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.

Title
Refractory material for electrolytic vessel, manufacture of this refractory material and electrolytic vat using this refractory material
Application Number
05-026306
Publication Number
1994-088278
Application Date
January 21, 1993
Publication Date
March 29, 1994
Inventor
Brunk Fred
Becker Wolfgang
Assignee
Dr C Otto Feuerfest
IPC
F27D 01/00
C04B 35/64
C04B 35/10
C25C 03/08