钢铁钒钛2025，Vol.46Issue(4)：8-17,10.DOI:10.7513/j.issn.1004-7638.2025.04.002
朝阳地区钛渣钠化焙烧过程工艺参数研究
Study on the parameters of sodium roasting process of titanium slag from Chaoyang area
摘要
Abstract
The paper used a sodium roasting process to improve the quality of titanium slag from Chaoyang area.The controlling steps of the process were analyzed and the activation energy of the reac-tions between molten sodium carbonate and titanium slag were calculated.The effects of process para-meters such as roasting temperature,time,and alkali to slag ratio were also discussed.Kinetic analysis shows that the controlling step of the process is the internal diffusion of reactants through the solid product layer,with a reaction activation energy of 50.13 kJ/mol.The change in Gibbs free energy with temperature indicates that the reactions can occur mostly at temperatures above 900℃,and the change in conversion rate over time indicates that the reactions are essentially completed after 1 hour.Accord-ing to the analysis of the effects of various parameters on the roasting process,the optimal process para-meters for both impurity removal and cost-effectiveness are determined to be roasting at 900℃,a sodi-um carbonate to titanium slag mass ratio of 1.0,and a roasting time of 1.5 hours.关键词
钛渣/固废利用/钠化焙烧/反应动力学/人造金红石Key words
titanium slag/solid waste utilization/sodium roasting/reaction kinetics/synthetic rutile分类
矿业与冶金引用本文复制引用
YAN Jiaqi,ZHAO Liang,DONG Hui,FENG Junsheng..朝阳地区钛渣钠化焙烧过程工艺参数研究[J].钢铁钒钛,2025,46(4):8-17,10.基金项目
国家重点研发计划(2020YFC1909303). （2020YFC1909303）
