转炉钢渣自粉化的可行性研究

Feasibility Study of Self-pulverization of Converter Steel Slag

比照国内钢铁企业转炉钢渣的化学成分,选择CaO(50%)-Mg O(10%)-SiO_2(10%)-Fe_2O_3(30%)(质量分数)四元简单合成渣系作为实验转炉渣系,采用X射线衍射仪、扫描电镜以及能谱仪分析样品物相、形貌和物相成分,通过煅烧熔融实验研究碱度和P_2O_5含量对转炉钢渣粉化的影响。结果表明:控制二元碱度R≈2.5时,钢渣粒径150μm下钢渣自粉化效果最好,粉化率能达到94.33%;钢渣中P_2O_5质量分数小于0.125%时,才能实现转炉钢渣自粉化。

Based on the chemical compositions of steel slags from domestic iron and steel enterprises, CaO(50%)-MgO(10%)-SiO2(10%)-Fe2O3(30%) (mass fraction)slag was chosen as basic experimental synthetic slag system.After experiment of calcination and melt, the plase, topography and microstructure were analyzed with X- ray diffraction, scanning electron microscope and spectrometen, the influence of basicity and P2O5 content on selfpulverization was studied. The results show that controlling the basicity with R≈2.5, when slag particle size is less than 150 μm, the slag has the best effect of self-pulverization, and slag pulverization rate can reach 94.33%; when the mass fraction of P2O5 in slag is less than 0.125%, the slag can achieve self-pulverization.