Heating – Processes of heating or heater operation – Including melting – vaporizing – sintering – expanding...
Patent
1985-05-20
1986-03-18
Camby, John J.
Heating
Processes of heating or heater operation
Including melting, vaporizing, sintering, expanding...
432105, 432118, 432134, F27B 1400, F27B 736, F27B 714, F27B 914
Patent
active
045765723
ABSTRACT:
Apparatus and method for effecting thermal reclamation of granular materials, particularly foundry sand and contaminated soil. In a first embodiment, a sand calciner system (10) includes a refractory-lined drum (12) mounted for oscillation about its longitudinal axis (14). An arrangement of plows (76) are provided along the bottom inside of the drum (12) for mixing the sand received through an inlet (54) and advancing it toward a discharge outlet (56) responsive to oscillation of the drum over a predetermined arc about the axis (14). The plows (76) are arranged in staggered rows with each plow having a transverse front surface facing the inlet (54), an inclined top surface, and an angled back surface facing the outlet (56). An aerator pipe (78) is provided in conjunction with the plows (76) to fluidize the sand and thereby effect more thorough mixing and exposure to burners (58) positioned along the upper side of the drum (12) for complete calcining. A tempering section (16) and screening section (18) are preferably connected to the discharge end of the drum (12) to pre-cool the calcined sand and then classify it for further handling and reuse in foundry cores and molds or the like. In a second embodiment, the system (130) is particularly adapted for cleaning soil contaminated with pentachlorophenol, creosote, oil, fuel or other hydrocarbon-rich liquids.
REFERENCES:
patent: 1892271 (1932-12-01), Hart
patent: 1972868 (1934-09-01), Case
patent: 4050635 (1977-09-01), Mueller et al.
patent: 4392949 (1983-07-01), Kruyer
Jensen Paul L.
Mueller Edward E.
Camby John J.
Whirl-Air-Flow Corporation
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