【摘要】 通过分析了水钢100 t顶底复吹转炉炉衬的损坏机理和影响炉渣熔化性能的因素,得出每1%V₂O₅降低炉渣熔化温度27℃,每增加1%TiO₂含量,炉渣半球温度约降低5℃,当炉渣TFe含量在20%以上时,炉渣熔化温度在1 320¹ 395℃。通过采取铁水捞渣工艺;建立转炉热平衡操作模式,提高拉碳率;铁水Si在0.6%⁰.8%时,采用单渣操作,铁水Si>0.8%时,采用双渣操作;建立转炉最佳炉型及控制措施;优化钢水温度制度和优化脱氧合金化制度,降低出钢温度;在补吹提枪前加入适量焦丁,确保冶炼终点炉渣中FeO保持较低含量,提高溅渣护炉效果等工艺措施,结果使转炉炼钢的耐火材料消耗降到8.75 kg/t钢,转炉炉龄达到29 336炉。更多还原

【Abstract】 With analysis on damage mechanism of lining of 100 t top and bottom combined blowing converter at Shuisteel and influence factors on slag melting performance,it is obtained that with containing per 1%V₂O₅ content in slag the slag melting point drops by 27 ℃,with adding per 1%TiO₂ content the hemisphere temperature of slag decreases by about 5 ℃,and as TFe content in slag is more than 20%,the range of melting temperature of slag is 1 320 1 395 ℃.With taking the measures including hot metal fishing-slag process;establishing converter thermal equilibrium operation mode to increase the rate of carbon-catching;using single-slag operation as Si content in hot metal is 0.6%⁰.8%and using double-slag operation as Si content in hot metal is more than 0.8%;establishing converter optimum converter lines and control measures;optimizing molten steel temperature schedule and deoxidizing-alloying scheme to decrease the temperature of steel;and adding appropriate amount of nut coke before reblowing rising oxygen lance to ensure lower FeO content in end slag and improve effect of slag splashing for furnace maintenance,the consumption of refractory of converter steelmaking decreases to 8.75 kg/t and life of converter is up to 29 336 heats.更多还原