微波强化改性钛精矿硫酸浸出研究  

Study on sulfuric acid leaching of titanium concentrate modified by microwave enhancement

作　　者：安云飞 刘秉国[1,2,3] 胡途 宇文超[1,2,3] 陈旺 龚斯宇 嵇广雄 侯恪人 杨振兴 金钰皓 丁杰 AN Yunfei;LIU Bingguo;HU Tu;YU Wenchao;CHEN Wang;GONG Siyu;JI Guangxiong;HOU Keren;YANG Zhenxing;JIN Yuhao;DING Jie(Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory of Unconventional Metallurgy,Ministry of Education,Kunming University of Science and Technology,Kunming,650093,China;National Key Laboratory of Clean Utilization of Complex Nonferrous Metals,Kunming University of Science and Technology Laboratory,Kunming,650093,China)

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

出　　处：《中南大学学报(自然科学版)》2025年第2期458-467,共10页Journal of Central South University:Science and Technology

基　　金：云南省基础研究专项重点项目(202101AS070014);云南省绿色铝硅钛材料重大专项(202202AG050007)。

摘　　要：针对硫酸法提取钛工艺存在废酸量大、能耗高、环境污染严重等问题,在氢氧化钠改性基础上,对钛精矿进行常规浸出和微波浸出,研究最佳浸出条件,并分析浸出渣的表面形貌结构与物相组成。研究结果表明:经焙烧、改性、水洗后,FeTiO_(3)转变为活性更强的NaFeTiO_(4)与Na_(2)Fe_(2)Ti_(3)O_(10)。在微波功率为600W、硫酸质量分数为50%、液固比为6꞉1、浸出温度为80℃、浸出时间为120min条件下,微波加热和常规加热浸出率分别达到95.57%和89.11%。微波加热减少了硅胶对钛的吸附,浸出渣比表面积增大,可在低酸条件下实现钛的高效浸出,为钛精矿的高效利用提供新思路。Aiming at the problems of large amount of waste acid,high energy consumption and serious environmental pollution in the process of titanium extraction by sulfuric acid method,microwave leaching and conventional leaching of titanium concentrate were carried out based on sodium hydroxide modification.The optimal leaching conditions were studied and the surface morphology and phase composition of leaching residue were analyzed.The results show that FeTiO_(3) is transformed into NaFeTiO_(4) and Na_(2)Fe2Ti_(3)O_(10) with stronger activity after roasting and washing.Under the conditions of microwave power 600 W,sulfuric acid mass fraction 50%,liquid-solid ratio 6꞉1,leaching temperature 80℃and leaching time 120 min,the leaching rates of microwave heating and conventional heating are 95.57%and 89.11%,respectively.The microwave heating reduces the adsorption of titanium by silica gel,and the specific surface area of the leaching residue increases under the action of microwave.The microwave leaching process can realize the efficient leaching of titanium under low acid conditions,which provides a new idea for the efficient application of titanium concentrate.

关 键 词：微波 改性钛精矿 浸出 焙烧 

分 类 号：TF11[冶金工程—冶金物理化学]