Mechano-Activated Surface Modification of Calcium Carbonate Particles in Aqueous Medium
Mechano-activated surface modification is thought to be more valuable and effective because the mechano-chemical effect resulted from ultra-fine grinding can increase mineral surface activity and enhance reactivity between phases. Surface modification of calcium carbonate particles incorporated with the simultaneous wet ultra-fine grinding in the laboratory stirred mill has been studied using sodium sterate (SS) as a modification agent in this paper. It has been proved that the effect of modification can be enhanced by the incorporation of the simultaneous wet ultra-fine grinding because of mechano-chemical effect. The modification results are affected by the grinding fineness, pulp density, pH value, temperature of pulp and the crushing mechanic force intensity. Among these factors the crusing mechanic force is very important, it should be kept in a suitable range.