Research on wet gringding dispersion properties of different rutile TiO2 initial products
In this work,four kinds of industrial TiO2 initial products were used as raw materials to study the wet gringding dispersion of Zn series TiO2 and Al series TiO2 at different concentrations.Then,the difference of dispersion properties was analyzed by the characterization of slurry viscosity,dispersion stability,particle size and supernatant conductivity.The results show that the dispersibility of Zn series products is weaker than that of Al series products under the same sodium silicate dispersion process,and the slurry viscosity increases with the increase of beating concentration.The limit beating concentration of each Zn series products is different.When Na2SiO3 addition is 0.30％of the mass ratio of SiO2/TiO2,the highest dispersion concentration of Zn series B can reach 500 g/L,but it still can not reach the level of Al series products.At low concentrations below 300 g/L,there are more small particle size particles in each product,so the dispersion is more stable.With the increase of concentration,the dispersion sta-bility of slurry decreases.The lower the viscosity of the slurry,the worse the dispersion stability.The amount of surface charge of all kinds of raw materials varies,and TiO2 with more surface charge has lower viscosity.
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