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

A low-grade and complex technology, applied in the direction of improving process efficiency, can solve the problems of insufficient comprehensive utilization of resources and weak versatility, and achieve the effects of complete solution, cost saving and high leaching rate.

Active Publication Date: 2009-11-11
福建常青新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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. The method for separating and extracting copper, cobalt and nickel from low-grade complex mixed copper-cobalt ore that is polluting, environmentally friendly and adaptable to large-scale production

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1 heating ore leaching

[0060] A. Take the copper-cobalt ore slurry and pump it into the stirred reactor, the ratio of liquid to solid is 4.0:1, the ratio of acid to material (weight) is 1.2~1.4:1, and the ratio of salt (solid ferric chloride hexahydrate) to material is 0.28~ 0.30:1 Add hydrochloric acid (HCl content above 28%), solid ferric chloride hexahydrate, add water; heat, stir and leaching.

[0061] B. Control of leaching conditions: stirring and leaching for 1.0 hour at 60-70°C and 0.1MPa.

[0062] C. Filter and wash the residue.

[0063] The comprehensive leaching rates of valuable metals are: Cu 94.7%; Co+Ni 92.7%; Mg 96.2%; Fe42.7%.

Embodiment 2

[0064] Embodiment 2 ore leaching at normal temperature

[0065] A. Take -100 mesh slurry and pump it into the stirred reactor, according to the liquid-solid ratio of 3.0:1, the ratio of acid to material (weight) is 0.8 to 1.0:1, and the salt (solid ferric chloride hexahydrate + magnesium chloride hexahydrate) material The ratio is 0.35-0.38: 1. Add hydrochloric acid (HCl content above 28%), solid ferric chloride hexahydrate, and add water; carry out stirring and leaching.

[0066] B. Control of leaching conditions: stirring and leaching for 3.0 hours at room temperature and 0.1 MPa.

[0067] C. Filter and wash the residue.

[0068] The comprehensive leaching rates of valuable metals are: Cu 93.7%; Co+Ni 93.1%; Mg 95.4%; Fe31.6%.

[0069] The mixed copper-cobalt ore is leached with a salt mixed leaching agent. The main metal element contents (g / L) of the leachate are: Cu8.70; Ni+Co 2.62; Mg+Ca 8.47 Fe 21.01; the acidity of the leachate is: H + 0.72mol / L. The following exam...

Embodiment 3

[0070] Example 3 Normal Temperature Replacement Precipitated Copper

[0071] A. Adjustment of the pH value of the leachate: pump the leachate into the stirring reactor, stir at room temperature, slowly add the water leaching residue of the roasted solid product at a uniform speed, so that the pH of the leachate rises to 1.0-1.5, stop feeding, and continue stirring for 0.5 hours; the pH of the solution Value continues to rise; filter.

[0072] 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.

[0073] C. Separation and extraction of copper powder: filter; collect the fi...

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Abstract

The invention provides a method for separating and extracting copper and cobalt-nickel in low-grade complex mixed copper-cobalt ore, which uses low-grade complex mixed copper-cobalt ore (sulfide and oxide) as a raw material to extract an intermediate product of the copper and cobalt-nickel by adopting process flows of crushing and grinding ore into slurry, leaching the slurry with acidic villaumite by a wet method, extracting copper powder by reduction and replacement, vulcanizing and depositing nickel (cobalt), concentrating, drying, baking and hydrolyzing deposited mother solution at low temperature and the like. The method comprises main technical points that metallic elements in the mixed copper-cobalt ore are dissolved and leached by the acidic villaumite 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, baked and hydrolyzed at low temperature after cobalt-nickel deposition to obtain metal oxide, metal oxychloride and hydrogen chloride containing iron, magnesium and the like; hydrogen chloride is reclaimed to obtain hydrochloric acid, and baked solid is leached into water to obtain chloride solution; and the hydrochloric acid and the chloride solution are used for 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 (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 method for extracting and separating copper, cobalt and nickel from low-grade complex mixed copper-cobalt ore and comprehensively utilizing valuable metals. 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. Mineral coexistence. [0003] For the treatment of low-grade mixed copper-cobalt ores, especially complex mixed copper with high content of silicon, iron and magnesium, there is no mature smelting process at home and abroa...

Claims

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Application Information

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IPC IPC(8): C22B3/10C22B3/46C22B15/00C22B23/00
CPCY02P10/20
Inventor 胡启阳李新海王志兴郭华军
Owner 福建常青新能源科技有限公司
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