A preparation method for combining bricks in various parts of blast furnace hot air duct without cutting or grinding

Abstract

The invention discloses a preparation method for combining bricks in various parts of a blast furnace hot air duct without cutting or grinding, including 1) designing a single brick into a small block, and making a mold according to the shape of the small block, and the size and shape of the single brick are based on actual conditions. Production requirements and the parameters of the friction press are designed; 2) the materials of the combined brick are fully mixed; 3) the mold is installed on the friction press; 4) the combined brick material is loaded into the mold on the friction press for pressurization; 5) Sintering, this step adopts a weak oxidation high-temperature sintering process, and no cutting and grinding process is performed after the sintering is completed. The beneficial effects of the present invention are: due to the reduction of each single brick, the combined brick can be formed by a friction press; the design and manufacturing process of the mold is further improved, the molding degree is eliminated, and the combined brick is formed by one-time machine pressing Brick single brick can be realized; after the product is fired, it can be pre-built without cutting and grinding, which protects the surface glaze layer of the product.

Description

technical field [0001] The invention relates to a method for preparing composite bricks in various parts of a blast furnace hot air duct without cutting or grinding. Background technique [0002] Aiming at the local refractory lining of the hot blast pipeline peeling off, cracking and bricks falling off, cracking and falling bricks in the hot blast pipeline due to the deformation of the hot blast pipeline, thermal stress, mechanical vibration and gas flow erosion, etc. The damage to the mouth combination brick parts (branch pipe, vertical pipe, three-way mouth, combustion port, air inlet, and backflow break) is more serious, which seriously restricts the smooth production of the blast furnace. [0003] As one of the improved technical solutions for the existing technical problems, the application number is 200720014421.5, which discloses the working layer brick of the hot air duct. Its technical solution relates to a refractory brick in the metallurgical industry, specifica...

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Problems solved by technology

[0025] The purpose of the present invention is to provide a method for preparing combined bricks in various parts of the blast furnace hot blast pipeline without cutting or grinding, which adopts a one-time forming method without cutting and grinding process, so as to solve the problem that the blast furnace hot blast stoves at home and abroad appear in a relatively short period of time when they are put into production Due to hot air pipe deformation, thermal stress, mechanical vibration and gas flow erosion and wear, the local refractory lining of the hot air pipe is peeled off, cracked and bricks are dropped

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