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为减少低碳低硅钢冶炼过程增硅,通过工业试验对武汉钢铁股份有限公司CSP流程精炼过程硅含量控制作了分析。结果发现:钢水增硅主要发生在LF精炼过程,除转炉下渣量和钢水AlS含量外,钙处理工艺也是影响钢水增硅的重要因素。热力学计算也表明:精炼结束时钢水中AlS与渣中SiO2反应未达到平衡,增硅还会继续进行;钢水中钙对渣中SiO2的还原能力远大于AlS;通过调整精炼渣中SiO2含量,可减缓钢水增硅。
In order to reduce the silicon addition during the smelting of low-carbon and low-silicon steel, the control of silicon content in the CSP process of Wuhan Iron and Steel Co., Ltd. was analyzed through industrial experiments. The results showed that the silicon addition mainly occurred in the LF refining process. In addition to the amount of slag and the AlS content in the molten steel, the calcium treatment process was also an important factor that affected the silicon addition in the molten steel. The thermodynamic calculation also shows that the reaction between AlS in the molten steel and the SiO2 in the slag does not reach equilibrium at the end of the refining and the silicon addition will continue. The reduction ability of calcium in the molten steel to SiO2 in the slag is far greater than that of AlS. By adjusting the SiO2 content in the slag, Slow steel by silicon.