Indirectly heated rotary calciner having weighted cylindrical ex

Details Indirectly heated rotary calciner having weighted cylindrical ex Indirectly heated rotary calciner having weighted cylindrical ex

1981-11-23

1983-08-23

Camby, John J.

Heating

Tumbler-type rotary - drum furnace

432112, F27B 700, F27B 608

Patent

active

044001533

ABSTRACT:
An indirectly heated rotary calciner or dryer for high temperature operation, whereby it is important to reduce cylinder stress to achieve a reasonable life expectancy of the heated section of a cylinder even when the most exotic of metal alloys is used for its construction.
The present invention is able to reduce the stress in the heated section of an indirectly heated rotary calciner or dryer cylinder by the use of either long extensions beyond the cylinder's riding ring supports or by shorter, weighted extensions beyond said riding ring supports, which act as moment arms and thus permit a calciner to be operated at substantially higher temperatures than would be the case had the invention not been employed, while still achieving good life expectancy.

REFERENCES:
patent: 1503186 (1924-07-01), Fasting
patent: 1584381 (1926-05-01), Krebs
patent: 2098999 (1937-11-01), Brown
patent: 4191530 (1980-03-01), Bearce

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