铁水熔池传热过程的实验研究

INVESTIGATION OF HEAT TRANSFER PROCESS IN IRON BATH

在容量为１００ｋｇＥＯＦ实验炉（能量最优化炉）中，实验研究了铁水熔池上部煤气温度及成分的变化，以及熔融铁水的温度变化，并由铁水熔池传热机制出发建立了传热效率的计算方法。实验证实，铁水熔池采用薄渣层冶炼工艺时，将二次燃烧产生的热量传向铁液，渣滴起着重要的作用。适量空气的进入，可以取得较高的二次燃烧率，并且可以抑制过高的炉顶煤气温度，取得较高的传热效率，同时延长炉衬寿命；通过顶枪、侧枪吹氧，可以提高搅拌能，提高传热效率。

The experiment in EOF(energy optimization furnace)with 100 kg iron has been carried out.The gas temperature and content in the iron bath and the molten iron temperature were measured.The calculating method of the heat transfer efficiency has been established based on the mechanism of the heat transfer in the iron bath. It is true that the slag drop plays an important role in transferring heat from post-combustion to molten iron with a thin slag layer. The suitable quantity of leaked in air can enhance the heat transfer efficlency and decrease the top gas temperature,that results in prolonging the service life of the furnace lining. The oxygen injection by top lance and side lance can increase the effective stirring power and enhance heat transfer efficiency.