APPARATUS AND METHOD FOR RECYCLING GYPSUM

摘要

A method and apparatus for recycling gypsum board which includes grinding the raw material into chunks, crushing the material further in a rolling mill which will reduce material sizes as well as partially knock gypsum off its backing paper. Material is then screened such that only gypsum material is then deposited into a hopper prior to a mixer assembly which mixes the various sizes of recycled gypsum into a consistent mixture prior to passing such material into a roll press subsystem for densifying such material to produce material of known and uniform composition suitable for cement manufacturing. Reclaimed gypsum in this specific physical form factor may then be used in significant portions as replacement for virgin gypsum in cement manufacture. The method and apparatus are applicable to the recycling of both new and renovation gypsum-based building material.

主权项

1. A method for recycling gypsum, the method comprising:
pre-selecting recycled gypsum material to remove defined non-usable material, said recycled gypsum material comprising gypsum and paper; grinding the recycled gypsum material to a first size range of gypsum lumps and paper in a grinding assembly; crushing the gypsum lumps and paper to a second smaller size range of gypsum powder to remove at least a portion of the gypsum from the paper in a roller mill assembly; screening the gypsum powder to remove at least a portion of the paper and leave screened gypsum powder in a screening assembly; collecting the screened gypsum powder in a hopper assembly; admitting the screened gypsum powder in a measured flow into a mixing assembly; mixing the screened gypsum powder with a binder additive in the mixing assembly to provide a gypsum mixture; admitting the gypsum mixture into a roll press assembly; and densifying the gypsum mixture into a densified gypsum form factor in the roll press assembly.