低碳低硅SPHC鋼精煉渣優化研究

Optimization of the refining slag composition of SPHC steel with low silicon low carbon

摘要: 為改善SPHC鋼LF精煉效果,本研究首先利用Fact Sage熱力學計算軟件,分析了SPHC鋼LF精煉渣系的理化特性,提出相應的精煉渣優化方案,并進行了工業實驗驗證.研究結果顯示,通過對LF精煉渣系的優化,出站時鋼中全氧TO由優化前的24×10^-6下降至優化后的20×10^-6,顯微夾雜物總數去除率由優化前的56.57%增加至優化后的71.54%,大型夾雜物數量也由原來的85.42 mg/10 kg下降至42.45 mg/10 kg.

Abstract: To improve the effect of LF refining on SPHC steel, thermodynamics software FactSage was used to analyze the physi-cochemical properties of the LF refining slag system, and then the corresponding optimization scheme was verified by industrial verifi-cation. Experimental results show that at the end of LF refining, the total oxygen TO in steel decreases from 24×10^-6 to 20×10^-6, the total removal rate of micro inclusions increases from 56.67% to 71.54%, and the amount of large inclusions decreases to 42.45 mg/10 kg from 85.42 mg/10 kg by the optimization of the LF refining slag system.