Process for dust reduction treatment of expanded perlite

摘要

The dust fraction of expanded perlite is bonded to the larger sized grains by spraying finely atomized paraffin at a temperature of less than 130 C. upon the perlite which has been cooled to a temperature of less than 130 C. In a second embodiment of the invention, the perlite is treated with a water repellent process prior to the paraffin treatment.