Abstract

In the process of extracting alumina from high-alumina fly ash of power plant, the amorphous silica in fly ash is extracted by alkali solution and precipitated with lime milk to synthesis hydrated calcium silicate powder, which has the characteristics of high oil absorption, high value, low abrasion value, large specific surface area and low bulk density, show that the addition of hydrated calcium silicate filler to the printing ink helps to improve the viscosity, fineness, color density, color and other indicators. The filler filling ratio is higher than traditional ink fillers such as calcium carbonate. It is expected that the hydrated calcium silicate filler has wide potential application value in ink reduction, VOCs control and functionality.