APPARATUS AND METHOD FOR CALCINATION OF GYPSUM

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:

PCT/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:

US4915623A	1990-04-10
US5013237A	1991-05-07
JP2006199576A	2006-08-03

Other References: