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为了改善矿渣棉纤维质量,采用铁尾矿对高炉渣进行调质,研究酸度系数对调质高炉渣黏度、熔化性温度和矿物组成的影响规律,并在此基础上采用离心试验证实了改变酸度系数能够优化纤维质量。结果表明:随着铁尾矿添加比例的升高,调质高炉渣的酸度系数Mk增加,调质高炉渣熔化性温度先降低后升高,熔化性温度对应的黏度值逐渐增加,调质高炉渣中不再有矿物析出,熔渣凝固后全部为非晶相。说明高炉渣开始由短渣特性转变为长渣特性,且在符合矿渣棉成纤黏度条件下,熔渣黏度变化趋于平缓,因此对高炉渣进行调质可以拓宽成纤温度区间范围,易于高炉渣纤维化控制;且酸度系数Mk提高,进一步可以改善纤维直径,提高纤维的使用性能。
In order to improve the quality of slag fiber, the iron tailing was used to adjust the blast furnace slag. The influence of acidity coefficient on the viscosity, melting temperature and mineral composition of quenched and tempered blast furnace slag was studied. Based on this, the centrifugal test was carried out to confirm the change of acidity coefficient Ability to optimize fiber quality. The results show that the acidity coefficient Mk of the quenched and tempered blast furnace slag increases with the increase of iron tailings proportion, the melting temperature of quenched and tempered blast furnace slag first decreases and then increases, the viscosity value corresponding to the melting temperature gradually increases, There is no more mineral in the slag, and the slag is all amorphous after solidifying. Indicating that blast furnace slag started to change from short slag characteristics to long slag characteristics, and the change of slag viscosity tends to be gentle under the conditions of slag fiber forming fiber viscosity. Therefore, the blast furnace slag can be quenched to broaden the range of fiberizing temperature range, easy to high Slag fiberization control; and the acidity coefficient Mk increased further to improve the fiber diameter and improve fiber performance.