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Method for producing nickel sulfate solution by taking nickel oxide as raw material,

A technology of nickel oxide and nickel sulfate, applied in the direction of nickel sulfate, etc., which can solve the problems of difficult nickel oxide treatment, high acidity, and difficulty in reducing pH

Inactive Publication Date: 2019-01-29
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because there is a dense oxide film on the surface, it is difficult to treat nickel oxide, which hinders the industrial application of nickel oxide; the acidity of the nickel oxide treatment solution is high, and the pH is difficult to lower. If alkaline substances are added for neutralization, new impurities will be introduced, and directly Evaporation crystallization seriously corrodes the stainless steel equipment on site

Method used

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  • Method for producing nickel sulfate solution by taking nickel oxide as raw material,
  • Method for producing nickel sulfate solution by taking nickel oxide as raw material,
  • Method for producing nickel sulfate solution by taking nickel oxide as raw material,

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] a. Hydrochloric acid pretreatment of nickel oxide

[0029] Hydrochloric acid with a hydrogen ion concentration of 10mol / L is used to pretreat nickel oxide. The pretreatment temperature is 95°C, the liquid-solid ratio of hydrochloric acid to nickel oxide is 4:1 (the volume of hydrochloric acid is 2.4L, and the weight of nickel oxide is 0.6kg), and the treatment time is 10 minutes. Solid separation, the obtained solid was washed with pure water at room temperature, the liquid-solid ratio of pure water to the obtained solid was 4:1 (the volume of pure water was 2L, and the weight of nickel oxide was 0.5kg), and the washing times were 3 times.

[0030] b. Sulfuric acid dissolves nickel oxide

[0031] Dissolve the nickel oxide obtained in step a with a hydrogen ion concentration of 5.5 mol / L sulfuric acid, the reaction temperature is 90 °C, the liquid-solid ratio is 5:1 (the volume of sulfuric acid is 2.5 L, the weight of nickel oxide is 0.5 kg), and the solid-liquid separat...

Embodiment 2

[0038] a. Hydrochloric acid pretreatment of nickel oxide

[0039] Hydrochloric acid with a hydrogen ion concentration of 7mol / L is used to pretreat nickel oxide. The pretreatment temperature is 85°C, the liquid-solid ratio of hydrochloric acid to nickel oxide is 3:1 (the volume of hydrochloric acid is 1.8L, and the weight of nickel oxide is 0.6kg), and the treatment time is 5 minutes. Solid separation, the obtained solid was washed with pure water at room temperature, the liquid-solid ratio of washing water to nickel oxide was 3:1 (the volume of pure water was 1.71L, and the weight of nickel oxide was 0.57kg), and the number of washings was 4 times.

[0040] b. Sulfuric acid dissolves nickel oxide

[0041] Dissolve nickel oxide with sulfuric acid, the hydrogen ion concentration is 4.5mol / L, the reaction temperature is 85°C, the sulfuric acid volume is 2.3L, the nickel oxide weight is 0.57kg, the hydrogen ion concentration is 0.88mol / L, and the nickel ion is 106.23g / L by solid-...

Embodiment 3

[0048] a. Nitric acid pretreatment of nickel oxide

[0049] Nitric acid with an initial hydrogen ion concentration of 8mol / L, the pretreatment temperature is 75°C, the liquid-solid ratio of nitric acid to nickel oxide is 1:1 (acid volume 1L, nickel oxide weight 1kg), pretreatment time 8min, liquid-solid separation, and solid Wash with pure water at room temperature, the liquid-solid ratio of washing water to nickel oxide is 1:1 (the volume of pure water is 1L, the weight of nickel oxide is 1kg), and the number of washings is 6 times.

[0050] b. Sulfuric acid dissolves nickel oxide

[0051] Dissolve nickel oxide in sulfuric acid with a hydrogen ion concentration of 3mol / L, the reaction temperature is 75°C, the volume of sulfuric acid is 1.9L, the weight of nickel oxide is 0.95kg, and the solid-liquid separation obtains nickel sulfate with a hydrogen ion concentration of 0.58mol / L and a nickel ion of 71g / L solution.

[0052] c. Secondary dissolution of nickel oxide powder

...

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Abstract

The invention discloses a method for producing a nickel sulfate solution by taking nickel oxide as a raw material. The method comprises the following steps: (1) pretreating nickel oxide by adopting hydrochloric acid or nitric acid; (2) dissolving the nickel oxide obtained in the step (1) with sulfuric acid, and then carrying out solid-liquid separation to obtain a filtrate; and (3) adding nickel oxide powder into the filtrate obtained in the step (2) to obtain a nickel sulfate solution. According to the method disclosed by the invention, a surface dense oxidation film of the nickel oxide is pretreated by adopting hydrochloric acid or nitric acid, so that the time consumed by dissolving the nickel oxide by using sulfuric acid is shortened. The nickel oxide powder is adopted to neutralize excess acid, so that impurities are not introduced, meanwhile impurity components in the produced nickel sulfate solution are qualified, and the produced nickel sulfate solution can be used as an evaporation mother liquid needed by evaporation crystallization of nickel sulfate without the need of purification and impurity removal.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for producing nickel sulfate solution by using nickel oxide as a raw material. Background technique [0002] The raw materials for industrial production of nickel sulfate are mainly metallic nickel, nickel carbonyl, nickel sulfide ore, laterite nickel ore, crude nickel sulfate, electroplating sludge and crude nickel hydroxide, etc., but with the rapid development of ternary precursors in the battery industry, Nickel-containing raw materials are in short supply. [0003] With laterite ore as raw material, the nickel oxide produced by spray pyrolysis is spherical particles with a diameter of about 1-3mm. Nickel oxide is mainly used as an adhesive and colorant for enamel, a pigment for ceramics and glass, and in the production of magnetic materials. Used in the production of nickel-zinc ferrite, etc., as well as in the manufacture of nickel catalysts an...

Claims

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Application Information

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IPC IPC(8): C01G53/10
Inventor 赵德周佑明麻在生董存武明键伟沈艳玲徐文兵魏焘
Owner JINCHUAN GROUP LIMITED
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