Drum mixer having a combined mixing and heating zone

Details Drum mixer having a combined mixing and heating zone Drum mixer having a combined mixing and heating zone

1989-07-26

1990-04-24

Stinson, Frankie L.

Agitating

Mortar mixer type

Methods

366 25, 366 56, B28C 546

Patent

active

049195387

ABSTRACT:
A combustion housing for surrounding a burner flame is provided at an intermediate location within a drum mixer. An annulus is formed by the combustion housing and the interior of the drum adjacent thereto. Hot virgin aggregate is mixed with cold recycle material within the annulus. The mixing materials are further heated by conduction from the combustion housing surface and extending structures extending from the combustion housing into the annulus. The combustion housing is also provided with a plurality of openings for allowing radiant heat to enter the annulus and heat the mixing materials and for circulating combustible by products of asphalt production into the combustion housing for burning.

REFERENCES:
patent: 4147436 (1979-04-01), Garbelman et al.
patent: 4298287 (1981-11-01), McCarter, III et al.
patent: 4332478 (1982-06-01), Binz
patent: 4481039 (1984-11-01), Mendenhall
patent: 4813784 (1989-03-01), Musil

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