碱焙烧改性钛精矿物料的超声强化浸出工艺  

Leaching process of ultrasound enhanced modified titanium concentrate

作　　者：丁杰 刘秉国[1,2,3] 安云飞 陈旺 DING Jie;LIU Bingguo;AN Yunfei;CHEN Wang(School of Metallurgy and Energy Engineering,Kunming University of Technology,Kunming 650093,China;Key Laboratory of Unconventional Metallurgy,Ministry of Education,Kunming University of Technology,Kunming 650093,China;State Key Laboratory for Clean Utilization of Complex Nonferrous Metal Resources,Kunming University of Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]昆明理工大学非常规冶金教育部重点实验室,昆明650093 [3]昆明理工大学复杂有色金属资源清洁利用国家重点实验室,昆明650093

出　　处：《中国有色金属学报》2025年第2期671-680,共10页The Chinese Journal of Nonferrous Metals

基　　金：云南省基础研究专项重点项目(202101AS070014);云南省科技重大项目(202202AG050007);昆明理工大学分析测试基金资助项目(2022M20212202159)。

摘　　要：为了提高钛精矿中钛的浸出率,研究了碱焙烧改性钛精矿物料在超声条件下钛的浸出行为及浸出动力学,探讨了碱焙烧对钛精矿性质的改变以及超声功率、硫酸浓度、浸出时间、液固质量比、浸出温度等参数对钛浸出行为的影响。结果表明,碱焙烧可以将钛精矿中的钛转化为更易于浸出的NaFeTiO_(4),在超声功率600 W、硫酸浓度80%、浸出时间120 min、液固比6∶1(g∶g)、浸出温度85℃条件下,钛浸出率达到98.6%。动力学分析发现,钛的浸出过程符合未反应收缩核模型,受内扩散控制,浸出反应的表观活化能Ea为8.819 kJ/mol。超声条件下钛的浸出行为及浸出动力学的研究为钛精矿强化浸出提供了新途径。In order to improve the leaching rate of titanium in titanium concentrate,the leaching behavior and kinetics of titanium in alkali roasted modified titanium concentrate materials under ultrasonic conditions were studied.The changes in the properties of titanium concentrate caused by alkali roasting and the effects of parameters,such as ultrasonic power,sulfuric acid concentration,leaching time,liquid-solid ratio and leaching temperature on titanium leaching behavior were explored.The results show that alkali roasting can convert titanium in titanium concentrate into more easily leached NaFeTiO_(4).Under the conditions of ultrasonic power 600 W,sulfuric acid concentration 80%,leaching time 120 min,liquid-solid ratio 6∶1 and leaching temperature 85℃,the titanium leaching rate can reach 98.6%.The dynamics analysis results found that the leaching process of titanium conforms to the unreacted shrinking nucleus model,controlled by internal diffusion.The apparent activation energy Ea of the leaching reaction is 8.819 kJ/mol.By studying the leaching behavior and kinetics of titanium under ultrasound conditions,a new approach has been provided for enhancing the leaching of titanium concentrate.

关 键 词：钛精矿 超声强化 浸出 动力学 

分 类 号：TF11[冶金工程—冶金物理化学]