高炉矿渣成棉的调质研究

分别以石英砂、粉煤灰、页岩作为高炉矿渣的成棉调质剂,通过改变调质剂的添加量来配制不同酸度系数的调质矿渣。采用旋转柱体法测定3种调质矿渣熔体的黏度,研究调质矿渣熔体的稳定性和酸度系数随原料组成的变化关系,以及调质剂化学组成对调质矿渣熔融温度及黏度的影响,并进一步研究页岩调质矿渣的高温黏度特性。结果表明：达到相同酸度系数的调质矿渣需添加的调质剂为石英砂最少,页岩次之,粉煤灰最多;调质矿渣达到同一黏度（如8Pa·s）时,页岩调质矿渣所需熔化温度最低,酸度系数为1.4时的熔化温度低至1410℃;以页岩为调质剂调质到矿渣酸度系数1.2以上时,矿渣的短渣属性消失,表现出典型的长渣特性。

Investigation on Composition Modulation of Blast Furnace Slag for Wool Producing

Quartz sand, fly ash and shale were respectively used to modulate the composition of the blast furnace slag （BFS） for mineral wool producing. The modulated BFS with different acidity coefficient （AC） was prepared by changing the content of the modulating agent. The viscosities of three kinds of molten BFS and the relationship between the viscosity and molten temperature were systematically investigated through rotating cylinder method. The relationship between the component of the raw materials and stability of the modulated slag, and the relationship between the component of the raw materials and AC of the modulated slag were analyzed systemically. And the influence of the component of modulating agents on the molten temperature and viscosity of the modulated BFS samples was also discussed. Furthermore the viscosity features at high temperature of shale modulated BFS was also studied. It is shown that the same AC of the modulated BFS required the amount of the modulating agents in the order of the quartz sand, the shale and fly ash from the least to the most. Among three modulating agents, the modulated BFS using shale as the modulating agent has the lowest liquid temperature at the same viscosity （such as at 8 Pa. s）. The liquid temperature is 1 410 ℃ for shale modulated sample with AC of 1.4. For the shale modulated liquid BFS with AC above 1.2, its short slag properties disappear and its long slag properties appeare apparently.