摘要
含钛高炉渣中含有20%30%的TiO2,是一种附加值较高的二次资源,但在综合利用过程中存在氧化物还原难度大,硅钛难分离,二次污染严重等问题。基于热力学理论基础,采用真空碳热还原联合酸浸工艺处理含钛高炉渣制备TiC。结果表明：真空有助于钛氧化物彻底还原,可实现渣中硅钛彻底分离,减少酸耗量,降低二次污染。真空碳热还原联合酸浸工艺处理含钛高炉渣（TiO2含量23%左右）制备TiC的最佳条件为：炉渣粒度200目,还原温度1 673K,渣碳质量比100∶38。
Titanium bearing blast furnace slag with 20%-30% titanium dioxide is a valuable second resource.The main problems to utilize the resource are the reduction of the titanium oxides,the separation of titanium and silicon and the second pollution.The main aim of the research is to prepare TiC by the united process of carbothermal reduction in vacuum and acid leaching based on the thermodynamics calculation.The results show that decreasing pressure of the system is helpful for the reduction of the titanium oxides.Titanium and silicon in slag can be separated completely.The second pollution decreases due to evaporation of Mg and SiO produced in vacuum condition.The optimum conditions for the united process to prepare TiC are slag size of 200 mesh,temperature of 1 673 K,and the mass ratio of slag to reductant of 100∶38.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第6期99-106,共8页
Journal of Chongqing University
基金
国家自然科学基金资助(51404044)
高等学校博士学科点专项科研基金资助项目(20130191110015)~~
关键词
真空
碳热还原
酸浸
含钛高炉渣
TIC
vacuum
carbothermal reduction
acid leaching
titanium bearing blast furnace slag
TiC
