Hydraulic experiment on mushroom head in bottom-blown smelting furnace

作     者：Fu-yong Su Zhi Wen 

作者机构：School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2017年第24卷第5期

页      面：490-494页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 080601[工学-冶金物理化学] 

基　　金：supported by the Fundamental Research Funds for the Central Universities(No.FRF-TP-15-022A3) 

主　　题：Bottom-blown smelting furnace Mushroom head Hydraulic experiment Thermal equilibrium Similarity criterion 

摘      要：There are many bottom-blown smelting furnaces in metallurgical industry. When oxygen or air sprays from the jet nozzle into the bottom of the furnace, the melting phase will be frozen and a hemispherical porous zone with a mushroom head shape will be formed around the nozzle. The mushroom head can pro- tect the jet nozzle and mitigate the liquid spray on the surface of melt. In order to analyze the formation process of a mushroom head in the bottom-blown smelting furnaces, a hydraulic experiment system was designed and the formation of the mushroom head was investigated by hydraulic experiment. The hydrau- lic experiment results show that the formation process is mainly divided into generating crushing genera- ting process and stable mushroom head generation process. The formation of stable mushroom head re- quires certain thermodynamic condition and water splash is more intense without a mushroom head than with a mushroom head. The size, porosity and diameter of the mushroom head are affected by the flow rate, temperature and heat capacity of the bottom-blowing gas and the temperature of the superheat and the physical parameters of the melt.