空气和钛精矿对含钛混合熔渣钙钛矿富集行为的影响  

Effect of Air and Concentrate of Titanium on Enrichment Behavior of Perovskite in Titanium-Containing Mixed Slag

作　　者：李鑫 王鑫博 许帅鹏 张少博 谢靖 张力 LI Xin;WANG Xinbo;XU Shuaipeng;ZHANG Shaobo;XIE Jing;ZHANG Li(School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学冶金学院,沈阳110819

出　　处：《有色金属工程》2024年第3期51-62,共12页Nonferrous Metals Engineering

基　　金：国家科技支撑计划项目(2015BAB18B00)。

摘　　要：采用XRD、SEM、EDS、Image-J等分析手段,探讨空气和钛精矿对含钛熔渣中钛资源富集行为的影响。通过对含钛混合熔渣改性,熔渣中钙钛矿晶体形状发生变化,降低钙钛矿晶体运动阻力,方便上部钙钛矿晶体向下部迁移和富集,得到高品位人造钙钛矿精矿。结果表明:合适的氧化时间有利于熔渣中的低价钛向高价钛转化,适量的添加钛精矿有利于促进钙钛矿晶体的成核,以球形晶体析出。因此,在较佳氧化时间2 min和较佳钛精矿添加量12%共同作用下,Ti组分以球形钙钛矿晶体富集于改性渣底部,钙钛矿体积分数由25.12%增加到61.50%。XRD,SEM,EDS and Image-J analysis were performed to explore the combined influence of air and concentrate of titanium on the enrichment behavior of titanium resources in Ti-bearing blast-furnace slag.By modifying the titanium-containing mixed slag,the shape of perovskite crystals in the slag is changed,the movement resistance of perovskite crystals is reduced,the upper perovskite crystals are convenient to migrate and enrich to the lower part,and high grade artificial perovskite concentrate is obtained.The experimental results show that suitable oxidation time is conducive to the conversion of low-priced titanium to high-priced titanium in the slag and proper addition of titanium concentrate is beneficial to promote the nucleation of perovskite crystals and precipitate spherical crystals.Therefore,Ti components are enriched in the bottom of the modified slag with spherical perovskite crystals under the optimum oxidation time(2 min)and the optimal added amount of concentrate of titanium(12%),and the volume fraction of perovskite increases from 25.12%to 61.50%.

关 键 词：含钛高炉渣 钢渣 氧化 钛精矿 钙钛矿 

分 类 号：TF823[冶金工程—有色金属冶金]