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我厂4号300米~3高炉,通常冶炼15％的铸造铁和85％的制钢铁。S负荷较高,一般为7—9公斤/吨,且原料含S波动大,占含铁原料80％以上的烧结矿,含硫波动在0.05—O.38％之间。这对产品合格率威胁很大。 为了获得含S合格的产品,操作中经常要根据S负荷的变化,调整炉温和碱度。这样,不仅人为地造成了热制度和造渣制度的波动,而且再提高碱度也是有限度的。从CaO—SiO_2—Al_2O_3—MgO四元系等熔图上看,我厂炉渣在CaO/SiO_2接近或大于1.3时,等
I plant on the 4th 300-300 blast furnace, usually cast 15% of the cast iron and 85% of the steel. S load is high, usually 7-9 kg / ton, and the raw material with large fluctuations in S, accounting for more than 80% of iron ore sinter, sulfur fluctuations between 0.05-O.38%. This is a great threat to the passing rate of the product. In order to obtain S qualified products, the operation is often based on S load changes, adjust the furnace temperature and alkalinity. In this way, not only artificially caused fluctuations in the thermal regime and slagging regime, but also raise the alkalinity is limited. From the CaO-SiO_2-Al_2O_3-MgO quaternary melting diagram point of view, I plant slag in the CaO / SiO_2 close to or greater than 1.3, etc.