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张家口金矿的矿石,具有金品位低,氧化程度深,含泥量大,金的嵌布粒度细等特点,属于难选矿石。多年来的试验研究和生产实践表明.用混汞-浮选流程选别,金回收率仅在75%左右。为了大幅度提高金回收率和企业经济效益,根据国外黄金生产的新发展.1984年黄金局决定引进国外先进炭浆法提金工艺和关键性设备,对原有选厂进行技术改造。炭浆厂于1985年底基本建成,经生产调试,工艺流程畅通,设备运转正常,1986年6月28日生产出第一批合质金,1987年5月10日经国家正式验收投产。本文拟对技术引进的依据,工艺、设备的消化吸收,改造前后的生产指标对比和经济分析,以及我们工作中主要几点体会,初步加以总结和探讨。
The ore of Zhangjiakou Gold Mine has the characteristics of low gold grade, deep oxidation, large amount of mud and fine grain size of gold, which belongs to the refractory ore. Years of experimental research and production practices show that with amalgamation - flotation process, the gold recovery is only about 75%. In order to greatly improve the gold recovery rate and economic efficiency of enterprises, according to the new development of foreign gold production, 1984 Gold Council decided to introduce advanced foreign technology and gold extraction process of key equipment, the original selection plant for technological transformation. Coking plant was basically completed by the end of 1985, after production and debugging, process flow, the equipment is operating normally, June 28, 1986 to produce the first batch of quality gold, May 10, 1987 by the state formal acceptance of production. This article intends to introduce the basis of technology, technology, equipment, digestion and absorption, before and after the transformation of production indicators comparison and economic analysis, as well as our main experience in the work, initially summed up and discussed.