Title:
MOLTEN GLASS CONDUIT STRUCTURE, AND DEVICE AND METHOD USING CONDUIT STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2014/174968
Kind Code:
A1
Abstract:
Provided are: a molten glass conduit structure, in which the erosion of a solid heat insulating material constituting a backup of a conduit can be prevented by a molten glass that exudes from a joint part between electrocast bricks constituting the conduit, without using any cooling means, and which can be manufactured at a reduced cost; a vacuum defoaming device using the conduit structure; and a method for vacuum defoaming a molten glass using the vacuum defoaming device.
The molten glass conduit structure, said conduit structure comprising a conduit and a backup provided on the periphery of the conduit, is characterized in that: the conduit is a hollow tube having electrocast bricks disposed in the longitudinal direction and circumferential direction thereof; the backup comprises a refractory layer provided on the outside of the conduit and a heat insulating material layer provided on the outside of the refractory layer; the refractory layer comprises a refractory brick layer consisting of refractory bricks disposed in the longitudinal direction and circumferential direction of the conduit and a monothilic refractory layer that is formed by laying a monothilic refractory, said monothilic refractory containing, in terms of mass percentage of oxide(s), 30-100% of Al2O3 and 0-70% of SiO2, and then sintering the monothilic refractory; the heat insulating material layer comprises a solid heat insulating material layer comprising a solid heat insulating material disposed in the longitudinal direction and circumferential direction of the conduit; and the electrocast bricks constituting the conduit, the monothilic refractory constituting the monothilic refractory layer and the refractory bricks constituting the refractory brick layer are selected in such a manner that, when the molten glass passes through the conduit, a site being at the same temperature as the pour point of the glass is positioned within the heat insulating material layer.
Inventors:
NAGAI KENSUKE (JP)
HAMAMOTO HIROAKI (JP)
KABASHIMA SHUJI (JP)
HAMAMOTO HIROAKI (JP)
KABASHIMA SHUJI (JP)
Application Number:
PCT/JP2014/058350
Publication Date:
October 30, 2014
Filing Date:
March 25, 2014
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
C03B5/225; C03B5/43; C03C3/078; C03C3/087
Domestic Patent References:
| WO2007020754A1 | 2007-02-22 | |||
| WO2007020754A1 | 2007-02-22 | |||
| WO2009125750A1 | 2009-10-15 |
Foreign References:
| JP2000007346A | 2000-01-11 | |||
| JPS6418937A | 1989-01-23 | |||
| JPH02180719A | 1990-07-13 | |||
| JP2003128422A | 2003-05-08 |
Other References:
"Mortar/Tamping Materials", GLASS YOKAIRO-YO FUTEIKEI TAIKABUTSU, 20 June 2014 (2014-06-20), XP055290407, Retrieved from the Internet
See also references of EP 2990387A4
See also references of EP 2990387A4
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
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