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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: 2017-05-17
GUANGDONG JIANA ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Production method of cobalt sulfate monohydrate

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Effect test

Embodiment 1

[0019] After sulfuric acid leaching, extracting copper, precipitation and iron removal, P204 extraction and removal of impurities, and P507 extraction and back extraction, pure Co is obtained. 2+ 120g / L cobalt sulfate solution. Add Na to pure cobalt sulfate solution 2 CO 3 Carry out precipitation, the precipitated slurry is separated and washed by the filter press for solid-liquid separation, and the mother liquor and washing water are returned to the alum precipitation process of cobalt wet smelting. CoCO 3 The precipitate is transferred to the dissolving tank, and the pure water and mother liquor are stirred and slurryed uniformly, and then 98% concentrated sulfuric acid is quickly added for acid dissolution. The heat of reaction and dilution heats the acid solution slurry to 106 ºC, and the pH value of the solution reaches 4.5. Stop adding concentrated sulfuric acid. Transfer the acid solution into the autoclave and heat it to a temperature of 200 ºC, keep the slurry tempera...

Embodiment 2

[0021] After sulfuric acid leaching of laterite nickel ore, iron removal by precipitation, P204 extraction and removal of impurities, and P507 extraction and back extraction, pure Co is obtained 2+ 120g / L cobalt sulfate solution. NaOH is added to the pure cobalt sulfate solution for precipitation, the precipitated slurry is separated and washed by the filter press for solid-liquid separation and washing, the precipitation mother liquor and washing water are returned to the alum precipitation process of cobalt wet smelting, Co(OH) 2 The precipitate is transferred to the dissolving tank, and the pure water and mother liquor are stirred and slurryed evenly, and then 98% concentrated sulfuric acid is quickly added for acid dissolution. The heat of reaction and dilution heats the acid solution slurry to 70 ºC, and the pH value of the acid solution reaches 1.5. Stop adding concentrated sulfuric acid. The acid solution is transferred to an autoclave and heated to a temperature of 120 º...

Embodiment 3

[0023] After the cobalt-containing sulfide ore is leached by oxygen pressure, alumite is removed for iron removal, P204 is extracted for impurity removal, and P507 is extracted for back extraction, pure Co is obtained. 2+ 120g / L cobalt sulfate solution. Add NH to pure cobalt sulfate solution 4 HCO 3 Carry out precipitation, the precipitated slurry is separated and washed by the filter press for solid-liquid separation, and the mother liquor and washing water are returned to the alum precipitation process of cobalt wet smelting. CoCO 3 The precipitate is transferred to the dissolving tank, and the pure water and mother liquor are stirred and slurryed uniformly, and then 98% concentrated sulfuric acid is quickly added for acid dissolution. The heat of reaction and dilution heats the acid solution slurry to 88 ºC, and the pH value of the acid solution reaches 3.0. Stop adding concentrated sulfuric acid. Transfer the acid solution into the autoclave and heat it to a temperature of ...

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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 present invention relates to a production technology of cobalt sulfate monohydrate, in particular to a technology for producing cobalt sulfate monohydrate through steps of precipitation, acid dissolution, high-temperature crystallization and the like from a cobalt sulfate solution. Background technique [0002] The current cobalt sulfate monohydrate usually uses a two-step process. A two-step method, namely, firstly prepare cobalt sulfate heptahydrate by evaporative concentration-cooling and crystallization, and then perform high temperature treatment on the cobalt sulfate heptahydrate to remove the crystal water to obtain the cobalt sulfate monohydrate product. This method has the following shortcomings: (1) The combination of evaporation-cooling crystallization process and high-temperature dehydration process, complicated process, long production cycle and low production efficiency; (2) High energy consumption and high cost in the evaporation process...

Claims

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Application Information

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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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