INFLUENCE OF PH ON THE CRYSTAL SIZE DISTRIBUTION OF MG(OH)2 PREPARED BY THE HYDRATION OF MGO

The effect of pH and temperature of aqueous solution on hydration of MgO in a batch laboratory reactor was investigated. The experiments were carried out at the temperatures of 120 and 140-degrees-C, pH of cool solution was changed-from 10 to 13. It was found that even a small amount of added base substance influences remarkably the size of Mg(OH)2 crystals. Increasing of pH of aqueous environment causes the decrease of the size of crystals. The increase of the temperature increase dimensions (L50) of crystals. This effect is more important at higher alkalinity of the solution.