Compositions: coating or plastic – Coating or plastic compositions – Bituminous material or tarry residue
Patent
1992-01-21
1993-10-12
Brunsman, David
Compositions: coating or plastic
Coating or plastic compositions
Bituminous material or tarry residue
588209, 588228, C09D19500
Patent
active
052521249
ABSTRACT:
A materials-handling plant is convertible for producing asphalt by either batch or continuous drum mix processes or remediating soil. Common to each process is a rotary drum and burner system for heating the materials, a primary separator and a baghouse for separating particulate matter from exhaust gas streams. For asphalt production by a batch process, aggregate is dried in the drying section of the drum and discharged for combination with asphalt in a batch tower. In the continuous drum mixer mode of asphalt production, dried aggregate is discharged into a drum mixing section for mixing with asphalt and recycle asphalt and conveyed to a storage silo. In both cases, particulate dust is separated from the exhaust gas stream and combined with the resulting asphalt product. For soil remediation, the contaminants in the soil are volatilized in the drum by contact with the hot gases of combustion. Dust particles in the exhaust gas stream are separated and contaminants thereon volatilized in the baghouse. The contaminant-free particles are recombined with the remediated soil in a mixer/cooler. The resulting exhaust gas stream is subjected to elevated heat to volatilize any residual contaminants.
REFERENCES:
patent: 5164158 (1992-11-01), Brashears et al.
Brashears David F.
Curtis Edward D.
Brunsman David
Thermotech Systems Corporation
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