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Process for extracting nickel-cobalt from laterite by using resin-in-pulp adsorption technology

A resin adsorption and laterite ore technology, applied in the direction of improving process efficiency, can solve the problems of large filtration burden, unrecoverable nickel and cobalt, high sediment viscosity and difficult to wash, etc., to reduce equipment investment, reduce the burden of liquid-solid separation, treatment low cost effect

Active Publication Date: 2011-02-16
JILIN JIEN NICKEL IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By neutralizing and removing iron, the resulting precipitate has a high viscosity and is difficult to wash, and the filtration burden is huge
Despite the multi-stage washing method, there is still a large amount of nickel and cobalt mixed into the iron slag and cannot be recovered

Method used

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  • Process for extracting nickel-cobalt from laterite by using resin-in-pulp adsorption technology
  • Process for extracting nickel-cobalt from laterite by using resin-in-pulp adsorption technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] a. Take 2000g of laterite ore and crush it to -3mm, add 4000ml of water and grind it with a wet ball mill until the particle size is less than 0.074mm;

[0035] b. Pour the ore slurry after grinding into the autoclave, add 400ml of sulfuric acid solution with a concentration of 10%, stir and leaching for 2h at a temperature of 250°C and a pressure of 4Mpa;

[0036] c. Inject the leached pulp into the normal pressure reactor and add CaCO 3, adjust the pH of the solution to 2.5, and at the same time pass hot air into the blast to oxidize, stir and react for 3 hours, and the temperature is 95°C, so that iron is oxidized to ferric ion hydrolysis and precipitation, and the iron content in the solution after iron removal is less than 5mg / l;

[0037] d. The ore pulp after iron removal is injected into the adsorption tank, and after five-stage countercurrent resin adsorption, the loaded resin is fully extracted from the first-stage adsorption tank for 6 hours, and the subsequen...

Embodiment 2

[0044] a. Take 2000g of laterite ore and crush it to -3mm, add 6000ml of water and grind it with a wet ball mill until the particle size is less than 0.074mm;

[0045] b. The ore slurry after ore grinding is injected into the autoclave, and 500ml of sulfuric acid solution with a concentration of 12% is added, and the temperature is 200°C and the pressure is 3Mpa, and it is stirred and leached for 3h;

[0046] c. Inject the leached ore pulp into the normal-pressure reaction kettle, add CaO, adjust the pH of the solution to 2.0, and at the same time pass hot air into it to oxidize, stir and react for 3 hours, and the temperature is 95°C to oxidize iron into ferric ions and hydrolyze and precipitate. The iron content in the solution after iron removal is less than 5mg / l;

[0047] d. The ore pulp after iron removal is injected into the adsorption tank, and after six-stage countercurrent resin adsorption, the loaded resin is fully extracted from the first-stage adsorption tank for ...

Embodiment 3

[0054] a. Take 2000g of laterite ore and crush it to -3mm, add 8000ml of water and grind it with a wet ball mill until the particle size is less than 0.074mm;

[0055] b. The ore slurry after ore grinding is injected into the autoclave, and 600ml of sulfuric acid solution with a concentration of 15% is added, and the temperature is 300°C and the pressure is 5Mpa, and it is stirred and leached for 4h;

[0056] c. Inject the leached ore slurry into the normal pressure reactor, add Na 2 CO 3 , adjust the pH of the solution to 4.5, and at the same time pass hot air into the blast to oxidize, stir and react for 3 hours, and the temperature is 98°C, so that iron is oxidized to ferric ion hydrolysis and precipitation, and the iron content in the solution after iron removal is less than 5mg / l;

[0057] d. The ore pulp after iron removal is injected into the adsorption tank, and after seven-stage countercurrent resin adsorption, the loaded resin is fully extracted from the first-stage...

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Abstract

The invention relates to a process for extracting nickel-cobalt from laterite by using resin-in-pulp adsorption technology. The process comprises the following steps of: milling the laterite, and adding sulfuric acid into the milled laterite to perform high-pressure leaching; pouring the ore pulp after the leaching into a reaction kettle for neutral impurity removal; directly pouring the ore pulpafter the impurity removal into an adsorption tank to perform resin adsorption; adopting multilevel counter current absorption to perform desorption on the loaded resin so as to obtain pure nickel and cobalt mixed solution; and performing extraction separation to obtain a nickel-cobalt product. The resin can be used repeatedly after regeneration, the damaged resin is less, the service life of theresin is long, the desorption of the loaded resin and the regeneration of a poor resin are performed at normal temperature and normal pressure and are simple and easy to operate without a pressure vessel and heat regeneration device, thereby saving energy resources and reducing equipment investment. The ore pulp after adsorption is uniformly neutralized to reduce the tailings treating cost. The process shortens the technological process, reduces the liquid-solid separation burden, and reduces a great number of washing and filtering process steps, thereby reducing the production energy consumption and reducing the production cost. The process is simple, and the recovery rate of nickel and cobalt is over 90 percent.

Description

Technical field: [0001] The invention relates to a non-ferrous metal hydrometallurgy technology, in particular to the extraction and recovery of nickel and cobalt from ore pulp by adopting a pulp resin adsorption technology after adopting wet high-pressure leaching of laterite ore. Background technique: [0002] About 30% of the global terrestrial nickel resources occur in sulfide ores, and 70% in laterite ores (nickel oxide ores). Currently only about 40% of global nickel production comes from laterite ores. With the acceleration of the development of laterite mine projects in the world in recent years, it is estimated that more than 50% of the global nickel production will come from laterite mines by 2012. Laterite ore has the characteristics of refractory mineral separation. Compared with nickel sulfide ore, laterite ore for smelting treatment has lower ore grade, higher smelting cost, and relatively poor development economy. [0003] The process of processing nickel ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B23/00C22B3/24
CPCY02P10/20
Inventor 李韧王学哲刘力勇袁凤艳刘丹丹曲海翠马忠诚张鸣昕项允丛
Owner JILIN JIEN NICKEL IND
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