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废金属和好金属是相对的,都是一种金属材料,虽然形态各异,但其性质却不变。废金属不仅具有价值,而且也有新的使用价值。可以说,废金属是个宝。以废钢铁为例,回收利用废钢铁有不少好处: 1、使用1吨废钢炼钢,可节约1吨生铁。如果建一座年产1000万吨生铁的炼铁厂需投资70亿元,建设周期需4～5年。因此,用废钢铁炼钢可节约矿源、能源,投资少、见效快。用废钢铁炼钢比用矿石炼铁再炼钢,
Scrap metal and good metal are relative, are a kind of metal material, although different in form, but its nature is the same. Scrap metal not only has value, but also has new use value. Can be said that scrap metal is a treasure. Taking scrap steel as an example, recycling scrap steel has many benefits: 1. It can save 1 ton of pig iron by using 1 ton scrap steelmaking. If you build an annual output of 10 million tons of pig iron ironworks need to invest 7 billion yuan, the construction period of 4 to 5 years. Therefore, using steel scrap steel can save mineral resources, energy, less investment, quick. Steel scrap with steel than steel with iron ore refining,