Cobalt removing agent and application thereof
A cobalt removal agent and reaction technology, applied in the field of secondary resource recovery, can solve the problems of decomposition, large dosage, and low overall efficiency, and achieve the effect of high selectivity, strong selectivity, and suitable for large-scale industrialization
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[0038] Example 1
[0039] Mix 2mol / L sulfuric acid and zinc smelting slag with a liquid-to-solid ratio of 5:1, heat and stir for 2h, and filter to obtain the leachate. Use the neutralization hydrolysis method and the zinc powder replacement method to remove iron and cadmium ions respectively, and filter to obtain the cobalt removal preliquid . The concentration of zinc in the solution before cobalt removal is 110g / L, the concentration of cobalt is 650mg / L, the concentration of manganese is 2.4g / L, and the pH is adjusted to 4.5. Add 6g thiram and 0.5g sodium nitrite to 1L solution. The reaction was carried out at a stirring rate of revolutions per minute for 2 hours and filtered. The cobalt concentration in the filtrate was 1.3 mg / L, the manganese concentration was basically unchanged, the cobalt recovery rate was 99.8%, and the precipitated residue was dried after pickling, and the cobalt taste was 13.8%. The cobalt precipitate was oxidized and roasted at 600°C for 1 hour, and t...
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[0040] Example 2
[0041] Mix 2mol / L sulfuric acid and zinc smelting slag with a liquid-to-solid ratio of 5:1, heat and stir for 2h, and filter to obtain the leachate. Use the neutralization hydrolysis method and the zinc powder replacement method to remove iron and cadmium ions respectively, and filter to obtain the cobalt removal preliquid . The concentration of zinc in the solution before cobalt removal is 115g / L, the concentration of cobalt is 550mg / L, the concentration of manganese is 2.8g / L, and the pH is adjusted to 5. Add 5g thiram and 0.4g sodium nitrite to 1L solution at 90℃ The reaction was carried out at a stirring rate of 500 revolutions / minute for 2 hours and filtered. The cobalt concentration in the filtrate was 1.5 mg / L, the manganese concentration was basically unchanged, the cobalt recovery rate was 99.7%, and the precipitated residue was dried after pickling, and the cobalt taste was 13.5%. The cobalt precipitate was oxidized and roasted at 600°C for 1 hour, a...
Example Embodiment
[0042] Example 3
[0043] Mix 2mol / L sulfuric acid and zinc smelting slag with a liquid-to-solid ratio of 5:1, heat and stir for 2h, and filter to obtain the leachate. Use the neutralization hydrolysis method and the zinc powder replacement method to remove iron and cadmium ions respectively, and filter to obtain the cobalt removal preliquid . The concentration of zinc in the solution before cobalt removal is 108g / L, the concentration of cobalt is 600mg / L, the concentration of manganese is 2.3g / L, and the pH is adjusted to 5. Add 6g thiram and 0.4g sodium nitrite to 1L solution at 90℃ The reaction was carried out at a stirring rate of 500 revolutions / minute for 1.5 hours and filtered. The cobalt concentration in the filtrate was 1 mg / L, the concentration of manganese was basically unchanged, the recovery rate of cobalt was 99.8%, and the precipitated residue was dried after pickling, and the cobalt taste was 13.7%. The cobalt precipitate was oxidized and roasted at 800°C for 1 h...
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