工业钛液制备水解晶种粒径影响因素研究  

Study on the effect of the particle size of hydrolysis seeds prepared by industrial titanyl sulfate solution

作　　者：路瑞芳[1,2] 董立春 杨芳[1] 孙蔷 吴健春 刘婵[1] Lu Ruifang;Dong Lichun;Yang Fang;Sun Qiang;Wu Jianchun;Liu Chan(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;School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,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 [3]东北大学冶金学院,辽宁沈阳110819

出　　处：《钢铁钒钛》2024年第1期34-39,共6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：以工业钛液为原料,采用目前硫酸法钛白企业常用的氢氧化钠溶液中和法制备水解晶种工艺,改变关键原料指标和工艺参数,考察晶种粒径和晶种稳定性的变化规律。然后将不同粒径的晶种用于水解,研究了晶种粒径对偏钛酸粒径及固定盐处理煅烧后所得金红石钛白初品粒径和消色力的影响。结果表明,随着钛液TiO_(2)浓度、F值、铁钛比以及碱液浓度的升高,相同稳定性下晶种粒径变大;随着晶种制备碱钛比、钛液预热温度、碱液预热温度的增加,相同稳定性下晶种粒径减小;随着熟化时间的延长,晶种稳定性降低,晶种粒径变大。随着晶种粒径的变大,水解所得偏钛酸D_(50)和径距逐渐变小,偏钛酸晶粒尺寸略增;对应金红石钛白初品的SEM平均粒径和标准差逐渐减小,同时其Tcs、Scx均增加。With industrial titanyl sulfate solution as raw material,the hydrolysis seeds were prepared by sodium hydroxide solution neutralization method,which is commonly used in titanium pigments production by sulfuric process.And under different raw material indexes and process parameters,the changes of the seeds particle size stability were also investigated.Then the seeds with different particle sizes were used for hydrolysis,and the correlation between particle size of seeds and that of metatitanic acid was studied.Furthermore,under the condition of fixed salt treatment,the influence on the particle size and reducing power of the subsequent rutile titanium white was studied.The results show that with the increase of TiO_(2) concentration,F value,Fe/TiO_(2) of titanyl sulfate solution and NaOH solution concentration,the particle size of seeds increases under the same stability.With the increase of the ratio of NaOH/TiO_(2),the preheating temperature of titanyl sulfate solution and NaOH solution,the particle size of seeds decreases under the same stability.With the increase of aging time,the stability of seeds decreases and the particle size of seeds increases.With the increase of seeds particle size,D_(50) and span of metatitanic acid obtained by hydrolysis gradually decreases,and the grain size of metatitanic acid slightly increases.The SEM average particle size and standard deviation of the corresponding rutile titanium white sample gradually decreases,while the Tcs and Scx of the sample increases.

关 键 词：钛白 水解 晶种 粒径 偏钛酸 

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