Method and apparatus for treating waste products to recover the

Solid material comminution or disintegration – Processes – With heating or cooling of material

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241 24, 241 65, 241 791, 2411017, 241DIG31, 241DIG37, B02C 2102

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active

048136140

ABSTRACT:
Used products, which would otherwise be disposed of as waste, are subjected to low temperature lowering the temperature of the product to approximately the temperature of crystallization of the components thereof. The product at this lowered temperature is then crushed sufficiently to cause the components thereof to release sufficiently to be subsequently separated according to material. The separation steps can include subjecting the crushed material to magnetic or electrostatic fields, air flows caused by either pressurized air or vacuums, and mechanical separation with vibratory screens and rakes. The materials of the original product are sufficiently separated to enable them to be recycled into usable product. The particular example cited relates to vehicle tires with the materials recovered including rubber, fiber and metal bands.

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patent: 4084387 (1978-04-01), Schorach et al.
patent: 4240587 (1980-12-01), Letsch
patent: 4417697 (1983-11-01), Saiki et al.

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