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Method for selectively extracting cobalt and nickel from nickel sulfide concentrate

A technology of nickel sulfide refining and nickel sulfide, which is applied in the direction of nickel sulfate, cobalt sulfate, process efficiency improvement, etc., to achieve the effect of improving resource utilization, realizing selective and efficient leaching at atmospheric pressure, and reducing environmental pollution

Pending Publication Date: 2021-09-24
NAT ELECTRIC POWER INVESTMENT GRP YELLOW RIVER UPSTREAM HYDROPOWER DEV CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the above-mentioned prior art, the present invention provides a method for selectively extracting cobalt and nickel from nickel sulfide concentrate. The recycling problem can also further utilize other metal elements in the process of preparing nickel sulfate and cobalt sulfate to reduce its pollution to the environment

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  • Method for selectively extracting cobalt and nickel from nickel sulfide concentrate
  • Method for selectively extracting cobalt and nickel from nickel sulfide concentrate
  • Method for selectively extracting cobalt and nickel from nickel sulfide concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Embodiment 1: the preparation of nickel sulfide concentrate leachate

[0114] Step 1: mixing the nickel sulfide concentrate with water to form a nickel sulfide concentrate slurry with a concentration of 25%, and ball milling the nickel sulfide concentrate slurry to form an ultra-fine ground nickel sulfide concentrate.

[0115] Step 2, placing the ultra-finely ground nickel sulfide concentrate in a reaction furnace and adding sulfuric acid solution as a leaching solution, and feeding oxygen at a predetermined pressure into the leaching solution to leach the ultrafinely ground nickel sulfide Metal elements in the concentrate to obtain a nickel sulfide concentrate leaching solution, the metal elements at least include copper, iron, cobalt, nickel, magnesium and calcium elements.

[0116] (1) Investigate the effect of fine grinding particle size on the preparation of nickel sulfide concentrate leaching solution

[0117] Wherein, the condition of selective reaction is: the ...

Embodiment 2

[0143] Embodiment 2: remove copper ion and iron ion in nickel sulfide concentrate leachate

[0144] Step 1. Add hydrogen peroxide to the nickel sulfide concentrate leaching solution obtained under the optimized process conditions in Example 1 to oxidize ferrous ions in the leaching solution to ferric ions to form a first solution.

[0145] Step 2, adding phosphate to the first solution, so that the iron ions and copper ions in the first solution react respectively to form copper phosphate and iron phosphate precipitates, and after the reaction is completed, filter to obtain solid-phase copper phosphate respectively slag and iron phosphate slag, obtain the second solution of the liquid phase, that is, the leaching solution from which copper ions and iron ions have been removed; wherein, according to the amount that makes the iron ions and copper ions in the first solution completely precipitated, the phosphoric acid The excess coefficient of the amount of salt used is 1, the re...

Embodiment 3

[0155] Embodiment 3: remove calcium ion and magnesium ion in nickel sulfide concentrate leachate

[0156] The second solution obtained under the optimized process conditions of Example 2, that is, the leaching solution that has removed iron ions and copper ions, is placed in a constant temperature water bath and stirred, and sodium carbonate solution is added so that the second solution reaches a predetermined pH value , adding sodium fluoride to the second solution as a precipitant, the magnesium ions and calcium ions in the second solution react with sodium fluoride, and after the reaction is completed, solid-liquid separation is carried out to obtain a third solution of the liquid phase , that is, the leachate from which calcium and magnesium ions have been removed.

[0157] (1) Investigate the effect of the end point pH value on the removal of calcium ions and magnesium ions in the nickel sulfide concentrate leachate.

[0158] Wherein, the selected reaction conditions are...

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Abstract

The invention provides a method for selectively extracting cobalt and nickel from nickel sulfide concentrate. The method comprises the following steps: metal elements in the nickel sulfide concentrate are selectively leached through a superfine grinding-oxygen pressure leaching process to obtain nickel sulfide concentrate leachate, wherein the metal elements at least comprise copper, iron, cobalt, nickel, magnesium and calcium elements; phosphate is added into the nickel sulfide concentrate leachate to generate iron phosphate slag and phosphate slag precipitates so as to remove iron ions and copper ions in the leachate; sodium fluoride is added as a precipitant to carry out precipitation reaction so as to remove calcium ions and magnesium ions in the leachate; and cobalt ions and nickel ions are extracted and separated through an extraction process correspondingly to prepare a cobalt sulfate product and a nickel sulfate product. According to the method, efficient recycling of the nickel element in the nickel sulfide concentrate is achieved, other metal elements are further utilized to reduce environmental pollution, and the resource utilization rate and the utilization value of raw materials are improved.

Description

technical field [0001] The invention belongs to the technical field of nickel sulfide concentrate treatment, in particular to a method for selectively extracting cobalt and nickel from nickel sulfide concentrate. Background technique [0002] Nickel is an important strategic metal resource, because of its good ductility, mechanical properties and chemical stability, it is widely used in aerospace, military and civil industries. In recent years, with the rapid development of the high-nickel ternary lithium battery industry, the market demand for nickel has increased rapidly. Among nickel mineral resources, polymetallic nickel sulfide concentrate is one of the most important nickel ore resources, and has a very important position in nickel resources in my country and the world. At present, nickel sulfide concentrate resources account for about 40% of the world's proven nickel ore resources. In recent years, super-large magmatic copper-nickel sulfide deposits have been discov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/22C22B3/38C22B3/44C22B15/00C22B23/00C22B1/00C01G51/10C01G53/10
CPCC22B3/08C22B3/44C22B3/22C22B23/005C22B15/0086C22B15/0071C22B1/00C01G53/10C01G51/10Y02P10/20
Inventor 孙峙蔡楠李青春魏国湛金李鹏谈伟军党电邦曹宏斌
Owner NAT ELECTRIC POWER INVESTMENT GRP YELLOW RIVER UPSTREAM HYDROPOWER DEV CO LTD
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