Process for comprehensive recovery of indium, cadmium, thallium and zinc from lead system smoke
A soot and new process technology, applied in the field of non-ferrous metal smelting, can solve the problems of using more equipment, wasting resources, and not considering recycling, and achieve the effect of reducing equipment investment and increasing efficiency
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[0036]Example: 1 ton of reverberatory furnace (containing 1.4 kg of indium) soot was leached with water and sulfuric acid, the liquid-solid ratio was 2:1, the temperature was about 90 ° C, the time was 4 hours, the initial acidity was 300-350 g / l, and the reaction was completed and diluted with water When the final acid is 70-80g / l, add zinc oxide in the neutralization tank to adjust the acid content of the final acid to 10-20g / l, and then filter by pressure. The output of leaching slag is about 0.8 tons, and the leaching solution is 4m 3 about. The leachate enters the precipitation tank and then enters the extraction process through the high-level tank. The organic phase used for extraction is P 204 Add sulfonated kerosene, P in the organic phase 204 20-35%, sulfonated kerosene 65-80%, the volume ratio of organic phase to inorganic phase in the extraction process is 3:7, the extraction temperature is normal temperature, the number of stages is 5, and the mixing time is 12 ...
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