Experiment on Synthetic Slag for Si-killed Steel Desulphurization
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摘要: 钢包炉精炼脱硫过程中顶渣起着非常重要的作用。对硅镇静钢冶炼,为防止钢液回铝,特选择不含铝的脱硫合成渣系CaO-SiO2-CaF2,实验室研究结果表明:初渣成分为CaO 66%、SiO2 17%、CaF2 15%、Si 2%的渣系熔化温度最低,化渣最快,脱硫速度最高,10 min就把硫从0.008%降到0.001%,脱硫效率高,能满足高效连铸的要求。Abstract: Top slag plays a very important role for desulphurization during ladle refining.To prevent[Al]increasing,a synthetic slag without alumina (CaO-SiO2-CaF2)has been chosen for Si-killed steel.The laboratorial results show that the synthetic slag with initial composition of CaO 66%,SiO2 17%,CaF2 15% and Si 2% has high desulphurization speed and efficiency.The desulphurization time from 0.008 % to 0.001% is only 10min,this can satisfy the need of high performance casting.
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Key words:
- ladle refining /
- desulphurization /
- Si-killed steel /
- synthetic slag
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