Title:
【発明の名称】焼成装置における改良
Document Type and Number:
Japanese Patent JP2571374
Kind Code:
B2
Abstract:
In a method and apparatus for calcining calcium sulphate dihydrate or like heat sensitive material, in which a bed of the material is heated in a vessel (41) by the direct introduction of a hot gas through a tube (21) extending downwardly into the bed, the proportion of insoluble anhydrite (II) in the product is reduced by lowering the temperature of the hot gas before it contacts the material of the bed. This is done by indirect heat exchange through the wall of the tube with a relatively cool substance, for example, powdered gypsum or recycled exhaust gases, in an outer tube (26). The cooling material in the outer tube contacts the material in the bed before the latter is contacted by the hot gas.
More Like This:
Inventors:
DEUITSUDO JON BOORU
EDOWAADO UAANII
EDOWAADO UAANII
Application Number:
JP30356386A
Publication Date:
January 16, 1997
Filing Date:
December 19, 1986
Export Citation:
Assignee:
BPB INDUSTRIES PLC
International Classes:
F27B9/00; B01J6/00; C04B2/10; C04B2/12; C04B11/02; C04B11/028; C04B11/036; F27B15/10; (IPC1-7): B01J6/00; C04B2/10; C04B11/02; C04B11/028; F27B15/10
Domestic Patent References:
| JP5524599A | ||||
| JP5594634A | ||||
| JP5317998B2 | ||||
| JP5745610B2 | ||||
| JP551808B2 | ||||
| JP5828219B2 |
Attorney, Agent or Firm:
Mitsuo Adachi (1 outside)