酸度系数对熔渣析晶和纤维性能的影响

以高炉渣为原料,利用离心成纤工艺直接制备矿渣纤维。在相同的成纤温度下,检测高炉渣不同酸度系数的晶体含量及其矿渣纤维的直径、渣球含量以及含水率等性能,构建了酸度系数与晶体含量以及矿渣纤维性能的关系,总结了矿渣纤维质量优劣的影响因素。结果表明:晶体的种类主要为钙镁黄长石和钙铝黄长石,随着酸度系数增加,晶体含量逐渐减少,纤维物化性能也发生相应变化。其中,酸度系数抑制渣球含量的生成,晶体对纤维直径和含水率整体上呈现促进作用。综合分析,当酸度系数位于1.3附近时,能够确保熔渣成纤质量较优。

Effect of Acidity Coefficient on Crystallization of Molten Slag and Fiber Properties

With blast furnace slag as raw material,the slag fibers were directly prepared by centrifugation process.The crystal content of the slag and properties of the formed slag fibers including the diameter,shot content and moisture with different acidity coefficients (Mk) for the slag,were determined at the same fibrosis temperature.The relationships between Mk and crystal content,the characteristics of slag fibers were established and the influence factors for the quality of slag fibers were also summarized in this paper.The results show that the crystals are mainly composed of calcium akermanite and gehlenite,and with increase in Mk the crystal content of slag gradually decreases,corresponding to changes in fiber properties.The shot content is inhibited by acidity coefficient,and a generally promotive effect on the diameter and moisture content of the slag fibers can be rendered by the crystals.A better fiber quality can be obtained with the value of Mk near 1.3.