Title:
SCREW CONVEYOR AND METHOD FOR SEPARATING GYPSUM FROM PAPER
Document Type and Number:
WIPO Patent Application WO/2022/264444
Kind Code:
A1
Abstract:
In this invention, when dihydrate gypsum is recovered from a waste gypsum board, paper derived from the waste gypsum board is transported by a screw conveyor and gypsum adhering to the paper is separated therefrom. This screw conveyor comprises: a screw shaft provided with a plurality of blades for sending an object to be transported in one direction; a drive means for rotating the screw shaft; and a casing for surrounding the screw shaft. The screw shaft includes a section having no blade at an intermediate part in the length direction and the bottom part of the casing is provided with a mesh.
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Inventors:
HIRANAKA SHINGO (JP)
Application Number:
PCT/JP2021/038414
Publication Date:
December 22, 2022
Filing Date:
October 18, 2021
Export Citation:
Assignee:
TOKUYAMA CORP (JP)
International Classes:
B07B1/00; B02C23/14; B07B1/04
Foreign References:
| US20120228198A1 | 2012-09-13 | |||
| JP2002316103A | 2002-10-29 | |||
| JP2009172498A | 2009-08-06 | |||
| CN211091814U | 2020-07-28 |
Attorney, Agent or Firm:
SHIOIRI Akira et al. (JP)
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