高钛高炉渣酸浸液沸腾水解制备偏钛酸的过程动力学研究  

Study on the process kinetics for producing metatitanic acid by boiling hydrolysis of acid leaching liquor from high-titanium blast furnace slag

作　　者：唐玉梅 何思祺 黄晨 王岩[1] Tang Yumei;He Siqi;Huang Chen;Wang Yan(School of Environment and Resources,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;School of Resource and Environmental Engineering,Mianyang Teachers'College,Mianyang Sichuan 621010,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]绵阳师范学院环境资源工程学院,四川绵阳621010

出　　处：《化工矿物与加工》2022年第1期1-5,共5页Industrial Minerals & Processing

基　　金：绵阳师范学院科研项目(QD2021A06)。

摘　　要：攀枝花钢铁厂高炉冶炼产生的水淬高钛高炉渣经浓硫酸焙烧、稀硫酸浸取后获得富含Ti^(4+)的浸取液,通过沸腾水解法可将浸取液中的可溶性Ti^(4+)转化成H_(2)TiO_(3)沉淀。为探究酸浸液沸腾水解制备H_(2)TiO_(3)的过程动力学行为,研究了底液pH和水解温度在不同反应时间下对Ti^(4+)水解率的影响,并采用Avrami模型和生长动力学模型模拟水解过程,结果显示Ti^(4+)的水解过程更符合Avrami动力学模型,证明H_(2)TiO_(3)的形成速率主要由颗粒形核过程控制。通过Arrhenius方程拟合计算得到的水解反应的表观活化能为197930 J/mol,并获得了水解过程的半经验式动力学方程。The water-quenched high-titanium blast furnace slag from smelting unit of the blast furnace in Panzhihua Iron and Steel Plant is subjected to calcination with concentrated sulfuric acid and followed by leaching with weak sulfuric acid to obtain a Ti^(4+)-bearing leaching liquor.Using boiling hydrolysis process,the soluble Ti^(4+)contained in the leaching liquor can be converted into H_(2)TiO_(3) as a precipitation.In order to explore the dynamic behavior of the boiling hydrolysis of acid leaching liquor to prepare H_(2)TiO_(3),the effects of pH and hydrolysis temperature of base solution on the hydrolysis rate of Ti^(4+)with different reaction times were studied,where the Avrami model and growth kinetic model were employed to simulate the hydrolysis process.The results show that the hydrolysis process of Ti^(4+)conforms to the Avrami kinetic model,which demonstrates that the production rate of H_(2)TiO_(3) is mainly subjected to the particle nucleation process.The apparent activation energy of the hydrolysis reaction resulted at 197,930 J/mol upon fitting calculation with Arrhenius equation,and the semi-empirical kinetic equation was obtained.

关 键 词：高钛高炉渣 酸浸液 沸腾水解 偏钛酸 动力学 

分 类 号：X757[环境科学与工程—环境工程]