不同矿种H2-C熔融还原过程中CaO-SiO2-Al2O3-MgO系熔渣的起泡行为

 在1400℃下，通过300kg级氢碳熔融还原热模拟试验，用渣线测定装置研究了不同矿种在氢碳熔融还原过程中CaO-SiO2-Al2O3-MgO系熔渣的起泡行为，测定了熔渣的起泡高度、泡沫渣厚度、熔渣起泡率等参数。通过计算得到了气泡大小和熔渣的物理化学性质。结果表明，泡沫渣厚度随表观气体流速(反应速率)的增加而增加，表观气体流速相近时又随熔渣的黏度增大而增加。熔渣起泡率最高的矿种为生矿，为3.4。通过对泡沫渣厚度的因次分析，得到了泡沫渣厚度与熔渣黏度、密度、表面张力、气体表观流速、气泡大小及重力加速度的关系。

Study on Foam Bubble Formation of Different Minerals in CaO-SiO2-Al2O3-MgO Slag Smelting Reduction by Hydrogen-Carbon

Based on the thermal simulation experiment of 300 kg hydrogen-carbon smelting reduction,the foaming behavior of different minerals in CaO-SiO2-Al2O3-MgO slag smelting reduction by hydrogen-carbon at 1 400 ℃ was quantitatively investigated with the device of measuring slag line,foaming parameters such as foaming ratio,foaming height and foaming thickness were determined.In addition,the value of slag properties and bubble size were calculated.It is found that with increase of the superficial gas velocity,and also the viscosity of slag,the foaming ratio and thickness increases.The value of obtained foaming ratio of raw iron ore is 3.4,which is highest.The relationship among foaming thickness of molten slag,viscosity of slag,surface tension,density of slag,superficial gas velocity,bubble size and acceleration of gravity is obtained by the result of dimensional analysis.