铝矾土替代萤石对精炼渣脱硫去夹杂性能影响的实验研究

Study on the Effect of Desulfurization and Removing Inclusions by Making Refining Slag Using Bauxite Instead of Fluorite

摘要: 本文以CaO-Al₂O₃-SiO₂-MgO-CaF₂基础精炼渣系，通过加入铝矾土等量取代CaF₂，研究铝矾土替代萤石对精炼脱硫效果的影响。实验结果表明：铝矾土替代萤石造渣对钢液脱硫有良好的效果，碱度的增加和适量的铝矾土加入量，能够提高精炼渣的脱硫率，当CaO/SiO₂的比值在11~12，铝矾土的含量在4%~5%时，脱硫效果最佳，可达到80%以上；实验渣对钢中夹杂物的改性和去除也有良好的效果。

Abstract: In the study, the effect of bauxite instead of fluorite acting as flux in CaO-Al₂O₃-SiO₂-MgO refining slag on desulfurization efficiency was researched. The result shows bauxite replacing fluorite im-proves desulphurization efficiency. In a certain range, the addition of bauxite can reduce the con-tent of sulfur in liquid steel. When the CaO/SiO₂ ratio ranges from 11 to 12, and the content of bauxite is 4% - 5%, the desulfurization effect is best and can reach more than 80%. Besides, the slag has better property of modifying and removing inclusions.