材料期刊网

进行了120 t转炉半钢炼钢复吹研究，研究结果表明：透气砖数量越多，复吹效果越好。采用6块透气砖，吹炼终点钢中w(［O］)达527×10-6，渣中w((TFe))达19.52%，w( ［C］ )· w(［O］)达0.0022%。底吹流量005 m3/(min·t)后搅3 min，同时加入50～100 kg含碳材料，终点钢水氧活度降低146.8×10-6。确定合理废钢加入量的原则是以终点钢水C来控制终渣TFe。采用合理的透气砖维护工艺，确保形成稳定的“炉渣蘑菇头”是提高透气砖寿命的关键，使透气砖寿命从1000～2000炉提高到6000炉以上。

Through analysis on the production situation of the 120 t combinedblowing converter of semisteel, it indicated that the effect of bottom blown has been increased by addition of quantity of bottom nozzle. Using of 6 bottom nozzles, the w(［O］) in steel touched bottom of 527×10-6 ; the w(TFe) in the slag touched bottom of 19.52％ and w(［C］)·w(［O］) product touched bottom of 0.0022％. If the time of later stirring was 3 minutes by 0.05 m3/(min·t) of the bottomblowing gas supply parameters and 50100 kg joined containing carbon; the ［O］ in steel is decreased by 146.8×10-6. The quantity of joined scrap steel was by the principia that ［C］ in the molten steel control the TFe in the slag. It is the key to raise bottom nozzle life that the rational maintaining technology of bottom nozzle is used so as to form a stable “slag mushroom”on the top of bottom nozzle. As a result, bottom nozzle life was already above 6000 heats from 10002000 heats.