A method for preparing cobalt oxide from zinc smelting cobalt slag
A zinc smelting and cobalt oxide technology is applied in the field of zinc smelting cobalt slag to prepare cobalt oxide, which can solve the problems of large investment in extraction equipment, affecting the stability of the main system, and occupying a lot of organic matter, avoiding unstable factors, reducing processing costs and equipment. The effect of short investment and process flow
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Embodiment 1
[0038] The method for preparing cobalt oxide from zinc smelting cobalt slag of the present invention, the detailed steps of this preparation method are as follows:
[0039] a. First, add zinc smelting cobalt slag and demineralized water according to the liquid-solid ratio of 3:1 for slurrying, then add concentrated sulfuric acid according to the initial acidity of 70g / L, raise the temperature and maintain the temperature at 85°C for 4 hours, then acid wash Press filtration after washing; the press filter residue is slurried by adding desalted water according to the liquid-solid ratio of 3:1, and then washed with water at room temperature for 1 hour to perform press filtration to obtain the pretreated cobalt residue;
[0040] b. Add desalted water to the cobalt slag pretreated in step a according to the liquid-solid ratio of 3:1 for slurrying, then add concentrated sulfuric acid twice the theoretical amount, maintain the reaction temperature at 80°C, and slowly add hydrogen pero...
Embodiment 2
[0047] The method for preparing cobalt oxide from zinc smelting cobalt slag of the present invention, the detailed steps of this preparation method are as follows:
[0048] a. First add zinc smelting cobalt slag and demineralized water according to the liquid-solid ratio of 4:1 for slurrying, then add concentrated sulfuric acid according to the initial acidity of 60g / L, heat up and maintain the temperature at 90°C for 3 hours, pickle Finally, press filtration; the press filter residue is slurried by adding desalted water according to the liquid-solid ratio of 4:1, and then washed with water at room temperature for 1 hour to perform press filtration, and the pretreated cobalt residue is obtained;
[0049]b. Add desalted water to the cobalt slag pretreated in step a according to the liquid-solid ratio of 4:1 for slurrying, then add concentrated sulfuric acid with a theoretical dosage of 1.8 times, maintain the reaction temperature at 75°C, and slowly add hydrogen peroxide with a ...
Embodiment 3
[0056] The method for preparing cobalt oxide from zinc smelting cobalt slag of the present invention, the detailed steps of this preparation method are as follows:
[0057] a. First, add zinc smelting cobalt slag and demineralized water according to the liquid-solid ratio of 5:1 for slurrying, then add concentrated sulfuric acid according to the initial acidity of 50g / L, heat up and maintain the temperature at 90°C for 2 hours, pickle Finally, press filtration; the press filter residue is slurried by adding desalted water according to the liquid-solid ratio of 5:1, and then washed with water at room temperature for 1 hour to perform press filtration to obtain pretreated cobalt residue;
[0058] b. Add desalted water to the cobalt slag pretreated in step a according to the liquid-solid ratio of 5:1 for slurrying, then add concentrated sulfuric acid 1.5 times the theoretical amount, maintain the reaction temperature at 70°C, and slowly add hydrogen peroxide 6 times the theoretica...
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