A kind of preparation method of high nickel low acid low sodium nickel sulfate solution
A technology of nickel sulfate and high nickel, applied in the direction of nickel sulfate, process efficiency improvement, etc., can solve the problems of too much residual acid, unsatisfactory, and excessive sodium content of nickel sulfate salt, so as to reduce the acidity of the solution, ensure the purity, improve the The effect of nickel content
Active Publication Date: 2022-06-03
JINCHUAN GROUP LIMITED
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Problems solved by technology
However, when the nickel sulfide raw material is treated by the pressure leaching process, because nickel sulfide has a high sulfur content, there is more residual acid in the liquid after pressure leaching, which cannot meet the requirements of the nickel sulfate salt extraction production system for the pH ≥ 4.0 of the pre-extraction liquid.
The existing method to adjust the pH of the pre-extraction solution is to add sodium hydroxide, sodium carbonate or nickel carbonate, etc., which will cause the sodium content of the nickel sulfate salt to exceed the standard
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[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.
[0019] like figure 1 Shown, a kind of preparation method of nickel sulfate solution with high nickel, low acid and low sodium, comprises the following steps:
[0020] S1: Take typical components: nickel sulfide ore containing 47.71% nickel, 0.016% copper, 0.975% cobalt, 5.325% iron, 0.125% sodium, and 34.71% sulfur and sulfuric acid solution with an acidity of 10g / l in a mass ratio of 1:8 Mixing for a period of normal pressure pulping to obtain nickel sulfide pulp with an end point acidity of 12g / l; then the nickel sulfide pulp is sent to the atmospheric pressure reaction tan...
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Abstract
The invention discloses a method for preparing a high-nickel, low-acid, and low-sodium nickel sulfate solution. The first-stage leachate obtained after performing a stage of atmospheric pressure slurrying, atmospheric pressure leaching, and pressure leaching on nickel sulfide ore is used as a second stage of atmospheric pressure slurry The pre-chemical liquid is mixed and slurried with copper-nickel fine-grained alloy, then pre-soaked under normal pressure, and then concentrated and separated by a thickener to obtain a supernatant liquid. After filtering by a filter press, sulfuric acid with high nickel, low acid and low sodium can be obtained Nickel solution, at the same time, because no alkaline solution and other acid radical ions are added in the middle, the purity of the nickel sulfate solution is guaranteed, and the nickel content in the nickel sulfate solution is also increased, and the acidity of the solution is reduced, which can directly meet the needs of the nickel sulfate salt production system. Nickel content ≥ 75g / l, sodium content ≤ 0.01g / l, end point pH ≥ 4.0 technical indicators.
Description
technical field [0001] The invention relates to the technical field of preparation of nickel sulfate, in particular to a method for preparing a nickel sulfate solution with high nickel, low acid and low sodium. Background technique [0002] Nickel sulfate is mainly used in the surface treatment industry and power battery industry. It is the main nickel salt for electroplating nickel and electroless nickel plating, and is the main raw material for manufacturing power batteries. In the prior art, the following two methods are used to prepare nickel sulfate: high-grade nickel matte produced from nickel sulfide ore, or nickel-cobalt mixed sulfide produced from laterite nickel ore, and then purified by acid leaching to produce a qualified nickel sulfate solution; or The nickel-containing solution produced in the copper and cobalt production process is purified to produce a qualified nickel sulfate solution. However, when the nickel sulfide raw material is treated by the pressure...
Claims
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IPC IPC(8): C01G53/10C22B3/08C22C19/03C22B23/00
CPCC01G53/10C22B3/08C22B23/043C22C19/03C01P2006/80Y02P10/20
Inventor 王瑞林赵军天董玉坤闫刚刚冯建华史金鹏李改变赵重赵雷李金良
Owner JINCHUAN GROUP LIMITED