Title:
REFRACTORY MATERIAL FOR ELECTROLYTIC VESSEL, MANUFACTURE OF THIS REFRACTORY MATERIAL AND ELECTROLYTIC VAT USING THIS REFRACTORY MATERIAL
Document Type and Number:
Japanese Patent JP3228808
Kind Code:
B2
Abstract:
PURPOSE: To give the excellent to corrosion resistance against fluorine-containing gas by composing the material of a shaped brick of Al2O3 and TiO2 and constituting it with a fired material forming acicular TiO2 crystal.
CONSTITUTION: The brick is formed and hardened after combining >50 wt.% Al2O3 and 2.5-10 wt.% TiO2 and mixing a binder. If necessary, the firing is executed to manufacture the refractory material. This material undergoes the process of forming the acicular TiO2 crystal and the crystal containing TiO2 during acting fluorine-containing gas to the free surface, particularly, to the boundary surface of intergrain hollow space at 700-1000°C in the zone exposed with the fluorine, and the crystals are grown in porous space in irregular state. The brick formed from this material has about 10-35 vol.% porosity and about 5-120 MPa pressure resistance. This brick is used for an electrolytic vat.
Inventors:
Wolfgang Becker
Fred brunck
Fred brunck
Application Number:
JP2630693A
Publication Date:
November 12, 2001
Filing Date:
January 21, 1993
Export Citation:
Assignee:
D. T. Ott Feuerfest Gesellschaft Mitt Beschlenktel Haftung
International Classes:
C04B35/10; C04B35/101; C04B35/64; C04B35/66; C25C3/08; F27D1/00; (IPC1-7): C25C3/08; C04B35/101
Domestic Patent References:
| JP6260887A | ||||
| JP6221769A | ||||
| JP60159187A | ||||
| JP5681693A |
Attorney, Agent or Firm:
Tatsuya Masuda (1 outside)