Method of repairing injured portion of refractory furnace-lining
AssigneesKureha Kagaku Kogyo Kabushiki Kaisha, NGK Insulators, Ltd.
InventorsNaoshi Kawabe, Toshikatu Haga, Taiitu Nakajima, Takeshi Takahashi, Hiroshi Shinoda, Shuji Hayakawa
Life of this patent
Estimating the term…
Abstract
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.
Claims5
A method of repairing an injured portion of a refractory furnace-lining which comprises:
- cutting off the injured portion of said lining through the outside furnace shell of said portion together with said shell using a supersonic flame jet cutter without using thermit;
- inserting a rigid refractory lining block, having substantially the same shape and size as said through-cut hole, into said through-cut hole;
- 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 without using thermit, followed by repairing the outside cut-off shell portion of the furnace.
A method of repairing an injured portion of a refractory furnace-lining which comprises:
- cutting off the injured portion of said lining through the outside furnace shell of said portion together with said shell using a supersonic flame jet cutter without using thermit;
- inserting a rigid refractory lining block, which has substantially the same shape as that of said through-cut hole and which is somewhat smaller than said through-cut hole to make a clearance between them, into said through-cut hole;
- and
- welding the surrounding periphery of the inserted block to the wall surface of said through-cut hole using the above-mentioned supersonic flame jet cutter as a welder without using thermit and using a welding rod of the same material as that of the lining material together with a binding substance, followed by repairing the outside cut-off shell portion of the furnace.
Dependencies are inferred from the claim text.