Hydrated Calcium Silicate

This is a hydrated amorphous synthetic calcium silicate. Due to its amorphous nature it is safer to use than natural crystalline forms. It also has an entirely different range of properties compared to natural forms, i. E, higher surface area, oil absorption and lower particle size and bulk density.

Production process

Sodium silicate and calcium sulphate are reacted together under precisely controlled conditions to give a slurry of calcium silicate and sodium sulphate in solution. By stringent control of parameters such as temperature, ph, electrolyte concentration, agitation and reaction time, silicate of required structure and surface characteristics is produced.

The slurry is then filtered and washed with water to remove sodium sulphate. The filter cake is subsequently dried and then milled to the required particle size distribution. Finally the silicate is collected, deaerated, and packed at a controlled bulk density.