EFFICIENT PRODUCTION OF LANDPLASTER BY COLLECTING AND CLASSIFYING GYPSUM FINES

摘要

A landplaster production method includes the steps of providing a supplyof particulate gypsum material, drying the gypsum material by passing a stream of heatedair thereby as the material is rotated, classifying and separating the dried particles intofines and coarse particles, collecting the suspended fines in a collector, passing the coarseparticles to a grinder such as a roller mill for reducing the particles, and mixing thereduced particles with the collected fines for processing into landplaster. The eliminationof fines from the feed to the grinder results in significantly greater production byincreasing the efficiency of the grinder. Further, the dryer is modified to agitate the driedgypsum material so that it may be more easily introduced into the classifier/separatorsituated adjacent the drier discharge outlet.