Combined treatment method for copper-cobalt sulfide ore and cobalt oxide ore

Abstract

The invention provides a combined treatment method for copper-cobalt sulfide ore and cobalt oxide ore. The method comprises the following steps: mixing copper-cobalt sulfide ore with cobalt oxide ore to obtain a mixed ore material; the mixed mineral aggregate and a sulfur-fixing agent are mixed and roasted, and roasted sand is obtained; and mixing the roasted product with water and sulfuric acid, carrying out oxygen pressure leaching to obtain a leaching material, and carrying out solid-liquid separation to obtain a copper-cobalt leaching solution and leaching residues. According to the method, roasting and oxygen pressure leaching are combined for combined treatment of the copper-cobalt sulfide ore and the cobalt oxide ore, high-valence cobalt in the cobalt oxide ore can be reduced into low-valence cobalt which is easily dissolved in an acid solution through low-valence sulfide obtained through thermal decomposition of the copper-cobalt sulfide ore, the consumption of a reducing agent is reduced, the treatment cost is reduced, and the method is suitable for industrial production. According to the combined treatment method for the copper-cobalt sulfide ore and the cobalt oxide ore, sulfur dioxide is basically not generated in the roasting process, meanwhile, the leaching rate of copper and cobalt is remarkably increased by adopting an oxygen pressure leaching process, and the combined treatment method is low in production cost, small in environmental pollution and high in leaching rate of copper and cobalt.

Description

Technical Field

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

[0002] With the continuous mining of cobalt minerals, high-grade and easy-to-handle cobalt oxide ore resources are becoming increasingly scarce, and difficult-to-handle cobalt sulfide ores have become a hot topic of current research. Copper and cobalt, as associated resources, generally exist in the form of copper-cobalt sulfide ores. Copper-cobalt sulfide minerals are difficult to dissolve in sulfuric acid under normal pressure, so it is difficult to recover copper-cobalt sulfide minerals by direct leaching of the original ore alone, resulting in a low copper-cobalt leaching rate. At the same time, some copper-cobalt sulfide ores also contain a large amount of alkaline gangue minerals such as high-calcium and high-magnesium dolomite, which consumes a lot of acid during direct leaching and the production cost remains high. In addition, due to the low cobalt grade of the ore, the complex occurrence of minerals, and the extremely fine embedded particle size, it cannot be efficiently recovered.

[0003] In the process of copper-cobalt ore treatment, the "sulfuric acid roasting-normal pressure acid leaching" process is generally used to initially recover copper and cobalt. However, in the process of treating sulfide copper-cobalt concentrate, this process is affected by the changes in ore composition and the roasting operation level, and the leaching residue still contains a lot of copper and cobalt, resulting in a high copper and cobalt loss rate.

[0004] Chinese application CN 110229958 A discloses a method for gradient recovery of copper, cobalt and zinc by low-temperature roasting of sulfur concentrate, wherein the sulfur concentrate is roasted at low temperature and leached at both ends at normal pressure to obtain copper-cobalt liquid, which still belongs to the traditional sulfur concentrate "sulfurization roasting-normal pressure acid leaching" treatment process. Chinese application CN 113789441 A discloses a combined leaching process of cobalt-sulfur concentrate and cobalt hydroxide ore, wherein the cobalt-sulfur concentrate and cobalt hydroxide ore are jointly leached under high pressure, but there are problems such as low leaching rates of cobalt and copper metals.

[0005] Therefore, among the current treatment methods of copper-cobalt sulfide minerals, pyrometallurgy will produce a large amount of sulfur dioxide, with large environmental protection investment and prominent environmental pollution problems, as well as low yield of valuable metals; bioleaching is mostly used to treat low-grade raw materials; and the wet smelting process that combines roasting and wet atmospheric pressure leaching will also produce sulfur dioxide during the roasting process, and part of the cobalt is prone to generate high-priced cobalt during the roasting process, and the leaching rate of cobalt and copper metals is still not high. Summary of the invention

[0006] The main purpose of the present invention is to provide a method for the combined treatment of copper-cobalt sulfide ore and cobalt oxide ore to solve the problems of high production cost, great environmental pollution and low copper and cobalt leaching rates in the roasting process of copper-cobalt sulfide ore in the prior art.

[0007] In order to achieve the above-mentioned object, according to one aspect of the present invention, a method for jointly processing copper-cobalt sulfide ore and cobalt oxide ore is provided, comprising the following steps: step S1, mixing the copper-cobalt sulfide ore and the cobalt oxide ore to perform ore blending to obtain a mixed ore; step S2, mixing the mixed ore with a sulfur-fixing agent, and then roasting to obtain roasted sand; step S3, mixing the roasted sand with water and sulfuric acid, and then performing oxygen pressure leaching to obtain a leached material; step S4, performing solid-liquid separation on the leached material to obtain a copper-cobalt leaching solution and a leaching residue.

[0008] Furthermore, the weight ratio of the copper-cobalt sulfide ore to the cobalt oxide ore is 1:(1.5~3).

[0009] Further, in the copper-cobalt sulfide ore, the Cu content is 15-25wt.%, the Co content is 8-15wt.%, the Fe content is 6-15wt.%, the Mg content is 2-5.5wt.%, and the S content is 15-21wt.%; preferably, the particle size of the copper-cobalt sulfide ore is ≤0.15mm; and / or in the cobalt oxide ore, the Cu content is 0.5-2.5wt.%, the Co content is 8-16wt.%, the Fe content is 0.5-2.5wt.%, the Mg content is 0.2-1.3wt.%, and the S content is 0-0.4wt.%; preferably, the particle size of the cobalt oxide ore is ≤0.15mm.

[0010] Further, the weight ratio of Co in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:(1.5-4); and / or the weight ratio of S in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:(0.02-0.06).

[0011] Furthermore, the sulfur-fixing agent includes one or more of sodium carbonate, sodium sulfate and sodium chloride; and / or the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:(0.2~0.6).

[0012] Furthermore, the calcination temperature is 350-600°C, and the calcination time is 1-4 hours.

[0013] Furthermore, the acid-ore ratio of oxygen pressure leaching is 150~250kg / t, and the liquid-solid ratio is (3~8):1.

[0014] Furthermore, the oxygen partial pressure of the oxygen pressure leaching is 0.2-1.0 MPa; and / or the temperature of the oxygen pressure leaching is 180-240° C., and the time is 1-4 h.

[0015] Furthermore, when the weight percentage of S in the mixed ore is 4.0~5.5wt.%, the roasting temperature is 350~450℃; when the weight percentage of S in the mixed ore is greater than 5.5 wt.% and less than or equal to 8.5wt.%, the roasting temperature is greater than 450℃ and less than or equal to 600℃.

[0016] Furthermore, when the weight ratio of S in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:(0.02~0.04), the oxygen partial pressure of oxygen pressure leaching is 0.2~0.5MPa; when the weight ratio of S in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is less than 1:0.04 and greater than or equal to 1:0.06, the oxygen partial pressure of oxygen pressure leaching is greater than 0.5MPa and less than or equal to 1MPa.

[0017] By applying the technical solution of the present invention, roasting is combined with oxygen pressure leaching to carry out the joint treatment of copper-cobalt sulfide ore and cobalt oxide ore. By roasting, the sulfide in the copper-cobalt sulfide ore is converted into soluble sulfate, and the low-valent sulfide decomposed by thermal decomposition can reduce the high-valent cobalt in the cobalt oxide ore into low-valent cobalt that is easily soluble in acidic solution, which can reduce the consumption of solid sulfur reducing agent in the leaching process of treating cobalt oxide ore alone, thereby greatly reducing the treatment cost of copper-cobalt sulfide ore and cobalt oxide ore; because the sulfide is used in the cobalt reduction process, sulfur dioxide is basically not produced during the roasting process, thereby significantly reducing environmental pollution during the mineral processing process. At the same time, by adopting the oxygen pressure leaching process, the remaining sulfur in the roasted sand enters the slag or solution in the form of sulfate, and because the copper-cobalt sulfide ore and cobalt oxide ore have been jointly roasted in the aforementioned steps, the sulfate balance is better during the oxygen pressure leaching process, and no obvious excess sulfuric acid is produced, which can significantly improve the leaching rate of copper and cobalt and reduce the loss of copper and cobalt in the mineral raw materials. The method of the invention is a combined treatment method of copper-cobalt sulfide ore and cobalt oxide ore with low production cost, low environmental pollution and high copper and cobalt leaching rate, and the product has high added value and broad application prospects. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below in conjunction with the embodiments.

[0019] Terminology explanation:

[0020] Acid-ore ratio: the ratio of the total weight of acid used in the leaching process (in kg) to the weight of the material to be leached (in t).

[0021] Liquid-to-solid ratio: the ratio of the weight of liquid to the weight of solid material in the leaching process slurry.

[0022] As described in the background technology of the present invention, the existing technology has the problems of high production cost, great environmental pollution and low copper and cobalt leaching rate in the roasting process of copper-cobalt sulfide ore. In order to solve the above problems, in a typical embodiment of the present invention, a method for the joint treatment of copper-cobalt sulfide ore and cobalt oxide ore is provided, comprising the following steps: step S1, mixing the copper-cobalt sulfide ore with the cobalt oxide ore to carry out ore blending to obtain a mixed ore; step S2, mixing the mixed ore with a sulfur-fixing agent, and then roasting to obtain roasted sand; step S3, mixing the roasted sand with water and sulfuric acid, and then performing oxygen pressure leaching to obtain a leached material; step S4, performing solid-liquid separation on the leached material to obtain a copper-cobalt leaching solution and a leaching slag.

[0023] The present invention combines roasting with oxygen pressure leaching to carry out joint treatment of copper-cobalt sulfide ore and cobalt oxide ore, thereby realizing efficient extraction of copper and cobalt. After the copper-cobalt sulfide ore and the cobalt oxide ore are mixed, they are roasted. In the process of converting the sulfide in the copper-cobalt sulfide ore into soluble sulfate by roasting, the low-valent sulfide (roasting process product) decomposed by heat can reduce the high-valent cobalt in the cobalt oxide ore into low-valent cobalt that is easily soluble in acidic solution. In the above process, on the one hand, the copper-cobalt sulfide ore is used as a reducing agent to act on the cobalt oxide ore in a disguised manner, which can not only realize the efficient roasting of the valuable metals in the two minerals, but also reduce the consumption of the reducing agent (also called sulfur-fixing agent) required for the separate treatment of the cobalt oxide ore, thereby greatly reducing the treatment cost of the copper-cobalt sulfide ore and the cobalt oxide ore. On the other hand, by internally utilizing the sulfur in the copper-cobalt sulfide ore, sulfur dioxide is basically not generated during the roasting process, which solves the overflow problem of sulfur dioxide during the roasting process of the copper-cobalt sulfide ore, thereby significantly reducing the environmental pollution during the mineral processing process.

[0024] Then, the roasted sand obtained in the roasting process is added to the autoclave, and oxygen is introduced at the same time to treat the roasted sand by oxygen pressure leaching process, so that the remaining sulfur in the roasted sand enters the slag or solution in the form of sulfate, further avoiding the generation of sulfur dioxide. Compared with the atmospheric pressure leaching process, the oxygen pressure leaching process can further solve the problem of high copper and cobalt content in the leaching slag, and because the copper-cobalt sulfide ore and the cobalt oxide ore have been jointly roasted in the above steps, the sulfate balance is good during the oxygen pressure leaching process, and no obvious excess sulfuric acid will be produced. At the same time, the leaching rate of copper and cobalt is significantly improved, and the loss of copper and cobalt in the mineral raw materials is reduced. The generated iron sulfate (Fe2(SO4)3) with low reaction activity can also be used to inhibit the leaching of iron, reducing the pressure of the solution for iron removal and the loss of valuable metals. Finally, the leached material is separated into solid and liquid, which can be carried out by suction filtration, pressure filtration, bag filtration, etc., to obtain copper-cobalt leaching solution and leaching slag, wherein the main metal elements of the copper-cobalt leaching solution are copper and cobalt, and the main metal element of the leaching slag is iron. When the method of the present invention is used to treat copper-cobalt sulfide ore and cobalt oxide ore, the total copper leaching rate is ≥96%, the total cobalt leaching rate is ≥96%, and the total iron leaching rate is ≤1.8%.

[0025] In a preferred embodiment, the weight ratio of the copper-cobalt sulfide ore to the cobalt oxide ore is 1:(1.5-3). When the usage ratio of the copper-cobalt sulfide ore to the cobalt oxide ore is within the above range, it is beneficial to make the sulfide and the oxide contact and react more fully during the roasting process.

[0026] In a preferred embodiment, in the copper-cobalt sulfide ore, the Cu content is 15-25wt.%, the Co content is 8-15wt.%, the Fe content is 6-15wt.%, the Mg content is 2-5.5wt.%, and the S content is 15-21wt.%; preferably, the particle size of the copper-cobalt sulfide ore is ≤0.15mm; and / or in the cobalt oxide ore, the Cu content is 0.5-2.5wt.%, the Co content is 8-16wt.%, the Fe content is 0.5-2.5wt.%, the Mg content is 0.2-1.3wt.%, and the S content is 0-0.4wt.%; preferably, the particle size of the cobalt oxide ore is ≤0.15mm.

[0027] The high content of sulfur and the appropriate amount of copper and cobalt in the copper-cobalt sulfide ore can make the sulfur thermally decompose in the form of low-valent sulfides during the roasting process, and act as a reducing agent to reduce the high-valent cobalt in the cobalt oxide ore to a low-valent state, which is easy to acid leaching. At the same time, controlling the content of alkaline gangue minerals such as Ca and Mg in the cobalt oxide ore within a lower range can further reduce the impact on the acid leaching process and avoid increased acid consumption. The low iron content helps to inhibit its leaching in oxygen pressure leaching and reduce the pressure of iron removal in the solution. By limiting the composition of the two ores to the above range, it is not only possible to improve the metal recovery rate and reduce metal loss, but also to improve the chemical balance in the process, reduce energy consumption and cost, and achieve an environmentally friendly, economical and efficient combined treatment effect.

[0028] In a preferred embodiment, the weight ratio of Co in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:(1.5-4); and / or the weight ratio of S in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:(0.02-0.06). The above conditions can improve the desulfurization rate and the reduction efficiency of valuable metals, thereby further reducing the generation and overflow of sulfur dioxide during the roasting process, and reducing the amount of sulfur-fixing reducing agent used in the process of separate oxide leaching; at the same time, the leaching rate of copper-cobalt metals is further improved during oxygen pressure leaching of the roasted material, thereby reducing the overall production cost and improving economic benefits.

[0029] In order to make the sulfur-fixing agent (reducing agent / pro-oxidant) more fully promote the conversion of sulfide into soluble sulfate during the roasting process, and at the same time play a sulfur-fixing role (making it less likely to escape), in a preferred embodiment, the sulfur-fixing agent includes one or more of sodium carbonate, sodium sulfate and sodium chloride; and / or the weight ratio of copper cobalt sulfide ore to the sulfur-fixing agent is 1: (0.2~0.6). Moreover, compared with traditional additives, these types of compounds can fix sulfur and promote the efficient recovery of valuable metals while more effectively controlling the roasting temperature and reducing energy consumption during the roasting process. The amount of sulfur-fixing agent used within the above range can further improve the oxidation efficiency of sulfides, reduce sulfur dioxide emissions and environmental pollution, and can reduce costs by using low doses.

[0030] In order to promote the effective oxidation of sulfides, promote the reduction of cobalt in cobalt oxide ore, and improve the resource recovery rate, in a preferred embodiment, the roasting temperature is 350-600°C and the time is 1-4 hours. Under the above temperature and time conditions, efficient desulfurization and metal reduction can be achieved on the basis of low energy consumption, while reducing the increase in energy consumption and equipment loss caused by excessive temperature, further improving the completeness of the reaction, which is conducive to improving the metal recovery rate, reducing production costs, and achieving a dual improvement in environmental protection and economic benefits.

[0031] In a preferred embodiment, the acid-ore ratio of oxygen pressure leaching is 150-250 kg / t, and the liquid-solid ratio is (3-8):1; preferably, the oxygen pressure leaching is carried out under stirring, and the stirring speed is 700-900 r / min. That is, the ratio of the total weight of the acid solution used in the oxygen pressure leaching to the weight of the roasted sand to be leached is 150-250 kg / t. The above conditions can make the solid-liquid reaction in the leaching process more fully carried out and improve the dissolution rate of copper and cobalt.

[0032] In order to further accelerate the dissolution of copper and cobalt and improve the leaching efficiency, in a preferred embodiment, the oxygen partial pressure of oxygen pressure leaching is 0.2-1.0 MPa; and / or the temperature of oxygen pressure leaching is 180-240°C, and the time is 1-4 hours. By refining the leaching conditions within the above range, the leaching process can be more accurately controlled, the leaching rate of copper and cobalt can be improved, while the leaching of iron can be inhibited, the acid consumption and the burden of solution iron removal can be reduced, the excess sulfuric acid can be reduced, the production cost and environmental pressure can be reduced, the product purity and metal recovery efficiency can be improved, the process stability and economic feasibility can be improved, and the foundation for large-scale industrial application can be laid.

[0033] In order to improve the metal recovery rate, in a preferred embodiment, the roasting temperature is greater than the oxygen pressure leaching temperature, and the temperature difference is 150-400° C. Such a temperature difference can make the reduction reaction in the roasting process and the oxidation dissolution reaction in the oxygen pressure leaching process respectively proceed under the optimal conditions, so as to achieve the best coordination of the roasting process and the oxygen pressure leaching process in the joint treatment of copper-cobalt sulfide ore and copper-cobalt sulfide ore.

[0034] The synergistic effect of the preferred sulfur content and roasting conditions is conducive to achieving effective reduction of cobalt under different raw material conditions and improving the leaching rate of copper and cobalt. In a preferred embodiment, when the weight percentage of S in the mixed ore is 4.0-5.5wt.%, the roasting temperature is 350-450°C; when the weight percentage of S in the mixed ore is greater than 5.5 wt.%, less than or equal to 8.5wt.%, the roasting temperature is greater than 450°C and less than or equal to 600°C.

[0035] When the S in the mixed ore is in a higher range, a higher roasting temperature is preferably used. At this time, the sulfur in the copper-cobalt sulfide ore can be activated by a stronger thermal effect. The high sulfur content can provide sufficient low-valent sulfides as a reducing agent to promote the effective reduction of high-valent cobalt in the cobalt oxide ore and reduce the amount of reducing agent. At the same time, high-temperature roasting helps to make up for the insufficient oxidation power caused by the insufficient amount of cobalt oxide, promote the conversion of high-content S in the mixed ore, and achieve efficient leaching of cobalt and copper. At the same time, the leaching amount of iron is controlled, the balance of sulfate is maintained, and the complexity of subsequent treatment is reduced.

[0036] When the sulfur in the mixed ore is in a lower range, a lower roasting temperature is preferably used. At this time, due to the low sulfur content, only less heat is needed to activate the sulfur in the copper-cobalt sulfide ore, provide reduction power for the cobalt oxide ore, and improve the reduction efficiency of cobalt in the cobalt oxide ore. At the same time, a lower temperature can reduce the excessive volatilization of low-content sulfur, reduce energy consumption, control the rate of reduction reaction, and thus improve the recovery rate of cobalt and copper.

[0037] By accurately matching the S / Co ratio and the oxygen pressure leaching conditions, it is beneficial to achieve efficient conversion and metal recovery of copper-cobalt sulfide ore and cobalt oxide ore in the joint treatment process. In a preferred embodiment, when the weight ratio of S in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:(0.02~0.04), the oxygen partial pressure of oxygen pressure leaching is 0.2~0.5MPa; when the weight ratio of S in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is less than 1:0.04 and greater than or equal to 1:0.06, the oxygen partial pressure of oxygen pressure leaching is greater than 0.5MPa and less than or equal to 1MPa.

[0038] When the ratio of S to Co is high, it indicates that the sulfur in the copper-cobalt sulfide ore is sufficient to act as a reducing agent to reduce the high-valent cobalt in the cobalt oxide ore. However, due to the high S content and good sulfide stability, more intense oxygen pressure leaching conditions are required to promote the conversion of sulfur, strengthen the leaching process, and promote the full dissolution of copper-cobalt sulfide. A higher oxygen partial pressure can increase the reaction kinetics, promote the combination of metal ions in the mineral with sulfate, achieve a higher metal leaching rate, and maintain a good balance of sulfate in the solution, avoid excess sulfuric acid, and maintain the economy and environmental friendliness of the process.

[0039] When the ratio of S to Co is low, it indicates that the proportion of sulfides is small, and only milder oxygen pressure leaching conditions are required, which can effectively promote the leaching of copper and cobalt, while reducing unnecessary energy consumption and iron leaching, thereby reducing subsequent processing costs and improving metal recovery rate and purity.

[0040] Typically but not limiting, the weight ratio of the copper-cobalt sulfide ore to the cobalt oxide ore is 1:1.5, 1:1.8, 1:2.0, 1:2.2, 1:2.5, 1:2.8, 1:3 or a range consisting of any two of them.

[0041] Typically but not limiting, the weight ratio of Co in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:1.5, 1:2.0, 1:2.5, 1:3.0, 1:3.5, 1:4 or a range consisting of any two of them.

[0042] Typically but not limiting, the weight ratio of S in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:0.02, 1:0.03, 1:0.04, 1:0.05, 1:0.06 or a range consisting of any two of them.

[0043] Typically but not limiting, the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.2, 1:0.3, 1:0.4, 1:0.5, 1:0.6 or a range consisting of any two of them.

[0044] Typically but not limiting, the calcining temperature is 350°C, 400°C, 450°C, 500°C, 550°C, 600°C or a range consisting of any two of them.

[0045] Typically, but not limiting, the temperature of oxygen pressure leaching is 180°C, 190°C, 200°C, 210°C, 220°C, 230°C, 240°C or a range consisting of any two of them.

[0046] Typically, but not limiting, the oxygen partial pressure of oxygen pressure leaching is 0.2 MPa, 0.4 MPa, 0.6 MPa, 0.8 MPa, 1.0 MPa or a range consisting of any two of them.

[0047] The present application is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed in the present application.

[0048] Example 1

[0049] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein, in the copper-cobalt sulfide ore, the content of Cu is 20.72wt.%, the content of Co is 11.70wt.%, the content of Fe is 12.14wt.%, the content of Mg is 3.89wt.%, the content of S is 18.79wt.%, and the particle size is ≤0.15mm; in the cobalt oxide ore, in the weight percentage content, the content of Cu is 1.26wt.%, the content of Co is 13.81wt.%, the content of Fe is 1.82wt.%, the content of Mg is 0.65wt.%, the content of S is 0.20wt.%, and the particle size is ≤0.15mm; the method comprises the following steps:

[0050] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0051] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0052] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material;

[0053] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0054] Example 2

[0055] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0056] Step S1, mixing 100 g of copper-cobalt sulfide ore with 150 g of cobalt oxide ore (weight ratio of 1:1.5) to prepare a mixed ore;

[0057] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0058] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material;

[0059] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0060] Example 3

[0061] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0062] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0063] Step S2, mixing the mixed ore with 20g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.2), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0064] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material;

[0065] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0066] Example 4

[0067] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0068] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0069] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium sulfate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0070] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material;

[0071] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0072] Example 5

[0073] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0074] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0075] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 350°C, time is 2h) to obtain roasted sand;

[0076] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material;

[0077] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0078] Example 6

[0079] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0080] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0081] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 600°C, time is 2h) to obtain roasted sand;

[0082] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material;

[0083] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0084] Example 7

[0085] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0086] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0087] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 4h) to obtain roasted sand;

[0088] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material;

[0089] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0090] Example 8

[0091] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0092] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0093] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0094] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 150 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material;

[0095] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0096] Example 9

[0097] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0098] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0099] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0100] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 8:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material;

[0101] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0102] Example 10

[0103] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0104] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0105] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0106] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 240° C., and the time is 2 h) to obtain a leached material;

[0107] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0108] Embodiment 11

[0109] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0110] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0111] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0112] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 180° C., and the time is 2 h) to obtain a leached material;

[0113] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0114] Example 12

[0115] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0116] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0117] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0118] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 1.0 MPa; the temperature of oxygen pressure leaching is 180° C., and the time is 2 h) to obtain a leached material;

[0119] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0120] Embodiment 13

[0121] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0122] Step S1, mixing 100 g of copper-cobalt sulfide ore with 300 g of cobalt oxide ore (weight ratio of 1:3) to obtain a mixed ore;

[0123] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0124] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 180° C., and the time is 4 h) to obtain a leached material;

[0125] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0126] Embodiment 14

[0127] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein the components of the copper-cobalt sulfide ore and the cobalt oxide ore are the same as those in Example 1; the method comprises the following steps:

[0128] Step S1, mixing 100 g of copper-cobalt sulfide ore with 250 g of cobalt oxide ore to prepare a mixed ore;

[0129] Step S2, mixing the mixed ore with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasting (temperature is 500°C, time is 2h) to obtain roasted sand;

[0130] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 6:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.6 MPa; the temperature of oxygen pressure leaching is 210° C., and the time is 2 h) to obtain a leached material;

[0131] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0132] Embodiment 15

[0133] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein, in the copper-cobalt sulfide ore, the content of Cu is 15wt.%, the content of Co is 8wt.%, the content of Fe is 6wt.%, the content of Mg is 5.5wt.%, the content of S is 15wt.%, and the particle size is ≤0.15mm; in the cobalt oxide ore, in the weight percentage content, the content of Cu is 0.5wt.%, the content of Co is 8wt.%, the content of Fe is 0.5wt.%, the content of Mg is 1.3wt.%, the content of S is 0wt.%, and the particle size is ≤0.15mm; the method comprises the following steps:

[0134] Step S1, mixing 100 g of copper-cobalt sulfide ore with 250 g of cobalt oxide ore to prepare a mixed ore;

[0135] Step S2, mixing the mixed ore with 20g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.2), and then roasting (temperature is 350°C, time is 4h) to obtain roasted sand;

[0136] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 150 kg / t, and the liquid-solid ratio is 8:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.2 MPa; the temperature of oxygen pressure leaching is 180° C., and the time is 4 h) to obtain a leached material;

[0137] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0138] Example 16

[0139] A method for jointly treating a copper-cobalt sulfide ore and a cobalt oxide ore, wherein, in the copper-cobalt sulfide ore, the content of Cu is 25wt.%, the content of Co is 15wt.%, the content of Fe is 15wt.%, the content of Mg is 2wt.%, the content of S is 21wt.%, and the particle size is ≤0.15mm; in the cobalt oxide ore, in the weight percentage content, the content of Cu is 2.5wt.%, the content of Co is 16wt.%, the content of Fe is 2.5wt.%, the content of Mg is 0.2wt.%, the content of S is 0.4wt.%, and the particle size is ≤0.15mm; the method comprises the following steps:

[0140] Step S1, mixing 100 g of copper-cobalt sulfide ore with 250 g of cobalt oxide ore to prepare a mixed ore;

[0141] Step S2, mixing the mixed ore with 60g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.6), and then roasting (temperature is 600°C, time is 1h) to obtain roasted sand;

[0142] Step S3, mixing roasted sand with water and sulfuric acid (the acid-ore ratio is 250 kg / t, and the liquid-solid ratio is 3:1), and then performing oxygen pressure leaching under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 1.0 MPa; the temperature of oxygen pressure leaching is 240° C., and the time is 1 h) to obtain a leached material;

[0143] Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

[0144] Examples 17 to 20

[0145] The difference from Example 1 is that the weight percentage of S in the mixed ore and the roasting temperature are different, see Table 1 for details.

[0146] Examples 21 to 24

[0147] The difference from Example 1 is that the weight ratio of S in the copper-cobalt sulfide ore and Co in the cobalt oxide ore in the mixed ore and the oxygen partial pressure of oxygen pressure leaching are different, see Table 1 for details.

[0148] Comparative Example 1

[0149] The difference from Example 1 is that in step S1, 100 g of copper-cobalt sulfide ore and 400 g of cobalt oxide ore are mixed (weight ratio is 1:4) to perform ore blending to obtain a mixed ore material.

[0150] Comparative Example 2

[0151] The difference from Example 1 is that in step S1, 100 g of copper-cobalt sulfide ore and 100 g of cobalt oxide ore are mixed (weight ratio is 1:1) to perform ore blending to obtain a mixed ore material.

[0152] Comparative Example 3

[0153] The difference from Example 1 is that in step S2, the mixed ore is roasted (temperature is 500° C., time is 2 h) to obtain roasted sand.

[0154] Comparative Example 4

[0155] The difference from Example 1 is that in step S2, the mixed ore is mixed with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasted (temperature is 300°C, time is 2h) to obtain roasted sand.

[0156] Comparative Example 5

[0157] The difference from Example 1 is that in step S2, the mixed ore is mixed with 40g of a sulfur-fixing agent (sodium carbonate) (the weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:0.4), and then roasted (temperature is 500°C, time is 0.5h) to obtain roasted sand.

[0158] Comparative Example 6

[0159] The difference from Example 1 is that in step S3, the roasted sand is mixed with water and sulfuric acid (the acid-ore ratio is 120 kg / t, and the liquid-solid ratio is 5:1), and then oxygen pressure leaching is carried out under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material.

[0160] Comparative Example 7

[0161] The difference from Example 1 is that in step S3, the roasted sand is mixed with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 2:1), and then oxygen pressure leaching is carried out under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 2 h) to obtain a leached material.

[0162] Comparative Example 8

[0163] The difference from Example 1 is that in step S3, the roasted sand is mixed with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then oxygen pressure leaching is carried out under stirring (the stirring speed is 800 r / min, the oxygen partial pressure is 0.2 MPa; the temperature of oxygen pressure leaching is 150° C., and the time is 2 h) to obtain a leached material.

[0164] Comparative Example 9

[0165] The difference from Example 1 is that in step S3, the roasted sand is mixed with water and sulfuric acid (the acid-ore ratio is 200 kg / t, and the liquid-solid ratio is 5:1), and then oxygen pressure leaching is carried out under stirring (the stirring speed is 600 r / min, the oxygen partial pressure is 0.4 MPa; the temperature of oxygen pressure leaching is 200° C., and the time is 0.5 h) to obtain a leached material.

[0166] Comparative Example 10

[0167] The difference from Example 1 is that the mineral raw material only includes copper-cobalt sulfide ore.

[0168] Comparative Example 11

[0169] The difference from Example 1 is that the mineral raw material only includes cobalt oxide ore.

[0170] Comparative Example 12

[0171] The difference from Example 1 is that normal pressure leaching is adopted in step S3.

[0172] Results test:

[0173] The roasting desulfurization rates of the above embodiments and comparative examples were measured respectively; and the copper-cobalt leaching solutions in the above embodiments and comparative examples were measured to obtain the total copper leaching rate, the total cobalt leaching rate, and the total iron leaching rate of the copper-cobalt sulfide ore and the cobalt oxide ore; the results are shown in Table 2.

[0174] Roasting desulfurization rate: Use X-ray fluorescence spectrometry (other chemical analysis methods such as combustion method and titration method can also be used) to determine the sulfur content in mixed ore and roasted sand. Roasting desulfurization rate = (sulfur content of mixed ore - sulfur content of roasted sand) ÷ sulfur content of mixed ore.

[0175] Total leaching rate of copper, total leaching rate of cobalt and total leaching rate of iron: Atomic absorption spectrometry (other chemical analysis methods such as inductively coupled plasma mass spectrometry and X-ray fluorescence spectrometry may also be used) is used to determine the corresponding metal content in the mixed ore. Metal leaching rate = metal content in leachate ÷ metal content in mixed ore, or metal leaching rate = (metal content in mixed ore - metal content in leaching slag) ÷ metal content in mixed ore.

[0176] Table 1

[0177]

[0178] Note: “ / ” in the above table refers to the same as in Example 1.

[0179] Table 2

[0180]

[0181]

[0182] It should be noted that the increase in the acid-ore ratio in Comparative Example 7 can promote leaching, but the copper-cobalt leaching rate does not increase much. Instead, the acid consumption is increased, the cost is increased, and there is no benefit.

[0183] As can be seen from the above, compared with the comparative example, each embodiment of the present invention combines roasting with oxygen pressure leaching to carry out joint treatment of copper cobalt sulfide ore and cobalt oxide ore. By roasting, the sulfide in the copper cobalt sulfide ore is converted into soluble sulfate, and the low-valent sulfide decomposed by heat can reduce the high-valent cobalt in the cobalt oxide ore to low-valent cobalt that is easily soluble in acidic solution, which can reduce the consumption of solid sulfur reducing agent in the leaching process of treating cobalt oxide ore alone, thereby greatly reducing the treatment cost of copper cobalt sulfide ore and cobalt oxide ore; because the sulfide is used in the cobalt reduction process, sulfur dioxide is basically not produced during the roasting process, thereby significantly reducing environmental pollution during the mineral processing process. At the same time, by adopting the oxygen pressure leaching process, the remaining sulfur in the roasted sand enters the slag or solution in the form of sulfate, and because the copper cobalt sulfide ore and the cobalt oxide ore have been jointly roasted in the aforementioned steps, the sulfate balance is better during the oxygen pressure leaching process, and no obvious excess sulfuric acid is produced, which can significantly improve the leaching rate of copper and cobalt and reduce the loss of copper and cobalt in the mineral raw materials. The method of the present invention is a method for jointly treating copper-cobalt sulfide ore and cobalt oxide ore with low production cost, low environmental pollution and high copper and cobalt leaching rate, and the product has high added value and broad application prospects.

[0184] In addition, it can be seen that when each process parameter is within the preferred range of the present invention, the overall effect is better.

[0185] 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 the combined treatment of copper-cobalt sulfide ore and cobalt oxide ore, characterized in that: The following steps are involved: Step S1, mixing the copper-cobalt sulfide ore and the cobalt oxide ore to perform ore blending to obtain a mixed ore material; Step S2, mixing the mixed ore with a sulfur-fixing agent, and then roasting to obtain roasted sand; Step S3, mixing the roasted sand with water and sulfuric acid, and then performing oxygen pressure leaching to obtain a leached material; Step S4, separating the leached material into solid and liquid to obtain copper-cobalt leaching solution and leaching residue.

2. The method for combined treatment of copper-cobalt sulfide ore and cobalt oxide ore according to claim 1, characterized in that: The weight ratio of the copper-cobalt sulfide ore to the cobalt oxide ore is 1:(1.5-3).

3. The method for combined treatment of copper-cobalt sulfide ore and cobalt oxide ore according to claim 1 or 2, characterized in that: In terms of weight percentage, the copper-cobalt sulfide ore has a Cu content of 15-25wt.%, a Co content of 8-15wt.%, a Fe content of 6-15wt.%, a Mg content of 2-5.5wt.%, and a S content of 15-21wt.%; and / or a particle size of the copper-cobalt sulfide ore of ≤0.15mm; and / or In terms of weight percentage, the cobalt oxide ore has a Cu content of 0.5-2.5wt.%, a Co content of 8-16wt.%, a Fe content of 0.5-2.5wt.%, a Mg content of 0.2-1.3wt.%, and a S content of 0-0.4wt.%; and / or a particle size of the cobalt oxide ore of ≤0.15mm.

4. The method for combined treatment of copper-cobalt sulfide ore and cobalt oxide ore according to claim 1 or 2, characterized in that: The weight ratio of Co in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:(1.5-4); and / or The weight ratio of S in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:(0.02-0.06).

5. The method for combined treatment of copper-cobalt sulfide ore and cobalt oxide ore according to claim 1 or 2, characterized in that: The sulfur-fixing agent includes one or more of sodium carbonate, sodium sulfate and sodium chloride; and / or The weight ratio of the copper-cobalt sulfide ore to the sulfur-fixing agent is 1:(0.2-0.6).

6. The method for combined treatment of copper-cobalt sulfide ore and cobalt oxide ore according to claim 1 or 2, characterized in that: The calcination temperature is 350-600° C. and the calcination time is 1-4 hours.

7. The method for combined treatment of copper-cobalt sulfide ore and cobalt oxide ore according to claim 1 or 2, characterized in that: The acid-ore ratio of the oxygen pressure leaching is 150-250 kg / t, and the liquid-solid ratio is (3-8):

1.

8. The method for combined treatment of copper-cobalt sulfide ore and cobalt oxide ore according to claim 1 or 2, characterized in that: The oxygen partial pressure of the oxygen pressure leaching is 0.2-1.0 MPa; and / or The temperature of the oxygen pressure leaching is 180-240° C., and the time is 1-4 hours.

9. The method for combined treatment of copper-cobalt sulfide ore and cobalt oxide ore according to claim 1 or 2, characterized in that: When the weight percentage of S in the mixed ore is 4.0-5.5wt.%, the calcination temperature is 350-450°C; When the weight percentage of S in the mixed ore is greater than 5.5 wt.%, and less than or equal to 8.5 wt.%, the roasting temperature is greater than 450°C and less than or equal to 600°C.

10. The method for combined treatment of copper-cobalt sulfide ore and cobalt oxide ore according to claim 1 or 2, characterized in that: When the weight ratio of S in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is 1:(0.02-0.04), the oxygen partial pressure of the oxygen pressure leaching is 0.2-0.5 MPa; When the weight ratio of S in the copper-cobalt sulfide ore to Co in the cobalt oxide ore is less than 1:0.04 and greater than or equal to 1:0.06, the oxygen partial pressure of the oxygen pressure leaching is greater than 0.5 MPa and less than or equal to 1 MPa.

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