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一、废钢铁再生利用的原则废钢铁在再生利用时,应当遵循下列原则: 1、资源、能源的最佳利用废钢铁是一种再生资源,它是能源的结晶。1吨普通碳素废钢相当于3～4吨铁矿石,1～1.5吨焦煤。其冶金价值相当于1吨生铁;其当量能值约1吨标准煤。对于合金废钢来说,视其品种和合金含量的多少,其冶金价值和当量能值一般都要超过普通碳素废钢的几倍乃至几十倍。资源最佳利用,就是要使同样数量、品种的废钢铁再生成为强度高、单位用料最省的产品。例如,把铁路报废的钢轨用作矿井的支架,价钱要比工槽角钢便宜一半,似乎合理。其实将旧钢轨改制成工槽角钢,在同
First, the principle of scrap steel recycling Scrap iron in the recycling, it should follow the following principles: 1, the best use of resources, energy scrap steel is a renewable resource, it is the crystallization of energy. 1 ton ordinary carbon scrap equivalent to 3 to 4 tons of iron ore, 1 to 1.5 tons of coking coal. Its metallurgical value is equivalent to 1 ton of pig iron; its equivalent energy value is about 1 ton of standard coal. For alloy scrap, depending on the variety and the amount of alloy content, the metallurgical value and equivalent energy value are generally more than ordinary carbon scrap several times or even several times. The best use of resources, is to make the same number of varieties of scrap steel regeneration into a high strength, the lowest unit of material products. For example, it seems plausible to use a railroad scrapped rail as a mine stand, which is cheaper by half than a slotted angle steel. In fact, the old rail system into a slot angle, in the same