HCl和H_(2)SO_(4)对金红石二氧化钛包硅效果的影响研究  

Effect of HCl and H_(2)SO_(4) on SiO_(2) coating of rutile titanium dioxide

作　　者：刘婵 路瑞芳[1,2] 杨芳 程晓哲 Liu Chan;Lu Ruifang;Yang Fang;Cheng Xiaozhe(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》2021年第1期60-64,共5页Iron Steel Vanadium Titanium

摘　　要：选择硅酸钠作为氯化法金红石钛白的包硅原料,首先研究了包膜过程中调节pH的盐酸加量与包膜后钛白粉颜料性能的关系,结果表明随着盐酸加量的增加钛白粉亮度、白度L值和蓝光白度等颜料性能指标降低,但Scx和b值等蓝相指标则逐渐改善。其次对比分析了包硅过程中硫酸和盐酸两种不同酸体系中钛白粉二氧化硅膜层均匀致密性、颜料性能和应用性能的差距,明确了硫酸体系的二氧化硅膜层均匀致密性更好、光泽度更高,而盐酸体系的蓝相更优。Using sodium silicate as the coating agent for rutile titanium dioxide from chlorination process,the relationship between the pigmentary properties of the coated titanium dioxide and the addition amount of hydrochloric acid used for pH adjustment during the coating process, was investigated firstly. The results show that with increase of the hydrochloric acid addition, the brightness, whiteness L value and blue whiteness of the titanium dioxide decrease, while the blue phase indexes(e.g. Scx and b value) of the titanium dioxide are improved gradually. Subsequently, the homogeneity and compactness of the silicon dioxide coating layer, pigmentary and application properties of the titanium dioxide from sulfuric acid and hydrochloric acid systems were compared and analyzed. A better homogeneity and compactness coupled with a higher glossiness of the silicon dioxide coating layer can be obtained for titanium dioxide from sulfuric acid system, while the titanium dioxide from hydrochloric acid system has a better blue phase.

关 键 词：金红石钛白 无机包膜 HCL H_(2)SO_(4) 颜料性能 

分 类 号：TF823[冶金工程—有色金属冶金]