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采用高温硅钼炉和常规化学分析法对高硫含量的硅锰合金进行了系列脱硫研究,分析了CaO-BaO-MgOSiO2-CaF2渣系中MgO、CaO、BaO含量的变化对脱硫效果的影响。结果表明:当MgO的质量分数大于8%时,脱硫率会随着MgO含量的增加而升高。用(MgO+CaF2)代替CaO不利于脱硫;用(MgO+CaF2)代替质量分数为0~4%的BaO有利于渣系脱硫,但代替量过多时不利于脱硫。得到了最佳硅锰合金脱硫的渣系,wCaO/wBaO为1.25时脱硫率最高。
A series of desulfurization experiments were carried out on the high-sulfur content Si-Mn alloy by high-temperature silicon molybdenum furnace and conventional chemical analysis. The effect of the content of MgO, CaO and BaO in CaO-BaO-MgOSiO2-CaF2 slag system on the desulfurization effect was analyzed. The results show that when the mass fraction of MgO is more than 8%, the desulfurization rate will increase with the increase of MgO content. The use of (MgO + CaF2) instead of CaO is not conducive to desulfurization; (MgO + CaF2) instead of mass fraction of 0 ~ 4% of BaO desulfurization slag system, but the replacement of too much is not conducive to desulfurization. The best slag system for desulfurization of Si-Mn alloy was obtained. When wCaO / wBaO was 1.25, the desulfurization rate was the highest.