Heating – Tumbler-type rotary - drum furnace – Having combustion products generated in or fed to drum
Patent
1992-02-07
1993-06-08
Yuen, Henry C.
Heating
Tumbler-type rotary - drum furnace
Having combustion products generated in or fed to drum
432 58, 432 14, F27B 1500
Patent
active
052173682
ABSTRACT:
A process and apparatus to treat powdered minerals placed in gaseous suspension by thermal exchange. The process includes the steps of preheating the minerals to be treated by the exhaust gas from a furnace. The minerals are then treated in the furnace. The minerals are then cooled with a stream of air prior to introducing the stream of air into the furnace. The furnace exhaust gases are filtered before being released into the atmosphere. A majority of the filtrate is mixed with the minerals leaving the furnace. The remainder of the filtrate is placed in suspension in a current of air diverted from the current of warm air which cools the minerals leaving the furnace. The remainder of the filtrate is separated from the air. The remainder of the filtrate is then mixed with the treated minerals and at least partially cooled. The diverted air is mixed with the furnace exhaust gases.
REFERENCES:
patent: 3836323 (1974-09-01), Engel
patent: 4094626 (1978-06-01), Boyhont et al.
patent: 4669976 (1987-06-01), Hatano et al.
patent: 4685970 (1987-08-01), Krennbauer et al.
patent: 4695325 (1987-09-01), Enkegaard
patent: 4715811 (1987-12-01), Lawall
patent: 5026275 (1991-06-01), Hundebol
FCB
Yuen Henry C.
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