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废金属是国家的重要物资资源,是炼钢、铸造、轻工、市场小商品生产的重要原料。搞好废金属的回收利用,一可变废为宝,把废金属转化为新的生产要素,扩大社会资源;二可节省矿产资源和能源,促进国民经济的发展。据统计,利用一吨废钢铁炼钢,可节省铁矿石4吨、焦炭0.68吨、石灰石0.28吨。据国外专家分析,按目前开采水平计算,铁矿石资源仅够开采200年,200年后炼钢资源就得靠废钢铁的循环回收利用。目前工业发达国家炼钢利用废钢铁比例达50～70%,
Scrap metal is an important national material resources, is an important raw material for steelmaking, foundry, light industry, market commodity production. Make good use of scrap metal recycling, a variable waste treasure, the scrap metal into new production factors, expand social resources; two can save mineral resources and energy, and promote the development of national economy. According to statistics, the use of a ton of steel scrap steel can save 4 tons of iron ore, 0.68 tons of coke, 0.28 tons of limestone. According to the analysis of foreign experts, according to the current mining level calculation, the iron ore resources are enough to mine for 200 years. After 200 years, steelmaking resources have to rely on recycling of scrap steel. At present, the industrialized countries use 50% to 70%