Abstract: The effect of parameters including adding amount (650 〜950 kg) of desulfiirizer (/% ： 80. 55CaO, 0. 04S, 0. 01P, 4. 34SiO₂, 6. 06CaF₂, 0. 05H₂O) , stirring time (7 ~ 11 min) , stirring impeller rotating speed (90 〜110 r/min) and submerged depth of impeller (850 ~ 1 150 mm) on efficiency of KR desulphurization of 115 ~ 117 t hot metal (0. 03% ~ 0. 06% S, 1 250 〜1 350 ℃ ) has been statistic-analyzed and studied by using response surface method ( RSM), and a equation of regression model is obtained. Results show that with using the optimized parameters- adding amount of desulfurizer 820 kg, stirring for 9 min, rotating speed of stirring impeller 101 r/min and submerged depth of impeller in bath 985 mm, with hot metal KR desulphurization the predicted value of efficiency of desulphurization is 91. 99% , while the real measured value is 90. 18% , the relative error is 2. 0% ； with optimized desulphurization process the consumption of used desulfurizer decreases and the first qualified rate of metal increases from original 88. 35% to 95. 88%.

摘要： 运用响应曲面法（RSM-response surface method）统计分析和研究了脱硫剂（/%:80.55Ca，0.04S,0.01P，4.34SiO_2，6.06CaF_2，0.05H₂O）加入量（650~950 kg）,搅拌时间（7~11 min）,搅拌桨转速（90~110 r/min）,搅拌桨插入熔池深度（850~1 150 mm）等参数对115~117 t铁水（0.03%~0.06%S,1 250~1 350℃）KR法脱硫效率的影响,并得出回归模型方程。结果表明,采用脱硫剂加入量820 kg、搅拌9 min、搅拌桨的转速101 r/min、搅拌桨插入熔池的深度985 mm的优化工艺参数,进行铁水KR预脱硫,脱硫效率预测值为91.99%,实际值为90.18%,相对误差为2.0%;优化后脱硫工艺所使用的脱硫剂消耗有所降低,且产品的一次合格率从88.35%提高到95.88%。

关键词: 铁水预处理, KR脱硫, 脱硫效率, 响应曲面