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本文介绍了从不同方面减少稀土消耗的技术。采用局部石灰石炉衬碱性冲天炉可使原铁水含硫量降低约30％,炉渣中FeO含量<3％,从而处理每吨铁水可节约稀土球化剂或蠕化剂费用约五十无人民币;改进稀土合金特性,在稀土硅铁合金基础上加入适量锌、铝等元素可使稀土相对吸收率提高30％以上;采用改进的加盖铁水包,可使稀土合金吸收率提高5～10％。
This article describes techniques to reduce rare earth consumption from different aspects. The use of local limestone lining alkaline cupola can reduce the sulfur content of the original hot metal about 30% FeO content in the slag <3%, thus processing per ton of hot metal can save rare earth nodulizer or vermiculite cost about 50 yuan; Improve the characteristics of rare earth alloys, the addition of the right amount of zinc, aluminum and other elements based on the rare earth ferrosilicon alloy can increase the relative absorption rate of rare earth by 30% or more; using improved capping ladle, the rare earth alloy absorption rate can be increased by 5 to 10%.