A kind of processing method of sodium formazan cobalt slag
A technology of fumei sodium cobalt slag and process method, which is applied in the direction of improving process efficiency and can solve the problems of high equipment investment and production cost
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Embodiment 1
[0026] Example 1: Zinc was eluted with low-acid acid elution for the cobalt slag of forma in the composition table 1, the liquid-solid ratio (mL / g) was 1:1, normal temperature, the leaching time was 0.5 h, the temperature was 40°C, and the acidity of sulfuric acid was 100g / L, the extraction rate of zinc and iron is 97.2%, 92.4%; cobalt and cadmium are hardly dissolved (cobalt, cadmium and precipitant sodium formex are strongly chelated), the pickling slag contains 26.65% cobalt, and the slag rate is 24.7%;
[0027] Roasting of pickling slag: 200g of pickling slag, 10wt% sodium persulfate, 200°C calcination time, 0.5h calcination time; sulfation slag roasting at 300°C calcination temperature, 0.5h calcination time, calcination slag The rate is 30.78%;
[0028] Water leaching includes adding water to the crude cobalt sulfate obtained by roasting at a liquid-solid ratio of 10:1 for stirring and leaching. The reaction temperature is 90°C and the time is 2 hours. The slurry is vac...
Embodiment 2
[0032] Example 2: Carry out low-acid acid elution on the cobalt slag of sodium formazan in the composition table 1, the liquid-solid ratio (mL / g) is 10:1, normal temperature, the leaching time is 2 h, the temperature is 70 ℃, and the acidity of sulfuric acid is 10g / L, the extraction rate of zinc and iron is 97.32% and 91.36%; cobalt and cadmium are almost not dissolved (cobalt, cadmium and precipitant sodium formex are strongly chelated), and the pickling slag contains 26.97% cobalt.
[0033] Oxidative roasting of pickling slag: pickling slag 200g, sodium persulfate added at 30wt%, roasting temperature 300 °C, roasting time 1 h; then heat up for sulfation roasting: roasting temperature 500 °C, roasting time 2 h, roasting The slag rate is 31.5%;
[0034] Water leaching includes adding water to the crude cobalt sulfate obtained by roasting at a liquid-to-solid ratio of 1:1 for stirring and leaching. The reaction temperature is 40°C and the time is 0.5h. The slurry is vacuum fil...
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