武钢大型转炉顶底复吹控制实践  

Practice of combined blowing of large converter in WISCO

作　　者：刘路长[1] 肖邦志[1] 饶江平[1] 杨松[1] 梁明强[1] 

机构地区：[1]武汉钢铁集团公司炼钢总厂三炼钢厂,湖北武汉430080

出　　处：《炼钢》2016年第5期20-24,共5页Steelmaking

摘　　要：武钢三炼钢厂对转炉氧枪喷头参数及底吹流量进行了优化,转炉吹炼过程中喷溅发生频率由3.4%降低到1.5%,吹炼终点炉渣TFe质量分数由15.99%降低到15.49%,达到了较好的吹炼效果。通过激光测厚监视炉底厚度,延长可见透气砖寿命达4 000炉,提高底吹气体流量至1 100 m^3/h,在8~16个可见透气砖条件下,转炉的碳氧积在0.001 5~0.001 8,达到了较好的冶金效果。四炼钢厂优化了氧枪喷头参数及过程操作枪位,解决了废钢熔化问题。通过大气量后搅试验,优化了后搅模式,在4个可见透气砖条件下,后搅流量为500 m^3/h,后搅时间为3~4 min,平均每分钟降低钢水氧质量分数20.47×10^(-6),降低碳质量分数29.23×10^(-6)。The parameters of converter oxygen lance nozzle and the bottom blowing flow rate were optimized in No. 3 of General Steelmaking Plant of WISC0. The splashing frequency decreased from 3.4 % to 1.5 % in blowing process, the slag TFe mass fraction reduced from 15.99 % to 15.49 % at the end point of blowing, good blowing effect was achieved. At the condition of monitoring the bottom thickness by laser measuring thickness, extending visible porous brick life up to 4 000, improving the bottom blowing gas flow to 1 100 m^3/h, using 8~16 visible porous bricks, [%C]. [%0] was in 0. 001 5-0. 001 8 at blowing end, which achieved better metallurgical effects, The parameters of oxygen lance nozzle and the lance profile in blowing process were optimized in No. 4 Steelmaking Plant, the problem of scrap melting was solved. The stirring mode was optimized through the large gas flow stirring test at the end blowing. When using 4 visible porous bricks and stirring flow 500 m^3/h, stirring time for 3~4 minutes, the mass fraction of oxygen reduced 20.47×10^-6 average per minute in molten steel, the mass fraction of carbon reduced 29.23× 10^-6 average per minute.

关 键 词：喷头参数 底吹 透气砖 碳氧积 

分 类 号：TF729[冶金工程—钢铁冶金]