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在1 400℃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。
At 1400 ℃, the foaming behavior of CaO-SiO2-Al2O3-MgO slag during the process of hydrogen-carbon smelting and reduction was studied by the 300kg-scale hydrogen-carbon reduction and reduction heat simulation test with slag line. The slag bubble height, foam slag thickness, slag blister rate and other parameters. The bubble size and the physicochemical properties of the slag were calculated. The results show that the thickness of foamed slag increases with the increase of apparent gas velocity (reaction rate), and increases with the increase of the viscosity of slag when the apparent gas velocity is similar. The highest rate of slag blistering ore mining, 3.4. The relationship between the thickness of foam slag and the viscosity, density, surface tension, apparent gas velocity, bubble size and gravitational acceleration was obtained through the factorial analysis of foam slag thickness.