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在煤炭和动力工业企业中,每年以电站灰渣、剥离脉石和选煤尾矿的形式产生18亿吨废料。收集、清除和贮存每一吨废料花费3.5卢布。这些废料通常为石英砂和高岭质粘土,可作为玻璃,陶器、铸造等许多生产部门的原料。同时,上述有用矿物是由150个专业化露天采矿场开采的,这些露天矿不能充分满足对这类原料的需求。例如,据我们计算,苏联每年的型砂、玻璃砂、耐火粘土和精选高岭土的产量分别比需求量短缺150万吨、100万吨和50万吨。
In coal and power industry enterprises, 1.8 billion tons of wastes are produced each year in the form of power station ash, stripping gangues and coal dressing tailings. It costs 3.5 rubles to collect, remove and store each ton of waste. These wastes, usually quartz sand and kaolin clay, can be used as raw materials for many production sectors such as glass, pottery, casting and the like. At the same time, the above useful minerals are mined by 150 specialized open pit mines that do not adequately meet the demand for such raw materials. For example, according to our calculations, the annual output of sand, glass sand, refractory clay and selected kaolin in the Soviet Union is 1.5 million tons, 1 million tons and 500,000 tons less than the demand respectively.