China Nonferrous Metallurgy

Hydro-zinc smelting residue generally contains valuable metals such as zinc and silver, as well as heavy metals such as lead, cadmium, and arsenic. It is a hazardous waste and requires harmless disposal and recovery of metals such as zinc, lead, and silver. At present, the main domestic zinc slag treatment technologies include rotary kilns, fuming furnaces, and top-blowing furnaces. Although the technology is mature, there is still room for improvement in energy conservation and environmental protection. In response to this problem, ENFI has developed a side-submerged combustion furnace (SSC)+fuming furnace (FF) process for treating zinc leaching residue. This process has the advantages of simple operation, low energy consumption, high recovery rate of valuable metals, and good environmental protection. By comparing with existing technologies, it achieves the best in terms of process operation, metal recovery rate, fuel consumption, heat energy utilization, exhaust gas treatment and environmental protection. This technology integrates hazardous waste disposal and resource utilization, and will have a significant impact on the field of hazardous waste disposal.