Method for extracting cobalt-manganese metal compound from active sludge
A technology of activated sludge and compounds, which is applied in the field of manganese metal compounds and cobalt extraction, to achieve the effects of high recovery rate of cobalt and manganese, high product purity and low production cost
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[0006] The present invention is further described in conjunction with the examples. The present invention uses advanced rotary kiln drying technology to dry and dehydrate the sludge at 300°C to remove 80% of the water in the sludge, so that the sludge is dried from the original colloidal state into particles with a water content of about 10%. . Sludge contains a large amount of organic matter. When the temperature reaches 500°C, the organic matter will spontaneously ignite, and the heat released by the spontaneous combustion can ignite the material. Basically, no coal is needed, which can save a lot of energy and reduce the treatment cost. Taking advantage of this feature, we have designed and built a suitable incinerator, which can dry and incinerate about 100 tons of sludge every day. In the ash after incineration, the content of cobalt and manganese is enriched from about 0.2% to about 10%, and then dissolved with acid, combined with the beating wastewater from which benzoi...
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