70t电炉热装铁水的实践与进步

Practicing and Progressing of Hot Charging Melted Iron in 70t Electric Furnace

电炉热装铁水是冶炼纯净钢的最佳途径 ,兑加铁水的方式主要有 :加入废钢后用行车吊起铁水罐直接从炉顶兑入 ;用专用铁水流槽从炉门兑入 ;从炉壁的特定位置用专用装置兑入。八钢电炉厂 70t电炉炼钢一直采用顶兑铁水的方式 ,兑入时间一般是第一批料入炉后。通过采取改进操作、优化脱碳、增加供氧强度及提高功率因数等措施 ,热兑铁水比例增加了 10 %～ 2 5 % ,电耗下降 5 0～ 70kW h/t,冶炼时间缩短 1～ 3min。

Hot charging melted iron in electric furnace is a best method for producing purified steel. Hot metal charging methods mainly have after scraps charging adding melted iron from top of electric furnace, adding melted iron from the furnace door through special iron trough, adding melted iron with special device from the special position of furnace wall. 70t electric furnace of Bagang Electric Furnace Plant is adopting to add melted iron from top of electric furnace unite now and the adding time general is after first batch into electric furnace. Through adopting some measures, such as improving operation, optimizing decarburizing, increasing oxygen supply and improving power factor, etc, the hot metal charging ratio is increased by a factor of 10%～25%, the power consumption is decreased by 50～70 kW.h/t and melting time of electric furnace is reduced 1～3 min.