采矿和冶金工业的产量大幅度增长、贫矿床的开采和高灰分煤需要量的增加,都使工业废料同时增加;目前大部分废料都未广泛用于国民经济,而堆置在堆场中,占用土地。工业废料堆存的问题越来越严重。目前,仅黑色冶金工业渣场就占用了4000公顷(1公顷=10000m~2)左右的土地,堆存有2亿t以上的高炉渣和1亿t炼钢渣。每年都有大量的白云石、页岩和粘土等剥离物及选厂尾矿运至排土场与尾矿库。 The output of mining and metallurgical industries has risen sharply. Both the mining of lean deposits and the increase of high-ash coal demand have resulted in the simultaneous increase of industrial wastes. At present, most of the wastes are not widely used in the national economy and are stacked in the yard, Occupied land. The problem of industrial waste storage is getting worse. At present, only 4,000 hectares (1 hectare = 10000m ~ 2) of land is occupied by the black metallurgical industrial slag yard, with more than 200 million tons of blast furnace slag and 100 million tons of steelmaking slag. Every year, a large number of pendants such as dolomite, shale and clay, as well as tailings from the mill are transported to the dumps and tailings ponds.