铅富氧闪速熔炼新技术

由北京矿冶研究总院提供主体工艺设备与设计、与灵宝市华宝产业有限责任公司合作开发的我国第一座具有完全自主知识产权的10万t/a铅富氧闪速熔炼厂于2011年5月10日在河南省灵宝市正式投料生产。入炉物料含铅约30%,闪速熔炼渣含铅8%～12%。经电炉贫化还原,电炉弃渣含铅小于2%、含锌小于2%、平均含银小于6g/t、含金小于0.1g/t、含铜小于0.1%。粗铅品位大于98%。闪速熔炼烟尘含铅大于65%、含锌小于3%,烟尘率8%～12%且全部闭路返回熔炼。铅回收率大于98%、金银回收率大于99.5%、总硫利用率大于98%。包括还原贫化电炉挥发锌的能耗在内,粗铅综合能耗213kgce/t。

New Technology of Lead Oxygen-Enriched Flash Smelting

The lead oxygen-enriched flash smelting plant with an annual capacity of 100 kt crude lead was put into production on May 10, 2011 in Linbao City, Henan Province, with independent intellectual property rights in China, under the joint efforts of Huabao Industry (Group) Co. Ltd. in Lingbao and Beijing General Research Institute of Mining and Metallurgy, the provider of the main techniques and equipment design in this project. Raw materials containing 30% Pb were put into the furnace and flash smelting slag with 8%~12% Pb was received. After lean reduction in electric furnace, waste slag with < 2% Pb, <2% Zn, <6 g/t Ag & Au and <1% Cu was produced. The grade of the obtained crude lead was more than 98%. The flash smelting dust containing >65% Pb and <3% Zn with a yield rate of 8%~12% was totally returned to the flash smelting process. Metal recovery rates reached >98% Pb, >99.5% Au, >99.5% Ag, respectively. The utilization ratio of total sulfur was over 98%, and the comprehensive energy consumption of the crude lead was 213 kgce/t, including the energy consumption of zinc volatilization in electric furnace.