Dust return system

Details Dust return system Dust return system

1989-10-02

1993-05-11

Hornsby, Harvey C.

Agitating

Mortar mixer type

With heating or drying

222145, 366 34, 366 35, 366149, 366151, 366178, 366182, B28C 546, B01F 1502

Patent

active

052095630

ABSTRACT:
A closed, pressurized dust return system for introducing aggregate dust into a stream of liquid asphalt is provided. Aggregate dust is dispensed through a valve from a receiving chamber into a mixing housing. The aggregate dust enters the mixing housing at an intermediate location therein. The liquid asphalt is introduced into the mixing housing through a separate conduit at a location thereon above the point of entry of the aggregate dust. The liquid asphalt and the aggregate combine within the mixing housing to form a slurry composition. A heating jacket substantially surrounds the mixing housing and a system for preventing liquid asphalt from backing up into the receiving chamber is also provided. The dust return system is particularly useful in an asphalt plant using a baghouse.

REFERENCES:
patent: 765975 (1904-07-01), Hooley
patent: 775414 (1904-11-01), Berrigan
patent: 1531594 (1925-03-01), Carozza et al.
patent: 1546335 (1925-07-01), Browne
patent: 2901988 (1959-09-01), Hepburn
patent: 4103350 (1987-07-01), Brock et al.
patent: 4184771 (1980-01-01), Day
patent: 4211490 (1989-07-01), Brock et al.
patent: 4475818 (1984-10-01), Bialkowski
patent: 4688945 (1987-08-01), Brazelton et al.
patent: 4801210 (1989-01-01), Gian
patent: 4838701 (1989-06-01), Smith et al.
Brochure "Dri-Flo The Only All Purpose Pneumatic Pump", 4 pages, Jul. 1, 1987.

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