Title:
How to expand mineral material by independent air bubbles
Document Type and Number:
Japanese Patent JP6165742
Kind Code:
B2
Abstract:
The invention relates to a method for producing an expanded granulate from sand grain-shaped mineral material (1) with a propellant, wherein the material (1) is fed into a vertically upright furnace (2) from above and said material (1) falls along a drop section (4) through multiple heating zones (5) in a furnace shaft (3) of the furnace (2), wherein each heating zone (5) is heatable using at least one independently controllable heating element (6), and the material (1) is heated to a critical temperature at which the surfaces (7) of the sand grains (15) plasticize and the sand grains (15) are expanded by the propellant. In order to enable setting a closed surface of the expanded granulate in a purposeful fashion, it is provided in accordance with the invention that upon detection of a first reduction in the temperature of the material (1) between two successive positions (9) along the drop section (4) the heating elements (6) are controlled along the remaining drop section (4) depending on the critical temperature.
Inventors:
Brunn Mile, Ernst Irwin
Application Number:
JP2014533907A
Publication Date:
July 19, 2017
Filing Date:
October 04, 2012
Export Citation:
Assignee:
Binder und Company Akchen Gesell Shaft
International Classes:
C04B38/00; F27B1/09; F27B1/14; F27B1/24; F27B1/26
Foreign References:
| US5002696 |
Other References:
ZAEHRINGER KATHARINA,DEVELOPMENT OF A SIMULATION MODEL FOR THE EXPANSION OF PERLITE,GLASS SCIENCE AND TECHNOLOGY,ドイツ,DEUTSCHE GLASTECHNISCHE GESELLSCHAFT,2001年 1月 1日,V74 N3,P57-64
Attorney, Agent or Firm:
Kurata Masatoshi
Yoshihiro Fukuhara
Nobuhisa Nogawa
Takashi Mine
Katsu Sunagawa
Yoshihiro Fukuhara
Nobuhisa Nogawa
Takashi Mine
Katsu Sunagawa