Mk对调质高炉渣制备矿渣棉过程中熔渣性能影响

利用铁尾矿进行高炉渣调质实验，研究了酸度系数(M_k)对调质高炉熔渣析晶性能、黏度及表面张力的影响.结果表明:随M_k的增加，调质熔渣的析晶温度明显降低，当M_k高于1.4时熔渣温度降至1100℃，体系仍为无序玻璃相;随M_k的增大，调质熔渣黏度对温度变化的敏感性逐渐减弱，适宜成纤黏度范围对应的温度区间逐渐增大，适宜成纤黏度范围内最低成纤温度与析晶温度之差Δt=(_○t_○w-_○t_○l)逐渐增大，当M_k为1.2时Δt为101.7℃;在调质熔渣适宜成纤温度范围内，M_k对熔渣表面张力的影响不大，熔渣表面张力与黏度的比值σ/η(表征熔渣成形难易程度)随M_k的增大逐渐减小.

Effect of Mk on Slag Properties in the Process of Preparing Slag Wool from Modified-Blast-Furnace-Slag

Blast furnace slag modifying experiments using iron tailings were conducted to investigate the effect of acidity coefficient(M_k)on crystallization property， viscosity and surface tension of modified-blast-furnace-slag. The results indicated that crystallization temperature of modified slag significantly decreases with the increase of M_k and the slag system is still unordered glass phase with slag temperature decreasing to 1100℃ when M_k is above 1.4. The sensitivity of slag viscosity to temperature change gradually decreases， the temperature range corresponding to theoretically suitable fiber-formation-viscosity range of slag wool gradually increases， and the difference between minimum fiber-formation-temperature and crystallization temperature in suitable fiber-formation-viscosity range(Δt=(t_○w-t_○l))， which is only 101.7℃ when M_k is 1.2， gradually increase with the increase of M_k. The effect of M_k on surface tension of slag is small and the ratio of surface tension to viscosity， σ/η， symbolizing difficult degree of slag-forming， gradually decreases with the increase of M_k in suitable fiber-formation-temperature range.