Title:
RECYCLE UTILIZATION OF WASTE PLASTERBOARD
Document Type and Number:
Japanese Patent JPH1036149
Kind Code:
A
Abstract:
To provide a route of the efficient use of waste plasterboards by removing paper and contaminants such as organic admixture included in waste plasterboards to modify the waste material to a plaster suitable for cement composition.
In this method for efficiently using waste plasterboards, the waste boards are heated at 600-1,100°C to combust and remove paper and organic admixtures in the waste plasterboard and converted to anhydrous gypsum type II suitable for formulating in cement composition. Further, raw materials containing the waste plasterboards are heated at 1,200-1,400°C to produce an Irwin cement clinker. Waster plaster boards, most of which are disposed now, can be effectively utilized.
Inventors:
ICHIKAWA KAZUHIKO
KANETANI MUNETERU
SEKIGUCHI MASAO
SAKAMAKI KATSUYUKI
FUJIMOTO IZUMI
NAKANISHI HIROSHI
SUEOKA TADASHI
KANETANI MUNETERU
SEKIGUCHI MASAO
SAKAMAKI KATSUYUKI
FUJIMOTO IZUMI
NAKANISHI HIROSHI
SUEOKA TADASHI
Application Number:
JP19312296A
Publication Date:
February 10, 1998
Filing Date:
July 23, 1996
Export Citation:
Assignee:
CHICHIBU ONODA CEMENT CORP
International Classes:
C01F11/46; C04B7/24; C04B11/05; B09B3/00; C04B11/26; (IPC1-7): C04B7/24; B09B3/00
Attorney, Agent or Firm:
Miyuki Ariga (3 outside)
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