Abstract:The first lead oxygen-enriched flash smelting plant in China, with an annual capacity of 100 kt of lead bullion, was successfully put into production on May 10, 2011. With the use of charging materials with 25%~30% lead content, it performed satisfactory technical and economical indexes, that is, the primary reduction rate of lead was more than 85%, the metal recovery rates of Pb, Au & Ag, Cu and Zn were >98.5%, >99.5%, >85% and >90%, respectively, with the desulfurization rate over 98%. One-step recovering Pb & Zn technique was realized due to cancel fuming furnace. The comprehensive energy consumption of crude lead, including the energy consumption of zinc volatilization in the reduction furnace, was about 213 kgce/t. Waste slag with Pb & Zn <2% (average <1%), Ag<6 g/t, Au<0.1 g/t, and Cu<0.1% was produced. With no fluorine and chlorine, zinc oxide ash can be sent to zinc smelting plant directly to recover zinc without defluorination and dechlorination in multi-hearth furnace. Several technical and economic indexes obtained from the industry production show that lead oxygen-enriched flash smelting process has reached the world advanced level.