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Patent Searching and Data


Title:
APPARATUS AND METHOD FOR CALCINATION OF GYPSUM
Document Type and Number:
WIPO Patent Application WO/2016/136485
Kind Code:
A1
Abstract:
[Problem] To improve the flowability of a material gypsum deposit layer in a furnace to thereby prevent the development of "unevenness" in calcined gypsum, while also reducing fuel consumption in a calcining furnace. [Solution] A gypsum calcining device is provided with: a gypsum calcining furnace (1, 3-7) having a furnace inner-wall surface that is circular or annular in plan; and a combustion pipe (2) disposed at the center of a furnace body, wherein material gypsum (M) in the furnace is calcined or dried by a high-temperature gas jet flow (Hg) ejected from a lower part of the combustion pipe. The calcining furnace includes a fixed-blade or movable-blade type auxiliary device for urging the material gypsum in the vicinity of the furnace inner-wall surface in a circumferential direction of the calcining furnace, or assisting the motion in the circumferential direction of the material gypsum in the vicinity of the furnace inner-wall surface. The auxiliary device includes a plurality of fixed blades (10) arranged at angular intervals in the circumferential direction in a lower-end outer peripheral area of the combustion pipe, or an agitator (30) penetrating through a conical surface or an inner peripheral surface constituted by the furnace inner-wall surface.

Inventors:
NIIMI KATSUMI (JP)
ENDO KAZUMI (JP)
TAKENAKA AKIRA (JP)
NITOH KOUJI (JP)
Application Number:
JP2016/054065
Publication Date:
September 01, 2016
Filing Date:
February 12, 2016
Export Citation:
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Assignee:
YOSHINO GYPSUM CO (JP)
International Classes:
C04B11/028; B01J6/00; B09B3/00; C01F11/46; F26B3/08; F27B15/00; F27D7/04
Foreign References:
US4915623A1990-04-10
US5013237A1991-05-07
JP2006199576A2006-08-03
Other References:
See also references of EP 3263536A4
Attorney, Agent or Firm:
SHIMAZOE, Yoshihiko (JP)
Yoshihiko Shimazoe (JP)
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