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 field of selective extraction of cobalt and nickel, can solve problems affecting recycling, achieve the effects of reducing pollution, realizing selective and efficient leaching at atmospheric pressure, and improving resource utilization

Pending Publication Date: 2021-09-21
NAT ELECTRIC POWER INVESTMENT GRP YELLOW RIVER UPSTREAM HYDROPOWER DEV CO LTD +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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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, which can not only solve the problem that metal impurities in the nickel sulfide concentrate leachate affect nickel and nickel The recycling of cobalt element can also further utilize other metal elements in the process of preparing nickel 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

[0116] Embodiment 1: the preparation of nickel sulfide concentrate leachate

[0117] 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.

[0118] 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.

[0119] (1) Investigate the effect of fine grinding particle size on the preparation of nickel sulfide concentrate leaching solution

[0120] Wherein, the condition of selective reaction is: the ...

Embodiment 2

[0147] Embodiment 2: Removal of iron ions in nickel sulfide concentrate leachate

[0148] Step 1. Place the nickel sulfide concentrate leachate obtained under the optimized process conditions of Example 1 in a reactor and heat it to 60° C. with a constant temperature water bath and adjust the pH value of the leachate to 1.2, and then pour the leachate into the leachate An oxidizing agent is added to oxidize ferrous ions in the leaching solution to ferric ions to form a first solution.

[0149] Step 2. Use potassium ferricyanide to detect whether there are ferrous ions remaining in the first solution. If there are no ferrous ions, raise the temperature of the first solution to 90° C., and then add sodium carbonate The solution adjusts the pH value of the first solution to 1.8 to carry out a precipitation reaction, so that the iron ions in the first solution react to form a precipitate. After the reaction is completed, adjust the first solution to a predetermined end point pH va...

Embodiment 3

[0167] Embodiment 3: remove calcium ion and magnesium ion in nickel sulfide concentrate leachate

[0168] The second solution obtained under the optimized process conditions of Example 2, that is, the leaching solution from which iron ions have been removed, is placed in a constant temperature water bath and stirred, and sodium carbonate solution is added to make the second solution reach a predetermined pH value, and the Add sodium fluoride in the second solution as a precipitating agent, 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 the third solution of the liquid phase, that is, to remove The leaching solution of calcium and magnesium ions was removed.

[0169] (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.

[0170] Wherein, the selected reaction co...

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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; an oxidizing agent is added into the nickel sulfide concentrate leachate to generate precipitates containing iron ions, and therefore the iron ions in the leachate are removed through a sodium jarosite method; sodium fluoride is added as a precipitator 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 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 utilization, 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 disc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B1/00C22B3/08C22B3/38C22B3/44
CPCC22B3/08C22B3/44C22B23/005C22B1/00C22B23/043Y02P10/20
Inventor 蔡楠湛金李鹏谈伟军魏国党电邦孙峙李青春郑晓洪曹宏斌
Owner NAT ELECTRIC POWER INVESTMENT GRP YELLOW RIVER UPSTREAM HYDROPOWER DEV CO LTD
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