转炉炼钢少渣冶炼技术的探索实践

Practice and exploration of less slag steelmaking technology in BOF

介绍转炉少渣冶炼、炉渣热循环利用实践。可分两个阶段,脱碳出钢留渣、冶炼中期脱磷倒渣留渣与脱碳出钢留渣同时进行(留渣+双渣)。脱碳留渣冶炼,通过出钢后倒渣、调渣过程控制,抑制留渣造成吹炼前期的喷溅。留渣冶炼使吨钢石灰消耗降低28.6%。"留渣+双渣"试验,控制转炉前期炉渣碱度及全铁,选择合适脱磷渣倒炉点及温度,保证前期渣脱磷率和泡沫化,最终前期脱磷率大于60%,排渣率大于50%。"留渣+双渣"技术,吨钢石灰消耗降低46.9%。

The exploration and practice of converter less slag steelmaking, converter slag thermal recycling technology were described. The technology can be divided into two stages, one were remaining decarbonization slag in BOF, the other were remaining after dephosphorizing slag in BOF（ Slag-Remaining ＆ Double-Slag）. Slag-Remaining, leaving the amount of slag is precisely controlled by controlling BOF process and the precise amount of steel slag and slag composition adjustment. Consumption of lime per ton of steel has been reduced by 28. 6% since Slag-Remaining technology adopted. ＂Slag-Remaining ＆ Double-Slag＂ technology production test was performed. Early dephosphorization rate and slag foaming process have been effectively implemented by controlling the BOF slag alkalinity and total iron, choosing a suitable pour point and temperature. Slag-Remaining ＆ Double-Slag process path, Effect embodiment, the final the average dephosphorization rate was greater than 60%, the slag poured rate was greater than 50%. Consumption of lime per ton of steel has been reduced by 46.9% since the technology adopted.