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铁水去硫是钢铁冶炼过程中的一个问题.高硫铁水对炼钢生产不利,会使钢材质量降低,冶炼时间延长,设备的生产率降低,尤其对平炉、转炉冶炼优质钢时,脱硫更显得重要;在铸造方面:会使铸铁的机械强度降低、流动性减弱,白口程度与脆性增加以及对球墨化的可能性发生困难.铁水去硫问题,有的主张从原料就开始注意,在高炉内使用低硫的矿石和焦炭,多加锰矿,造成高温和高碱度的炉渣,以炼出低硫铁水;也有的主张不管铁水的含硫量,直接在炼钢炉中多加石灰,用多次造渣来脱硫.这两种办法都会提高成本和降低设备的生产率,有时会受到原料等条件的限制而行不通.故一般
Hot metal desulphurization is a problem in the process of steel smelting.High sulfur molten iron is unfavorable to the steelmaking production, which will reduce the quality of the steel, prolong the smelting time and reduce the productivity of the equipment, especially when the high- ; In the casting: will reduce the mechanical strength of cast iron, reducing mobility, white degree and increased brittleness and the possibility of nodularity difficulties.Steel sulfur desulfurization problems, some advocates from the raw material began to pay attention to, in the blast furnace The use of low-sulfur ore and coke, more manganese ore, resulting in high temperature and high alkalinity of the slag in order to refine the low-sulfur molten iron; also claim that regardless of the molten iron sulfur content, directly in the steel-making furnace more lime, Slag to desulfurization both of these methods will increase costs and reduce equipment productivity, sometimes subject to conditions such as raw materials and restrictions will not work.