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Composite additive for purifying and removing cobalt in zinc hydrometallurgy

A compound additive, hydrometallurgical zinc technology, applied in the direction of process efficiency improvement, material recovery, etc., can solve the problems of high temperature requirements, large consumption of zinc powder, and large steam consumption in the purification process, and achieves high replacement and separation speed. The effect of low powder consumption and high purification and impurity removal efficiency

Active Publication Date: 2013-06-05
YUNNAN CHIHONG RESOURCE COMPREHENSIVE UTILIZATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although arsenic salt is used as the purification additive, although the purification ability is strong and the consumption of zinc powder is low, the process is prone to produce highly toxic substances As H 3 , there is a greater safety hazard; compared with the former, antimony salt is used as the purification additive, the additive consumption is low, and no highly toxic substances are produced, but there is a large consumption of zinc powder, high temperature requirements for the purification process, large steam consumption, and the presence of cobalt greater dispersion of

Method used

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  • Composite additive for purifying and removing cobalt in zinc hydrometallurgy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In percent by weight, the Sb content is 57.20%, the As content is 3.68%, the Pb content is 5.17%, and the balance is other impurities that do not affect cobalt removal, wherein 80.38% of Sb is Sb 2 o 3 The form exists, 95.24% of As is SbAsO 4 After grinding, 98.5% of the material particle size of the mixture can pass through a 0.074mm sieve to obtain the final composite additive.

[0018] Prepare 2000mL of pre-purification solution with a cobalt content of 40mg / L, and conduct a purification and cobalt removal test at a temperature of 80-85°C and a rotation speed of 75r / min. When the temperature reaches 80°C, add copper sulfate in an amount of 70mg / L Solution, after 5 minutes, zinc powder is added at 2.7g / L, and composite additives are added according to 80% cobalt content, and after purification for 60 minutes, liquid-solid separation is carried out quickly. The cobalt content of the purified liquid was determined to be 0.33 mg / L by a nitroso-red salt colorimetric met...

Embodiment 2

[0020] In terms of weight percentage, the Sb content is 30%, the As content is 1%, the Pb content is 3%, and the balance is other impurities that do not affect cobalt removal, of which 75%-85% of Sb is Sb 2 o 3 The form exists, 80%-95% of As is SbAsO 4 form exists. After grinding, 95.0% of the material particle size can pass through a 0.074mm sieve to obtain a composite additive.

[0021] Prepare 2000mL of pre-purification solution with a cobalt content of 50mg / L, and conduct a purification and cobalt removal test at a temperature of 80-85°C and a speed of 75r / min. When the temperature reaches 80°C, add copper sulfate in an amount of 80mg / L Solution, after 5 minutes, zinc powder is added at 3.0g / L, and composite additives are added at the rate of 140% cobalt content, and after purification for 75 minutes, liquid-solid separation is carried out quickly. The cobalt content of the purified liquid was determined to be 0.26mg / L by the nitroso-red salt colorimetric method and a 7...

Embodiment 3

[0023] In terms of weight percentage, the Sb content of the composite additive is 60%, the As content is 6%, the Pb content is 15%, and the balance is other impurities that do not affect cobalt removal, wherein 75%-85% of Sb is Sb 2 o 3 The form exists, 80%-95% of As is SbAsO 4 form exists. After grinding, 98.0% of the material particle size can pass through the 0.074mm sieve to obtain the compound additive.

[0024] Prepare 2000mL of pre-purification solution with a cobalt content of 65mg / L, and carry out the purification and cobalt removal test at a temperature of 80-85°C and a rotation speed of 75r / min. When the temperature reaches 80°C, add copper sulfate in an amount of 90mg / L Solution, after 5 minutes, zinc powder is added at 3.3g / L, and composite additives are added according to the cobalt content of 180%. After purification for 90 minutes, liquid-solid separation is carried out quickly. The cobalt content of the purified liquid was determined to be 0.18 mg / L by a ni...

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Abstract

The invention discloses a composite additive for purifying and removing cobalt in zinc hydrometallurgy, which is prepared by mixing, grinding and drying. In the preparation process, the Sb content is controlled to be 0.51 to 60 percent, the As content is controlled to be 0.1 to 6 percent, the Pb content is controlled to be 0.5 to 15 percent, and the balance is impurities, wherein 75 to 85 percentof Sb exists in a form of Sb2O3, and 80 to 90 percent of As exists in a form of SbAsO4. The composite additive can effectively improve the process of purifying zinc and removing the cobalt, improve the purification effect and particularly has remarkable purification effect on zinc sulfate with high cobalt content, which cannot be effectively treated by the conventional additive; meanwhile, the consumption of the additive is reduced, the production cost is saved, and the composite additive does not contain volatile organic solvents, does not influence the environment and is free from secondarypollution and environmentally-friendly.

Description

technical field [0001] The invention relates to a composite additive for cobalt and purification in zinc hydro-smelting, especially for solutions with high cobalt content, which has obvious purification effect. In the process of zinc hydrometallurgy, the technical field of zinc solution purification. Background technique [0002] At present, arsenic or antimony salts are used as additives in the purification process of zinc hydrometallurgy at home and abroad. The principle of cobalt removal is based on the chemical reaction of the more electronegative zinc powder with the more electropositive cobalt ions in the zinc sulfate solution at a certain pH, temperature and stirring intensity, thereby replacing the cobalt ions from the solution. The purpose of adding antimony salt or arsenic salt is to reduce the overvoltage of cobalt ions, thereby improving the thermodynamic conditions of its replacement and realizing the effective removal of cobalt ions. [0003] Although arsenic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/44C22B3/46C22B19/00
CPCY02P10/234Y02P10/20
Inventor 罗永光韩朝云谢庭芳李国江王帆黄云东孙成余蔡挂才晋家强吴仕燕王军会蒋绍康张梅
Owner YUNNAN CHIHONG RESOURCE COMPREHENSIVE UTILIZATION CO LTD
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