煅烧过程中锌系与铝系钛白粒子演变规律的对比研究  

Comparative study on the evolution law of zinc salt and aluminum salt treated titanium dioxide particles during calcination

作　　者：刘婵 路瑞芳[1,2] 吴健春 石瑞成[1] Liu Chan;Lu Ruifang;Wu Jianchun;Shi Ruicheng(State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Pangang Group Research Institute Co.,Ltd.,Panzhihua 617000,Sichuan,China;School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400030,China)

机构地区：[1]钒钛资源综合利用国家重点实验室,攀钢集团研究院有限公司,四川攀枝花617000 [2]重庆大学化学化工学院,重庆400030

出　　处：《钢铁钒钛》2023年第2期34-39,102,共7页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金青年科学基金项目(编号:22108019)。

摘　　要：分别选取攀枝花某钛白粉厂锌系盐处理和铝系盐处理后的窑前压榨料作为试验原料,开展从室温到990℃匀速升温的煅烧过程中二氧化钛粒子性质变化规律研究。首先,通过水分分析仪分析了煅烧过程中不同温度下的样品水分变化,表明800℃以上基本不存在结构脱水。进一步通过纳米激光粒度仪和SEM对粒子粒径和形貌进行考察,表明脱水过程中先形成边界清晰的团聚体,脱水完全后,团聚体逐渐解体,一次粒子逐渐长大,边界逐渐清晰。当金红石含量达到98%以上时,TiO_(2)粒子SEM平均粒径随着温度升高而增大的同时,粒径标准差也随之增大。脱硫对TiO_(2)粒子表面zeta电位影响较脱水更加明显,且金红石含量的变化对粒子表面zeta电位变化影响显著。In this paper,the titanium dioxide filter cakes after zinc or aluminum salt treatment from a titanium dioxide factory in Panzhihua were selected as test materials to study the properties of titanium dioxide particles during the calcination process from room temperature to 990℃ under the condition of constant heating rate.Firstly,the moisture changes of the samples at different temperatures during calcination were analyzed by moisture analyzer.The results showed that there was basically no structural dehydration above 800℃.The morphology and particle size of the particles were further investigated by ZS90 and SEM,which showed that the aggregates with clear boundaries were formed first in the process of dehydration.After complete dehydration,the aggregates gradually disintegrated,and the primary particles gradually grew and the boundaries became clear.When the rutile content reaches more than 98%,the SEM average particle size of TiO_(2) particles increases with the increase of temperature,and the standard deviation of particle size also increases.The effect of desulfurization on the zeta potential on the surface of TiO_(2) particles is more obvious than that of dehydration,and the change of rutile content has a significant effect on the change of the zeta potential on the surface of the particles.

关 键 词：金红石TiO_(2) 煅烧 粒度分布 ZETA电位 

分 类 号：TB34[一般工业技术—材料科学与工程] TF823[冶金工程—有色金属冶金]