Lead metallurgy process - pyrometallurgical lead smelting (three-stage furnace lead smelting method)

Yuguang three-stage furnace lead smelting method

The main process of Yuguang three-stage furnace lead smelting is bottom blowing furnace oxidation desulfurization, bottom blowing furnace reduction, and fuming furnace recovery of zinc. It was industrialized and applied in 2010. Cancel the blast furnace, eliminate metallurgical coke, and achieve direct reduction of liquid slag. Together with the original oxygen enriched bottom blowing furnace oxidation section, form a complete industrial production system for direct reduction of liquid slag. The specific technical solution is to mix lead concentrate, limestone, quartz sand, etc. and send them to an oxygen bottom blowing furnace for smelting, producing crude lead, liquid slag, and dusty flue gas. Liquid high lead slag is directly fed into the horizontal reduction furnace, with natural gas and oxygen supplied by the bottom spray gun, and a feeding port provided at the top for adding coal particles and stones. The slag is discharged intermittently. The partial oxidation combustion of natural gas and coal particles releases heat, maintaining the temperature required for the reduction reaction. Under gas stirring and mass transfer, the reduction of high lead slag is achieved.