苏联有用矿物丰富。仅从哈萨克斯坦矿藏中每年回收3.6亿吨以上有价原料。且投入矿物资源经济周转的规模还会增长。但是在国民经济中黑色金属生产的发展基本上靠贫矿和难选矿床的开采来实现。因此,选厂入选的原矿量不断增加(目前约增70%)。同肘矿床开采也复杂化了,矿石中有用成分品 The Soviet Union is rich in useful minerals. Only 360 million tons of valuable raw materials are recovered annually from Kazakhstan’s mineral deposits. And the scale of economic turnover into mineral resources will grow. However, the development of ferrous metal production in the national economy is basically based on the exploitation of poor and refractory deposits. As a result, the number of ore concentrates selected for the plant has been steadily increasing (currently about 70%). Mining with the elbow is also complicated, useful components of ore products