扩大选矿系统生产能力的改造实践

随着矿房开采的深入，青岛某金矿原矿入选品位有逐年下降的趋势，为应对这一情况，对该矿的选矿系统进行扩建改造，以达到降本增效的目的。通过流程考察与设备更新，遵循“投资少，见效快”的原则，充分利用原有设备的富余能力，仅增加1台小球磨机，以较少的投资实现选矿处理能力大幅度提高。改造后，磨矿处理量由改造前的180 t/d增加到目前的280 t/d，选矿吨矿成本由改造前的34.75元/t下降到32.53元/t，年经济效益约280万元。本次改造是多碎少磨在生产中应用的典型事例，对老选矿车间流程改造具有一定的借鉴意义。

The Practice of Expanding Mineral Processing Capacity

With the deepening of the mining,the gold ore grade has a declining trend in a gold mine of Qingdao,to deal with this situation,proposed to extension and reformed the mine beneficiation system,and achieved the purpose of cost reduction and efficiency increment.Through process inspection and the equipment renewal,following the principle of ＂less investment and quick results＂,taking full advantage of the capacity of existing equipment to get a greatly improvement in the beneficiation processing capacity with less investment of adding only a small mill.After transformation,beneficiation processing capacity is greatly improved,grinding processing handling capacity increases from 180 t/d to 280 t/d,the cost per ton decreases from 34.75 yuan/t to 32.53 yuan/t,and economic benefits reaches 2.8 million per year.The transformation is a typical application example of the＂more crushing less grinding＂ in the production,has a certain reference for process re-engineering in the old beneficiation system.