含钛高炉渣结晶规律的研究

STUDY ON CRYSTALLIZATION BEHAVIOR OF BLAST FURNACE SLAG CONTAINING TiO_2

用差热分析和淬冷法配合岩相分析,研究了SiO_2和TiO_2对CaO-SiO_2-TiO_2-Al_2O_3-MgO五元合成渣系结晶规律的影响,绘制出该渣系在改变SiO_2和TiO_2含量时的两个矿物结晶区域图,并确定了钙钛矿和黑钛石的结晶区域。测定了在中性气氛下,不同条件时,渣中钙钛矿和黑钛石的结晶量。为采用结晶分离法降低含钛高炉渣中的TiO_2含量及其利用提供了必要的理论基础。

The effect of SiO2 and TiO2 on crystallization behavior of CaO-SiO2-TiO2-MgO-Al2O3 slags was studied by differential thermal analysis and optical microscope. The mineral crystalline region diagrams of the slag system with changing SiO2 and TiO2 contents were set up. The crystalline region of perovskite and anosovite was determined. The paper provided a theoretical basis for reducing TiO2 content in blast furnace slag containing TiO2 by crystallization-extraction method and for the comprehensive utilization of the slags.