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A production method and technology for nickel salts, which are applied in nickel sulfate, nickel compound preparation, liquid solution solvent extraction, etc., can solve problems such as rising salinity of external water bodies, and achieve the effects of automatic operation, high purity, and reduced production costs.
Active Publication Date: 2020-06-12
李成文 +1
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The discharge liquid is often directly discharged into the external water body, which leads to an increas...
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Embodiment 1
[0077] The crude nickel hydroxide (MHP) produced from laterite nickel ore was used to produce battery-grade nickel sulfate. The main components (mass fraction) of the samples are shown in Table 1.
[0078] The composition of table 1 embodiment 1 crude nickel hydroxide
[0080] Put the above sample into the reaction kettle, control the solid-liquid ratio of 1:7, stir, add 98% concentrated sulfuric acid, pass in steam, keep the reaction temperature at 65°C, add hydrogen peroxide, react for 4 hours, and the final acid is controlled at pH 2.5 . The leaching liquid was separated from solid and liquid by a plate and frame filter press to obtain a nickel sulfate leaching liquid, the main components of which are shown in Table 2.
[0081] The main component of table 2 embodiment 1 nickel sulfate leaching solution
[0082] el...
Embodiment 2
[0095] The crude nickel carbonate produced from electroplating sludge was used to produce battery-grade nickel sulfate. The main components of the samples are shown in Table 6.
[0096] The composition of table 6 embodiment 2 nickel carbonate
[0097] element Ni co mn Fe Cu Zn Ca Mg content% 45.1 0.02 0.01 0.13 0.01 0.01 0.047 0.28
[0098] Add the above sample into the reaction kettle, control the solid-liquid ratio of 1:7, stir, add 98% concentrated sulfuric acid, feed steam, keep the reaction temperature at 65°C, react for 4 hours, and control the terminal acidity at pH 4.0. The leaching slurry was separated from solid and liquid by a precision filter to obtain a nickel sulfate leaching solution, the main components of which are shown in Table 7.
[0099] The main component of table 7 embodiment 2 nickel sulfate leaching solution
[0100] element Ni co mn Fe Cu Zn Ca Mg Contentg / L 64.8 0.027 0.01...
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Abstract
The invention relates to the field of hydrometallurgy, and discloses a nickel salt production method, which comprises the following steps: preparing leachate from a nickel salt raw material; treatingthe leachate by using a first extraction solution to obtain a first loaded extraction solution and a first raffinate, the concentration of specified impurity metal ions in the first raffinate being lower than the concentration of specified impurity metal ions in the leachate; treating the first raffinate with a second extraction liquid to obtain a second loaded extraction liquid and a second raffinate, both the first extraction liquid and the second extraction liquid being magnesium saponified organic extraction liquid, and the second raffinate being used for preparing magnesium sulfate; washing the second loaded extracting solution with a detergent to obtain a first purified extracting solution; carrying out elution treatment on the first purified extracting solution by using an eluent toobtain a second purified extracting solution; and reversely extracting the second purified extracting solution by using an acid solution to obtain a purified nickel salt solution. The nickel salt prepared by the method is high in purity, low in production cost, small in discharge amount of discharge liquid generated in the production process, low in salinity and environment-friendly.
Description
technical field [0001] The invention relates to the field of hydrometallurgy, in particular to a nickel salt production method. Background technique [0002] Battery-grade nickel salt is the main raw material for the preparation of nickel-containing cathode materials. Due to cost considerations, the existing battery-grade nickel salts are usually prepared from nickel salt raw materials with lower cost and more impurities. Low-cost nickel salt raw materials include but are not limited to nickel sulfide ore, laterite nickel ore, crude nickel sulfate, crude nickel carbonate and crude nickel hydroxide. [0003] The existing production of battery grade nickel salt mostly adopts chemical method and extraction method. Chemical methods are more expensive to produce, while extraction methods produce effluents with higher salinity. The salt contained in the effluent has a low recovery value and is not currently a restricted substance (such as sodium sulfate). The discharge liquid ...
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