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Method for separating and extracting copper and cobalt-nickel in low-grade copper-cobalt oxide ore

An extraction method, copper oxide technology, applied in the direction of improving process efficiency, etc., can solve the problems of poor versatility, insufficient comprehensive utilization of resources, etc., and achieve the effects of reducing material costs, facilitating the circulation of materials, and fast leaching speed

Inactive Publication Date: 2009-11-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the poor versatility and insufficient comprehensive utilization of resources in the prior art, the present invention provides a low-investment, comprehensive utilization of resources, wide application range of minerals, simple process, low energy consumption, low production cost, and acid and water closed circuit circulation. Pollution, environmentally friendly, and adaptable to the separation and extraction of copper, cobalt and nickel in copper oxide cobalt ore for large-scale production

Method used

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  • Method for separating and extracting copper and cobalt-nickel in low-grade copper-cobalt oxide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1 heating ore leaching

[0058] A. Get the copper-cobalt ore slurry and pump it into the stirring reactor, and pump water and hydrochloric acid (more than 28% of HCl content) into water and hydrochloric acid (more than 28% of HCl content) respectively by liquid-solid ratio 4.0: 1, acid material (weight) ratio, heating, Stir to leach.

[0059] B. Control of leaching conditions: stirring and leaching for 1.0 hour at 50-60°C and 0.1MPa.

[0060] C. Filter and wash the residue.

[0061] The comprehensive leaching rates of valuable metals are: Cu 92.1%; Ni+Co 91.7%; Mg 95.2%; Fe 30.1%.

Embodiment 2

[0062] Embodiment 2 ore leaching at normal temperature

[0063] A. Take the -100 mesh slurry and pump it into the stirring reactor, pump water and hydrochloric acid (HCl content above 28%) respectively according to the liquid-solid ratio of 3.0:1, and the acid material (weight) ratio of 0.8 to 1.0:1, and stir and leaching .

[0064] B. Control of leaching conditions: stirring and leaching for 3.0 hours at room temperature and 0.1 MPa.

[0065] C. Filter and wash the residue.

[0066] The comprehensive leaching rates of valuable metals are: Cu 93.1%; Ni+Co 92.4%; Mg 94.5%; Fe 34.7%.

[0067] Copper-cobalt oxide ore is leached with hydrochloric acid. The main metal element contents (g / L) of the leachate are: Cu 7.87; Ni+Co 1.18; Mg+Ca 14.27 Fe 2.61; the acidity of the leachate is: H + 0.78mol / L. The following examples are based on this leachate.

Embodiment 3

[0068] Example 3 Normal Temperature Replacement Precipitated Copper

[0069] A. Adjustment of the pH value of the leachate: pump the leachate into the stirred reactor, stir at room temperature, slowly add the solid product produced by roasting at a uniform speed, so that the pH of the leachate rises to 1.0-1.5, stop feeding, and continue to stir for 0.5 hours; the pH of the solution continues To rise; to filter.

[0070] B. Reduction and precipitation extraction of copper powder: pump the adjustment solution into the stirring reactor, stir at room temperature, slowly and uniformly add reduced iron powder; according to the reduction chemical reaction metering of the amount of copper in the solution and the content of high-valent iron, the amount of iron powder added is 1.1 times the theoretical amount, the addition time is 2.0 hours, and the stirring reaction time is 2.5 hours.

[0071] C. Separation and extraction of copper powder: filter; collect the filtrate, and enter the ...

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Abstract

The invention provides a method for separating and extracting copper and cobalt-nickel in copper-cobalt oxide ore, which uses the copper-cobalt oxide ore as a raw material to extract an intermediate product of the copper and the cobalt-nickel by adopting process flows of crushing and grinding the ore into slurry, chloridizing and leaching the slurry by a wet method, reducing iron powder to extract copper powder, vulcanizing and depositing cobalt and nickel, concentrating, drying and hydrolyzing deposited mother solution at high temperature and the like. The method comprises main technical points that metallic elements in the copper-cobalt oxide ore are dissolved and leached by hydrochloric acid under normal pressure; copper in leaching liquor is reduced and deposited by a reducing agent; the cobalt and nickel are deposited by a vulcanizing agent to obtain the intermediate product; the mother solution is concentrated, dried and hydrolyzed at high temperature after the deposition of cobalt and nickel to obtain metal oxide containing iron, magnesium and the like; and hydrogen chloride is reclaimed to obtain hydrochloric acid which is used for wet chloridizing and leaching of ore slurry. The method comprehensively reclaims the copper, the cobalt-nickel and the like, and has the characteristics of high leaching rate of the copper and the cobalt-nickel, less energy consumption, low cost, closed circulation of chlorine (the hydrochloric acid), less investment of project engineering and the like. The whole process is concise, clean and environment-friendly. The method is particularly applicable to large-scale industrial production.

Description

technical field [0001] The invention relates to a process method for separating and extracting copper, cobalt and nickel from low-grade copper-cobalt oxide ore. Background technique [0002] Copper, cobalt, nickel, etc. are important non-ferrous metals, which occupy an extremely important position in the global economy. Copper, cobalt and nickel often coexist in earth minerals; they mostly exist as sulfides and oxides. Due to the different geographical environments, the total content of copper, cobalt and nickel, sulfide ore and oxide ore are different. The copper-cobalt deposits that are completely weathered under hot and humid conditions are mainly oxide ore minerals, and most of them are sulfide and oxide minerals. coexistence of minerals. [0003] At present, there are three methods for processing copper-cobalt oxide ore: (1) flotation method; using fatty acid, amine organic matter or neutral oil emulsion and other flotation drugs to carry out direct flotation of miner...

Claims

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Application Information

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IPC IPC(8): C22B3/10C22B3/22C22B3/46C22B15/00C22B23/00
CPCY02P10/20
Inventor 胡启阳李新海王志兴郭华军
Owner CENT SOUTH UNIV
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