国外1995年发表的世界22座铜矿山1994年的生产量及生产成本资料如表1所示。这些矿山都是采用常规的工艺流程,包括露天开采或地下开采,浮选方法处理,产品为铜精矿。其中8座矿山为露天开采,7座矿山为地下开采,7座矿山既有露天开采 Table 1 shows the production volume and production cost data of 22 copper mines in 1994 published in 1995 in the world. These mines are using conventional processes, including open pit mining or underground mining, flotation treatment, the product is copper concentrate. Eight of the mines are open pit mining, seven mines are underground mining, and seven mines have both open pit mining