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一、据了解江苏镇江地区有七个小铁厂(包括锰铁厂)年产铸造生铁十万吨,锰铁一万吨。投炉炼铁原料组成有铁矿石,铁精矿,转炉粉尘,锻轧钢的氧化铁皮,钢铁屑,钢渣,硫酸渣,废铁块,还有少量废钢等九种原料。除铁矿石和铁精矿外,其他均称为“代用矿物”。1979年炼铁,铁矿石和精铁矿占原料的56％,代用矿占44％;1982年上半年的原料中,铁矿石和铁精矿占24.8％,代用矿占75.2％(见下表)。
First, it is understood that there are seven small iron mills (including ferromanganese plants) in Zhenjiang, Jiangsu Province, with an annual output of 100,000 tons of pig iron and 10,000 tons of ferromanganese. Smelting furnace raw materials composed of iron ore, iron ore, converter dust, forged steel oxide scale, steel scrap, slag, sulfuric acid residue, scrap iron, there are a small amount of scrap and other nine kinds of raw materials. In addition to iron ore and iron ore concentrate, the others are called “alternative minerals.” Iron ore, iron ore and refined iron ore accounted for 56% of raw materials and 44% of substitute ore in 1979. Of the raw materials in the first half of 1982, iron ore and iron concentrate accounted for 24.8% and alternative deposits accounted for 75.2% (see table below ).