钛液水解过程中偏钛酸的结构演变对硫含量的影响研究  

Effect of structural evolution of metatitanic acid on sulfur content during hydrolysis of industrial TiOSO_(4) solution

作　　者：田从学 王青鸿 练宗鑫 刘稷 李玫 Tian Congxue;Wang Qinghong;Lian Zongxin;Liu Ji;Li Mei(School of Vanadium and Titanium,Panzhihua University,Panzhihua 617000,Sichuan,China;Vanadium and Titanium Resource Comprehensive Utilization Key Laboratory of Sichuan Province,Panzhihua 617000,Sichuan,China)

机构地区：[1]攀枝花学院钒钛学院,四川攀枝花617000 [2]钒钛资源综合利用四川省重点实验室,四川攀枝花617000

出　　处：《钢铁钒钛》2023年第1期4-9,共6页Iron Steel Vanadium Titanium

基　　金：四川省自然科学基金项目(2022NSFSC0307);四川省科技成果转化示范项目(23ZHSF0237);四川省钒钛材料工程技术研究中心开放基金项目(2021-FTGC-Z-10);省级、市级人才培养项目。

摘　　要：采用外加晶种热水解工艺从工业钛液制得偏钛酸,研究了偏钛酸结构演变过程对硫含量的影响。水解过程分为快速水解段和慢速成熟阶段,水解率变化满足Boltzmann模型。随着水解进行,偏钛酸结构变化明显,颗粒聚集与调整使其结构更紧凑,胶体性质减弱,TiO_(2)含量增大。偏钛酸颗粒的微孔与介孔结构由其一次聚集体聚集、堆积形成,孔道由硫酸盐与水等填充。硫酸根通过溶解于吸附水、吸附、键合等形式存在于偏钛酸中,硫含量随TiO_(2)含量增大而逐渐减小,二者呈线性关系。The effect of structural evolution of metatitanic acid on sulfur content was investigated by hydrolyzing the industrial TiOSO_(4)solution via thermal hydrolysis method with extra-adding seed. The hydrolysis process was divided into fast hydrolysis stage and slow maturation stage, the change of hydrolysis degree conformed to Boltzmann model. The structure of metatitanic acid changed obviously as the hydrolysis proceeded, its structure became more compact due to the aggregation and adjustment of the precipitated particles, with weaker colloidal property and higher TiO_(2)content. The microporous and mesoporous structures of metatitanic acid were formed by the aggregation and accumulation of its primary aggregates, and the pores were filled with sulfate and water. Sulfate radical existed in metatitanic acid was mainly in the form of dissolution in adsorbed water, adsorption, bonding, etc. The sulfur content decreased gradually with the increase of TiO_(2)content, showing a linear relationship.

关 键 词：偏钛酸 硫含量 工业钛液 水解 结构演变 

分 类 号：TQ621.1[化学工程—精细化工] TF823[冶金工程—有色金属冶金]