莱钢高铁水比转炉冶炼工艺实践

Smelting Process Practice of the Converter with High Hot Metal Ratio in Laiwu Steel

莱钢在转炉工序采用高铁水比装入制度,由于造渣制度及枪位控制不合理、炉型控制不当及铁水流冲击,导致喷溅加剧,兑铁位侵蚀。通过优化造渣工艺、枪位控制及溅渣护炉工艺,喷溅渣量由25.5kg/t降至17.5kg/t,钢铁料消耗由1069.5kg/t降至1064.0kg/t,耐材消耗由0.42kg/t降至0.20kg/t,氧枪寿命由210炉提高至325炉。

Laiwu Steel adopted the loading system with high hot metal ratio in the converter procedure.The improper slagging system,lance position control and furnace type control and hot metal flow impact lead to increased splashing,even the iron-bit erosion.By optimizing the slagging process,the lance control and slag splashing process,splash volume was decreased from 25.5 kg/t to 17.5 kg/t;the amount of steel consumption from 1 069.5 kg/t to 1 064.0 kg/t and the refractory consumption from 0.42 kg/t to 0.20 kg/t.In addition,the working life of oxygen lance was increased from 210 heats to 325 heats.