GB 2598519 A

Gypsum recycling

(22) 02.12.2021

(43) 02.03.2022

(57) (Abstract title) Gypsum plasterboard recycling: A method and system (1, Fig 1) for recycling plasterboard waste incorporating non-plasterboard waste materials such as wires, wall plugs etc, comprises a primary crushing station (3, Fig 3), in which plasterboard waste is fragmented by a coal crusher. Fragmented waste then goes to a primary separation station (4) having a trommel screen with 20-30 mm mesh and internal ribs, in which the crushed plasterboard waste material is separated into a process stream and a waste stream. Process stream material is passed through a secondary crushing station (8) in the form of a hammer mill, and waste stream material is passed through a primary waste-separation station (5), in which it falls by gravity whilst being subjected to an airflow to separate paper waste fragments from the waste stream towards a recycled paper bay. A secondary separation station having a flat deck vibratory screen with 6-10 mm mesh may be positioned between primary and secondary crushing stations, Magnetic separation may occur prior to the primary crushing station / stage, in which three stages of magnetic separation may be utilised. A pre-crushing stage where material may be fragmented by a pair of conical toothed rollers may also be included before the primary crushing stage is carried out.

(71) Roy Hatfield Limited (Incorporated in the United Kingdom) Fullerton Road, Rotherham, S60 1DH, United Kingdom


Related articles:

Issue 2012-09

The gypsum industry presents its recycling concept

Recycling should lead to closed loop economic circles in the ideal situation. The German gypsum industry shows how to make this ideal situation reality. The National Association has developed a unique...

Issue 2020-9 US 2020/0123055 A1

Recycling method of dihydrate gypsum from waste gypsum boards

(22) 22.10.2019 (43) 23.04.2020 (57) Gypsum derived from waste gypsum boards is calcined and converted into gypsum granules including hemihydrate and/ or anhydrous type III gypsum. The calcined gypsum...

Issue 2018-11 HUE037124 (T2)

Gypsum plasterboard production plant and method for producing a gypsum plasterboard

(22) 26.06.2013 (43) 28.08.2018 (57) Summary of the corresponding patent WO2014206452 (A1): The invention relates to a gypsum plasterboard production plant, comprising at least one circulating...


Recycling gypsum plasterboard: Turning construction waste into a chemically pure resource

Gypsum is a very popular building material. It is not only used in the cement industry, but above all for indoor refurbishing projects. Construction is virtually unthinkable without gypsum, whether as...


Ecological questions on the agenda

At the invitation of the Chinese Gypsum Association, a delegation of the Bundesverband der Gipsindustrie e.V. (Association of the German Gypsum Industry) visited China on 13.01.2014. The main...