A combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with fluctuating oxidation rate

Abstract

The present invention provides a combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation, comprising: crushing the raw ore, grinding and classifying to prepare ore pulp; reverse flotation of the ore pulp to obtain carbonaceous materials and reverse flotation tailings; reverse flotation tailings are subjected to positive flotation to obtain copper sulfide concentrate, copper oxide concentrate, first cobalt concentrate and flotation tailings; mixed and magnetically separated carbonaceous materials and flotation tailings to obtain second cobalt concentrate and first final tailings; roasted and water-quenched copper sulfide concentrate to obtain first high-copper rich liquid and water-quenched slag dense underflow; stirred leaching water-quenched slag dense underflow, copper oxide concentrate, first cobalt concentrate and second cobalt concentrate to obtain second high-copper rich liquid and post-leaching dense underflow; CCD countercurrent washing post-leaching dense underflow to obtain low-copper rich liquid and CCD countercurrent washing underflow, leaching slag concentrate and second final tailings. The process has the advantages of clear structure, easy operation and control, stable and reliable process, and can recover copper and cobalt resources as much as possible, improve enterprise benefits, etc.

Description

Technical Field

[0001] The invention relates to the technical field of mineral extraction, and in particular to a combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with fluctuating oxidation rates. Background Art

[0002] Minerals are non-renewable resources. Excessive mining has led to the gradual depletion of high-quality resources and the difficulty of mining has become increasingly greater. Not only has the grade of the ore decreased, but the difficulty of smelting has also gradually increased. In particular, copper-cobalt mixed ores with fluctuating oxidation rates are difficult to select.

[0003] At present, the main beneficiation processes for treating copper-cobalt mixed ores with fluctuating oxidation rates are flotation and wet leaching of raw ore. The flotation process utilizes the differences in the physical and chemical properties of the surfaces of copper-cobalt ore and other gangue minerals, adds flotation agents, and uses a flotation machine to select copper-cobalt ore particles. The wet leaching process of raw ore is a process in which the raw copper-cobalt mixed ore with fluctuating oxidation rates is directly immersed in a solvent, and the different solubilities of various components in the solvent are utilized to dissolve copper and cobalt metals into the solution under specific conditions. This process is also relatively common.

[0004] The flotation process is generally suitable for copper-cobalt mixed ores containing carbonate minerals and low iron oxides, but the recovery rate of copper and cobalt is insufficient. The wet leaching process of raw ore directly leach the raw ore to recover copper and cobalt. Although the processing volume is large, the high content of carbonate gangue in the copper-cobalt mixed ore leads to high acid consumption, low leaching rate, high copper and cobalt grades in the leached residue, low copper and cobalt recovery rate, and greater difficulty in on-site process control and high cost. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a method for improving the recovery rate of copper-cobalt mixed ore with fluctuating oxidation rates, aiming to solve the technical problem that the prior art lacks a process that can effectively recover copper-cobalt mixed ore with fluctuating oxidation rates and achieve a reasonable recovery rate.

[0006] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0007] A combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with fluctuating oxidation rate comprises the following steps:

[0008] The copper-cobalt mixed ore with fluctuating oxidation rate is crushed, ground and classified to produce slurry;

[0009] The slurry is subjected to reverse flotation to obtain carbonaceous materials and reverse flotation tailings;

[0010] The reverse flotation tailings are subjected to positive flotation to obtain copper sulfide concentrate, copper oxide concentrate, first cobalt concentrate and flotation tailings;

[0011] Mixing and magnetically separating the carbonaceous material and the flotation tailings to obtain a second cobalt concentrate and a first final tailings;

[0012] Roasting and water-quenching the copper sulfide concentrate to obtain water-quenched slag, and concentrating the water-quenched slag to obtain a first high-copper rich solution and a water-quenched slag concentrated underflow;

[0013] Stirring and leaching the water-quenched slag dense underflow, the copper oxide concentrate, the first cobalt concentrate and the second cobalt concentrate to obtain a second high-copper rich solution and a post-leaching dense underflow;

[0014] The post-leaching concentrated underflow is washed by CCD countercurrent to obtain low-copper rich solution and CCD countercurrent washing underflow, and the CCD countercurrent washing underflow is positively floated to obtain leaching slag concentrate and the second final tailings.

[0015] Furthermore, after the step of crushing, grinding and classifying the copper-cobalt mixed ore with fluctuating oxidation rate to obtain ore pulp, the method further comprises:

[0016] The slurry is screened to separate waste residue from the slurry.

[0017] Furthermore, the proportion of particles with a particle size less than 0.074 mm in the slurry is 65% to 75%.

[0018] Furthermore, the forward flotation and reverse flotation tailings to obtain copper sulfide concentrate, copper oxide concentrate, first cobalt concentrate and flotation tailings include:

[0019] The reverse flotation tailings are mixed with a first flotation agent, and the reverse flotation tailings are subjected to positive flotation to obtain the copper sulfide concentrate and the copper sulfide tailings;

[0020] The copper sulfide tailings are mixed with a second flotation agent, and the copper sulfide tailings are positively floated to obtain the copper oxide concentrate and the copper oxide tailings;

[0021] The copper oxide tailings are mixed with a third flotation agent, and the copper oxide tailings are positively floated to obtain the first cobalt concentrate and the flotation tailings.

[0022] Furthermore, the first flotation reagent includes xanthate and 2# oil.

[0023] Furthermore, the second flotation reagent includes sodium sulfide, xanthate and 2# oil.

[0024] Furthermore, the third flotation reagent includes sodium sulfide, xanthate and 2# oil.

[0025] Furthermore, the step of mixing and magnetically separating the carbonaceous material and the flotation tailings to obtain the second cobalt concentrate and the first final tailings comprises:

[0026] The carbonaceous material and the flotation tailings are mixed to obtain a material to be processed, and the material to be processed is subjected to weak magnetic impurity removal;

[0027] The material to be processed is subjected to strong magnetic roughing once, and strong magnetic concentrating twice to obtain the second cobalt concentrate and the first final tailings.

[0028] Furthermore, the magnetic field strength of the weak magnetic impurity removal is 0.07-0.09T, the magnetic field strength of the strong magnetic rough selection is 1.27-1.32T, and the magnetic field strength of the strong magnetic selection is 1.07-1.12T.

[0029] Furthermore, after the steps of washing the post-leaching concentrated underflow with the CCD countercurrent to obtain a low-copper rich solution and washing the underflow with the CCD countercurrent, and positively flotating the CCD countercurrent washing underflow to obtain a leached slag concentrate and a second final tailings, the method further comprises:

[0030] The leaching slag concentrate is mixed with the first flotation agent, and the leaching slag concentrate is positively floated to obtain the copper sulfide concentrate and the copper sulfide tailings.

[0031] Compared with the prior art, the beneficial effects of the present invention are: priority is given to slag and carbon removal, then step-by-step flotation of copper sulfide and copper oxide, flotation and magnetic separation of cobalt, pyrometallurgical smelting of copper sulfide concentrate followed by water quenching and stirring with copper oxide and cobalt concentrate, countercurrent washing of leached slag followed by leaching slag flotation, and obtaining high-copper rich liquid, low-copper rich liquid and final tailings. The process flow has a clear structure and is easy to operate and control in actual production. It has the advantages of stable and reliable process, reduced environmental pollution, easy production management and automation, and reduced labor intensity of workers. At the same time, it solves the problem of oxidation rate fluctuation and high oxidation rate. The process can recover as much copper and cobalt resources as possible, which is beneficial to improving the economic benefits of the enterprise, while reducing the impact of tailings on the environment. It has reference and reference significance for the design and transformation of copper-cobalt mixed ore beneficiation process flow with similar oxidation rate fluctuation or high oxidation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a flow chart of the combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation in the first embodiment of the present invention;

[0033] Figure 2 It is a flow chart of the combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation in the second embodiment of the present invention;

[0034] Figure 3 It is a process schematic diagram of a combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation in the second embodiment of the present invention;

[0035] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] See also Figure 1 The combined smelting method for improving the recovery rate of copper-cobalt mixed ore with fluctuating oxidation rate in the first embodiment of the present invention comprises the following steps:

[0040] Step S10: crushing, grinding and classifying the copper-cobalt mixed ore with fluctuating oxidation rate to produce ore pulp;

[0041] The copper-cobalt mixed ore with a copper grade of 2.81%, a cobalt grade of 0.24%, an oxidation rate of 85%, and a particle size of less than 500 mm with an oxidation rate fluctuation is coarsely crushed to a particle size of less than 200 mm, transported to an intermediate ore pile through a first belt, and then fed to a semi-autogenous mill through a second belt at the bottom of the intermediate ore pile, and fed to a linear vibrating screen through the discharge end of the semi-autogenous mill. The linear vibrating screen is used to separate coarse stubborn stones. Preferably, the aperture of the linear vibrating screen is 8x20 mm. The screen material of the linear vibrating screen is fed to a stubborn stone crusher through a third belt, and then returned to the semi-autogenous mill after crushing, and fed to the linear vibrating screen through the discharge end of the semi-autogenous mill to complete the operation cycle. The undersize material of the linear vibrating screen enters the pump pool, and after being graded by the hydrocyclone group, the sand is settled and enters the overflow ball mill. The discharge of the overflow ball mill is combined with the undersize material and stored in the pump pool. The hydrocyclone group and the overflow ball mill constitute a grinding closed circuit.

[0042] The hydrocyclone group is used to control the particle size of the slurry. It can be understood that after overflowing from the hydrocyclone group, the proportion of particles smaller than 0.074 mm in the slurry is 65% to 75%.

[0043] Step S20: performing reverse flotation on the slurry to obtain carbonaceous materials and reverse flotation tailings;

[0044] The ore pulp is sent to a pre-decarbonization reverse flotation device, and the ore pulp is reversely flotated, and the foam product produced is the carbonaceous material, and the sediment is the reverse flotation tailings.

[0045] Step S30: The reverse flotation tailings are subjected to forward flotation to obtain copper sulfide concentrate, copper oxide concentrate, first cobalt concentrate and flotation tailings;

[0046] Step S40: mixing and magnetically separating the carbonaceous material and the flotation tailings to obtain a second cobalt concentrate and a first final tailings;

[0047] Step S50: roasting and water-quenching the copper sulfide concentrate to obtain water-quenched slag, and concentrating the water-quenched slag to obtain a first high-copper rich solution and a water-quenched slag concentrated underflow;

[0048] Step S60: stirring and leaching the water-quenched slag dense underflow, the copper oxide concentrate, the first cobalt concentrate and the second cobalt concentrate to obtain a second high-copper rich solution and a post-leaching dense underflow;

[0049] Step S70: CCD countercurrent washing the post-leaching concentrated underflow to obtain low-copper rich solution and CCD countercurrent washing underflow, and positively flotation the CCD countercurrent washing underflow to obtain leaching slag concentrate and the second final tailings.

[0050] The first high-copper-rich liquid and the second high-copper-rich liquid flow by gravity into the high-copper-rich liquid clarifier, and are pumped to the smelting and extraction workshop after clarification for extraction. The low-copper-rich liquid flows by gravity into the low-copper-rich liquid clarifier, and is pumped to the smelting and extraction workshop after clarification for extraction.

[0051] The first final tailings and the second final tailings are combined and pumped to a tailings thickener, and after being thickened by the tailings thickener, they are pumped to a tailings pond for storage.

[0052] Through the above method, slag and carbon are removed first, and then copper sulfide and copper oxide are flotated step by step, cobalt is selected by flotation and magnetic separation, copper sulfide concentrate is quenched by pyrometallurgy, and then stirred and leached with copper oxide and cobalt concentrate, and the leached residue is countercurrently washed and then floated to obtain high-copper rich liquid, low-copper rich liquid and final tailings. The process flow has a clear structure and is easy to operate and control in actual production. It has the advantages of stable and reliable process, reduced environmental pollution, easy production management and automation, and reduced labor intensity of workers. At the same time, it solves the problem of oxidation rate fluctuation and high oxidation rate. The process can recover as much copper and cobalt resources as possible, which is conducive to improving the economic benefits of the enterprise, while reducing the impact of tailings on the environment. It has reference and reference significance for the design and transformation of copper-cobalt mixed ore beneficiation process flow with similar oxidation rate fluctuation or high oxidation rate.

[0053] See also Figure 2 and Figure 3 The combined smelting method for improving the recovery rate of copper-cobalt mixed ore with fluctuating oxidation rate in the second embodiment of the present invention comprises the following steps:

[0054] Step S100: crushing, grinding and classifying the copper-cobalt mixed ore with fluctuating oxidation rate to produce ore pulp;

[0055] Step S101: screening the ore pulp to separate waste slag from the ore pulp;

[0056] After the hydrocyclone group overflows, the slurry is screened and separated by a slag separation linear screen. The slag separation linear screen is used to separate the debris, wood chips, detonating cord, etc. brought by the mining process from the slurry. Preferably, the aperture of the slag separation linear screen is 2x15mm to protect various subsequent flotation devices.

[0057] Step S102: performing reverse flotation on the slurry to obtain carbonaceous materials and reverse flotation tailings;

[0058] Step S103: mixing the reverse flotation tailings with a first flotation agent, and performing positive flotation on the reverse flotation tailings to obtain the copper sulfide concentrate and the copper sulfide tailings;

[0059] Specifically, the first flotation reagent includes: butyrate and 2# oil. After the reverse flotation tailings are mixed with the first flotation reagent in a first stirring barrel, they enter a two-roughing and two-scavenging copper sulfide direct flotation device. The roughing concentrate is refined five times to obtain a copper sulfide concentrate containing 40.14% copper, 2.21% cobalt, a copper recovery rate of 57%, and a cobalt recovery rate of 36.75%.

[0060] Step S104: mixing the copper sulfide tailings with a second flotation agent, and positively flotating the copper sulfide tailings to obtain the copper oxide concentrate and the copper oxide tailings;

[0061] The second flotation reagent includes sodium sulfide, xanthate and 2# oil. After the copper sulfide tailings are mixed with the second flotation reagent in the second stirring barrel, they enter the two-roughing and two-scavenging copper oxide positive flotation device to obtain a copper oxide concentrate containing 16% copper, 1.45% cobalt, a copper recovery rate of 26%, and a cobalt recovery rate of 27.60%.

[0062] Step S105: mixing the copper oxide tailings with a third flotation agent, and performing positive flotation on the copper oxide tailings to obtain the first cobalt concentrate and the flotation tailings.

[0063] The third flotation reagent includes sodium sulfide, butyl xanthate and 2# oil. It can be understood that in order to improve the recovery rate of cobalt, the copper oxide tailings are mixed with the third flotation reagent in the third stirring barrel and enter the three-roughing and four-sweeping cobalt positive flotation device. The roughing concentrate is subjected to three cleanings to obtain cobalt concentrate.

[0064] Step S106: mixing the carbonaceous material and the flotation tailings to obtain a material to be processed, and performing weak magnetic impurity removal on the material to be processed;

[0065] Step S107: performing strong magnetic roughing separation on the object to be processed once, and performing strong magnetic concentrating on the object to be processed twice, so as to obtain the second cobalt concentrate and the first final tailings;

[0066] The first cobalt concentrate and the second cobalt concentrate are combined to obtain a cobalt concentrate containing 2.03% copper, 0.34% cobalt, 8% copper recovery rate, and 15.65% cobalt recovery rate. The magnetic separation tailings are the first final tailings. The total copper recovery rate in the above concentrates is 91%, and the total cobalt recovery rate is 80%. The magnetic field strength of the weak magnetic impurity removal is 0.07-0.09T, the magnetic field strength of the strong magnetic roughing is 1.27-1.32T, and the magnetic field strength of the strong magnetic concentration is 1.07-1.12T.

[0067] Step S108: roasting and water-quenching the copper sulfide concentrate to obtain water-quenched slag, and concentrating the water-quenched slag to obtain a first high-copper rich solution and a water-quenched slag concentrated underflow;

[0068] The copper sulfide concentrate is pumped to a copper sulfide concentrate thickener for concentration, and the overflow water is pumped to a return water tank for use as return water; the underflow of the copper sulfide concentrate thickener is pumped to a stirring tank before filter pressing, and after feeding slurry, it is pumped to a filter press for filter pressing, and the filter cake after filter pressing is sent to a concentrate batching workshop containing a roasting system via a fourth belt, and the filtrate is returned to the copper sulfide concentrate thickener.

[0069] The copper sulfide concentrate is smelted and roasted by pyrometallurgy and then water-quenched to obtain water-quenched slag. After the water-quenched slag is concentrated, the overflow is the first high-copper rich liquid, and the underflow is the concentrated underflow of the water-quenched slag.

[0070] Step S109: stirring and leaching the water-quenched slag dense underflow, the copper oxide concentrate, the first cobalt concentrate and the second cobalt concentrate to obtain a second high-copper rich solution and a post-leaching dense underflow;

[0071] The water-quenched slag dense underflow is pumped to the water-quenched slag leaching tank, and the water-quenched slag dense underflow is leached with high acidity and high concentration. After the leaching is completed, it is pumped to the cobalt concentrate leaching tank.

[0072] The copper oxide concentrate is sent to a copper oxide concentrate thickener for concentration and dehydration, the first cobalt concentrate and the second cobalt concentrate are sent to a cobalt concentrate thickener for concentration and dehydration, the overflow water is pumped to a return water tank for use as return water, the underflow of the copper oxide ore thickener and the cobalt concentrate thickener is pumped to a corresponding slurry mixing tank, a mixed solution consisting of raffinate and concentrated sulfuric acid is added to the slurry mixing tank for slurry mixing, and after slurry mixing, it flows by gravity into a stirred leaching tank, and is pumped to a post-leaching thickener after leaching, and the overflow is the second high-copper rich solution and the post-leaching thickened underflow.

[0073] Step S110: CCD countercurrent washing the post-leaching concentrated underflow to obtain low-copper rich solution and CCD countercurrent washing underflow, and positively flotation the CCD countercurrent washing underflow to obtain leaching slag concentrate and the second final tailings;

[0074] The underflow of the post-leaching thickener is pumped to the first section of the CCD countercurrent washing thickener. After five-stage countercurrent washing, the CCD countercurrent washing thickener overflows to obtain the low-copper rich solution. The underflow of the fifth section of the CCD countercurrent washing thickener obtains the CCD countercurrent washing underflow. The copper oxide in the CCD countercurrent washing underflow has basically completely entered the solution during the leaching stage, and its copper content is mainly copper sulfide. The CCD countercurrent washing underflow is mixed with a fourth collector. Preferably, the fourth flotation agent includes butyric acid and 2# oil. The CCD countercurrent washing underflow is mixed with the fourth flotation agent in a fourth stirring barrel and enters a one-rough and two-sweep flotation device. The rougher concentrate is the leaching slag concentrate, and the scavenger tailings are the second final tailings. It can be understood that the copper content in the leaching slag concentrate is mainly copper sulfide.

[0075] Step S111: mixing the leached slag concentrate with the first flotation agent, and performing positive flotation on the leached slag concentrate to obtain the copper sulfide concentrate and the copper sulfide tailings.

[0076] In order to improve the recovery rate of copper and cobalt, the leached slag concentrate is mixed with the first flotation agent and enters a two-roughing and two-scavenging copper sulfide positive flotation device, and the above steps are repeated to complete secondary refining and recovery.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0078] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with fluctuating oxidation rate, characterized in that: The following steps are involved: The copper-cobalt mixed ore with fluctuating oxidation rate is crushed, ground and classified to produce slurry; The slurry is subjected to reverse flotation to obtain carbonaceous materials and reverse flotation tailings; The reverse flotation tailings are subjected to positive flotation to obtain copper sulfide concentrate, copper oxide concentrate, first cobalt concentrate and flotation tailings; The steps of performing forward flotation and reverse flotation tailings to obtain copper sulfide concentrate, copper oxide concentrate, first cobalt concentrate and flotation tailings include: The reverse flotation tailings are mixed with a first flotation agent, and the reverse flotation tailings are subjected to positive flotation to obtain the copper sulfide concentrate and the copper sulfide tailings; The copper sulfide tailings are mixed with a second flotation agent, and the copper sulfide tailings are positively floated to obtain the copper oxide concentrate and the copper oxide tailings; The copper oxide tailings are mixed with a third flotation agent, and the copper oxide tailings are positively floated to obtain the first cobalt concentrate and the flotation tailings; Mixing and magnetically separating the carbonaceous material and the flotation tailings to obtain a second cobalt concentrate and a first final tailings; Roasting and water-quenching the copper sulfide concentrate to obtain water-quenched slag, and concentrating the water-quenched slag to obtain a first high-copper rich solution and a water-quenched slag concentrated underflow; Stirring and leaching the water-quenched slag dense underflow, the copper oxide concentrate, the first cobalt concentrate and the second cobalt concentrate to obtain a second high-copper rich solution and a post-leaching dense underflow; CCD countercurrent washing of the post-leaching concentrated underflow to obtain low-copper rich solution and CCD countercurrent washing underflow, and positive flotation of the CCD countercurrent washing underflow to obtain leaching slag concentrate and the second final tailings; The leaching slag concentrate is mixed with the first flotation agent, and the leaching slag concentrate is positively floated to obtain the copper sulfide concentrate and the copper sulfide tailings.

2. The combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation according to claim 1 is characterized in that: After the step of crushing, grinding and classifying the copper-cobalt mixed ore with fluctuating oxidation rate to obtain ore pulp, the method further comprises: The slurry is screened to separate waste residue from the slurry.

3. The combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation according to claim 1 is characterized in that: The proportion of particles with a particle size less than 0.074 mm in the slurry is 65% to 75%.

4. The combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation according to claim 1 is characterized in that: The first flotation reagent includes xanthate and 2# oil.

5. The combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation according to claim 1, characterized in that: The second flotation reagent includes sodium sulfide, xanthate and 2# oil.

6. The combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation according to claim 1 is characterized in that: The third flotation reagent includes sodium sulfide, xanthate and 2# oil.

7. The combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation according to claim 1 is characterized in that: The step of mixing and magnetically separating the carbonaceous material and the flotation tailings to obtain the second cobalt concentrate and the first final tailings comprises: The carbonaceous material and the flotation tailings are mixed to obtain a material to be processed, and the material to be processed is subjected to weak magnetic impurity removal; The material to be processed is subjected to strong magnetic roughing once, and strong magnetic concentrating twice to obtain the second cobalt concentrate and the first final tailings.

8. The combined beneficiation and smelting method for improving the recovery rate of copper-cobalt mixed ore with oxidation rate fluctuation according to claim 7, characterized in that: The magnetic field strength of the weak magnetic impurity removal is 0.07-0.09T, the magnetic field strength of the strong magnetic rough selection is 1.27-1.32T, and the magnetic field strength of the strong magnetic selection is 1.07-1.12T.

Images