| abstract |
The invention discloses a method for efficiently enriching valued metals from complicated sulfur- and lead-containing waste residue. The method comprises the following steps of: drying and grinding the sulfur- and lead-containing waste residue; adding coke powder and NaOH, smelting at the temperature of between 300 and 500DEG C for 30 to 60 minutes; and heating to the temperature of between 600 and 800DEG C, smelting for 60 to 180DEG C, and removing an upper dross layer to obtain a lower melt in which noble metals are enriched, wherein the recovery rate of lead in the melt is over 94 percent, the recovery rate of bismuth is over 96 percent, the recovery rate of gold is over 84 percent and the recovery rate of silver is over 95 percent. The method has the advantages of high recovery rates of metals, no environmental pollution, short flow and simple operation. |