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利用高磷生铁在大型固定式500吨平炉炼钢,除了目前包钢平炉以外,世界上还是没有的。从一些资料说明,利用高磷生铁炼钢,多用转炉吹炼,在倾动式平炉上,亦有利用“塔尔博法”、“留渣法”、“二重法”冶炼。但是,这些方法的生产组织困难,基建投资高,而且使平炉的生产能力大为降低。包钢大型固定式500吨平炉在设计上是采用含磷0.14%的铁水炼钢的,但由于高炉直接装入富矿所以铁水中含磷、锰和矽均高:磷0.70～0.80%,锰1.13～1.77%,矽0.88%～1.2%。虽然国外也有用高磷生铁在平炉炼钢〔2〕但包钢原材料条件与国外不同,而且又在不易控制放渣的大型固定式平炉中冶炼,因此主要靠摸索。几年来,在去磷
The use of high-phosphorus pig iron in large fixed 500-ton open hearth steelmaking, in addition to the current Baotou flat furnace, the world is still not. From some sources, the use of high-phosphorus pig iron steelmaking, multi-purpose converter blowing, pouring open hearth furnace, but also the use of “Talbo Law”, “residue dross method”, “double” smelting. However, the production and organization of these methods are difficult, the capital investment is high, and the production capacity of the hearth furnace is greatly reduced. The large, fixed, 500-ton open hearth of Baotou Steel is designed to be steel-made with a molten steel containing 0.14% phosphorous. However, since the blast furnace is directly charged with rich ore, the molten iron contains phosphorus, manganese and silicon in all: 0.70-0.80% phosphorus and 1.13% manganese ~ 1.77%, silicon 0.88% ~ 1.2%. Although abroad, it is also useful to use high-phosphorus pig iron in open hearth steelmaking [2]. However, the raw material conditions of Baotou Steel are different from those in other countries and are smelted in large fixed-type hearth furnaces where it is not easy to control slag discharge. In recent years, to dephosphorization