Recovery of components of waste plasterboard

Details Recovery of components of waste plasterboard Recovery of components of waste plasterboard

1990-06-19

1992-03-31

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

Selective or differential comminution of mixed or bonded solids

241 24, 241DIG38, B02C 1912

Patent

active

051000636

ABSTRACT:
A method and apparatus for processing waste plasterboard consisting of sheets of paper or similar material adhered to a core of plaster of paris or the like, for recovering and separating the cover material from the gypsum of the core and for collecting each in a conveniently reusable form. A pair of rollers have parallel axes of rotation and are held to a variably close spacing under pressure while being counterrotated to grasp and crush pieces of plasterboard, delivering the paper and crushed gypsum core material to a vibrating screen which separates the two for separate collection and subsequent reuse as raw materials or for other purposes. A second crusher and screen may be used for additional separation of the materials.

REFERENCES:
patent: 1774318 (1930-08-01), Coomes
patent: 2962230 (1960-11-01), Dilley et al.
patent: 3684196 (1972-08-01), Hankins

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