magnetic separation 1 also includes a strong magnetic rough separation process.

[0020] More preferably, the tailings obtained from the strong magnetic rough separation process of magnetic separation 1 are fed into the strong magnetic rough separation process of magnetic separation 1.

[0021] More preferably, the tailings obtained from the strong magnetic fine scavenging process of magnetic separation 1 are fed into the strong magnetic rough scavenging process of magnetic separation 1.

[0022] More preferably, the concentrate obtained from the strong magnetic roughing separation process of magnetic separation 1 is returned to the strong magnetic roughing separation process of magnetic separation 1.

[0023] More preferably, the tailings obtained in the strong magnetic roughing separation process of magnetic separation 1 are magnetic separation tailings 1.

[0024] Preferably, in the strong magnetic roughing process of the magnetic separation 1, the magnetic field strength is 1.1-1.2T, the pulsation frequency is 12-14Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h.

[0025] Preferably, in the weak magnetic separation process of the magnetic separation 1, the magnetic field strength is 0.4-0.6T, the pulsation frequency is 8-10Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.3m 3 / h.

[0026] Preferably, the strong magnetic fine sweeping process of the magnetic separation 1: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 12-14Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h.

[0027] Preferably, the strong magnetic roughing separation process of the magnetic separation 1: the magnetic field strength is 1.1-1.4T, the pulsation frequency is 12-14Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h.

[0028] Preferably, the magnetic separation 1 adopts a high gradient magnetic separator.

[0029] Preferably, the sulfide ore screening is copper-cobalt sulfide flotation.

[0030] Preferably, before the copper-cobalt sulfide flotation, the pulp concentration of the magnetic separation tailings 1 is adjusted so that the pulp concentration fed into the copper-cobalt sulfide flotation is 35wt%-40wt%.

[0031] Preferably, the collector used in the copper cobalt sulfide flotation is butyl xanthate; the frother used in the copper cobalt sulfide flotation is pine alcohol oil (i.e. 2 # Oil).

[0032] Preferably, the copper-cobalt sulfide flotation includes a roughing process, a scavenging process and a cleaning process.

[0033] More preferably, the coarse concentrate obtained in the roughing step of copper-cobalt sulfide flotation is fed into the concentrating step of copper-cobalt sulfide flotation.

[0034] More preferably, the tailings obtained from the roughing process of the copper-cobalt sulfide flotation are fed into the scavenging process of the copper-cobalt sulfide flotation.

[0035] More preferably, the concentrated ore concentrate obtained in the concentrating step of the copper-cobalt sulfide flotation is a copper-cobalt sulfide flotation concentrate.

[0036] More preferably, the concentrated tailings obtained in the concentrating step of the copper-cobalt sulfide flotation are returned to the roughing step of the copper-cobalt sulfide flotation.

[0037] More preferably, the scavenged concentrate obtained in the scavenging step of the copper-cobalt sulfide flotation is returned to the roughing step of the copper-cobalt sulfide flotation.

[0038] More preferably, the scavenging tailings obtained in the scavenging step of the copper-cobalt sulfide flotation are copper-cobalt sulfide flotation tailings.

[0039] More preferably, in the roughing process and the scavenging process of the copper-cobalt sulfide flotation, the order of adding reagents is: first adding the collector, and then adding the frother.

[0040] More preferably, in the roughing process and the scavenging process of the copper-cobalt sulfide flotation, the collector is added and stirred for 2-3 minutes, and the frother is added and stirred for 1-1.5 minutes.

[0041] More preferably, in the roughing process of the copper-cobalt sulfide flotation, the amount of the collector is 80-120 g / t, and the amount of the frother is 15-30 g / t.

[0042] More preferably, in the scavenging process of the copper-cobalt sulfide flotation, the amount of the collector is 10-80 g / t, and the amount of the frother is 5-20 g / t.

[0043] More preferably, the concentrating step of the copper-cobalt sulfide flotation is blank concentrating.

[0044] More preferably, the scavenging process of the copper-cobalt sulfide flotation comprises two or more scavenging stages:

[0045] The scavenged concentrate obtained in the first stage of scavenging is returned to the roughing process of the copper-cobalt sulfide flotation, and the concentrate obtained in other stages of scavenging is returned to the previous stage of scavenging;

[0046] The scavenging tailings obtained in the last scavenging stage are copper-cobalt sulfide flotation tailings, and the tailings obtained in other scavenging stages enter the next scavenging stage.

[0047] More preferably, the flotation process of copper-cobalt sulfide includes two or more stages of flotation:

[0048] The tailings obtained from the first stage of concentration are returned to the roughing process of the copper-cobalt sulfide flotation, and the tailings obtained from the other stages of concentration are returned to the previous stage of concentration;

[0049] The concentrated ore obtained in the last stage of selection is copper-cobalt sulfide flotation concentrate, and the concentrates obtained in other stages of selection enter the next stage of selection.

[0050] Further preferably, the roughing process of the copper-cobalt sulfide flotation includes one stage of roughing, the scavenging process of the copper-cobalt sulfide flotation includes three stages of scavenging, and the concentrating process of the copper-cobalt sulfide flotation includes four stages of concentrating.

[0051] Further preferably, in the first stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 60-80 g / t, and the amount of the frother is 10-20 g / t.

[0052] Further preferably, in the second stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 30-40 g / t, and the amount of the frother is 5-10 g / t.

[0053] Further preferably, in the third stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 10-20 g / t, and the amount of the frother is 5-10 g / t.

[0054] Preferably, the tailings obtained from the sulfide ore screening are also subjected to drug removal treatment before the magnetic separation 2.

[0055] More preferably, the drug removal treatment includes concentration removal: the tailings obtained by screening the sulfide ore are concentrated to a pulp concentration of 50wt%-55wt%.

[0056] Preferably, before performing the magnetic separation 2, the slurry concentration is adjusted so that the slurry concentration fed into the magnetic separation 2 is 30wt%-35wt%.

[0057] Preferably, the magnetic separation 2 includes a strong magnetic roughing separation process and a strong magnetic sweeping separation process;

[0058] The strong magnetic roughing process of the magnetic separation 2, the roughing tailings obtained are fed into the strong magnetic sweeping process of the magnetic separation 2;

[0059] The concentrate obtained by the strong magnetic roughing process and the strong magnetic sweeping process of the magnetic separation 2 is the copper-cobalt oxide magnetic separation concentrate 2.

[0060] More preferably, in the strong magnetic roughing process of the magnetic separation 2, the magnetic field strength is 1.0-1.1T, the pulsation frequency is 8-12Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h.

[0061] More preferably, in the strong magnetic sweeping process of the magnetic separation 2, the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-12Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.3m 3 / h.

[0062] More preferably, the tailings obtained in the strong magnetic sweeping process of the magnetic separation 2 are magnetic separation tailings 2.

[0063] More preferably, the magnetic separation 2 adopts a high gradient magnetic separator.

[0064] The present invention has the following beneficial effects:

[0065] (1) The present invention utilizes the coexistence of magnetic cobalt minerals with copper sulfide and copper oxide in the ore, the weak magnetism of cobalt minerals, and the magnetic difference between copper cobalt oxide ore and copper cobalt sulfide ore (copper cobalt sulfide ore and copper cobalt oxide ore are both magnetic, but copper cobalt sulfide ore is weaker in magnetism). In magnetic separation 1, a magnetic separation process combining strong and weak magnetism is adopted to recover most of the copper cobalt oxide ore that is more difficult to recover by flotation process from the sulfur-oxygen mixed copper cobalt ore, thereby reducing the overall difficulty of mineral processing;

[0066] (2) Since the magnetic separation 1 has already recovered most of the oxidized copper-cobalt ore in advance, the sulfide copper-cobalt flotation can be carried out using the magnetic separation tailings 1 as raw materials, which can reduce the amount of ore entering the flotation by about 2%-10%, and accordingly, the configuration of the flotation equipment can be reduced by 2-10%; the magnetic separation 1 also reduces the amount of copper-cobalt metal entering the flotation by about 5%-45%, which can reduce the consumption of flotation reagents; the present invention has good economic benefits;

[0067] (3) The amount of oxidized copper-cobalt ore in the magnetic separation tailings 1 is significantly reduced compared to the original ore, which also reduces the interference of oxidized copper-cobalt ore and has a positive effect on improving the taste of sulfide copper-cobalt flotation concentrate products; in some embodiments of the present invention, a flotation effect with a copper grade greater than 60% can be obtained;

[0068] (4) Due to the large amount of ore processed in the magnetic separation process 1, there may be a small amount of copper-cobalt oxide minerals that are not captured by the magnetic separation. By adding a magnetic separation process 2 to the tailings after the copper-cobalt sulfide flotation, this part of the copper-cobalt oxide minerals can be effectively recovered;

[0069] (5) The present invention replaces the traditional sulfide flotation process of copper-cobalt oxide ores by pre-magnetic separation and sulfur tailings magnetic separation processes, while meeting the recovery of valuable metals such as copper and cobalt in the ore, and avoiding the difficult process control, large reagent consumption and environmental pollution caused by tailings reagents during sulfide flotation of copper-cobalt oxide ores.

[0070] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0072] Figure 1 It is a process flow chart of the beneficiation method of copper-cobalt oxide and copper-cobalt sulfide mixed ore in Example 1 of the present invention. DETAILED DESCRIPTION

[0073] In order to make the purpose, scheme and beneficial technology of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments and drawings. It should be pointed out that the embodiments described in this specification are only for explaining the present invention, not for limiting the present invention.

[0074] For simplicity, only some numerical ranges are explicitly disclosed herein. However, any lower limit can be combined with any upper limit to form an unambiguous range; and any lower limit can be combined with other lower limits to form an unambiguous range, and any upper limit can be combined with any other upper limit to form an unambiguous range. In addition, although not explicitly stated, each point or single value between the range endpoints is included in the range. Thus, each point or single value can be combined with any other point or single value as its own lower limit or upper limit or with other lower limits or upper limits to form an unambiguous range.

[0075] In the description of this article, it should be noted that, unless otherwise specified, “above” and “below” are inclusive of the number, and the “multiple” in “one or more” means two or more, and the “multiple” in “one or more” means two or more.

[0076] An embodiment of the present invention provides a method for beneficiating a mixed ore of copper-cobalt oxide and copper-cobalt sulfide, comprising:

[0077] Grinding a mixed ore of copper cobalt oxide and copper cobalt sulfide to form an ore pulp, and performing magnetic separation 1 to obtain a copper cobalt oxide magnetic separation concentrate 1 and a magnetic separation tailing 1; after the magnetic separation tailing 1 is screened through the sulfide ore, the obtained tailings are subjected to magnetic separation 2 to obtain a copper cobalt oxide magnetic separation concentrate 2 and a magnetic separation tailing 2;

[0078] The magnetic separation 1 includes a strong magnetic roughing process and a weak magnetic concentration process: the coarse concentrate obtained in the strong magnetic roughing process is fed into the weak magnetic concentration process; the concentrate obtained in the weak magnetic concentration process is the copper-cobalt oxide magnetic separation concentrate 1;

[0079] In the strong magnetic roughing process of the magnetic separation 1, the magnetic field strength is above 0.9T;

[0080] In the weak magnetic separation process of the magnetic separation 1, the magnetic field strength is 0.2-0.7T.

[0081] The present invention utilizes the associated relationship between copper and cobalt. Since the cobalt-containing minerals have weak magnetism, the copper minerals associated with cobalt can be selected in magnetic separation using the cobalt minerals as magnetic carriers.

[0082] The magnetic separation process 1 combining strong and weak magnetic fields in the embodiment of the present invention can recover copper-cobalt oxide ore from sulfur-oxygen mixed copper-cobalt ore. Both copper-cobalt sulfide ore and copper-cobalt oxide ore in the sulfur-oxygen mixed copper-cobalt ore are magnetic. The existing technology uses magnetic separation processes, which generally separate magnetic and non-magnetic minerals, and cannot achieve the effect of separating copper-cobalt oxide ore from copper-cobalt sulfide ore. Compared with copper-cobalt oxide ore, copper-cobalt sulfide ore is less difficult to beneficiate using common beneficiation methods such as flotation, and the effect is better. Therefore, the copper-cobalt oxide ore in the sulfur-oxygen mixed copper-cobalt ore is selected from the copper-cobalt oxide ore in advance by magnetic separation, which reduces the overall beneficiation difficulty.

[0083] In magnetic separation 2, since the sulfide ore screening has separated the sulfide ore, the existence form of the valuable metals in the slurry has changed from a mixture of sulfide ore and oxide ore to oxide ore being the majority, and there is no need to separate the sulfide ore and oxide ore. Therefore, the remaining copper and cobalt oxide minerals can be successfully recovered by using a more conventional magnetic separation method.

[0084] The ore dressing method provided by the embodiment of the present invention has the following advantages:

[0085] (1) The present invention utilizes the coexistence of magnetic cobalt minerals with copper sulfide and copper oxide in the ore, the weak magnetism of cobalt minerals, and the magnetic difference between copper cobalt oxide ore and copper cobalt sulfide ore (copper cobalt sulfide ore and copper cobalt oxide ore are both magnetic, but copper cobalt sulfide ore is weaker in magnetism). In magnetic separation 1, a magnetic separation process combining strong and weak magnetism is adopted to recover most of the copper cobalt oxide ore that is more difficult to recover by flotation process from the sulfur-oxygen mixed copper cobalt ore, thereby reducing the overall difficulty of mineral processing;

[0086] (2) Since the magnetic separation 1 has already recovered most of the oxidized copper-cobalt ore in advance, the sulfide ore screening using the magnetic separation tailings 1 as raw materials can reduce the amount of ore entering the screening by about 2%-10%, and accordingly, the configuration of the screening equipment can be reduced by 2-10%; the magnetic separation 1 also reduces the amount of copper-cobalt metal entering the screening by about 5%-45%, which can reduce the consumption of the screening agent; the present invention has good economic benefits;

[0087] (3) The amount of oxidized copper-cobalt ore in the magnetic separation tailings 1 is significantly reduced compared to the original ore, which also reduces the interference of oxidized copper-cobalt ore and has a positive effect on improving the quality of the concentrate product obtained by sulfide ore screening. In some embodiments of the present invention, a screening effect with a copper grade greater than 60% can be obtained;

[0088] (4) Due to the large amount of ore processed in the magnetic separation process 1, there may be a small amount of copper-cobalt oxide minerals that are not captured by the magnetic separation. By adding a magnetic separation process 2 to the tailings after the sulfide ore is screened, this part of the copper-cobalt oxide minerals can be effectively recovered;

[0089] (5) The present invention replaces the traditional sulfide flotation process of copper-cobalt oxide ores by pre-magnetic separation and sulfur tailings magnetic separation processes, while meeting the recovery of valuable metals such as copper and cobalt in the ore, and avoiding the difficult process control, large reagent consumption and environmental pollution caused by tailings reagents during sulfide flotation of copper-cobalt oxide ores.

[0090] In the embodiment of the present invention, the copper grade of the copper-cobalt oxide and copper-cobalt sulfide mixed ore is 2.5wt%-5wt%, the cobalt grade is 0.2wt%-0.3wt%, and the oxidation rate is 18wt%-60wt%. For the copper-cobalt oxide and copper-cobalt sulfide mixed ore with medium or low oxidation rate, when sulfide flotation is used, the consumption of sulfiding agent and collector generated by gangue minerals is particularly prominent, and the method of the present invention is particularly suitable.

[0091] In an embodiment of the present invention, the concentration of the raw ore slurry is 30wt%-35wt%.

[0092] In an embodiment of the present invention, the copper cobalt oxide and copper cobalt sulfide mixed ore after grinding has a particle size of -0.074 mm accounting for 72wt%-77wt%.

[0093] In some embodiments of the present invention, no pharmaceutical agent is added during the grinding process.

[0094] In some embodiments of the present invention, clean water is added during the grinding process to participate in the grinding.

[0095] In some embodiments of the present invention, the magnetic separation 1 uses a high gradient magnetic separator. A high gradient magnetic separator is a magnetic separator commonly used in industrial production, and other magnetic separators with similar functions can be used.

[0096] In some embodiments of the present invention, the magnetic separator 1 adopts a vertical ring high gradient magnetic separator. Other magnetic separators with similar functions can be adopted.

[0097] In some embodiments of the present invention, the magnetic separation 1 also includes a strong magnetic fine scanning process.

[0098] In some embodiments of the present invention, the tailings obtained from the weak magnetic concentration process of magnetic separation 1 are fed into the strong magnetic fine separation process of magnetic separation 1.

[0099] In some embodiments of the present invention, the concentrate obtained from the strong magnetic fine separation process of magnetic separation 1 is returned to the weak magnetic concentration process of magnetic separation 1.

[0100] In some embodiments of the present invention, the magnetic separation 1 also includes a strong magnetic rough separation process.

[0101] In some embodiments of the present invention, the tailings obtained from the strong magnetic rough separation process of magnetic separation 1 are fed into the strong magnetic rough separation process of magnetic separation 1.

[0102] In some embodiments of the present invention, the tailings obtained from the strong magnetic fine scavenging process of magnetic separation 1 are fed into the strong magnetic rough scavenging process of magnetic separation 1.

[0103] In some embodiments of the present invention, the concentrate obtained from the strong magnetic roughing separation process of magnetic separation 1 is returned to the strong magnetic roughing separation process of magnetic separation 1.

[0104] In some embodiments of the present invention, the tailings obtained by the strong magnetic roughing separation process of magnetic separation 1 are magnetic separation tailings 1.

[0105] The magnetic separation process 1 which combines strong magnetic roughing separation, weak magnetic concentration, strong magnetic fine scavenging separation and strong magnetic roughing scavenging separation can achieve better separation effect of copper-cobalt oxide ore and copper-cobalt sulfide ore.

[0106] In some embodiments of the present invention, the strong magnetic roughing process of the magnetic separation 1: the magnetic field strength is 1.1-1.2T,

[0107] The pulsation frequency is 12-14Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h.

[0108] In some embodiments of the present invention, the weak magnetic separation process of the magnetic separation 1: the magnetic field strength is 0.4-0.6T, the pulsation frequency is 8-10Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.3m 3 / h.

[0109] In some embodiments of the present invention, the strong magnetic fine sweeping process of the magnetic separation 1: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 12-14Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h.

[0110] In some embodiments of the present invention, the strong magnetic roughing separation process of the magnetic separation 1: the magnetic field strength is 1.1-1.4T, the pulsation frequency is 12-14Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h.

[0111] In some embodiments of the present invention, the sulfide ore screening is copper-cobalt sulfide flotation.

[0112] In some embodiments of the present invention, before the copper-cobalt sulfide flotation, the pulp concentration of the magnetic tailings 1 is adjusted so that the pulp concentration fed to the copper-cobalt sulfide flotation is 35wt%-40wt%. The magnetic tailings 1 are concentrated to a higher concentration before the copper-cobalt sulfide flotation, which is conducive to further improving the recovery rate of copper and cobalt in the flotation stage; at the same time, a part of water can be recovered. Since flotation often requires the use of organic reagents, this technical solution also reduces the burden of water treatment after flotation.

[0113] In some embodiments of the present invention, the collector used in the copper-cobalt sulfide flotation is butyl xanthate; the frother used in the copper-cobalt sulfide flotation is pine alcohol oil (i.e., 2 # Oil).

[0114] In some embodiments of the present invention, the copper-cobalt sulfide flotation includes a roughing process, a scavenging process and a cleaning process.

[0115] In some embodiments of the present invention, the coarse concentrate obtained from the roughing process of the copper-cobalt sulfide flotation is fed into the concentrating process of the copper-cobalt sulfide flotation.

[0116] In some embodiments of the present invention, the tailings obtained from the roughing process of the copper-cobalt sulfide flotation are fed into the scavenging process of the copper-cobalt sulfide flotation.

[0117] In some embodiments of the present invention, the concentrated ore concentrate obtained by the copper-cobalt sulfide flotation concentration step is a copper-cobalt sulfide flotation concentrate.

[0118] In some embodiments of the present invention, the concentrated tailings obtained from the concentrating step of the copper-cobalt sulfide flotation are returned to the roughing step of the copper-cobalt sulfide flotation.

[0119] In some embodiments of the present invention, the scavenged concentrate obtained in the scavenging process of the copper-cobalt sulfide flotation is returned to the roughing process of the copper-cobalt sulfide flotation.

[0120] In some embodiments of the present invention, the scavenging tailings obtained in the scavenging process of the copper-cobalt sulfide flotation are copper-cobalt sulfide flotation tailings.

[0121] In some embodiments of the present invention, in the roughing process and the scavenging process of the copper-cobalt sulfide flotation, the order of adding reagents is: first adding the collector, and then adding the frother.

[0122] In some embodiments of the present invention, in the roughing process and the scavenging process of the copper-cobalt sulfide flotation, the collector is added and stirred for 2-3 minutes, and the frother is added and stirred for 1-1.5 minutes.

[0123] In some embodiments of the present invention, in the roughing process of the copper-cobalt sulfide flotation, the amount of the collector is 80-120 g / t, and the amount of the frother is 15-30 g / t.

[0124] In some embodiments of the present invention, in the scavenging process of the copper-cobalt sulfide flotation, the amount of the collector is 10-80 g / t, and the amount of the frother is 5-20 g / t.

[0125] In some embodiments of the present invention, the concentrating process of copper-cobalt sulfide flotation is blank concentrating.

[0126] In some embodiments of the present invention, the scavenging process of the copper-cobalt sulfide flotation includes two or more scavenging stages:

[0127] The scavenged concentrate obtained in the first stage of scavenging is returned to the roughing process of the copper-cobalt sulfide flotation, and the concentrate obtained in other stages of scavenging is returned to the previous stage of scavenging;

[0128] The scavenging tailings obtained in the last scavenging stage are copper-cobalt sulfide flotation tailings, and the tailings obtained in other scavenging stages enter the next scavenging stage.

[0129] In some embodiments of the present invention, the flotation process of copper-cobalt sulfide includes two or more stages of concentrating:

[0130] The tailings obtained from the first stage of concentration are returned to the roughing process of the copper-cobalt sulfide flotation, and the tailings obtained from the other stages of concentration are returned to the previous stage of concentration;

[0131] The concentrated ore obtained in the last stage of selection is copper-cobalt sulfide flotation concentrate, and the concentrates obtained in other stages of selection enter the next stage of selection.

[0132] In some embodiments of the present invention, the roughing process of the copper-cobalt sulfide flotation includes one stage of roughing, the scavenging process of the copper-cobalt sulfide flotation includes three stages of scavenging, and the concentrating process of the copper-cobalt sulfide flotation includes four stages of concentrating.

[0133] In some embodiments of the present invention, the flotation of copper-cobalt sulfide includes a four-stage concentration process as follows: the concentrated tailings produced by the first stage of concentration are returned to the roughing stage; the tailings produced by the second, third and fourth stages of concentration are returned to the previous stage of concentration in sequence; the concentrates produced by the first, second and third stages of concentration are sequentially entered into the next stage of concentration; the concentrated concentrate produced by the fourth stage of concentration is the copper-cobalt sulfide flotation concentrate. Four-stage concentration can achieve a better flotation effect.

[0134] In some embodiments of the present invention, the copper-cobalt sulfide flotation includes a three-stage scavenging process as follows: the scavenged concentrate obtained in the first stage scavenging is returned to the roughing process, the concentrate obtained in the second stage scavenging is returned to the first stage scavenging, and the concentrate obtained in the third stage scavenging is returned to the second stage scavenging; the tailings obtained in the first stage scavenging enter the second stage scavenging, the tailings obtained in the second stage scavenging enter the third stage scavenging, and the scavenged tailings obtained in the third stage scavenging are copper-cobalt sulfide flotation tailings.

[0135] In some embodiments of the present invention, in the first stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 60-80 g / t, and the amount of the frother is 10-20 g / t.

[0136] In some embodiments of the present invention, in the second stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 30-40 g / t, and the amount of the frother is 5-10 g / t.

[0137] In some embodiments of the present invention, in the third stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 10-20 g / t, and the amount of the frother is 5-10 g / t.

[0138] In some embodiments of the present invention, the tailings obtained by sulfide ore screening are also subjected to drug removal treatment before the magnetic separation 2. Drug removal of the tailings obtained by sulfide ore screening can reduce the adverse effects of the reagents on the magnetic separation 2 and improve the recovery rate of copper and cobalt valuable metals in the magnetic separation 2.

[0139] In some embodiments of the present invention, the drug removal treatment includes concentrated drug removal: the tailings obtained by screening the sulfide ore are concentrated to a pulp concentration of 50wt%-55wt%. This drug removal method can remove the drug remaining on the surface of the copper-cobalt oxide ore, weaken the force between the drug and the fine-particle minerals, and thus eliminate the effect of the drug on the magnetic properties of the copper-cobalt oxide mineral particles.

[0140] In some embodiments of the present invention, the concentration and drug removal is performed using a thickener, and other concentration instruments with similar functions may also be used.

[0141] In some embodiments of the present invention, the return water obtained by the concentration and de-doping is returned to the roughing process of the copper-cobalt sulfide flotation for use. The return water generated by the concentration and de-doping is returned to the copper-cobalt sulfide flotation, which reduces the consumption of copper-cobalt sulfide flotation reagents and also reduces the residue of reagents in the tailings, effectively alleviating the environmental pollution problem.

[0142] In some embodiments of the present invention, before performing the magnetic separation 2, the slurry concentration is adjusted so that the slurry concentration fed to the magnetic separation is 30wt%-35wt%.

[0143] In some embodiments of the present invention, the magnetic separation 2 uses strong magnetic separation with a magnetic field strength of 0.8T or more.

[0144] In magnetic separation 2, since the sulfide ore screening has separated the sulfide ore, the existence form of the valuable metals in the slurry has changed from a mixture of sulfide ore and oxide ore to oxide ore being the majority, and there is no need to separate sulfide ore and oxide ore. Therefore, compared with magnetic separation 1, a simpler magnetic separation method can be used to successfully recover the remaining copper and cobalt oxide minerals.

[0145] The remaining copper-cobalt oxide minerals in the tailings obtained from sulfide ore screening are mainly fine-grained minerals, and strong magnetic separation has a good magnetic separation effect.

[0146] In some embodiments of the present invention, the magnetic separation 2 includes a strong magnetic roughing separation process and a strong magnetic sweeping separation process:

[0147] The strong magnetic roughing process of the magnetic separation 2, the roughing tailings obtained are fed into the strong magnetic sweeping process of the magnetic separation 2;

[0148] The concentrate obtained by the strong magnetic roughing process and the strong magnetic sweeping process of the magnetic separation 2 is the copper-cobalt oxide magnetic separation concentrate 2.

[0149] In some embodiments of the present invention, the tailings obtained by the strong magnetic sweeping process of the magnetic separation 2 are magnetic separation tailings 2.

[0150] In some embodiments of the present invention, the magnetic separation tailings 2 obtained by the strong magnetic sweeping process of the magnetic separation 2 are the final tailings.

[0151] In some embodiments of the present invention, the magnetic separation 2 uses a high gradient magnetic separator. A high gradient magnetic separator is a magnetic separator commonly used in industrial production, and other magnetic separators with similar functions can be used.

[0152] In some embodiments of the present invention, the magnetic separation 2 uses a vertical ring high gradient magnetic separator. Other magnetic separators with similar functions can be used.

[0153] In some embodiments of the present invention, the strong magnetic roughing process of the magnetic separation 2 has a magnetic field strength of 1.0-1.1 T, a pulsation frequency of 8-12 Hz, and a flow rate of the slurry in the magnetic field of 0.3-0.4 m 3 / h.

[0154] In some embodiments of the present invention, the strong magnetic sweeping process of the magnetic separation 2 has a magnetic field strength of 1.1-1.2T, a pulsation frequency of 8-12Hz, and a flow rate of the slurry in the magnetic field of 0.2-0.3m 3 / h.

[0155] In some embodiments of the present invention, the strong magnetic roughing process of the magnetic separation 1 includes a section of strong magnetic roughing; the weak magnetic concentration process of the magnetic separation 1 includes a section of weak magnetic concentration, the strong magnetic fine sweeping process of the magnetic separation 1 includes a section of strong magnetic fine sweeping, and the strong magnetic rough sweeping process of the magnetic separation 1 includes a section of strong magnetic rough sweeping.

[0156] In some embodiments of the present invention, the strong magnetic roughing process of the magnetic separation 2 includes a stage of strong magnetic roughing; the strong magnetic roughing process of the magnetic separation 2 includes a stage of strong magnetic sweeping.

[0157] In some embodiments of the present invention, the strong magnetic roughing process of the magnetic separation 1 includes more than two stages of strong magnetic roughing selection; the weak magnetic concentration process of the magnetic separation 1 includes more than two stages of weak magnetic concentration, the strong magnetic fine sweeping process of the magnetic separation 1 includes more than two stages of strong magnetic fine sweeping, and the strong magnetic rough sweeping process of the magnetic separation 1 includes more than two stages of strong magnetic rough sweeping.

[0158] In some embodiments of the present invention, the strong magnetic roughing process of the magnetic separation 2 includes more than two stages of strong magnetic roughing; the strong magnetic roughing process of the magnetic separation 2 includes more than two stages of strong magnetic sweeping.

[0159] In the embodiment of the present invention, the reason why the tailings obtained by screening the sulfide ore in the magnetic separation 1 and entering the magnetic separation 2 are first de-doped can be explained by the following mechanism:

[0160] Magnetic separation is a separation technology that separates materials based on their magnetic properties. After the particles in the material enter the non-uniform magnetic field, they are affected by magnetic force and competitive force. Particles with strong magnetic properties are affected by greater magnetic force, while particles with weak magnetic properties are affected by less magnetic force. In order to separate the two, the following conditions need to be met:

[0161]

[0162] Where: F m —Magnetic force on strongly magnetic particles, N; —Magnetic force on weakly magnetic particles, N; F c —The sum of all competitive forces opposing the magnetic force, N.

[0163] When mineral particles enter an inhomogeneous magnetic field, the magnetic force they experience is related to the magnetic field characteristics and the properties of the particles themselves, which can be expressed as:

[0164]

[0165] Where: F m —Magnetic force on the particle, N; ρ—density of the particle, kg / m 3 ; μ0—vacuum magnetic permeability, value is 4π×10 - 7 H / A 2 ; k—volume magnetic susceptibility of the particle, dimensionless; R—radius of the particle, m; H—magnetic field intensity, A / m; gradH—magnetic field gradient, A / m 2 ; HgradH—magnetic field force, A 2 / m 3 ;

[0166] However, in actual magnetic separation, the indicator commonly used to evaluate the magnetic force exerted on particles in the magnetic separator is the magnetic force exerted on magnetic particles per unit mass - specific magnetic force:

[0167]

[0168] Where: f m — specific magnetic force, N / kg; m—mass of the particle, kg; χ—specific magnetic susceptibility of the material, m 3 / kg.

[0169] Since the magnetic induction intensity satisfies:

[0170] B=μ0H (4)

[0171] In the formula: B is magnetic induction intensity, T; H is magnetic field intensity, A / m.

[0172] Therefore, the specific magnetic force can be calculated by formula (5):

[0173]

[0174] Where: gradB—magnetic induction gradient, T / m

[0175] From the above formula, it can be seen that the magnitude of the specific magnetic force on the particles in the non-uniform magnetic field depends only on the internal factor: the material specific magnetic susceptibility χ and the external factor: the magnetic field intensity H and the magnetic field gradient gradH (or the magnetic induction intensity B and the magnetic induction gradient gradB). The internal factor is determined by the physical and chemical properties of the particles, and the external factor is determined by the magnetic field characteristics of the magnetic separator. Therefore, the magnetic field intensity H and the magnetic field gradient gradH (or the magnetic induction intensity B and the magnetic induction gradient gradB) are important indicators of the magnetic separation performance of the magnetic separator.

[0176] During the magnetic separation process, particles are affected not only by gravity but also by some competitive forces, among which gravity and fluid drag are the two competitive forces that play the main role in the high gradient magnetic separation process.

[0177] After the mineral particles enter the magnetic separator, during the high gradient magnetic separation process, the effective gravity exerted on the particles in the fluid medium can be expressed by formula (6):

[0178] F g =4 / 3π(ρ-ρ1)R 3 g (6)

[0179] Where: F g —Effective gravity, N; ρ—Density of particles, kg / m 3 ; ρ1—density of fluid medium, kg / m 3 ; R—radius of the particle, m; g—acceleration due to gravity, its value is 9.81 m / s 2 .

[0180] In addition, in the high gradient magnetic separation process, the motion state of the fluid can be regarded as laminar flow, so the fluid drag force on the particles can be expressed by formula (7):

[0181] F d =6πη0R(v p -v f ) (7)

[0182] Where: F d —fluid drag, N; η0—dynamic viscosity of the fluid, Pa·s; R—radius of the particle, m; v p —Particle velocity, m / s; v f —Fluid velocity, m / s.

[0183] From equations (6) and (7), we can see that the effective gravity F acting on the particle is g and fluid drag F d Both are related to the radius R of the mineral particles and are proportional to its cube and first power respectively.

[0184] Therefore, for magnetic minerals such as copper-cobalt oxide ore, the magnetic field strength and magnetic field gradient provided by the magnetic separator make the magnetic mineral particles in the magnetic separator subject to magnetic force in addition to mechanical force. By utilizing the difference in magnetization properties between different particles, the force difference between particles with strong magnetism, particles with weak magnetism and non-magnetic particles is increased, thereby strengthening the difference in their movement trajectories, so that they can be effectively separated after passing through the magnetic separator.

[0185] After copper-cobalt oxide particles with strong magnetism enter the high-gradient magnetic separator, the magnetic force they experience is greater than their competitive force, and the combined force on the particles points to the magnetic medium. The particles approach the magnetic medium and are adsorbed to become the final magnetically separated copper-cobalt oxide concentrate. After copper-cobalt oxide particles with weak magnetism enter the high-gradient magnetic separator, the magnetic force they experience is less than their competitive force, and the combined force on the particles deviates from the magnetic medium. The particles gradually move away from the magnetic medium and flow out of the magnetic separator with the fluid to become magnetically separated ores or tailings. However, in essence, they all use the physical properties of the mineral particles themselves to increase the difference in the forces on different particles by changing the magnetic field characteristics they experience or adding a composite force field, thereby forming an effective separation.

[0186] In the embodiment of the present invention, the coexistence relationship between magnetic cobalt minerals and copper sulfide and copper oxide in the ore, the weak magnetism of cobalt minerals, and the magnetic difference between copper cobalt oxide ore and copper cobalt sulfide ore (copper cobalt sulfide has weaker magnetism than copper cobalt oxide ore) are fully utilized. Cobalt minerals are used as magnetic carriers, and part of the copper cobalt oxide ore in the ore is pre-recovered by magnetic separation 1, which reduces about 2%-10% of the ore amount and 5%-45% of the copper and cobalt metal amount entering the sulfide ore screening. However, there may still be a part of copper cobalt oxide ore with finer particle size, which cannot be recovered by magnetic separation 1 and enters the sulfide ore screening process because the magnetic force it receives is less than its competitiveness; when flotation is used for screening, this part of copper cobalt oxide ore entering the flotation process will be impregnated by the collector and frother added in the sulfide ore flotation process during the sulfide ore flotation process, and the copper cobalt oxide ore after the action of the collector and frother has a strong hydrophobicity. Due to the hydration repulsion between hydrophilic colloids, the hydrophobic force between hydrophobic colloids, and the spatial repulsion between macromolecular compounds, according to the extended DLVO theory, the total energy of the interaction between colloid particles is given by formula (8):

[0187]

[0188] Where: V W V is the van der Waals interaction energy; E is the electrostatic interaction energy; V HR is the hydration interaction repulsion energy; V HA V is the hydrophobic interaction attraction energy; SR is the steric stabilization energy; V MA is the magnetic attraction potential energy, V FA is the fluid dynamics interaction potential energy.

[0189]

[0190] The constant A in formula (9) is the Hamaker constant. The Hamaker constants of particles 1 and 2 in the liquid medium can be obtained according to formula (10):

[0191]

[0192] Where: A 11 and A 22 are the Hamaker constants of mineral particles 1 and 2 in vacuum; A 33 is the Hamaker constant of water medium in vacuum.

[0193]

[0194] Where ψ is the surface potential of the mineral, which can be expressed by the zeta potential ζ, in volts, and ε a represents the absolute dielectric constant of water, which is 6.95×10 -10 C 2 / (J·m); H is in nm, indicating the distance between two particles; k -1 Debye length represents the thickness of the double electrical layer in nm.

[0195] For the electrolyte ratio of 1:1 and the absolute temperature of 298K, k -1 The expression of is shown in formula (12):

[0196]

[0197] Where C represents the molar concentration of the ion volume, and the unit is mol / L.

[0198]

[0199] Where: is the hydrophilic interaction energy constant, which is related to the surface wettability and the h0 position attenuation length.

[0200]

[0201] Where: is the hydrophobic interaction energy constant (mJ / m 2 )

[0202] For hydrophilic systems:

[0203]

[0204] For hydrophobic systems:

[0205]

[0206] During the flotation process, the addition of collectors and frothers changes the physical and chemical properties of the mineral particles, causing changes in the van der Waals force, electrostatic force, hydration interaction repulsion and hydrophobic interaction attraction between the copper-cobalt oxide ore particles. The total interaction force between the mineral particles is superimposed under the influence of the reagents.

[0207] The collector and frother added in the flotation process of sulfide ore will remain in the tailings, so that the surface of the mineral particles in the tailings still has good hydrophobicity and is not easy to agglomerate. After these minerals enter the magnetic separator, because the mineral particles are fine, the magnetic field force and magnetic field gradient of the external magnetic field are not enough to overcome the total interaction force and fluid drag between fine-grained minerals, so they are not easy to adhere to the surface of the magnetic medium in the magnetic separation stage. The reagents remaining on the surface of the copper-cobalt oxide ore can be removed through the de-drug process, weakening the force between the reagents and the fine-grained minerals, thereby eliminating the influence of the reagents on the magnetic properties of the copper-cobalt oxide mineral particles, so that they can be effectively captured by the magnetic medium in the high-gradient magnetic field, thereby improving the recovery effect of magnetic separation on this part of the copper-cobalt oxide ore.

[0208] Example

[0209] The following examples describe the disclosure of the present invention in more detail, and these examples are intended for illustrative purposes only, as it will be apparent to those skilled in the art that various modifications and variations will be made within the scope of the disclosure of the present invention. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples are by weight. Unless otherwise stated, all reagents used in the examples are available through conventional commercial sources or are synthesized according to conventional methods and can be used directly without further processing. Unless otherwise stated, the instruments used in the examples are available through conventional commercial sources.

[0210] Embodiment 1:

[0211] A sulfur-oxygen mixed copper-cobalt ore in the Democratic Republic of the Congo is a typical difficult-to-process copper-cobalt mixed ore. Through process mineralogical analysis, valuable minerals mainly exist in the form of chalcocite, malachite and hydrocobaltite, and copper and cobalt minerals coexist closely. Through detection and analysis, the original ore contains about 3.5% copper, about 0.21% cobalt, and the copper oxidation rate is 19.13%.

[0212] The process flow chart of this embodiment is as follows Figure 1 The ore dressing method provided in this embodiment is carried out according to the following steps:

[0213] (1) Grinding: The copper-cobalt mixed ore is ground. The grinding water is clean water plus concentrated return water of magnetic separation tailings 1. No reagents are added during the grinding process. The particle size content of the ore is 76.87% after the fineness is -0.074 mm. The ore pulp concentration is 30.11%.

[0214] (2) Magnetic separation 1: The ore pulp obtained by grinding is subjected to one strong magnetic roughing separation, one weak magnetic concentrating separation, one strong magnetic fine sweeping separation and one strong magnetic roughing sweeping separation using a vertical ring high gradient magnetic separator;

[0215] The detailed process of magnetic separation 1 is as follows:

[0216] The magnetic field strength of the strong magnetic roughing is 1.2T, the pulsation frequency is 12Hz, and the flow rate of the slurry in the magnetic field is 0.3m 3 / h, the concentrate obtained is fed into the weak magnetic concentration process, and the tailings obtained is fed into the strong magnetic rough sweeping process;

[0217] The magnetic field strength of weak magnetic concentration is 0.6T, the pulsation frequency is 10Hz, and the flow rate of the slurry in the magnetic field is 0.2m 3 / h, the concentrate obtained is copper-cobalt oxide magnetic separation concentrate 1, and the tailings obtained are fed into the strong magnetic separation process;

[0218] The magnetic field strength of the strong magnetic fine sweeping is 1.2T, the pulsation frequency is 14Hz, and the flow rate of the slurry in the magnetic field is 0.3m 3 / h, the concentrate is returned to the weak magnetic concentration process, and the tailings are fed to the strong magnetic rough sweeping process;

[0219] The magnetic field strength of the strong magnetic roughing separation is 1.4T, the pulsation frequency is 14Hz, and the flow rate of the slurry in the magnetic field is 0.3m 3 / h, the obtained concentrate is returned to the strong magnetic roughing process, and the obtained tailings are magnetic separation tailings 1.

[0220] (3) Copper-cobalt sulfide flotation:

[0221] a. Roughing: Add 120 g / t of collector (butyl xanthate) to the magnetic separation tailings 1 concentrated to a pulp concentration of 35.61%, stir for 2 min, add 30 g / t of frother (pine oil), stir for 1 min, and then aerate and float to obtain a copper-cobalt sulfide roughing concentrate and a copper-cobalt sulfide roughing tailings;

[0222] b. Scavenging 1: add 80g / t of collector (butyl xanthate) to the copper-cobalt sulfide roughing tailings, stir for 2min, then add 20g / t of frother (pine oil), stir for 1min, then aerate and float to obtain copper-cobalt sulfide scavenging concentrate 1 and copper-cobalt sulfide scavenging tailings 1. The copper-cobalt sulfide scavenging concentrate 1 is returned to the roughing, and the copper-cobalt sulfide scavenging tailings 1 enters scavenging 2;

[0223] c. Scavenging 2: Add 40 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailings 1, stir for 2 min, then add 10 g / t of frother (pine oil), stir for 1 min, then aerate and float to obtain copper-cobalt sulfide scavenging concentrate 2 and copper-cobalt sulfide scavenging tailings 2. The copper-cobalt sulfide scavenging concentrate 2 is returned to scavenging 1, and the copper-cobalt sulfide scavenging tailings 2 enters scavenging 3;

[0224] d. Scavenging 3: Add 20 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailings 2, stir for 2 min, add 10 g / t of frother (pine oil), stir for 1 min, and then aerate and float to obtain copper-cobalt sulfide scavenging concentrate 3 and copper-cobalt sulfide scavenging tailings 3. The copper-cobalt sulfide scavenging concentrate 3 is returned to scavenging 2, and the copper-cobalt sulfide scavenging tailings 3 are copper-cobalt sulfide flotation tailings;

[0225] e. Selection: Select four blank sections;

[0226] The copper-cobalt sulfide rougher concentrate is subjected to the first stage of concentration to obtain the copper-cobalt sulfide concentrated concentrate 1 and the copper-cobalt sulfide concentrated tailings 1; the copper-cobalt sulfide concentrated tailings 1 are returned to the copper-cobalt sulfide rougher concentration process;

[0227] The copper-cobalt sulfide concentrated ore 1 is subjected to a second stage of concentration to obtain a copper-cobalt sulfide concentrated ore 2 and a copper-cobalt sulfide concentrated tailings 2; the copper-cobalt sulfide concentrated tailings 2 are returned to the first stage of concentration process;

[0228] The copper-cobalt sulfide concentrated ore 2 is subjected to a third stage of concentration to obtain a copper-cobalt sulfide concentrated ore 3 and a copper-cobalt sulfide concentrated tailings 3; the copper-cobalt sulfide concentrated tailings 3 are returned to the second stage of concentration process;

[0229] The copper-cobalt sulfide concentrated concentrate 3 is subjected to the fourth stage of concentration to obtain the copper-cobalt sulfide concentrated concentrate 4 (i.e., the copper-cobalt sulfide flotation concentrate) and the copper-cobalt sulfide concentrated tailings 4, and the copper-cobalt sulfide concentrated tailings 4 are returned to the third stage of the concentration process.

[0230] (4) Drug removal: The copper-cobalt sulfide flotation tailings obtained in step (3) are concentrated and drug removed: a thickener is used to concentrate the pulp to a concentration of 54.2 wt%.

[0231] (5) Magnetic separation 2: The ore pulp after dedoping was diluted to a concentration of 34.43 wt%, and a high-intensity magnetic roughing separation and a high-intensity magnetic sweeping separation were performed using a vertical ring high-gradient magnetic separator;

[0232] The detailed process of magnetic separation 2 is as follows:

[0233] The magnetic field strength of the strong magnetic roughing is 1.1T, the pulsation frequency is 12Hz, and the flow rate of the slurry in the magnetic field is 0.3m 3 / h, the obtained tailings are fed into the strong magnetic sweeping process;

[0234] The magnetic field strength of the strong magnetic sweep is 1.2T, the pulsation frequency is 12Hz, and the flow rate of the slurry in the magnetic field is 0.2m 3 / h;

[0235] The concentrates obtained by the strong magnetic roughing and strong magnetic scavenging are combined to form the copper-cobalt oxide magnetic separation concentrate 2, and the tailings obtained by the strong magnetic scavenging are the magnetic separation tailings 2 (the final tailings in this embodiment).

[0236] The copper oxide contents in the magnetic concentrate 1 and the magnetic concentrate 2 obtained in Example 1 were measured respectively, and the results showed that the copper oxide content in the magnetic concentrate 1 was 10.54%, accounting for 96.96% of the total copper content, and the copper oxide content in the magnetic concentrate 2 was 2.99%, accounting for 97.08% of the total copper content. It is proved that the magnetic concentrate 1 product and the magnetic concentrate 2 product obtained by magnetic separation in Example 1 are both copper-cobalt oxide ores.

[0237] The sulfur-oxygen copper-cobalt mixed ore was treated by the combined magnetic-flotation-magnetic method of first magnetic, then floatation and then magnetic again. Typical test results are shown in Table 1.

[0238] Table 1 Magnetic-flotation-magnetic separation test index of a sulfur-oxygen copper-cobalt ore in Congo (DRC)

[0239]

[0240] From the test results in Table 1, it can be seen that the copper recovery rate in the total concentrate is more than 90%, and the cobalt recovery rate is more than 60%, and the whole process has a good recovery effect. By comparing the recovery rates of the copper-cobalt oxide magnetic separation concentrate 1 and the copper-cobalt oxide magnetic separation concentrate 2, it can be seen that most of the copper-cobalt oxide ore has been selected into the copper-cobalt oxide magnetic separation concentrate 1 through magnetic separation 1, indicating that magnetic separation 1 has a good recovery effect, reduces the oxide from entering the copper-cobalt sulfide flotation, and the obtained copper-cobalt sulfide flotation concentrate has a high grade, and can obtain a flotation effect with a copper grade greater than 60%.

[0241] Embodiment 2:

[0242] A sulfur-oxygen mixed copper-cobalt ore in the Democratic Republic of the Congo is a typical difficult-to-process copper-cobalt mixed ore. Through process mineralogical analysis, valuable minerals mainly exist in the form of chalcocite, malachite and hydrocobaltite, and copper and cobalt minerals coexist closely. Through detection and analysis, the original ore contains about 3.1% copper, about 0.23% cobalt, and the copper oxidation rate is 32.46%.

[0243] The ore dressing method provided in this embodiment is carried out according to the following steps:

[0244] (1) Grinding: The copper-cobalt mixed ore is ground with clean water, and no reagents are added during the grinding process; the particle size content of -0.074 mm is 74.32%; the slurry concentration is 33.33%.

[0245] (2) Magnetic separation 1: The ore pulp obtained by grinding is subjected to one strong magnetic roughing separation, one weak magnetic cleaning, one strong magnetic fine scavenging separation and one strong magnetic roughing scavenging separation using a vertical ring high gradient magnetic separator.

[0246] The detailed process of magnetic separation 1 is as follows:

[0247] The magnetic field strength of the strong magnetic roughing is 1.15T, the pulsation frequency is 13Hz, and the flow rate of the slurry in the magnetic field is 0.35m3 / h, the concentrate obtained is fed into the weak magnetic concentration process, and the tailings obtained is fed into the strong magnetic rough sweeping process;

[0248] The magnetic field strength of weak magnetic concentration is 0.5T, the pulsation frequency is 9Hz, and the flow rate of the slurry in the magnetic field is 0.25m 3 / h, the concentrate obtained is copper-cobalt oxide magnetic separation concentrate 1, and the tailings obtained are fed into the strong magnetic separation process;

[0249] The magnetic field strength of the strong magnetic fine sweeping is 1.15T, the pulsation frequency is 13Hz, and the flow rate of the slurry in the magnetic field is 0.35m 3 / h, the concentrate is returned to the weak magnetic concentration process, and the tailings are fed to the strong magnetic rough sweeping process;

[0250] The magnetic field strength of the strong magnetic roughing separation is 1.3T, the pulsation frequency is 13Hz, and the flow rate of the slurry in the magnetic field is 0.35m 3 / h, the obtained concentrate is returned to the strong magnetic roughing process, and the obtained tailings are magnetic separation tailings 1.

[0251] (3) Copper-cobalt sulfide flotation:

[0252] a. Roughing: Add 100 g / t of collector (butyl xanthate) to the magnetic separation tailings 1 concentrated to a pulp concentration of 36.67%, stir for 2 min, add 25 g / t of frother (pine oil), stir for 1 min, and then aerate and float to obtain a copper-cobalt sulfide roughing concentrate and a copper-cobalt sulfide roughing tailings;

[0253] b. Scavenging 1: add 70g / t of collector (butyl xanthate) to the copper-cobalt sulfide roughing tailings, stir for 2min, then add 15g / t of frother (pine oil), stir for 1min, then aerate and float to obtain copper-cobalt sulfide scavenging concentrate 1 and copper-cobalt sulfide scavenging tailings 1. The copper-cobalt sulfide scavenging concentrate 1 is returned to the roughing, and the copper-cobalt sulfide scavenging tailings 1 enters scavenging 2;

[0254] c. Scavenging 2: add 35 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailings 1, stir for 2 min, add 10 g / t of frother (pine oil), stir for 1 min, and then perform aeration flotation to obtain copper-cobalt sulfide scavenging concentrate 2 and copper-cobalt sulfide scavenging tailings 2. The copper-cobalt sulfide scavenging concentrate 2 is returned to scavenging 1, and the copper-cobalt sulfide scavenging tailings 2 enters scavenging 3;

[0255] d. Scavenging 3: Add 20 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailings 2, stir for 2 min, add 5 g / t of frother (pine oil), stir for 1 min, and then aerate and float to obtain copper-cobalt sulfide scavenging concentrate 3 and copper-cobalt sulfide scavenging tailings 3. The copper-cobalt sulfide scavenging concentrate 3 is returned to scavenging 2, and the copper-cobalt sulfide scavenging tailings 3 are copper-cobalt sulfide flotation tailings;

[0256] e. Selection: Select four blank sections;

[0257] The copper-cobalt sulfide rougher concentrate is subjected to the first stage of concentration to obtain the copper-cobalt sulfide concentrated concentrate 1 and the copper-cobalt sulfide concentrated tailings 1; the copper-cobalt sulfide concentrated tailings 1 are returned to the copper-cobalt sulfide rougher concentration process;

[0258] The copper-cobalt sulfide concentrated ore 1 is subjected to a second stage of concentration to obtain a copper-cobalt sulfide concentrated ore 2 and a copper-cobalt sulfide concentrated tailings 2; the copper-cobalt sulfide concentrated tailings 2 are returned to the first stage of concentration process;

[0259] The copper-cobalt sulfide concentrated ore 2 is subjected to a third stage of concentration to obtain a copper-cobalt sulfide concentrated ore 3 and a copper-cobalt sulfide concentrated tailings 3; the copper-cobalt sulfide concentrated tailings 3 are returned to the second stage of concentration process;

[0260] The copper-cobalt sulfide concentrated concentrate 3 is subjected to the fourth stage of concentration to obtain the copper-cobalt sulfide concentrated concentrate 4 (i.e., the copper-cobalt sulfide flotation concentrate) and the copper-cobalt sulfide concentrated tailings 4, and the copper-cobalt sulfide concentrated tailings 4 are returned to the third stage of the concentration process.

[0261] (4) Drug removal: The copper-cobalt sulfide flotation tailings obtained in step (3) are concentrated and drug removed: a thickener is used to concentrate the pulp to a concentration of 53.02 wt%.

[0262] (5) Magnetic separation 2: The ore pulp after dedoping was diluted to a concentration of 33.33 wt%, and a high-intensity magnetic roughing separation and a high-intensity magnetic sweeping separation were performed using a vertical ring high-gradient magnetic separator;

[0263] The detailed process of magnetic separation 2 is as follows:

[0264] The magnetic field strength of the strong magnetic roughing is 1.1T, the pulsation frequency is 10Hz, and the flow rate of the slurry in the magnetic field is 0.35m 3 / h, the obtained tailings are fed into the strong magnetic sweeping process;

[0265] The magnetic field strength of the strong magnetic sweep is 1.1T, the pulsation frequency is 10Hz, and the flow rate of the slurry in the magnetic field is 0.25m 3 / h;

[0266] The concentrates obtained by the strong magnetic roughing and strong magnetic scavenging are combined to form the copper-cobalt oxide magnetic separation concentrate 2, and the tailings obtained by the strong magnetic scavenging are the magnetic separation tailings 2 (the final tailings in this embodiment).

[0267] The copper oxide content in the magnetic concentrate 1 and the magnetic concentrate 2 obtained in Example 2 was measured respectively, and the results showed that the copper oxide content in the magnetic concentrate 1 was 12.45%, accounting for 96.14% of the total copper content, and the copper oxide content in the magnetic concentrate 2 was 3.18%, accounting for 97.55% of the total copper content. It is proved that the magnetic concentrate 1 product and the magnetic concentrate 2 product obtained by magnetic separation in Example 2 are both copper-cobalt oxide ores.

[0268] The sulfide-oxygen copper-cobalt mixed ore was treated by the combined magnetic levitation method of first magnetization and then levitation. Typical test results are shown in Table 2.

[0269] Table 2 Magnetic-flotation-magnetic separation test index 2 of a sulfur-oxygen copper-cobalt ore in Congo (DRC)

[0270]

[0271] From the test results in Table 2, it can be seen that the copper recovery rate in the total concentrate is more than 90%, and the cobalt recovery rate is more than 60%, and the whole process has a good recovery effect. By comparing the recovery rates of the copper-cobalt oxide magnetic separation concentrate 1 and the copper-cobalt oxide magnetic separation concentrate 2, it can be seen that most of the copper-cobalt oxide ore has been selected into the copper-cobalt oxide magnetic separation concentrate 1 through magnetic separation 1, indicating that magnetic separation 1 has a good recovery effect, reduces the oxide from entering the copper-cobalt sulfide flotation, and the obtained copper-cobalt sulfide flotation concentrate has a high grade, and can obtain a flotation effect with a copper grade greater than 60%.

[0272] Embodiment 3:

[0273] A sulfur-oxygen mixed copper-cobalt ore in the Democratic Republic of the Congo is a typical difficult-to-process copper-cobalt mixed ore. Through process mineralogical analysis, valuable minerals mainly exist in the form of chalcocite, malachite and hydrocobaltite, and copper and cobalt minerals coexist closely. Through detection and analysis, the original ore contains about 2.9% copper, about 0.29% cobalt, and the copper oxidation rate is 58.75%.

[0274] The ore dressing method provided in this embodiment is carried out according to the following steps:

[0275] (1) Grinding: The copper-cobalt mixed ore is ground with clean water, and no reagents are added during the grinding process; the particle size content of -0.074 mm is 74.32%; the slurry concentration is 33.33%.

[0276] (2) Magnetic separation 1: The ore pulp obtained by grinding is subjected to one strong magnetic roughing separation, one weak magnetic concentrating separation, one strong magnetic fine sweeping separation and one strong magnetic roughing sweeping separation using a vertical ring high gradient magnetic separator;

[0277] The detailed process of magnetic separation 1 is as follows:

[0278] The magnetic field strength of the strong magnetic roughing is 1.1T, the pulsation frequency is 12Hz, and the flow rate of the slurry in the magnetic field is 0.4m 3 / h, the concentrate obtained is fed into the weak magnetic concentration process, and the tailings obtained is fed into the strong magnetic rough sweeping process;

[0279] The magnetic field strength of weak magnetic concentration is 0.4T, the pulsation frequency is 8Hz, and the flow rate of the slurry in the magnetic field is 0.3m 3 / h, the concentrate obtained is copper-cobalt oxide magnetic separation concentrate 1, and the tailings obtained are fed into the strong magnetic separation process;

[0280] The magnetic field strength of the strong magnetic fine sweeping is 1.1T, the pulsation frequency is 12Hz, and the flow rate of the slurry in the magnetic field is 0.4m 3 / h, the concentrate is returned to the weak magnetic concentration process, and the tailings are fed to the strong magnetic rough sweeping process;

[0281] The magnetic field strength of the strong magnetic roughing separation is 1.2T, the pulsation frequency is 12Hz, and the flow rate of the slurry in the magnetic field is 0.4m 3 / h, the obtained concentrate is returned to the strong magnetic roughing process, and the obtained tailings are magnetic separation tailings 1.

[0282] (3) Copper-cobalt sulfide flotation:

[0283] a. Roughing: Add 80 g / t of collector (butyl xanthate) to the magnetic tailings 1 concentrated to a pulp concentration of 39.82%, stir for 2 min, add 20 g / t of frother (pine oil), stir for 1 min, and then aerate and float to obtain a rough copper-cobalt sulfide concentrate;

[0284] b. Scavenging 1: add 60g / t of collector (butyl xanthate) to the copper-cobalt sulfide roughing tailings, stir for 2min, then add 10g / t of frother (pine oil), stir for 1min, then aerate and float to obtain copper-cobalt sulfide scavenging concentrate 1 and copper-cobalt sulfide scavenging tailings 1. The copper-cobalt sulfide scavenging concentrate 1 is returned to the roughing, and the copper-cobalt sulfide scavenging tailings 1 enters scavenging 2;

[0285] c. Scavenging 2: add 30 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailings 1, stir for 2 min, add 7.5 g / t of frother (pine oil), stir for 1 min, and then aerate and float to obtain copper-cobalt sulfide scavenging concentrate 2 and copper-cobalt sulfide scavenging tailings 2. The copper-cobalt sulfide scavenging concentrate 2 is returned to scavenging 1, and the copper-cobalt sulfide scavenging tailings 2 enters scavenging 3;

[0286] d. Scavenging 3: Add 15 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailings 2, stir for 2 min, add 5 g / t of frother (pine oil), stir for 1 min, and then aerate and float to obtain copper-cobalt sulfide scavenging concentrate 3 and copper-cobalt sulfide scavenging tailings 3. The copper-cobalt sulfide scavenging concentrate 3 is returned to scavenging 2, and the copper-cobalt sulfide scavenging tailings 3 are copper-cobalt sulfide flotation tailings;

[0287] e. Selection: Select four blank sections;

[0288] The copper-cobalt sulfide rougher concentrate is subjected to the first stage of concentration to obtain the copper-cobalt sulfide concentrated concentrate 1 and the copper-cobalt sulfide concentrated tailings 1; the copper-cobalt sulfide concentrated tailings 1 are returned to the copper-cobalt sulfide rougher concentration process;

[0289] The copper-cobalt sulfide concentrated ore 1 is subjected to a second stage of concentration to obtain a copper-cobalt sulfide concentrated ore 2 and a copper-cobalt sulfide concentrated tailings 2; the copper-cobalt sulfide concentrated tailings 2 are returned to the first stage of concentration process;

[0290] The copper-cobalt sulfide concentrated ore 2 is subjected to a third stage of concentration to obtain a copper-cobalt sulfide concentrated ore 3 and a copper-cobalt sulfide concentrated tailings 3; the copper-cobalt sulfide concentrated tailings 3 are returned to the second stage of concentration process;

[0291] The copper-cobalt sulfide concentrated concentrate 3 is subjected to the fourth stage of concentration to obtain the copper-cobalt sulfide concentrated concentrate 4 (i.e., the copper-cobalt sulfide flotation concentrate) and the copper-cobalt sulfide concentrated tailings 4, and the copper-cobalt sulfide concentrated tailings 4 are returned to the third stage of the concentration process.

[0292] (4) Drug removal: The copper-cobalt sulfide flotation tailings obtained in step (3) are concentrated and drug removed: a thickener is used to concentrate the pulp to a concentration of 50.58 wt%.

[0293] (5) Magnetic separation 2: The ore pulp after dedoping was diluted to a concentration of 31.01 wt%, and a high-intensity magnetic roughing separation and a high-intensity magnetic sweeping separation were performed using a vertical ring high-gradient magnetic separator;

[0294] The detailed process of magnetic separation 2 is as follows:

[0295] The magnetic field strength of the strong magnetic roughing is 1.0T, the pulsation frequency is 8Hz, and the flow rate of the slurry in the magnetic field is 0.4m 3 / h, the obtained tailings are fed into the strong magnetic sweeping process;

[0296] The magnetic field strength of the strong magnetic sweep is 1.1T, the pulsation frequency is 8Hz, and the flow rate of the slurry in the magnetic field is 0.3m 3 / h;

[0297] The concentrates obtained by the strong magnetic roughing and strong magnetic scavenging are combined to form the copper-cobalt oxide magnetic separation concentrate 2, and the tailings obtained by the strong magnetic scavenging are the magnetic separation tailings 2 (the final tailings in this embodiment).

[0298] The copper oxide content in the magnetic concentrate 1 and the magnetic concentrate 2 obtained in Example 3 was measured respectively, and the results showed that the copper oxide content in the magnetic concentrate 1 was 13.22%, accounting for 97.49% of the total copper content, and the copper oxide content in the magnetic concentrate 2 was 3.37%, accounting for 98.83% of the total copper content. It is proved that the magnetic concentrate 1 product and the magnetic concentrate 2 product obtained by magnetic separation in Example 2 are both copper-cobalt oxide ores.

[0299] The sulfur-oxygen copper-cobalt mixed ore was treated by the magnetic-flotation-magnetic combined method of first magnetic, then float and then magnetic again. Typical test results are shown in Table 3.

[0300] Table 3 Magnetic-flotation-magnetic separation test index of a sulfur-oxygen copper-cobalt ore in Congo (DRC)

[0301]

[0302] From the test results in Table 3, it can be seen that the copper recovery rate in the total concentrate is more than 85%, and the cobalt recovery rate is more than 65%, and the whole process has a good recovery effect. By comparing the recovery rates of the copper-cobalt oxide magnetic separation concentrate 1 and the copper-cobalt oxide magnetic separation concentrate 2, it can be seen that most of the copper-cobalt oxide ore has been selected into the copper-cobalt oxide magnetic separation concentrate 1 through magnetic separation 1, indicating that magnetic separation 1 has a good recovery effect, reduces the oxide from entering the copper-cobalt sulfide flotation, and the obtained copper-cobalt sulfide flotation concentrate has a high grade, and can obtain a flotation effect with a copper grade greater than 60%.

[0303] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for beneficiating a mixed ore of copper-cobalt oxide and copper-cobalt sulfide, characterized in that: include: Grinding a mixed ore of copper cobalt oxide and copper cobalt sulfide to form an ore pulp, and performing magnetic separation 1 to obtain a copper cobalt oxide magnetic separation concentrate 1 and a magnetic separation tailing 1; after the magnetic separation tailing 1 is screened through the sulfide ore, the obtained tailings are subjected to magnetic separation 2 to obtain a copper cobalt oxide magnetic separation concentrate 2 and a magnetic separation tailing 2; The magnetic separation 1 includes a strong magnetic roughing process and a weak magnetic concentration process: the coarse concentrate obtained in the strong magnetic roughing process is fed into the weak magnetic concentration process; the concentrate obtained in the weak magnetic concentration process is the copper-cobalt oxide magnetic separation concentrate 1; In the strong magnetic roughing process of the magnetic separation 1, the magnetic field strength is above 0.9T; In the weak magnetic separation process of the magnetic separation 1, the magnetic field strength is 0.2-0.7T.

2. The beneficiation method of copper-cobalt oxide and copper-cobalt sulfide mixed ore according to claim 1, characterized in that: The copper grade of the copper-cobalt oxide and copper-cobalt sulfide mixed ore is 2.5wt%-5wt%, the cobalt grade is 0.2wt%-0.3wt%, and the oxidation rate is 18wt%-60wt%; the concentration of the raw ore slurry is 30wt%-35wt%; the fineness of the product of the copper-cobalt oxide and copper-cobalt sulfide mixed ore after grinding is 72wt%-77wt% of the particle size of -0.074mm; The magnetic separation 1 also includes a strong magnetic fine sweeping process; the tailings obtained from the weak magnetic concentrating process of magnetic separation 1 are fed into the strong magnetic fine sweeping process of magnetic separation 1; the concentrate obtained from the strong magnetic fine sweeping process of magnetic separation 1 is returned to the weak magnetic concentrating process of magnetic separation 1; The magnetic separation 1 also includes a strong magnetic roughing separation process; the tailings obtained from the strong magnetic roughing separation process of magnetic separation 1 are fed into the strong magnetic roughing separation process of magnetic separation 1; the tailings obtained from the strong magnetic fine sweeping separation process of magnetic separation 1 are fed into the strong magnetic roughing separation process of magnetic separation 1; the concentrate obtained from the strong magnetic roughing separation process of magnetic separation 1 is returned to the strong magnetic roughing separation process of magnetic separation 1; the tailings obtained from the strong magnetic roughing separation process of magnetic separation 1 are magnetic separation tailings 1; The strong magnetic roughing process of the magnetic separation 1: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 12-14Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h; The weak magnetic separation process of the magnetic separation 1: the magnetic field strength is 0.4-0.6T, the pulsation frequency is 8-10Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.3m 3 / h; The strong magnetic fine sweeping process of the magnetic separation 1: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 12-14Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h; The strong magnetic rough sweeping process of the magnetic separation 1: the magnetic field strength is 1.1-1.4T, the pulsation frequency is 12-14Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h; The magnetic separation 1 adopts a high gradient magnetic separator.

3. The beneficiation method of copper-cobalt oxide and copper-cobalt sulfide mixed ore according to claim 1 or 2, characterized in that: The sulfide ore screening is copper-cobalt sulfide flotation; Before the copper-cobalt sulfide flotation, the pulp concentration of the magnetic separation tailings 1 is adjusted so that the pulp concentration fed into the copper-cobalt sulfide flotation is 35wt%-40wt%; The collector used in the copper-cobalt sulfide flotation is butyl xanthate; the frother used in the copper-cobalt sulfide flotation is pine oil; The copper-cobalt sulfide flotation comprises a roughing process, a scavenging process and a cleaning process; The coarse concentrate obtained in the roughing process of copper-cobalt sulfide flotation is fed into the concentrating process of copper-cobalt sulfide flotation; The tailings obtained from the roughing process of copper-cobalt sulfide flotation are fed into the scavenging process of copper-cobalt sulfide flotation; The concentrated ore obtained by the concentrating step of the copper-cobalt sulfide flotation is a copper-cobalt sulfide flotation concentrate; The concentrated tailings obtained in the concentrating step of the copper-cobalt sulfide flotation are returned to the roughing step of the copper-cobalt sulfide flotation; The scavenged concentrate obtained in the scavenging process of the copper-cobalt sulfide flotation is returned to the roughing process of the copper-cobalt sulfide flotation; The scavenging tailings obtained in the scavenging process of the copper-cobalt sulfide flotation are copper-cobalt sulfide flotation tailings.

4. The beneficiation method of copper-cobalt oxide and copper-cobalt sulfide mixed ore according to claim 3, characterized in that: In the roughing process and scavenging process of the copper-cobalt sulfide flotation, the order of adding reagents is: first add the collector, then add the frother; In the roughing process and scavenging process of the copper-cobalt sulfide flotation, stirring is performed for 2-3 minutes after adding the collector, and stirring is performed for 1-1.5 minutes after adding the frother; In the roughing process of the copper-cobalt sulfide flotation, the amount of the collector is 80-120 g / t, and the amount of the frother is 15-30 g / t; In the scavenging process of the copper-cobalt sulfide flotation, the amount of the collector is 10-80 g / t, and the amount of the frother is 5-20 g / t; The concentrating process of the copper-cobalt sulfide flotation is blank concentrating.

5. The beneficiation method of copper-cobalt oxide and copper-cobalt sulfide mixed ore according to claim 3 or 4, characterized in that: The scavenging process of the copper-cobalt sulfide flotation includes more than two stages of scavenging: The scavenged concentrate obtained in the first stage of scavenging is returned to the roughing process of the copper-cobalt sulfide flotation, and the concentrate obtained in other stages of scavenging is returned to the previous stage of scavenging; The tailings obtained from the last stage of scavenging are copper-cobalt sulfide flotation tailings, and the tailings obtained from other stages of scavenging enter the next stage of scavenging; The flotation process of copper-cobalt sulfide includes more than two stages of concentration: The tailings obtained from the first stage of concentration are returned to the roughing process of the copper-cobalt sulfide flotation, and the tailings obtained from the other stages of concentration are returned to the previous stage of concentration; The concentrated ore obtained in the last stage of selection is copper-cobalt sulfide flotation concentrate, and the concentrates obtained in other stages of selection enter the next stage of selection.

6. The beneficiation method of copper-cobalt oxide and copper-cobalt sulfide mixed ore according to claim 5, characterized in that: The roughing process of the copper-cobalt sulfide flotation includes a first stage of roughing, the scavenging process of the copper-cobalt sulfide flotation includes three stages of scavenging, and the concentrating process of the copper-cobalt sulfide flotation includes four stages of concentrating; In the first stage of the flotation of copper-cobalt sulfide, the amount of collector is 60-80 g / t, and the amount of frother is 10-20 g / t; In the second stage of the flotation of the copper-cobalt sulfide, the amount of the collector is 30-40 g / t, and the amount of the frother is 5-10 g / t; In the third stage scavenging of the copper-cobalt sulfide flotation, the amount of collector used is 10-20 g / t, and the amount of frother used is 5-10 g / t.

7. The method for beneficiating a mixed ore of copper-cobalt oxide and copper-cobalt sulfide according to any one of claims 1 to 6, characterized in that: The tailings obtained from the sulfide ore screening are also subjected to drug removal treatment before the magnetic separation 2.

8. The beneficiation method of copper-cobalt oxide and copper-cobalt sulfide mixed ore according to claim 7, characterized in that: The de-doping treatment includes concentrated de-doping: the tailings obtained by screening the sulfide ore are concentrated to a pulp concentration of 50wt%-55wt%.

9. The method for beneficiating a mixed ore of copper-cobalt oxide and copper-cobalt sulfide according to any one of claims 1 to 8, characterized in that: Before performing the magnetic separation 2, adjusting the pulp concentration so that the pulp concentration fed into the magnetic separation 2 is 30wt%-35wt%; The magnetic separation 2 includes a strong magnetic roughing separation process and a strong magnetic sweeping separation process: The strong magnetic roughing process of the magnetic separation 2, the roughing tailings obtained are fed into the strong magnetic sweeping process of the magnetic separation 2; The concentrate obtained by the strong magnetic roughing process and the strong magnetic sweeping process of the magnetic separation 2 is the copper-cobalt oxide magnetic separation concentrate 2.

10. The beneficiation method of copper-cobalt oxide and copper-cobalt sulfide mixed ore according to claim 9, characterized in that: In the strong magnetic roughing process of the magnetic separation 2, the magnetic field strength is 1.0-1.1T, the pulsation frequency is 8-12Hz, and the flow rate of the slurry in the magnetic field is 0.3-0.4m 3 / h; In the strong magnetic sweeping process of the magnetic separation 2, the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-12Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.3m 3 / h; The tailings obtained in the strong magnetic sweeping process of the magnetic separation 2 are magnetic separation tailings 2; The magnetic separation 2 adopts a high gradient magnetic separator.

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