A process of reclaiming gypsum from plasterboard.

摘要

A process of reclaiming gypsum from plasterboard in which the plasterboard is broken up and then screened to obtain a fine fraction largely comprised of gypsum. The plasterboard is differentially ground in a hammermill having an opening discharge port to form a mixture of small sized particles of gypsum and substantially larger pieces of paper which is subsequently screened to obtain a fraction consisting predominantly of gypsum.