论文部分内容阅读
为了更好降低钢中回磷量,结合现场试验计算得出转炉出钢至精炼结束钢水回磷量、合金及辅料带入钢液的磷含量和转炉的下渣量,检测分析了各阶段炉渣成分和温度对精炼回磷的影响。结果表明:合金回磷和下渣回磷在总回磷中占主导地位,采取使用低磷合金及减小下渣量能有效减少总回磷量。转炉终点温度控制在1 620℃左右,终渣FeO含量达到15%以上,可降低转炉出钢下渣引起的回磷。精炼过程中合理控制炉渣碱度,控制前期精炼渣FeO含量在0.25%~0.45%,可以有效抑制钢液回磷。
In order to better reduce the amount of phosphorus in the steel, combined with field tests calculated the amount of molten steel from the tapping furnace to the end of the refining amount of phosphorus, the phosphorus content of the alloy and auxiliary materials into the molten steel and the amount of slag under the converter, detection and analysis of the various stages of slag Effect of composition and temperature on refining and rephosphorization. The results show that alloy Phosphorus return and Slag return Phosphorus dominate total phosphorus recovery. The use of low phosphorus alloy and the reduction of the amount of bottom slag can effectively reduce the total amount of Phosphorus return. Converter end temperature control at about 1 620 ℃, final slag FeO content of 15% or more, can reduce slag from the converter slag caused by phosphorus. During the refining process, the basicity of slag is controlled reasonably, and the content of FeO in the pre-refining slag is controlled at 0.25% ~ 0.45%, which can effectively restrain the phosphorus recovery of molten steel.