米申铜矿开始投产时的生产能力为15000短吨/日,后来扩大到额定能力为22500短吨/日,但是实际能力大大超过这个标准。米申铜业公司的扩建工作预计在1989年1月完成,工程投资估计为1310万美元,此时的选矿厂能力将提高到41000短吨/日。计划将最大限度利用米申公司现场修复的备用设备和美国冶炼与精炼公司在附近已关闭的矿山存下的设备。 The Mishin copper mine started production at a capacity of 15,000 short tons / day and later expanded to a capacity of 22,500 short tons per day, but its actual capacity far exceeded this standard. The expansion of MISIC Copper is expected to be completed in January 1989 with an estimated investment of $ 13.1 million and the concentrator capacity will increase to 41,000 short tons / day. The plan is to maximize the use of spare equipment repaired on site by MISIC and equipment stored by the US smelter and refining company at mines that have been closed in the vicinity.