氯化法钛白粉浆料的黏度影响研究

Study on viscosity impacting factor of titanium dioxide slurry in chloride process

针对氯化钠除疤工艺生产的氯化法钛白粉浆料存在黏度增大的现象,采用洗涤压滤的除盐工艺降低浆料中的氯化钠含量,通过调节浆料pH、六偏磷酸钠用量、浆料黏度,确定氯化钠用量为2‰(wt,质量分数)、pH=6、六偏磷酸钠用量为3‰(wt,质量分数)、钛白粉浆料浓度为450g/L,可以获得黏度为58mPa·s的钛白粉浆料,达到钛白粉浆料后处理表面包膜的黏度指标要求。

The chlorinated titanium dioxide slurry produced by the sodium chloride removing process has an increased viscosity,and the desalination process by washing and pressure filtration reduces the sodium chloride content in the slurry by adjusting the pH of the slurry and the hexametaphosphate.The amount of sodium and the viscosity of the slurry was determined to be 2‰(wt,mass fraction),pH=6.Sodium hexametaphosphate was 3 ‰(wt,mass fraction),and the concentration of titanium dioxide slurry was 450g/L.A titanium dioxide slurry with the viscosity of 58mPa·s can be obtained,which reached the viscosity index requirement of the surface coating of the titanium white powder slurry.