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A kind of production method of cobalt sulfate monohydrate

A production method and technology of cobalt sulfate, applied in directions such as cobalt sulfate, can solve problems such as high cost and complicated process flow, and achieve the effects of reducing content, avoiding accumulation, and avoiding high-temperature removal of crystal water.

Active Publication Date: 2021-02-09
GUANGDONG JIANA ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The problem solved by the present invention is to provide a new method for the production of cobalt sulfate monohydrate, to solve the shortcomings of complicated technological process and high cost in the above background

Method used

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  • A kind of production method of cobalt sulfate monohydrate

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Effect test

Embodiment 1

[0019] After hydrocobalt ore is leached with sulfuric acid, extracted to collect copper, precipitated alum to remove iron, P204 to remove impurities, and P507 to extract and back-extract, pure Co 2+ 120g / L cobalt sulfate solution. Add Na to pure cobalt sulfate solution 2 CO 3 For precipitation, the precipitated slurry is separated and washed by a filter press, and the precipitated mother liquor and washing water are returned to the alum sinking process of cobalt hydrometallurgy. CoCO 3 Transfer the precipitate to the dissolution tank, stir and slurry with pure water and mother liquor, and then quickly add 98% concentrated sulfuric acid for acid dissolution. The heat of reaction and dilution heat up the temperature of the acid-dissolved slurry to 106 ºC, and the pH value of the solution reaches 4.5 Stop adding concentrated sulfuric acid. Transfer the acid solution into an autoclave and heat it to a temperature of 200 ºC. After 2 hours of constant temperature, keep the slurr...

Embodiment 2

[0021] After the laterite nickel ore is leached with sulfuric acid, iron is removed by sinking alum, impurity is removed by P204 extraction, and pure Co is obtained by P507 extraction. 2+ 120g / L cobalt sulfate solution. NaOH is added to the pure cobalt sulfate liquid for precipitation, the precipitated slurry is separated and washed by a filter press, and the precipitated mother liquor and washing water are returned to the alum sinking process of cobalt hydrometallurgy. Co(OH) 2 Transfer the precipitate to the dissolution tank, stir and slurry with pure water and mother liquor, then quickly add 98% concentrated sulfuric acid for acid dissolution, the heat of reaction and dilution heat up the temperature of the acid-soluble slurry to 70 ºC, and the pH value of the acid solution reaches 1.5 Stop adding concentrated sulfuric acid. Transfer the acid solution into an autoclave and heat it to a temperature of 120 ºC. After maintaining the temperature for 2 hours, keep the temperatu...

Embodiment 3

[0023] Cobalt-containing sulfide ores are subjected to oxygen pressure leaching, alum sinking to remove iron, P204 extraction to remove impurities, and P507 extraction to obtain pure Co 2+ 120g / L cobalt sulfate solution. Add NH to pure cobalt sulfate solution 4 HCO 3 For precipitation, the precipitated slurry is separated and washed by a filter press, and the precipitated mother liquor and washing water are returned to the alum sinking process of cobalt hydrometallurgy. CoCO 3 Transfer the precipitate to the dissolution tank, stir and slurry with pure water and mother liquor, and then quickly add 98% concentrated sulfuric acid for acid dissolution. The heat of reaction and dilution heat up the temperature of the acid-soluble slurry to 88 ºC, and when the pH value of the acid solution reaches 3.0 Stop adding concentrated sulfuric acid. Transfer the acid solution into an autoclave and heat it to a temperature of 160 ºC. After maintaining the temperature for 2 hours, keep the...

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Abstract

The invention provides a production method of cobalt sulfate monohydrate. The production method comprises the following steps: (1) precursor preparation: adding alkaline precipitant in a pure cobalt sulfate solvent, filtering and washing the precipitate to obtain a cobalt carbonate or cobalt hydroxide precursor, and returning a precipitate mother solvent to a vitriol precipitating process for cobalt wet smelting; (2) precursor acid dissolvent: stirring and slurrying the precursor in a dissolving tank by use of pure water or mother solvent, adding concentrated sulfuric acid to perform the acid dissolvent, warming the acid-dissolved slurry through the reaction heat and the diluting heat; (3) acid dissolved solvent high-temperature crystallization: stopping adding concentrated sulfuric acid after completely dissolving, transferring into a pressure reactor to perform the high-temperature crystallization, thermally filtering the crystal slurry after the crystallization to obtain the cobalt sulfate monohydrate product and the crystallization mother solvent, returning the mother solvent to a slurrying process of the precursor. By use of the production method provided by the invention, a process of evaporating the crystallization and a process for drying and removing water of crystallization in the existing two-step method for producing the cobalt sulfate monohydrate are avoided, the steam consumption in the production procedure is lowered, the cost is greatly lowered, and the formation of a water insoluble matter in the evaporation procedure is avoided at the same time.

Description

technical field [0001] The invention relates to the production technology of cobalt sulfate monohydrate, in particular to the technology of producing cobalt sulfate monohydrate through processes such as precipitation-acid dissolution-high temperature crystallization and the like. Background technique [0002] The current cobalt sulfate monohydrate usually uses a two-step process. Two-step method, that is, first prepare cobalt sulfate heptahydrate through evaporation concentration-cooling crystallization, and then perform high-temperature treatment on cobalt sulfate heptahydrate to remove crystal water, and then obtain cobalt sulfate monohydrate product. This method has the following disadvantages: (1) Combination of evaporation-cooling crystallization process and high-temperature dehydration process, complex process, long production cycle, and low production efficiency; (2) High energy consumption and high cost in the evaporation process and high-temperature dehydration proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/10
CPCC01G51/10
Inventor 付海阔冯焕村吴理觉黄亚祥陈耀
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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