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A kind of method that extracts cobalt nickel from laterite nickel ore

A laterite nickel ore, nickel-cobalt technology, applied in the smelting process field of laterite nickel ore wet extraction of cobalt and nickel, can solve the problems of multiple chemical materials, increase processing procedures and equipment, and have no advantages, and achieve simple operation and water reduction The effect of high consumption and recovery rate

Active Publication Date: 2011-12-07
广西银亿新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] But in above-mentioned method all is that laterite nickel ore is first processed through acid leaching and then uses ion-exchange resin to reclaim nickel-cobalt. ) method to directly add ion exchange resin to the leached pulp to adsorb nickel and cobalt, the leachate must first be purified and removed, and then the appropriate pH value can be adjusted before the ion exchange resin can be used to adsorb nickel and cobalt, which increases Many processing procedures and equipment and consume more chemical materials, there is not much advantage compared with the usual method

Method used

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  • A kind of method that extracts cobalt nickel from laterite nickel ore
  • A kind of method that extracts cobalt nickel from laterite nickel ore
  • A kind of method that extracts cobalt nickel from laterite nickel ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0052] A limonite-type lateritic nickel ore, the dry ore is ground to a particle size of -100 mesh, and the main components in the ore are as follows through analysis and testing:

[0053]

[0054] Stoichiometric sulfuric acid consumption is calculated as follows:

[0055]

[0056] Do the test according to the following scheme: weigh 100 grams of 4 parts of the above mineral powder and 4 parts containing 80 grams of H 2 SO 4 After the concentrated sulfuric acid is mixed evenly, put the paste into a ceramic boat, put it into a tube-type electric furnace with a diameter of φ60mm and roast it twice, and then heat up to the temperature required for the second roasting after the first roasting is completed. In the second roasting process, 50%Vol.SO was introduced at a flow rate of 2 liters / minute 2 SO 2 The mixed gas with air, the roasting conditions are shown in the table below:

[0057]

[0058] After the above roasted materials are cooled and finely ground, put them...

Embodiment 5

[0061] Put 500g of roasted limonite-type laterite nickel mineral material (ground to -200 mesh particle size) into a small stirring tank, add water and stir to make a slurry, adjust it into a slurry with a solid content of 10%, and test the material according to the analysis Add 1.5 grams of sodium sulfide to 1.5 times the copper content (molar mass) and about 4 grams of sodium sulfite. The amount of sodium sulfite added is based on the qualitative detection of the absence of ferric ions in the pulp. Then adjust the pH value of the pulp to 2.0, add 800 grams of pretreated Dowex M4195 resin to the pulp, stir and mix gently at room temperature, stop leaching after the reaction lasts for 1 hour, and use a 50-mesh stainless steel screen of American Standard to remove the pulp from the pulp Sieve out the resin, wash the mud attached to the resin with water, put the resin into the exchange column and use 1mol / L H 2 SO 4 The concentration of sulfuric acid solution to elute the depos...

Embodiment 6

[0065] Add 300g of roasted limonite-type laterite nickel mineral material to make a slurry with a solid content of 30%. At this time, the pH of the slurry is about 2.1. Adjust the pH to 3.0 with lye, stir for 30 minutes, and then add 400mL of wet WP-2 resin with a particle size of 350-650μm, stirred and mixed gently for 3 hours, separated the resin from the pulp with a 50-mesh screen, washed the pulp on the resin with water, and used 1.6 liters of 60g / L resin first The hydrochloric acid solution of HCl was used to wash off the nickel and cobalt, and then the resin was washed with 1.6 liters of water. The residual slurry after adsorption, the obtained eluent, and its components are shown in the table below.

[0066]

[0067] It can be seen from the data in the table that the rate of recovery of nickel and cobalt is higher, and the rate of recovery of iron and magnesium is very small. The small rate of recovery of iron here is not entirely the cause of the resin. Most of the r...

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Abstract

The invention discloses a method for extracting cobalt and nickel from laterite-nickel ore, which comprises the following steps of: performing roasting preprocessing on the laterite-nickel ore; blending the roasted material with water to obtain pulp; directly adding ion exchange resin for leaching and adsorbing the nickel and cobalt; separating the ion exchange resin from the ore pulp; eluting the nickel and cobalt in the resin by using acid; and separating nickel from cobalt in eluent by using a solvent extraction method, wherein the obtained nickel-containing solution and cobalt-containing solution are directly electrolyzed for producing metal nickel and metal cobalt, or producing corresponding salts of nickel and cobalt. By the method, a melting process for recovering cobalt and nickelfrom laterite-nickel ore through a wet process is simplified, a plurality of flows such as leaching, impurity removal, enrichment and the like of the nickel and cobalt of the laterite-nickel ore are integrated in a procedure, steps of solid-liquid separation and slag washing are not needed, water consumption, ore pulp treatment capacity and subsequent wastewater treatment capacity are reduced, the recovery rate of the nickel and cobalt in the process is high, the method is easy to implement, equipment investment cost can be saved, and chemical material consumption and multiple operation management links can be reduced.

Description

technical field [0001] The invention relates to a hydrometallurgical smelting method, in particular to a smelting process for extracting cobalt and nickel from laterite nickel ore by wet method. Background technique [0002] There are two types of nickel resources with mining value on the earth, one is sulfide ore type, and the other is oxide ore type. The distribution of nickel resources is dominated by oxidized ore types, which mainly exist in laterite nickel ore. Due to the mature extraction technology of sulfide ore, most of the nickel obtained through extraction metallurgy today comes from sulfide ore. However, there are not many sulfide mineral resources that can be exploited on the earth. In addition, the exploration cycle and construction cycle of sulfide mineral resources are relatively long, so it is relatively difficult to develop and utilize them. However, the laterite nickel ore has abundant reserves, low mining cost, and the ore source is close to the sea, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/06C22B3/04C22B3/20C22B23/00
Inventor 余小宁王多冬王亚秦和润秀覃春利李海燕施贵添
Owner 广西银亿新材料有限公司
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