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Title:
HOT AIR BLOW TYPE FLUIDIZED BED FURNACE, ROTARY TYPE HEAT TREATMENT FURNACE, HEAT TREATMENT DEVICE, AND HEAT TREATMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2002/012813
Kind Code:
A1
Abstract:
A fluidized bed furnace wherein a particulate article is filled in a vessel, the particulate article being fluidized by hot air blown into the vessel to form a fluidized bed, allowing a workpiece to be heat-treated in the fluidized bed. A cantilever type dispersion pipe is installed in a fluidized bed and a hot air is blown off from a blow-off port formed in the dispersion pipe to face downward. A rotary type heat treatment furnace in which a workpiece is heat-treated while rotating in the fluidized bed is used as a solution treatment furnace and/or an aging furnace. After the waste gas from the solution treatment furnace has had its dust removed by a heat-resistant dust arrester, the waste heat the waste gas possesses is recovered by the heat exchanger and is made utilizable as a heat source for the aging surface. Further, the heat treatment device is equipped with an automatic conveyer for carrying workpieces into and out of each furnace. The heat treatment device can be satisfactorily used as a heat treatment furnace for metals such as Al alloys, improving conventional fluidized bed, reducing installation cost, saving space and preventing heat energy loss.

Inventors:
SAKAI TAKAYUKI (JP)
Application Number:
PCT/JP2001/006158
Publication Date:
February 14, 2002
Filing Date:
July 17, 2001
Export Citation:
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Assignee:
ASAHI TEC CORP (JP)
SAKAI TAKAYUKI (JP)
International Classes:
C21D1/53; C21D9/00; C22F1/043; C22F1/047; C22F1/057; F27B9/16; F27B15/10; C21D9/34; F27B9/40; F27D3/00; F27D17/00; F27D19/00; F27D21/00; (IPC1-7): F27B15/14
Foreign References:
JP2000017413A2000-01-18
JPS61185996U1986-11-20
JPH0244695U1990-03-27
JPH0194897U1989-06-22
JPS54128412A1979-10-05
JP2000144264A2000-05-26
Other References:
See also references of EP 1314944A4
Attorney, Agent or Firm:
Watanabe, Kazuhira (20-18 Asakusabashi 3-chome Taito-ku, Tokyo, JP)
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