Process for the production of pressed bodies from municipal refuse
AssigneeElopak A/S
InventorsTerje Martin Halmo, Liv Skoglund
Life of this patent
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Abstract
Process for the production of pressed bodies from municipal refuse or waste, especially refuse having a content of wood-based materials, plaster and animal and vegetable substances, in which the refuse is subjected to a treatment for reducing particle size as well as for the separation of metals and similar hard, inorganic fractions. After collection, the refuse is divided up without the addition of fluid and is thereafter dried in a hot gas to reduce the water content. The particles of refuse material are screened in an air stream to separate heavy fractions and thereafter are pressed to pressed bodies during the addition of an adhesive and/or binding agent.
Claims8
In a process of producing pressed bodies comprising preparing particulate material, adding adhesive binder thereto and pressing the resulting mixture into pressed bodies, the improvement which comprises preparing said particulate material from municipal refuse by the steps of:
- (a) dividing up collected refuse, without the addition of fluid, to reduce its particle size;
- (b) drying the refuse particles in a hot gas until their water content is reduced to less than 15 weight percent;
- and
- (c) screening the resulting particles of refuse in a stream of air in order to separate particles of at least those heavy fractions of metal, glass and stone thereby leaving behind the desired particulate material.
Dependencies are inferred from the claim text.