Using chromite sand to improve the wear resistance of lost foam grinding balls
The mechanical properties and wear resistance of the grinding balls produced by the lost foam negative pressure casting process using quartz sand as the molding sand are relatively poor. In order to improve the wear resistance of the grinding balls, chromite sand can be used instead of dry quartz sand. Because of chromite sand The heat storage coefficient and thermal conductivity coefficient of the chromite sand are much higher than that of quartz sand, and the surface hardness of the chromite sand casting mold is higher, so the impact toughness value of the produced grinding ball is increased from 5.17J/cm2 to 5.70J/cm2; and the relative The wear resistance is 1.24 times that of quartz sand grinding balls.
