Influence of Post-processing on Brightness of Titanium Dioxide
-
摘要: 为了解决钛白生产中钛白亮度低且波动较大问题, 结合某企业生产现场实际情况系统地研究钛白后处理原料和工艺对其亮度的影响。研究结果表明:钛白初品粒子平均直径处于250260 nm, 粒度分布窄、形貌接近球形和能够降低无机表面处理体系黏度的中粉分散剂均有助于提高钛白亮度, 有机处理剂类型对钛白亮度没有影响;中粉的粉碎和分散效果越好则亮度越高, 无机表面处理能提高钛白亮度约0.18, 闪干及汽粉中有机处理剂的加量对钛白亮度基本没有影响, 但有机处理剂在≥180℃温度长时间处理时, 容易发生碳化对钛白亮度产生不良影响。Abstract: In order to solve the problem of low brightness and brightness fluctuation for titanium dioxide(TiO2) produced by a certain plant,a systemic investigation related to influences of the raw materials and process of post-processing on brightness of TiO2 was carried out in basis of industrial conditions. The results show that a narrow particle size distribution(250 ~260 nm of average size for initial TiO2),sphereapproximate morphology and intermediate crushing dispersant able to decrease the viscosity of inorganic surface treatment system,are beneficial to brightness improvement of TiO2. Organic agents have no effect on TiO2 brightness,and a better smash and dispersion effect of intermediate crushing can help to improve the brightness.The inorganic surface treatment increases the brightness by about 0. 18. Furthermore,flash drying treatment and the addition of organic agent into steam powder have basically no impact on the brightness of TiO2. However,it suffers from carbonization of the organic treatment agent at temperatures higher than 180 ℃ for long hours,which has an adverse effect on the brightness of TiO2.
-
Key words:
- titanium dioxide /
- post-processing /
- brightness /
- particle size /
- morphology
点击查看大图
计量
- 文章访问数: 31
- HTML全文浏览量: 12
- PDF下载量: 3
- 被引次数: 0