The Recovery of Pb and Zn in Antimony Smelting Slag

摘要

This paper studies the recovery of metals Pb, Zn, and Sb in antimony smelting slag by fuming furnace. The study focuses on volatile mechanism of Pb, Zn, and Sb, metal distribution, metal recovery, and fuel consumption in the process of slag fuming. It is concluded in this report that the Pb, Zn, and Sb from reduction reaction in the molten bath during the process of fuming will be oxidized in the offgas zone and collected by dust collection. When the antimony smelting slag contains Pb ～ 1.2%, Zn ～6.9%, and Sb ～ 1.4%, the metal recovery of Pb, Zn, and Sb after fuming and volatile process will be 95%, 88%, and 60%, respectively. Meanwhile, the coal consumption is ～0.3 t per ton antimony smelting slag, when the pulverized coal with 59.92% fixed carbon is utilized as reductant and fuel.