Ngk Insulators, Inc.

Kureha Kagaku Kogyo Kabushiki Kaisha

Hiroshi Shinoda

Hiroyuki Fukuda

Toshikatsu Haga

Hideharu Hayakawa

Naoshi Kawabe

Shuji Hayakawa

Toshikatu Haga

Taiitu Nakajima

Takeshi Takahashi

Stabilized zirconia refractories comprising fine block crystals of zirconia, having a high bulk density due to their dense texture and a higher bending strength than the conventional calcined zirconia refractories are disclosed. The stabilized electrocast zirconia refractories are obtained by pouring an electrofused melt of a blend of a zirconia-base material and a stabilizing agent into a mold and solidifying the poured melt from its lower portion by cooling the bottom part of the mold forcibly. Also the method for producing the stabilized electrocast zirconia refractories is disclosed.

Stabilized electrocast zirconia refractories

Disclosed herein is the reinforced electrocast zirconia refractories showing an extremely high bending strength obtained by the heat-treatment of stabilized electrocast zirconia refractories under the specified conditions.

Reinforced electrocast zirconia refractories

A method of repairing an injured portion of a refractory furnace-lining characterized by cutting off the injured portion of said lining through the furnace shell using a specific supersonic flame jet cutter; inserting a rigid refractory lining block having a shape which is similar to that of the through-cut hole of the furnace body; and welding the surrounding periphery of the inserted block to the contact surface of said through-cut hole using the above-mentioned supersonic flame jet cutter as a welder, followed by repairing the outside cut-off shell portion of the furnace body.

Method of repairing injured portion of refractory furnace-lining

Growing community of inventors

Gifu, Japan

Hiroshi Shinoda