硅钙合金球在430不锈钢冶炼中的应用

The Applications of the Calcium Silicon Alloy in 430 Stainless Steel during Smelting Process

摘要: 在AOD出钢过程中随钢流加入硅钙合金球，研究硅钙合金球对430不锈钢钢水质量的影响。结果表明：硅钙合金球对改善AOD炉渣流动性有一定作用；使用硅钙合金球的炉次跟未使用的炉次相比，AOD出钢前后全氧的降低量大6 ppm，AOD出钢后炉渣中的Cr2O3含量低0.07%；使用硅钙合金球的炉次，钢水中夹杂物类型为CaO-SiO2-Al2O3，中包中夹杂物尺寸以0~10 μm为主。

Abstract: Calcium silicon alloy was added into the liquid steel with steel flow after AOD refining, and the ef- fect of the calcium silicon alloy on the steel quality was studied. The results show that adding cal- cium silicon alloy has a role of improving slag fluidity. The decreased value of total oxygen before and after AOD tapping is 6 ppm more than that of unused calcium silicon alloy, and the Cr2O3 con- tent of slag after the steel tapping is down 0.07%. The inclusion type in the steel using calcium sil- icon alloy is mainly CaO-SiO2-A12O3, and the inclusion size in the tundish is mostly 0 - 10 μm.