Beneficiation method for sulfur-oxygen mixed copper-cobalt ore

Abstract

The invention discloses a beneficiation method of sulfur-oxygen mixed copper-cobalt ore. The beneficiation method comprises the following steps: (1) ore grinding; (2) magnetic separation; the magnetic separation comprises a strong magnetic roughing procedure and a weak magnetic concentration procedure; the invention further comprises key parameters in magnetic separation. According to the method, most of the copper oxide-cobalt ores can be recycled from the sulfur-oxygen mixed copper-cobalt ores, and the good recycling effect is achieved; 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 and copper oxide, so that the overall mineral separation difficulty is reduced.

Description

Technical Field

[0001] The invention relates to the field of mixed copper-cobalt ore beneficiation, and in particular to a method for beneficiating sulfur-oxygen copper-cobalt mixed ore. Background Art

[0002] Copper has been an indispensable metal in human society since ancient times. Especially in the process of industrialization, copper has become an indispensable important metal in modern industry due to its superior properties. Cobalt metal is an important additive in the magnetic material industry, which has the function of improving the high temperature resistance and anti-aging performance in the production process of magnetic materials. Cobalt is widely used in the manufacture of magnetic materials, super alloys, spacecraft, battery materials, etc., and is also widely used in the medical industry.

[0003] 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, copper oxide minerals include malachite, chrysocolla, cuprite, chalcopyrite, and covellite, copper sulfide minerals include chalcocite, azurite, and chalcopyrite, and cobalt minerals include tonggu pyrolusite, cobalt dolomite, cobalt-containing malachite, sulfide copper diamond, hydrocobaltite, and cobalt sulphide.

[0004] Sulfur-oxygen mixed copper-cobalt ore refers to an ore that contains 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 the ore refers to the proportion of oxide ore in the total minerals in the ore, while the oxidation rate of sulfur-oxygen mixed copper-cobalt ore refers to the proportion of copper and cobalt oxides in the ore.

[0005] Compared with the flotation of sulfide ores, the flotation of oxide ores has always been a very challenging problem. The main reasons are as follows: First, the composition of oxide ores is usually very complex, usually containing a large amount of soluble salts (such as gypsum, copper sulfate, zinc sulfate, etc.) and oxides (such as carbonates, sulfates, silicates, arsenates, etc.). These components will not only condense the ore mud, but also react with carbonate ions to form calcium carbonate, which covers the surface of the mineral and is not conducive to flotation. Second, the structure of oxide ores is also relatively complex. The minerals in the ore are unevenly distributed in particle size, the distribution relationship is complex, and the lead and zinc oxides are complexly embedded and interpenetrated with the gangue minerals. This structure makes it difficult to grind the ore into a complete monomer state, which increases the difficulty of mineral processing. Third, the soluble salts and oxides in oxide ores are chemically unstable and prone to chemical reactions, forming a large amount of floating matter and precipitation. The mixing of these substances increases the difficulty of mineral processing. In the flotation process, these reasons are often superimposed on each other, resulting in worse flotation effects. Therefore, the flotation of oxide ores often requires additional treatment of the ore pulp. Traditional separation processes usually prioritize the floatation of sulfide ores and then oxide ores. If oxide ores are selected first and then sulfide ores, the flotation of sulfide ores often becomes extremely difficult.

[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, the sulfur-oxygen mixed copper-cobalt ore mainly adopts the process of flotation as the main and magnetic separation as the auxiliary, that is, the "copper sulfide flotation-copper-cobalt oxide mixed flotation-magnetic separation" process. This process has the disadvantages of large reagent consumption, high production cost, and unstable magnetic separation products when processing difficult-to-process complex copper-cobalt ores such as high binding rate, high mud, and carbonate. 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 beneficiation method for sulfur-oxygen mixed copper-cobalt ore with good recovery effect.

[0008] The technical solution adopted by the present invention to solve the technical problem is as follows: a method for beneficiating sulfur-oxygen mixed copper-cobalt ore, comprising the following steps:

[0009] (1) Grinding: Grinding the sulfur-oxygen mixed copper-cobalt ore and preparing it into raw ore slurry;

[0010] (2) Magnetic separation: The raw ore pulp is subjected to magnetic separation to obtain magnetic separation concentrate of copper and cobalt oxide and magnetic separation tailings;

[0011] The magnetic separation 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 a copper-cobalt oxide magnetic separation concentrate;

[0012] The magnetic field strength of the strong magnetic roughing process is above 0.9T;

[0013] The magnetic field strength of the weak magnetic concentration process is 0.2-0.7T.

[0014] Preferably, the copper grade of the sulfur-oxygen mixed copper-cobalt ore is 2.5wt%-4.0wt%, the cobalt grade is 0.2wt%-0.4wt%, and the oxidation rate is 30wt%-90wt%.

[0015] Preferably, the concentration of the raw ore slurry is 31wt%-35wt%.

[0016] Preferably, in step (1), the sulfur-oxygen mixed copper-cobalt ore is ground to a particle size of -0.074 mm with a content of 65wt%-70wt%.

[0017] Preferably, in step (2), the magnetic separation also includes a strong magnetic fine separation process.

[0018] More preferably, in step (2), the tailings obtained from the weak magnetic concentration process are fed into the strong magnetic fine sweeping process.

[0019] More preferably, in step (2), the concentrate obtained in the strong magnetic concentration step is returned to the weak magnetic concentration step.

[0020] Preferably, in step (2), the magnetic separation also includes a strong magnetic rough separation process.

[0021] More preferably, in step (2), the tailings obtained from the strong magnetic rough separation process are fed into the strong magnetic rough sweeping process.

[0022] More preferably, in step (2), the tailings obtained from the strong magnetic fine scavenging process are fed into the strong magnetic rough scavenging process.

[0023] More preferably, in step (2), the concentrate obtained from the strong magnetic roughing separation process is returned to the strong magnetic roughing separation process.

[0024] More preferably, in step (2), the tailings obtained by the strong magnetic rough separation process are magnetic separation tailings.

[0025] Preferably, in step (2), the strong magnetic roughing process: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-14Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h.

[0026] Preferably, in step (2), the magnetic field strength of the weak magnetic concentration process is 0.4-0.6T, the pulsation frequency is 8-12Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h.

[0027] Preferably, in step (2), the strong magnetic fine sweeping process: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-14Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h.

[0028] Preferably, in step (2), the strong magnetic rough sweeping process: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-14Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h.

[0029] Preferably, in step (2), the magnetic separation uses a high gradient magnetic separator.

[0030] Preferably, the beneficiation method of the sulfur-oxygen mixed copper-cobalt ore of the present invention further comprises copper-cobalt sulfide flotation: copper-cobalt sulfide flotation is carried out using the magnetic separation tailings as raw materials to obtain copper-cobalt sulfide flotation concentrate and copper-cobalt sulfide flotation tailings.

[0031] More preferably, the magnetic separation tailings are concentrated to a pulp concentration of 40-45% before copper-cobalt sulfide flotation.

[0032] More 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).

[0033] More preferably, the copper-cobalt sulfide flotation comprises a roughing process, a scavenging process and a cleaning process.

[0034] Further preferably, the coarse concentrate obtained in the roughing step of the copper-cobalt sulfide flotation is fed into the concentrating step of the copper-cobalt sulfide flotation.

[0035] Further 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.

[0036] Further preferably, the concentrated ore concentrate obtained in the concentrating step of the copper-cobalt sulfide flotation is a copper-cobalt sulfide flotation concentrate.

[0037] Further 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.

[0038] Further 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.

[0039] Further preferably, the scavenging tailings obtained in the scavenging step of the copper-cobalt sulfide flotation are copper-cobalt sulfide flotation tailings.

[0040] Further 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.

[0041] Further preferably, in the roughing process of the copper-cobalt sulfide flotation, the amount of the collector is 70-120 g / t, and the amount of the frother is 10-30 g / t.

[0042] Further preferably, in the scavenging process of the copper-cobalt sulfide flotation, the amount of the collector is 10-50 g / t, and the amount of the frother is 1-10 g / t.

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

[0044] Further preferably, in the roughing process and the scavenging process of the copper-cobalt sulfide flotation, the stirring time is 2-3 minutes after the collector is added, and the stirring time is 1-1.5 minutes after the frother is added.

[0045] Further preferably, the scavenging process of the copper-cobalt sulfide flotation comprises two or more scavenging stages:

[0046] 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;

[0047] 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.

[0048] Further preferably, the flotation process of copper-cobalt sulfide includes two or more stages of flotation:

[0049] 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;

[0050] 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.

[0051] More 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.

[0052] More preferably, in the first stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 30-50 g / t, and the amount of the frother is 5-10 g / t.

[0053] More preferably, in the second stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 30-50 g / t, and the amount of the frother is 1-10 g / t.

[0054] More preferably, in the third stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 10-30 g / t, and the amount of the frother is 1-5 g / t.

[0055] Preferably, the beneficiation method of the sulfur-oxygen mixed copper-cobalt ore of the present invention further comprises copper-cobalt oxide flotation: using the copper-cobalt sulfide flotation tailings obtained by the copper-cobalt sulfide flotation as a raw material, performing sulfide flotation to obtain a copper-cobalt oxide flotation concentrate.

[0056] More preferably, the sulfiding agent used in the flotation of copper cobalt oxide is sodium hydrosulfide; the collector used in the flotation of copper cobalt oxide is butyl xanthate; the frother used in the flotation of copper cobalt oxide is pine alcohol oil (i.e. 2 # Oil).

[0057] More preferably, the copper-cobalt oxide flotation comprises a roughing process and a scavenging process:

[0058] The roughing tailings obtained in the roughing process of the copper-cobalt oxide flotation are fed into the scavenging process of the copper-cobalt oxide flotation;

[0059] The concentrate obtained by the roughing process and the scavenging process of the copper-cobalt oxide flotation is the copper-cobalt oxide flotation concentrate.

[0060] More preferably, in the roughing process and the scavenging process of the copper cobalt oxide flotation, the order of adding reagents is: sulfiding agent, collecting agent, and frother.

[0061] Further preferably, in the roughing process of the copper cobalt oxide flotation, the dosage of the sulfiding agent is 600-1000 g / t, the dosage of the collector is 30-80 g / t, and the dosage of the frother is 10-25 g / t.

[0062] Further preferably, in the scavenging process of the copper cobalt oxide flotation, the dosage of the sulfiding agent is 100-400 g / t, the dosage of the collector is 10-30 g / t, and the dosage of the frother is 1-10 g / t.

[0063] Further preferably, in the roughing process of the copper cobalt oxide flotation, the stirring time after the addition of the sulfiding agent is 5-6 minutes, the stirring time after the addition of the collector is 2-3 minutes, and the stirring time after the addition of the frother is 1-1.5 minutes.

[0064] Further preferably, in the scavenging process of the copper cobalt oxide flotation, the stirring time after the addition of the sulfiding agent is 4-5 minutes, the stirring time after the addition of the collector is 2-3 minutes, and the stirring time after the addition of the frother is 1-1.5 minutes.

[0065] Further preferably, the scavenging process of the copper cobalt oxide flotation includes more than two stages of scavenging.

[0066] More preferably, the concentrate obtained in each scavenging stage is copper-cobalt oxide flotation concentrate; except for the last scavenging stage, the scavenging tailings obtained in other scavenging stages enter the next scavenging stage.

[0067] More preferably, the roughing process of the copper-cobalt oxide flotation includes one stage of roughing; and the scavenging process of the copper-cobalt oxide flotation includes four stages of scavenging.

[0068] More preferably, in the first stage of the flotation of copper cobalt oxide, the dosage of the sulfiding agent is 300-400 g / t, the dosage of the collector is 15-30 g / t, and the dosage of the frother is 5-10 g / t.

[0069] More preferably, in the second stage scavenging of the copper cobalt oxide flotation, the dosage of the sulfiding agent is 200-400 g / t, the dosage of the collector is 15-30 g / t, and the dosage of the frother is 1-10 g / t.

[0070] More preferably, in the third stage of the flotation of copper cobalt oxide, the dosage of the sulfiding agent is 100-200 g / t, the dosage of the collector is 10-15 g / t, and the dosage of the frother is 1-5 g / t.

[0071] More preferably, in the fourth stage of the flotation of copper cobalt oxide, the dosage of the sulfiding agent is 100-200 g / t, the dosage of the collector is 10-15 g / t, and the dosage of the frother is 1-5 g / t.

[0072] The present invention has the following beneficial effects:

[0073] (1) The present invention can recover most of the oxidized copper-cobalt ore from the sulfur-oxygen mixed copper-cobalt ore, and has a good recovery effect;

[0074] (2) After the magnetic separation process of the present invention, the amount of ore decreases by about 5%-10%, and the amount of copper and cobalt metal decreases by about 20-50%, thereby reducing the equipment configuration requirements for subsequent recovery;

[0075] (3) The amount of copper-cobalt oxide ore in the magnetic separation tailings is significantly reduced, which reduces the interference caused by copper-cobalt oxide ore in the subsequent recovery of copper-cobalt sulfide ore;

[0076] (4) The present invention utilizes the difference in the coexistence relationship between magnetic cobalt minerals and copper sulfide and copper oxide (both copper cobalt sulfide ore and copper cobalt oxide ore are magnetic, but copper cobalt sulfide ore is less magnetic), and adopts a magnetic separation process combining strong and weak magnetic fields 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;

[0077] (5) The present invention makes full use of the preferential separation of coarse-grained copper-cobalt ore by magnetic separation in the sulfur-oxygen mixed copper-cobalt ore. The fineness of the magnetic separation tailings obtained after the coarse grinding of the raw ore is increased compared with the raw ore. Therefore, the present invention can appropriately reduce the grinding fineness during grinding, while reducing the grinding consumption, and will not have an adverse effect on the further utilization of the obtained magnetic separation tailings.

[0078] 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

[0079] 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:

[0080] Figure 1 It is a process flow chart of the mineral processing method of sulfur-oxygen mixed copper-cobalt ore in Example 1 of the present invention. DETAILED DESCRIPTION

[0081] 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.

[0082] 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.

[0083] 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.

[0084] An embodiment of the present invention provides a method for beneficiating sulfur-oxygen mixed copper-cobalt ore, comprising the following steps:

[0085] (1) Grinding: Grinding the sulfur-oxygen mixed copper-cobalt ore and preparing it into raw ore slurry;

[0086] (2) Magnetic separation: The raw ore pulp is subjected to magnetic separation to obtain magnetic separation concentrate of copper and cobalt oxide and magnetic separation tailings;

[0087] The magnetic separation 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 a copper-cobalt oxide magnetic separation concentrate;

[0088] The magnetic field strength of the strong magnetic roughing process is above 0.9T;

[0089] The magnetic field strength of the weak magnetic concentration process is 0.2-0.7T.

[0090] The magnetic separation process 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 technology, which can generally only separate magnetic and non-magnetic minerals, and cannot separate 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.

[0091] The ore dressing method provided by the embodiment of the present invention has the following advantages:

[0092] (1) The magnetic separation process of the present invention can recover most of the oxidized copper-cobalt ore from the sulfur-oxygen mixed copper-cobalt ore, and has a good recovery effect;

[0093] (2) After the magnetic separation process of the present invention, the amount of ore decreases by about 5%-10%, and the amount of copper and cobalt metal decreases by about 20-50%, thereby reducing the equipment configuration requirements for subsequent recovery;

[0094] (3) The amount of copper-cobalt oxide ore in the magnetic separation tailings is significantly reduced, which reduces the interference caused by copper-cobalt oxide ore in the subsequent recovery of copper-cobalt sulfide ore;

[0095] (4) The present invention utilizes the difference in the coexistence relationship between magnetic cobalt minerals and copper sulfide and copper oxide (both copper cobalt sulfide ore and copper cobalt oxide ore are magnetic, but copper cobalt sulfide ore is less magnetic), and adopts a magnetic separation process combining strong and weak magnetic fields 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;

[0096] (5) The present invention makes full use of the preferential separation of coarse-grained copper-cobalt ore by magnetic separation in the sulfur-oxygen mixed copper-cobalt ore. The fineness of the magnetic separation tailings obtained after the coarse grinding of the raw ore is increased compared with the raw ore. Therefore, the present invention can appropriately reduce the grinding fineness during grinding, while reducing the grinding consumption, and will not have an adverse effect on the further utilization of the obtained magnetic separation tailings.

[0097] In an embodiment of the present invention, the copper grade of the sulfur-oxygen mixed copper-cobalt ore is 2.5wt%-4.0wt%, the cobalt grade is 0.2wt%-0.4wt%, and the oxidation rate is 30wt%-90wt%.

[0098] In an embodiment of the present invention, the concentration of the raw ore slurry is 31wt%-35wt%.

[0099] In some embodiments of the present invention, clean water and / or return water obtained by concentrating the magnetic tailings are added to participate in the grinding.

[0100] In some embodiments of the present invention, the grinding process does not require the addition of reagents.

[0101] In some embodiments of the present invention, in step (2), the magnetic separation 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.

[0102] In some embodiments of the present invention, the magnetic separator is a vertical ring high gradient magnetic separator. Other magnetic separators with similar functions can be used.

[0103] In an embodiment of the present invention, in step (1), the sulfur-oxygen mixed copper-cobalt ore is ground to a particle size of -0.074 mm with a content of 65wt%-70wt%. Compared with the general sulfur-oxygen mixed copper-cobalt ore grinding process, the fineness level is lower. This solution can utilize the associated relationship between copper and cobalt itself to increase the content of copper minerals associated with cobalt in the ore pulp. Since cobalt-containing minerals have weak magnetism, copper minerals associated with cobalt can be selected with cobalt minerals as magnetic carriers in magnetic separation. This technical solution can reduce grinding consumption while increasing the recovery rate of copper minerals in magnetic separation.

[0104] In some embodiments of the present invention, in step (2), the magnetic separation also includes a strong magnetic fine scanning process.

[0105] In some embodiments of the present invention, in step (2), the tailings obtained from the weak magnetic concentration process are fed into the strong magnetic fine separation process.

[0106] In some embodiments of the present invention, in step (2), the concentrate obtained in the strong magnetic concentration process is returned to the weak magnetic concentration process.

[0107] In some embodiments of the present invention, in step (2), the magnetic separation also includes a strong magnetic rough separation process.

[0108] In some embodiments of the present invention, in step (2), the tailings obtained from the strong magnetic rough separation process are fed into the strong magnetic rough sweeping process.

[0109] In some embodiments of the present invention, in step (2), the tailings obtained from the high-intensity magnetic fine scavenging process are fed into the high-intensity magnetic rough scavenging process.

[0110] In some embodiments of the present invention, in step (2), the concentrate obtained in the high-intensity magnetic roughing separation process is returned to the high-intensity magnetic roughing separation process.

[0111] In some embodiments of the present invention, in step (2), the tailings obtained by the strong magnetic rough separation process are magnetic separation tailings.

[0112] The magnetic separation process that combines strong magnetic roughing separation, weak magnetic concentrating separation, strong magnetic fine sweeping separation and strong magnetic roughing sweeping separation can achieve better mineral processing effects.

[0113] In some embodiments of the present invention, in step (2), the strong magnetic roughing process: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-14Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h.

[0114] In some embodiments of the present invention, in step (2), the magnetic field strength of the weak magnetic concentration process is 0.4-0.6T, the pulsation frequency is 8-12Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h.

[0115] In some embodiments of the present invention, in step (2), the strong magnetic fine sweeping process: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-14Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h.

[0116] In some embodiments of the present invention, in step (2), the strong magnetic rough sweeping process: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-14Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h.

[0117] In some embodiments of the present invention, the beneficiation method of the sulfur-oxygen mixed copper-cobalt ore of the present invention also includes copper-cobalt sulfide flotation: copper-cobalt sulfide flotation is carried out using the magnetic separation tailings as raw materials to obtain copper-cobalt sulfide flotation concentrate and copper-cobalt sulfide flotation tailings. Since the magnetic separation has already recovered most of the oxidized copper-cobalt ore in advance, the copper-cobalt sulfide flotation using the magnetic separation tailings as raw materials can reduce the amount of ore entering the flotation by about 5%-10%, and accordingly, the configuration of the flotation equipment can be reduced by 5-10%; the magnetic separation also reduces the amount of copper-cobalt metal entering the flotation by about 20%-50%, which can reduce the consumption of flotation reagents; the technical solution has good economic benefits. The oxidized copper-cobalt ore in the magnetic separation tailings is significantly reduced compared with the original ore, and the interference of the oxidized copper-cobalt ore is also reduced, which also has a positive effect on improving the taste of the copper-cobalt sulfide flotation concentrate product. In some embodiments of the present invention, a flotation effect with a copper grade greater than 60% can be obtained.

[0118] In some embodiments of the present invention, the magnetic tailings are concentrated to a pulp concentration of 40-45% before copper-cobalt sulfide flotation. The magnetic tailings are concentrated to a higher concentration before 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.

[0119] In some embodiments of the present invention, the return water obtained by concentrating the magnetic tailings is returned to step (1) to participate in ore grinding.

[0120] 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).

[0121] In some embodiments of the present invention, the copper-cobalt sulfide flotation includes a roughing process, a scavenging process and a cleaning process.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] In some embodiments of the present invention, in the roughing process of the copper-cobalt sulfide flotation, the amount of the collector is 70-120 g / t, and the amount of the frother is 10-30 g / t.

[0130] In some embodiments of the present invention, in the scavenging process of the copper-cobalt sulfide flotation, the amount of the collector is 10-50 g / t, and the amount of the frother is 1-10 g / t.

[0131] In some embodiments of the present invention, the concentrating process of copper-cobalt sulfide flotation is blank concentrating.

[0132] In some embodiments of the present invention, in the roughing process and scavenging process of the copper-cobalt sulfide flotation, the collector is stirred for 2-3 minutes after addition, and the frother is stirred for 1-1.5 minutes after addition.

[0133] In some embodiments of the present invention, the scavenging process of the copper-cobalt sulfide flotation includes two or more scavenging stages:

[0134] 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;

[0135] 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.

[0136] In some embodiments of the present invention, the flotation process of copper-cobalt sulfide includes two or more stages of concentrating:

[0137] 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;

[0138] 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.

[0139] 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.

[0140] In some embodiments of the present invention, in the four-stage concentrating of the copper-cobalt sulfide flotation, the concentrating tailings produced in the first stage of concentrating are returned to the roughing stage; the concentrating tailings produced in the second, third and fourth stages of concentrating are returned to the previous concentrating process in sequence; the concentrating concentrates produced in the first, second and third stages of concentrating are sequentially entered into the next concentrating process; and the concentrating concentrates produced in the fourth stage of concentrating are copper-cobalt sulfide flotation concentrates.

[0141] In some embodiments of the present invention, in the three-stage scavenging of the copper-cobalt sulfide flotation, the scavenged concentrate obtained in the first stage is returned to the roughing process, the concentrate obtained in the second stage is returned to the first stage, and the concentrate obtained in the third stage is returned to the second stage; the tailings obtained in the first stage enter the second stage, the tailings obtained in the second stage enter the third stage, and the tailings obtained in the third stage are the copper-cobalt sulfide flotation tailings.

[0142] In some embodiments of the present invention, in the first stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 30-50 g / t, and the amount of the frother is 5-10 g / t.

[0143] In some embodiments of the present invention, in the second stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 30-50 g / t, and the amount of the frother is 1-10 g / t.

[0144] In some embodiments of the present invention, in the third stage scavenging of the copper-cobalt sulfide flotation, the amount of the collector is 10-30 g / t, and the amount of the frother is 1-5 g / t.

[0145] In some embodiments of the present invention, the beneficiation method of the sulfur-oxygen mixed copper-cobalt ore of the present invention further comprises copper-cobalt oxide flotation: using the copper-cobalt sulfide flotation tailings obtained by the copper-cobalt sulfide flotation as raw materials, sulfide flotation is performed to obtain copper-cobalt oxide flotation concentrate. Since most of the copper-cobalt oxide ore has been recovered in advance by magnetic separation, the content of copper-cobalt oxide minerals in the copper-cobalt oxide flotation process is reduced, making the copper-cobalt oxide ore sulfide flotation easier to control, and to a certain extent overcomes the problems of difficult control of the sulfide process, poor selectivity, and low recovery rate when sulfide flotation of copper-cobalt oxide ore.

[0146] In some embodiments of the present invention, the sulfiding agent used in the copper-cobalt oxide flotation is sodium hydrosulfide; the collector used in the copper-cobalt oxide flotation is butyl xanthate; the frother used in the copper-cobalt oxide flotation is pine alcohol oil (i.e., 2 # Oil).

[0147] In some embodiments of the present invention, the copper-cobalt oxide flotation comprises a roughing process and a scavenging process:

[0148] The roughing tailings obtained in the roughing process of the copper-cobalt oxide flotation are fed into the scavenging process of the copper-cobalt oxide flotation;

[0149] The concentrate obtained by the roughing process and the scavenging process of the copper-cobalt oxide flotation is the copper-cobalt oxide flotation concentrate.

[0150] In some embodiments of the present invention, the tailings obtained in the scavenging process of the copper-cobalt oxide flotation are copper-cobalt oxide flotation tailings.

[0151] In some embodiments of the present invention, in the roughing process and the scavenging process of the copper-cobalt oxide flotation, the order of adding reagents is: sulfiding agent, collecting agent, and frother.

[0152] In some embodiments of the present invention, in the roughing process of copper cobalt oxide flotation, the dosage of sulfiding agent is 600-1000 g / t, the dosage of collector is 30-80 g / t, and the dosage of frother is 10-25 g / t.

[0153] In some embodiments of the present invention, in the scavenging process of copper cobalt oxide flotation, the dosage of sulfiding agent is 100-400 g / t, the dosage of collector is 10-30 g / t, and the dosage of frother is 1-10 g / t.

[0154] In some embodiments of the present invention, in the roughing process of copper cobalt oxide flotation, the stirring time after the addition of the sulfiding agent is 5-6 minutes, the stirring time after the addition of the collector is 2-3 minutes, and the stirring time after the addition of the frother is 1-1.5 minutes.

[0155] In some embodiments of the present invention, in the scavenging process of copper cobalt oxide flotation, the stirring time after the addition of the sulfiding agent is 4-5 minutes, the stirring time after the addition of the collector is 2-3 minutes, and the stirring time after the addition of the frother is 1-1.5 minutes.

[0156] In some embodiments of the present invention, the scavenging process of copper cobalt oxide flotation includes more than two stages of scavenging.

[0157] In some embodiments of the present invention, the concentrate obtained in each scavenging stage is a copper-cobalt oxide flotation concentrate; except for the last scavenging process, the scavenging tailings obtained in other scavenging stages enter the next scavenging process.

[0158] In some embodiments of the present invention, the tailings obtained in the last scavenging process are copper-cobalt oxide flotation tailings.

[0159] In some embodiments of the present invention, the roughing process of the copper-cobalt oxide flotation includes one stage of roughing; and the scavenging process of the copper-cobalt oxide flotation includes four stages of scavenging.

[0160] In some embodiments of the present invention, the roughing tailings obtained in the roughing process of the copper-cobalt oxide flotation are fed into the scavenging process of the copper-cobalt oxide flotation; in the four scavenging processes of the copper-cobalt oxide flotation, the scavenging tailings obtained in the first scavenging process enter the second scavenging process; the scavenging tailings obtained in the second scavenging process enter the third scavenging process; the scavenging tailings obtained in the third scavenging process enter the fourth scavenging process; the tailings obtained in the fourth scavenging process of the copper-cobalt oxide flotation are flotation tailings; the concentrates obtained in the roughing process of the copper-cobalt oxide flotation and each scavenging process are copper-cobalt oxide flotation concentrates.

[0161] In some embodiments of the present invention, in the first stage of the flotation of copper cobalt oxide, the dosage of the sulfiding agent is 300-400 g / t, the dosage of the collector is 15-30 g / t, and the dosage of the frother is 5-10 g / t.

[0162] In some embodiments of the present invention, in the second stage scavenging of the copper-cobalt oxide flotation, the dosage of the sulfiding agent is 200-400 g / t, the dosage of the collector is 15-30 g / t, and the dosage of the frother is 1-10 g / t.

[0163] In some embodiments of the present invention, in the third stage of the flotation of copper cobalt oxide, the dosage of the sulfiding agent is 100-200 g / t, the dosage of the collector is 10-15 g / t, and the dosage of the frother is 1-5 g / t.

[0164] In some embodiments of the present invention, in the fourth stage of the flotation of copper cobalt oxide, the dosage of the sulfiding agent is 100-200 g / t, the dosage of the collector is 10-15 g / t, and the dosage of the frother is 1-5 g / t.

[0165] In the embodiments of the present invention, the magnetism of the copper-cobalt ore is effectively utilized, and the recovery rate of copper and cobalt valuable metals is improved through a preliminary magnetic separation process, and the subsequent flotation effect of copper-cobalt sulfide and copper-cobalt oxide is improved. Finally, the comprehensive recovery rates of copper and cobalt obtained by the closed-circuit process can reach more than 83% and more than 70%, respectively. At the same time, the amount of reagents used in the flotation of sulfur-oxygen mixed copper-cobalt ore is greatly reduced, solving the problems of high reagent consumption and low recovery rate of valuable metals in this type of ore.

[0166] In the embodiment of the present invention, the reason why the sulfur-oxygen mixed copper-cobalt ore is first subjected to magnetic separation after grinding can be explained by the following mechanism:

[0167] When separating sulfur-oxygen mixed copper-cobalt ores, the particles in the slurry are separated according to the difference in magnetic force. Useful magnetic particles and magnetic gangue particles are subject to competitive capture due to equal magnetic forces. Mineral particles are simultaneously affected by magnetic force and competitive force in an uneven magnetic field. Particles with strong magnetic force are captured and enter the concentrate, while particles with strong competitive force are repelled and enter the tailings. The direction of the magnetic field is consistent with the direction of the magnetic field gradient.

[0168] The particles are considered to be spheres with uniform shape and the same radius (radius R, volume V = 4 / 3πR 3 ), the magnetic force on the particle in the magnetic field can be expressed as formula (1):

[0169]

[0170] Where: F m is the magnetic force on the particle, N; ρ is the density of the particle, kg / m 3 ; μ0 is the vacuum permeability, which is 4π×10 - 7 H / A 2 ; k is the volume magnetic susceptibility of the particle, dimensionless; R is the radius of the particle, m; H is the magnetic field intensity, A / m; gradH is the magnetic field gradient, A / m 2 ; HgradH is the magnetic field force, A 2 / m 3 ;

[0171] From formula (1), we can know that the magnetic force F on the magnetic particles is m The size is related to and proportional to its own magnetic susceptibility k, radius R, and magnetic field force HgradH.

[0172] In the process of magnetic separation, particles are not only affected by gravity but also by some competitive forces, such as gravity, fluid drag, friction, etc. Here we only describe the two competitive forces, gravity and fluid drag, which play an important role in the high gradient magnetic separation process.

[0173] During high gradient magnetic separation, the effective gravity exerted on particles in the fluid medium is expressed as formula (2):

[0174] F g =4 / 3π(ρ-ρ1)R 3 g (2)

[0175] Where: F g is the effective gravity, N; ρ is the density of the particle, kg / m 3 ; ρ1 is the density of the fluid medium, kg / m 3 ; R is the radius of the particle, m; g is the acceleration due to gravity, its value is 9.81 m / s 2 .

[0176] From formula (2), we can know that the effective gravity F on the particle is g Related to the radius R and proportional to its cube.

[0177] 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 as formula (3):

[0178] F d =6πη0R(v p -v f ) (3)

[0179] Where: F d is the fluid drag, N; η0 is the dynamic viscosity of the fluid, Pa·s; R is the radius of the particle, m; v p is the particle velocity, m / s; v f is the velocity of the fluid, m / s.

[0180] Formula (3) shows that the fluid drag force F on the particle is d It is related to the radius R and is proportional to its first power.

[0181] As mentioned above, particles are affected by both magnetic force and competitive force during high gradient magnetic separation. Therefore, the combined force of magnetic force and competitive force determines the movement trajectory of particles. The separation of particles requires certain prerequisites, and there is a relationship between magnetic force and competitive force at this time.

[0182] The magnetic separation process can only occur in a non-uniform field. When particles enter the separation area of ​​the magnetic separator, they are simultaneously subjected to magnetic force and competitive force (gravity and fluid drag, etc.). In order to separate strongly magnetic particles from weakly magnetic particles, the magnetic force and competitive force acting on the particles must satisfy the condition of formula (4):

[0183]

[0184] Where: F m is the magnetic force on particles with strong magnetic properties, N; is the magnetic force on particles with weak magnetic properties, N; F c is the sum of all competing forces in the opposite direction of the magnetic force, N;

[0185] Formula (4) shows that, for particles with stronger magnetism, the magnetic force is greater than the competitive force, and for particles with weaker magnetism, the competitive force is greater than the magnetic force, and the two are separated due to the difference in the forces.

[0186] In actual magnetic separation, according to formula (1), the magnetic force exerted on the particles is not only related to the magnetic separation intensity H, but also proportional to the magnetic susceptibility, volume and magnetic field gradient of the particles. Therefore, for copper-cobalt oxide ore ground to a certain fineness, different magnetism is exhibited in mineral particles of different particle sizes due to the different associated relationships and dissociation degrees between copper-cobalt minerals. When high-gradient magnetic separation is used for separation, copper-cobalt oxide mineral particles with coarser particle size or relatively strong magnetism can obtain sufficient magnetic force to overcome the effect of competitiveness under the same field strength and magnetic field gradient, thereby achieving efficient separation. The present invention grinds the sulfur-oxygen mixed copper-cobalt ore and then performs magnetic separation, which can better control the particle size of the feed material for magnetic separation, thereby achieving better separation effect.

[0187] Example

[0188] The following examples describe the disclosure of the present invention in more detail, and these examples are intended for illustrative purposes only, as various modifications and variations within the scope of the disclosure of the present invention will be apparent to those skilled in the art. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples are by weight, and all reagents used in the examples are commercially available or synthesized according to conventional methods and can be used directly without further processing, and the instruments used in the examples are commercially available.

[0189] Example 1

[0190] 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 0.26% cobalt, and the copper oxidation rate is 37.28%.

[0191] The process flow chart of this embodiment is as follows Figure 1 The beneficiation method of sulfur-oxygen mixed copper-cobalt ore provided in this embodiment is carried out according to the following steps:

[0192] (1) Grinding: Grind the sulfur-oxygen mixed copper-cobalt ore, use clean water as the grinding water, and do not add any reagents during the grinding process; grind to a particle size content of -0.074 mm with a particle size content of 70%; and a pulp concentration of 31.35%.

[0193] (2) Magnetic separation: 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 rough sweeping separation using a vertical ring high gradient magnetic separator;

[0194] The detailed process of magnetic separation is as follows:

[0195] The magnetic field strength of the strong magnetic roughing is 1.2T, the pulsation frequency is 14Hz, and the flow rate of the slurry in the magnetic field is 0.4m3 / 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;

[0196] The magnetic field strength of weak magnetic concentration is 0.6T, the pulsation frequency is 8Hz, and the flow rate of the slurry in the magnetic field is 0.2m 3 / h, the obtained concentrate is magnetically separated copper-cobalt oxide concentrate, and the obtained tailings are fed into the strong magnetic separation process;

[0197] The magnetic field strength of the strong magnetic fine sweeping 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 is returned to the weak magnetic concentration process, and the tailings are fed to the strong magnetic rough sweeping process;

[0198] 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 0.3m 3 / h, the concentrate is returned to the strong magnetic roughing process, and the tailings obtained are magnetic separation tailings, which are fed to the sulfide ore flotation process in step (3).

[0199] The screening results of the magnetic tailings showed that the fineness of the magnetic tailings was -200 mesh, accounting for 72.38%. The copper oxide content in the magnetic concentrate was measured to be 12.43%, accounting for 96.58% of the total copper content, proving that the magnetic concentrate obtained was copper-cobalt oxide ore.

[0200] (3) Flotation of sulfide ore (copper-cobalt sulfide):

[0201] a. Roughing: Add 120 g / t of collector (butyl xanthate) to the magnetic tailings concentrated to a pulp concentration of 40.03%, stir for 2 min, add 25 g / t of frother (pine oil), stir for 1 min, and then aerate and float to obtain copper-cobalt sulfide roughing concentrate and copper-cobalt sulfide roughing tailings;

[0202] b. Scavenging 1: Add 50 g / t of collector (butyl xanthate) to the copper-cobalt sulfide roughing tailings, stir for 2 min, then add 10 g / t of frother (pine oil), stir for 1 min, then aerate and flotate 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 is subjected to a second scavenging;

[0203] c. Scavenging 2: Add 50 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 flotate to obtain copper-cobalt sulfide scavenging concentrate 2 and copper-cobalt sulfide scavenging tailings 2, return the copper-cobalt sulfide scavenging concentrate 2 to scavenging 1, and perform the third scavenging of the copper-cobalt sulfide scavenging tailings 2;

[0204] d. Scavenging 3: adding 30 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailing 2, stirring for 2 min, adding 5 g / t of frother (pine oil), stirring for 1 min, and then aerating flotation to obtain copper-cobalt sulfide scavenging concentrate 3 and copper-cobalt sulfide scavenging tailing 3, the copper-cobalt sulfide scavenging concentrate 3 returns to scavenging 3, the copper-cobalt sulfide scavenging tailing 3 is the copper-cobalt sulfide flotation tailing, and is fed to the oxide ore flotation process of step (4);

[0205] e. Selection: Select four blank sections;

[0206] The copper-cobalt sulfide rougher concentrate is firstly concentrated 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 process;

[0207] The copper-cobalt sulfide concentrated ore 1 is subjected to a second concentration to obtain the copper-cobalt sulfide concentrated ore 2 and the copper-cobalt sulfide concentrated tailings 2; the copper-cobalt sulfide concentrated tailings 2 are returned to the first concentration process;

[0208] The copper-cobalt sulfide concentrated ore 2 is subjected to a third 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 concentration process;

[0209] The copper-cobalt sulfide concentrated concentrate 3 is subjected to the fourth 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. The copper-cobalt sulfide concentrated tailings 4 are returned to the third copper-cobalt sulfide concentration process.

[0210] (4) Flotation of oxide ore (copper and cobalt oxide):

[0211] a. Roughing: Add 600 g / t of sulfiding agent (sodium hydrosulfide) to the copper-cobalt sulfide flotation tailings of step (3), stir for 5 min, add 35 g / t of collector (butyl xanthate), stir for 2 min, add 10 g / t of foaming agent (pine oil), stir for 1 min, and then aerate for flotation to obtain copper oxide roughing concentrate 1 and copper oxide cobalt roughing tailings;

[0212] b. Scavenging 1: Add 300 g / t of sulfiding agent (sodium hydrosulfide) to the copper-cobalt oxide roughing tailings, stir for 4 minutes, then add 15 g / t of collector (butyl xanthate), stir for 2 minutes, then add 5 g / t of frother (pine oil), stir for 1 minute, then aerate for flotation to obtain copper-cobalt oxide scavenging concentrate 1 and copper-cobalt oxide scavenging tailings 1;

[0213] c. Scavenging 2, adding 200g / t of sulfiding agent (sodium hydrosulfide) to the copper-cobalt oxide scavenging tailings 1, stirring for 4 minutes, adding 15g / t of collector (butyl xanthate), stirring for 2 minutes, adding 2.5g / t of frother (pine oil), stirring for 1 minute, and then aerating for flotation to obtain copper-cobalt oxide scavenging concentrate 2 and copper-cobalt oxide scavenging tailings 2;

[0214] d. Scavenging 3, adding 100 g / t of sulfiding agent (sodium hydrosulfide) to the copper-cobalt oxide scavenging tailings 2, stirring for 4 minutes, adding 15 g / t of collector (butyl xanthate), stirring for 2 minutes, adding 2.5 g / t of frother (pine oil), stirring for 1 minute, and then aerating for flotation to obtain copper-cobalt oxide scavenging concentrate 3 and copper-cobalt oxide scavenging tailings 3;

[0215] e. Scavenging 4, add sulfiding agent (sodium hydrosulfide) 100g / t to the copper cobalt oxide scavenging tailings 3, stir for 4 minutes, add collector (butyl xanthate) 10g / t, stir for 2 minutes, add frother (pine oil) 2.5g / t, stir for 1 minute, and then aerate for flotation to obtain copper cobalt oxide scavenging concentrate 4 and copper cobalt oxide scavenging tailings 4 (i.e., final flotation tailings).

[0216] The concentrates from roughing and scavenging of oxide ore are combined to obtain the final oxide copper-cobalt flotation concentrate.

[0217] 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 1.

[0218] Table 1 Magnetic flotation separation test index of a sulfur-oxygen copper-cobalt ore in Congo (DRC)

[0219]

[0220]

[0221] From the test results in Table 1, it can be seen that the copper recovery rate in the magnetic separation copper-cobalt oxide concentrate is more than 20%, and the cobalt recovery rate is more than 35%, which has a very good recovery effect. Compared with the data of the copper-cobalt oxide flotation concentrate, it can be seen that most of the copper-cobalt oxide has been recovered through magnetic separation. The copper-cobalt sulfide flotation concentrate has a high grade and can obtain a flotation effect with a copper grade greater than 60%. The copper recovery rate in the total concentrate is more than 90%, and the cobalt recovery rate is more than 70%.

[0222] Example 2

[0223] 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 3.0% copper, about 0.28% cobalt, and the copper oxidation rate is 57.93%.

[0224] The beneficiation method of sulfur-oxygen mixed copper-cobalt ore provided in this embodiment is carried out according to the following steps:

[0225] (1) Grinding: The sulfur-oxygen mixed copper-cobalt ore is ground, the grinding water is clean water, and no reagents are added during the grinding process; the particle size content of the ore is ground to a fineness of -0.074 mm and the content is 67.78%; the slurry concentration is 33.34%.

[0226] (2) Magnetic separation: 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 rough sweeping separation using a vertical ring high gradient magnetic separator;

[0227] The detailed process of magnetic separation is as follows:

[0228] The magnetic field strength of the strong magnetic roughing is 1.2T, the pulsation frequency is 14Hz, 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;

[0229] The magnetic field strength of weak magnetic concentration is 0.6T, the pulsation frequency is 8Hz, and the flow rate of the slurry in the magnetic field is 0.2m 3 / h, the obtained concentrate is magnetically separated copper-cobalt oxide concentrate, and the obtained tailings are fed into the strong magnetic separation process;

[0230] The magnetic field strength of the strong magnetic fine sweeping 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 is returned to the weak magnetic concentration process, and the tailings are fed to the strong magnetic rough sweeping process;

[0231] 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 0.3m 3 / h, the concentrate is returned to the strong magnetic roughing process, and the tailings obtained are magnetic separation tailings, which are fed to the sulfide ore flotation process in step (3).

[0232] The screening results of the magnetic tailings showed that the fineness of the magnetic tailings was -200 mesh, accounting for 70.10%. The copper oxide content in the magnetic concentrate was measured to be 14.12%, accounting for 96.98% of the total copper content, proving that the magnetic concentrate obtained was copper-cobalt oxide ore.

[0233] (3) Flotation of sulfide ore (copper-cobalt sulfide):

[0234] a. Roughing: add 100g / t of collector (butyl xanthate) to the tailings concentrated to a pulp concentration of 42.76%, stir for 2 minutes, add 15g / t of frother (pine oil), stir for 1 minute, and then aerate and float to obtain copper-cobalt sulfide roughing concentrate and copper-cobalt sulfide roughing tailings;

[0235] b. Scavenging 1: Add 40 g / t of collector (butyl xanthate) to the copper-cobalt sulfide roughing tailings, stir for 2 min, then add 10 g / t of frother (pine oil), stir for 1 min, then aerate and flotate 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 is subjected to a second scavenging;

[0236] c. Scavenging 2: Add 40 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailing 1, 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 2 and copper-cobalt sulfide scavenging tailing 2. The copper-cobalt sulfide scavenging concentrate 2 is returned to scavenging 1, and the copper-cobalt sulfide scavenging tailing 2 is scavenged for the third time;

[0237] d. Scavenging 3: Add 20 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailings 2, stir for 2 min, then add 5 g / t of frother (pine oil), stir for 1 min, then aerate and flotate to obtain copper-cobalt sulfide scavenging concentrate 3 and copper-cobalt sulfide scavenging tailings 3, the copper-cobalt sulfide scavenging concentrate 3 returns to scavenging 3, the copper-cobalt sulfide scavenging tailings 3 are copper-cobalt sulfide flotation tailings, and are fed to the oxide ore flotation process of step (4);

[0238] e. Selection: Select four blank sections;

[0239] The copper-cobalt sulfide rougher concentrate is firstly concentrated 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 process;

[0240] The copper-cobalt sulfide concentrated ore 1 is subjected to a second concentration to obtain the copper-cobalt sulfide concentrated ore 2 and the copper-cobalt sulfide concentrated tailings 2; the copper-cobalt sulfide concentrated tailings 2 are returned to the first concentration process;

[0241] The copper-cobalt sulfide concentrated ore 2 is subjected to a third 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 concentration process;

[0242] The copper-cobalt sulfide concentrated concentrate 3 is subjected to the fourth 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. The copper-cobalt sulfide concentrated tailings 4 are returned to the third copper-cobalt sulfide concentration process.

[0243] (4) Flotation of oxide ore (copper and cobalt oxide):

[0244] a. Roughing: Add sulfiding agent (sodium hydrosulfide) 800 g / t to the copper-cobalt sulfide flotation tailings of step (3), stir for 5.5 min, add collector (butyl xanthate) 40 g / t, stir for 2 min, add foaming agent (pine oil) 10 g / t, stir for 1 min, and then aerate for flotation to obtain copper oxide roughing concentrate 1 and copper oxide cobalt roughing tailings;

[0245] b. Scavenging 1: Add 300 g / t of sulfiding agent (sodium hydrosulfide) to the copper-cobalt oxide roughing tailings, stir for 4.5 minutes, then add 20 g / t of collector (butyl xanthate), stir for 2 minutes, then add 5 g / t of frother (pine oil), stir for 1 minute, then aerate for flotation to obtain copper-cobalt oxide scavenging concentrate 1 and copper-cobalt oxide scavenging tailings 1;

[0246] c. Scavenging 2, adding 200 g / t of sulfiding agent (sodium hydrosulfide) to the copper-cobalt oxide scavenging tailings 1, stirring for 4 minutes, adding 20 g / t of collector (butyl xanthate), stirring for 2 minutes, adding 2.5 g / t of frother (pine oil), stirring for 1 minute, and then aerating for flotation to obtain copper-cobalt oxide scavenging concentrate 2 and copper-cobalt oxide scavenging tailings 2;

[0247] d. Scavenging 3, adding 100 g / t of sulfiding agent (sodium hydrosulfide) to the copper-cobalt oxide scavenging tailings 2, stirring for 4 minutes, adding 10 g / t of collector (butyl xanthate), stirring for 2 minutes, adding 2.5 g / t of frother (pine oil), stirring for 1 minute, and then aerating for flotation to obtain copper-cobalt oxide scavenging concentrate 3 and copper-cobalt oxide scavenging tailings 3;

[0248] e. Scavenging 4, add sulfiding agent (sodium hydrosulfide) 100g / t to the copper cobalt oxide scavenging tailings 3, stir for 4 minutes, add collector (butyl xanthate) 10g / t, stir for 2 minutes, add frother (pine oil) 2.5g / t, stir for 1 minute, and then aerate for flotation to obtain copper cobalt oxide scavenging concentrate 4 and copper cobalt oxide scavenging tailings 4 (i.e., final flotation tailings).

[0249] The concentrates from roughing and scavenging of oxide ore are combined to obtain the final oxide copper-cobalt flotation concentrate.

[0250] 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.

[0251] Table 2 Magnetic flotation separation test index of a sulfur-oxygen copper-cobalt ore in Congo (DRC)

[0252]

[0253] From the test results in Table 2, it can be seen that the copper recovery rate in the magnetic separation copper-cobalt oxide concentrate is more than 35%, and the cobalt recovery rate is more than 40%, which has a very good recovery effect. Compared with the data of the copper-cobalt oxide flotation concentrate, it can be seen that most of the copper-cobalt oxide has been recovered through magnetic separation. The copper-cobalt sulfide flotation concentrate has a high grade and can obtain a flotation effect with a copper grade greater than 60%. The copper recovery rate in the total concentrate is more than 85%, and the cobalt recovery rate is more than 70%.

[0254] Example 3

[0255] 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 2.8% copper, about 0.32% cobalt, and the copper oxidation rate is 80.97%.

[0256] The beneficiation method of sulfur-oxygen mixed copper-cobalt ore provided in this embodiment is carried out according to the following steps:

[0257] (1) Grinding: The sulfur-oxygen mixed copper-cobalt ore is ground, the grinding water is clean water, and no reagents are added during the grinding process; the particle size content of the ore is ground to a fineness of -0.074 mm and the content is 65.23%; the slurry concentration is 35%.

[0258] (2) Magnetic separation: 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 rough sweeping separation using a vertical ring high gradient magnetic separator;

[0259] The detailed process of magnetic separation is as follows:

[0260] 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 0.2m 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;

[0261] 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 0.4m 3 / h, the obtained concentrate is magnetically separated copper-cobalt oxide concentrate, and the obtained tailings are fed into the strong magnetic separation process;

[0262] 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;

[0263] 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 0.3m 3 / h, the concentrate is returned to the strong magnetic roughing process, and the tailings obtained are magnetic separation tailings, which are fed to the sulfide ore flotation process in step (3).

[0264] The screening results of the magnetic tailings showed that the fineness of the magnetic tailings was -200 mesh, accounting for 67.79%. The copper oxide content in the magnetic concentrate was measured to be 14.52%, accounting for 98.57% of the total copper content, proving that the magnetic concentrate obtained was copper-cobalt oxide ore.

[0265] (3) Flotation of sulfide ore (copper-cobalt sulfide):

[0266] a. Roughing: Add 75 g / t of collector (butyl xanthate) to the magnetic tailings concentrated to a pulp concentration of 45%, 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 roughing concentrate and copper-cobalt sulfide roughing tailings;

[0267] b. Scavenging 1: add 30 g / t of collector (butyl xanthate) to the copper-cobalt sulfide roughing tailings, stir for 2 min, then add 5 g / t of frother (pine oil), stir for 1 min, 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 is subjected to a second scavenging;

[0268] c. Scavenging 2: add 30 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailing 1, stir for 2 min, add 2.5 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 tailing 2. The copper-cobalt sulfide scavenging concentrate 2 is returned to scavenging 1, and the copper-cobalt sulfide scavenging tailing 2 is scavenged for the third time;

[0269] d. Scavenging 3: adding 15 g / t of collector (butyl xanthate) to the copper-cobalt sulfide scavenging tailing 2, stirring for 2 min, adding 2.5 g / t of frother (pine oil), stirring for 1 min, and then aerating flotation to obtain copper-cobalt sulfide scavenging concentrate 3 and copper-cobalt sulfide scavenging tailing 3, the copper-cobalt sulfide scavenging concentrate 3 returns to scavenging 3, the copper-cobalt sulfide scavenging tailing 3 is the copper-cobalt sulfide flotation tailing, and is fed to the oxide ore flotation process of step (4);

[0270] e. Selection: Select four blank sections;

[0271] The copper-cobalt sulfide rougher concentrate is firstly concentrated 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 process;

[0272] The copper-cobalt sulfide concentrated ore 1 is subjected to a second concentration to obtain the copper-cobalt sulfide concentrated ore 2 and the copper-cobalt sulfide concentrated tailings 2; the copper-cobalt sulfide concentrated tailings 2 are returned to the first concentration process;

[0273] The copper-cobalt sulfide concentrated ore 2 is subjected to a third 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 concentration process;

[0274] The copper-cobalt sulfide concentrated concentrate 3 is subjected to the fourth 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. The copper-cobalt sulfide concentrated tailings 4 are returned to the third copper-cobalt sulfide concentration process.

[0275] (4) Flotation of oxide ore (copper and cobalt oxide):

[0276] a. Roughing: Add sulfiding agent (sodium hydrosulfide) 1000 g / t to the copper-cobalt sulfide flotation tailings of step (3), stir for 6 min, add collector (butyl xanthate) 75 g / t, stir for 2 min, add foaming agent (pine oil) 25 g / t, stir for 1 min, and then aerate for flotation to obtain copper oxide roughing concentrate 1 and copper oxide cobalt roughing tailings;

[0277] b. Scavenging 1: Add 400 g / t of sulfiding agent (sodium hydrosulfide) to the copper-cobalt oxide roughing tailings, stir for 5 minutes, then add 30 g / t of collector (butyl xanthate), stir for 2 minutes, then add 10 g / t of frother (pine oil), stir for 1 minute, then aerate for flotation to obtain copper-cobalt oxide scavenging concentrate 1 and copper-cobalt oxide scavenging tailings 1;

[0278] c. Scavenging 2, adding 400g / t of sulfiding agent (sodium hydrosulfide) to the copper-cobalt oxide scavenging tailings 1, stirring for 4 minutes, adding 30g / t of collector (butyl xanthate), stirring for 2 minutes, adding 10g / t of frother (pine oil), stirring for 1 minute, and then aerating for flotation to obtain copper-cobalt oxide scavenging concentrate 2 and copper-cobalt oxide scavenging tailings 2;

[0279] d. Scavenging 3, adding 200 g / t of sulfiding agent (sodium hydrosulfide) to the copper-cobalt oxide scavenging tailings 2, stirring for 4 minutes, adding 15 g / t of collector (butyl xanthate), stirring for 2 minutes, adding 5 g / t of frother (pine oil), stirring for 1 minute, and then aerating for flotation to obtain copper-cobalt oxide scavenging concentrate 3 and copper-cobalt oxide scavenging tailings 3;

[0280] e. Scavenging 4, add sulfiding agent (sodium hydrosulfide) 200g / t to the copper cobalt oxide scavenging tailings 3, stir for 4 minutes, add collector (butyl xanthate) 15g / t, stir for 2 minutes, add frother (pine oil) 5g / t, stir for 1 minute, and then aerate for flotation to obtain copper cobalt oxide scavenging concentrate 4 and copper cobalt oxide scavenging tailings 4 (i.e., final flotation tailings).

[0281] The concentrates from roughing and scavenging of oxide ore are combined to obtain the final oxide copper-cobalt flotation concentrate.

[0282] 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 3.

[0283] Table 3 Magnetic flotation separation test index of a sulfur-oxygen copper-cobalt ore in Congo (DRC)

[0284]

[0285] From the test results in Table 2, it can be seen that the copper recovery rate in the magnetic separation copper-cobalt oxide concentrate is more than 45%, and the cobalt recovery rate is more than 50%, which has a very good recovery effect. Compared with the data of the copper-cobalt oxide flotation concentrate, it can be seen that most of the copper-cobalt oxide has been recovered through magnetic separation. The copper-cobalt sulfide flotation concentrate has a high grade and can obtain a flotation effect with a copper grade greater than 60%. The copper recovery rate in the total concentrate is more than 80%, and the cobalt recovery rate is more than 75%.

[0286] 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 sulfur-oxygen mixed copper-cobalt ore, characterized in that: The following steps are involved: (1) Grinding: Grinding the sulfur-oxygen mixed copper-cobalt ore and preparing it into raw ore slurry; (2) Magnetic separation: The raw ore pulp is subjected to magnetic separation to obtain magnetic separation concentrate of copper and cobalt oxide and magnetic separation tailings; The magnetic separation 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 a copper-cobalt oxide magnetic separation concentrate; The magnetic field strength of the strong magnetic roughing process is above 0.9T; The magnetic field strength of the weak magnetic concentration process is 0.2-0.7T.

2. The beneficiation method of sulfur-oxygen mixed copper-cobalt ore according to claim 1, characterized in that: The copper grade of the sulfur-oxygen mixed copper-cobalt ore is 2.5wt%-4.0wt%, the cobalt grade is 0.2wt%-0.4wt%, and the oxidation rate is 30wt%-90wt%; the concentration of the raw ore slurry is 31wt%-35wt%; in step (1), the sulfur-oxygen mixed copper-cobalt ore is ground to a particle size content of -0.074mm with a fineness of 65wt%-70wt%; In step (2), the magnetic separation further comprises a strong magnetic fine sweeping process; the tailings obtained in the weak magnetic concentration process are fed into the strong magnetic fine sweeping process; the concentrate obtained in the strong magnetic fine sweeping process is returned to the weak magnetic concentration process; In step (2), the magnetic separation also includes a strong magnetic roughing separation process; the tailings obtained from the strong magnetic roughing separation process are fed into the strong magnetic roughing separation process; the tailings obtained from the strong magnetic fine sweeping separation process are fed into the strong magnetic roughing separation process; the concentrate obtained from the strong magnetic roughing separation process is returned to the strong magnetic roughing separation process; the tailings obtained from the strong magnetic roughing separation process are magnetic separation tailings; In step (2), the strong magnetic roughing process: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-14Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h; In step (2), the magnetic field strength of the weak magnetic separation process is 0.4-0.6T, the pulsation frequency is 8-12Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h; In step (2), the strong magnetic fine sweeping process: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-14Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h; In step (2), the strong magnetic rough sweeping process: the magnetic field strength is 1.1-1.2T, the pulsation frequency is 8-14Hz, and the flow rate of the slurry in the magnetic field is 0.2-0.4m 3 / h; In step (2), the magnetic separation adopts a high gradient magnetic separator.

3. The beneficiation method of sulfur-oxygen mixed copper-cobalt ore according to claim 1 or 2, characterized in that: The method also includes copper-cobalt sulfide flotation: using the magnetic separation tailings as raw materials to carry out copper-cobalt sulfide flotation to obtain copper-cobalt sulfide flotation concentrate and copper-cobalt sulfide flotation tailings.

4. The beneficiation method of sulfur-oxygen mixed copper-cobalt ore according to claim 3, characterized in that: The magnetic tailings are concentrated to a pulp concentration of 40-45% before copper-cobalt sulfide flotation; 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; 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 of the copper-cobalt sulfide flotation, the amount of the collector is 70-120 g / t, and the amount of the frother is 10-30 g / t; In the scavenging process of the copper-cobalt sulfide flotation, the amount of the collector is 10-50 g / t, and the amount of the frother is 1-10 g / t; The concentrating process of the copper-cobalt sulfide flotation is blank concentrating; In the roughing process and scavenging process of the copper-cobalt sulfide flotation, the collector is stirred for 2-3 minutes after being added, and the frother is stirred for 1-1.5 minutes after being added.

5. The beneficiation method of sulfur-oxygen mixed copper-cobalt 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 method for beneficiating sulfur-oxygen mixed copper-cobalt 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 the copper-cobalt sulfide, the amount of the collector is 30-50 g / t, and the amount of the frother is 5-10 g / t; In the second stage of the flotation of the copper-cobalt sulfide, the amount of the collector is 30-50 g / t, and the amount of the frother is 1-10 g / t; In the third stage scavenging of the copper-cobalt sulfide flotation, the amount of collector used is 10-30 g / t, and the amount of frother used is 1-5 g / t.

7. The beneficiation method of sulfur-oxygen mixed copper-cobalt ore according to any one of claims 3 to 6, characterized in that: The method also includes copper-cobalt oxide flotation: using the copper-cobalt sulfide flotation tailings obtained from the copper-cobalt sulfide flotation as raw material, performing sulfide flotation to obtain copper-cobalt oxide flotation concentrate.

8. The beneficiation method of sulfur-oxygen mixed copper-cobalt ore according to claim 7, characterized in that: The sulfiding agent used in the flotation of copper cobalt oxide is sodium hydrosulfide; the collector used in the flotation of copper cobalt oxide is butyl xanthate; the frother used in the flotation of copper cobalt oxide is pine oil; The copper-cobalt oxide flotation comprises a roughing process and a scavenging process; The roughing tailings obtained from the roughing process of the copper-cobalt oxide flotation are fed into the scavenging process of the copper-cobalt oxide flotation; The concentrate obtained by the roughing process and scavenging process of the copper-cobalt oxide flotation is the copper-cobalt oxide flotation concentrate; In the roughing process and scavenging process of the copper-cobalt oxide flotation, the reagents are added in the following order: sulfiding agent, collecting agent, and frother; In the roughing process of the copper-cobalt oxide flotation, the dosage of the sulfiding agent is 600-1000 g / t, the dosage of the collector is 30-80 g / t, and the dosage of the frother is 10-25 g / t; In the scavenging process of the copper cobalt oxide flotation, the dosage of the sulfiding agent is 100-400 g / t, the dosage of the collector is 10-30 g / t, and the dosage of the frother is 1-10 g / t; In the roughing process of the copper-cobalt oxide flotation, the stirring after the addition of the sulfiding agent is 5-6 minutes, the stirring after the addition of the collector is 2-3 minutes, and the stirring after the addition of the frother is 1-1.5 minutes; In the scavenging process of the copper cobalt oxide flotation, the stirring time after the sulfiding agent is added is 4-5 minutes, the stirring time after the collector is added is 2-3 minutes, and the stirring time after the frother is added is 1-1.5 minutes.

9. The beneficiation method of sulfur-oxygen mixed copper-cobalt ore according to claim 7 or 8, characterized in that: The scavenging process of copper-cobalt oxide flotation includes more than two scavenging stages; the concentrate obtained in each scavenging stage is copper-cobalt oxide flotation concentrate; except for the last scavenging stage, the scavenging tailings obtained in other scavenging stages enter the next scavenging stage.

10. The beneficiation method of sulfur-oxygen mixed copper-cobalt ore according to claim 9, characterized in that: The roughing process of the copper-cobalt oxide flotation includes a first stage of roughing; the scavenging process of the copper-cobalt oxide flotation includes four stages of scavenging; In the first stage of the flotation of copper cobalt oxide, the dosage of the sulfiding agent is 300-400 g / t, the dosage of the collector is 15-30 g / t, and the dosage of the frother is 5-10 g / t; In the second stage of the flotation of copper cobalt oxide, the dosage of the sulfiding agent is 200-400 g / t, the dosage of the collector is 15-30 g / t, and the dosage of the frother is 1-10 g / t; In the third stage of the flotation of copper cobalt oxide, the dosage of the sulfiding agent is 100-200 g / t, the dosage of the collector is 10-15 g / t, and the dosage of the frother is 1-5 g / t; In the fourth stage of the flotation of copper cobalt oxide, the dosage of the sulfiding agent is 100-200 g / t, the dosage of the collector is 10-15 g / t, and the dosage of the frother is 1-5 g / t.

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