TiO2和碱度对CaO-MgO-Al2O3-SiO2-Cr2O3-Fe2O3-TiO2渣系黏度和结构及氧化铬溶解度的影响OA北大核心CSTPCD

To make more use of stainless steel slag to prepare glass-ceramics to solidify Cr in slag,this paper systematically studied the effects of different TiO2 and alkalinity on the solubility of Cr2O3 in CaO-MgO-Al2O3-SiO2-Cr2O3-Fe2O3-TiO2 slag system and the adhesion and melting characteristics of slag system.The changes in viscosity,phase composition and structure of slag system with different TiO2 content(4％-10％)and alkalinity(C/S=0.5,0.75,1)were investigated using melt physical property comprehensive tester,XRD and Raman spectrometer.The results show that with the increase of TiO2 content and alkalinity,the solubility of Cr2O3 in the slag sample increases,the viscous flow activation energy decreases,and the viscosity of the slag system also decreases accordingly.Compared with TiO2,increasing alkalinity can effectively reduce viscosity.The increase of TiO2 content and alkalinity increases the number of Q0 and Q1 structural units in the slag,while the decrease of Q3 simplifies the silicate network structural units and reduces the viscosity of the slag system.At the same time,it also hinders the crystallization of chromium-containing spinel and increases the solubility of Cr2O3 in the slag sample.