铅富氧闪速熔炼的整体运行效果及评价

Production Status and Evaluation of Lead Oxygen-Enriched Flash Smelting Process

2011年5月10日,年产10万t粗铅的铅富氧闪速熔炼工程正式投料生产。在入炉料含铅25%～30%的情况下,取得了一次铅还原率大于85%、铅总回收率98.5%、金银回收率大于99.5%、铜回收率大于85%、锌回收率大于90%、脱硫率大于98%的指标;取消烟化炉,真正实现了铅、锌的一次回收;包括还原贫化电炉挥发锌的能耗在内,吨粗铅综合能耗约为213kgce;弃渣含铅、锌小于2%(最低小于1%)、平均含银小于6g/t、含金小于0.1g/t、含铜小于0.1%;产出的氧化锌灰不含氟、氯,可以不经多膛炉脱氟氯而直接送锌冶炼厂回收锌。工业生产中取得的多项技术经济指标表明,铅富氧闪速熔炼新技术已经达到世界领先水平。

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 is more than 85%,the metal recovery rates of Pb,Au Ag,Cu and Zn are 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%）,Ag6 g/t,Au0.1 g/t,and Cu0.1% 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 leadership of world level.