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一、用地方生铁生产稀土—镁球铁的特点地方生铁,尤其是江南地方生铁含S、P高,用其生产球铁时,球铁的球化率低、球墨衰退快、易出现冷脆和大量夹渣现象。因为湘钢生铁化学成分稳定,质量较好,所以,我厂采用湘钢生铁生产球铁。为了控制原铁水的化学成分,炉料中加入回炉球铁20～40％;为降低磷加入10％的低磷
First, the use of local pig iron production of rare earth - the characteristics of magnesium iron ductile iron local pig iron, especially in the southern part of pig iron containing S, P high, with its production of ductile iron, ductile iron ball rate is low, Mexican ink declines quickly, prone to cold crisp And a large number of slag phenomenon. Because of the stable chemical composition of Xiangtan pig iron, good quality, therefore, I plant the production of ductile iron pig iron. In order to control the chemical composition of the original hot metal, the furnace charge is added with 20-40% of the ductile iron; 10% phosphorous is added to reduce the phosphorus