Double-incline shaft kiln

Details Double-incline shaft kiln Double-incline shaft kiln

1982-10-15

1984-09-25

Yuen, Henry C.

Heating

Shaft type

Having combustion products generated in or fed to shaft

432 97, 432 99, 432101, F27B 1500

Patent

active

044733526

ABSTRACT:
In a double-incline shaft kiln in which ore materials are charged into the furnace from the top of a vertical external portion of the shaft and are calcined by burners installed in the lower portion of the shaft, the calcining zone is effectively extended by the provision of an injector which causes the hot gas to flow in the lower portion of the shaft parallel to the flow of ore materials. Further, at the turnover locations for the ore descending through the shaft, the width of the shaft is broken into at least two portions which promotes a more even velocity of the material flow across the width of the shaft so as to enable combustion control and the prevention of the ash of solid fuel, such as coal, from mixing with the calcined material to cause discoloration and lumps.

REFERENCES:
patent: 233520 (1880-10-01), Knox et al.
patent: 534517 (1895-02-01), Prestone
patent: 1074519 (1913-09-01), Mullen
patent: 2597585 (1952-05-01), Howard
patent: 2670946 (1954-03-01), Royster
patent: 3142480 (1964-07-01), Azbe
patent: 3429462 (1969-02-01), Frederiksen et al.
patent: 3958919 (1976-05-01), Kjell-Berger
patent: 4289481 (1981-09-01), Yano
patent: 4346661 (1982-08-01), Nakamura
patent: 4351119 (1982-09-01), Meunier

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