Method for recycling selenium from electrolytic manganese anolyte
A technology of anolyte and electrolytic manganese, applied in the direction of electrolysis process, electrolysis components, improvement of process efficiency, etc., can solve the problems of difficulty in using recycled selenium, unsuitable for selenium recycling, etc., achieve good economic and environmental benefits, and reduce consumption , the effect of simple operation
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Embodiment 1
[0021] The electrolytic manganese anolyte (the composition is shown in Table 1) was filtered to separate the suspended matter, the filtrate and the manganese powder were uniformly mixed in the reactor at a liquid-solid ratio of 5L / g, and the reaction was carried out at 25°C for 120min, and the selenium in the anolyte was removed. The rate was 97.4%. After filtering, the filtrate is sent to a compound tank for leaching of manganese ore. The filter residue was heated and pretreated at 90°C for 30min, mixed with hydrogen peroxide at a liquid-solid ratio of 0.2L / Kg, and reacted at 45°C for 60min. The dissolution rate of selenium in the residue was 98%. After filtration, the filtrate is returned to the electrolytic manganese production as a selenium additive; the filter residue after separation of selenium is sent to the manganese ore leaching process for use.
[0022] Table 1 Analysis of main components of electrolytic manganese anolyte
[0023] Composition (g / L)
Embodiment 2
[0025] The electrolytic manganese anolyte (the composition is shown in Table 1) was filtered to separate the suspended matter, the filtrate and manganese powder were uniformly mixed in the reactor according to the liquid-solid ratio of 15L / g, and the reaction was carried out at 45°C for 90min, and the selenium in the anolyte was removed. The rate is 98.5%. After filtering, the filtrate is sent to a compound tank for leaching of manganese ore. The filter residue was heated and pretreated at 80°C for 60min, mixed with hydrogen peroxide at a liquid-solid ratio of 1.0L / Kg, and reacted at 35°C for 20min. The selenium dissolution rate in the residue was 99.6%. After filtration, the filtrate is returned to the electrolytic manganese production as a selenium additive; the filter residue after separation of selenium is sent to the manganese ore leaching process for use.
Embodiment 3
[0027] The electrolytic manganese anolyte (the composition is shown in Table 1) was filtered to separate the suspended matter, the filtrate and manganese powder were uniformly mixed in the reactor according to the liquid-solid ratio of 25L / g, and the reaction was carried out at 65°C for 60min, and the selenium in the anolyte was removed. The rate is 95.5%. After filtering, the filtrate is sent to a compound tank for leaching of manganese ore. The filter residue was heated and pretreated at 60°C for 90min, mixed with hydrogen peroxide at a liquid-solid ratio of 1.8L / Kg, and reacted at 50°C for 50min. The selenium dissolution rate in the residue was 97.4%. After filtration, the filtrate is returned to the electrolytic manganese production as a selenium additive; the filter residue after separation of selenium is sent to the manganese ore leaching process for use.
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