Method for constructing refractory materials at pellet rotary kiln bellow port

Abstract

The present invention, belonging to the technical field of pellet rotary kiln bellow port, particularly relates to a method for constructing refractory materials at pellet rotary kiln bellow port, and the method comprises the steps as follows: a row of U-shaped nails are welded on the bellow steel plate at one side of a prefabricated component of the rotary kiln top at the bellow port, two rows of U-shaped nails are welded on the other side of the bellow steel plate, wherein the two rows of the U-shaped nails are equidistantly arranged above and below the previously-mentioned row of U-shaped nails; the transverse spacings between the U type nails are 90mm to 150mm, and the vertical spacings between the U-shaped nails are 60mm to 120mm; asbestos felts are arranged between the prefabricated component of the top of the rotary kiln and the bellow steel plate and on the partial surface of the prefabricated component of the top of the rotary kiln adjacent with the bellow steel plate, and refractory materials are cast at the position where the two rows of U-shaped nails are welded. The lengths of the U-shaped nails are 40m to 80m, and the layer thicknesses of the cast refractory material are 90m to 160m. The method for constructing refractory materials at pellet rotary kiln bellow port provided by the invention prolongs the service life of the refractory materials made at the pellet rotary kiln bellow port, satisfies the requirement of production, decreases the maintenance loads, and reduces the production cost.

Description

technical field [0001] The invention belongs to the technical field of refractory material for bellows mouth of a pelletizing rotary kiln, and in particular relates to a construction method for a refractory material for a bellows mouth of a pelletizing rotary kiln. Background technique [0002] The construction method of the original design of the bellows mouth of the pellet rotary kiln is to weld the steel structural parts embedded in the refractory bricks to the steel structure of the bellows mouth, so as to connect the refractory bricks and the steel structure of the bellows as a whole. The gaps between the bricks are sealed with asbestos, and the exterior is sprayed with spray paint. When the steel structure of the bellows mouth is heated and deformed, the welding part is oxidized, which reduces the connection strength, until the whole refractory brick falls off, and the bellows mouth loses its sealing effect, which affects the thermal balance of the system, wastes energ...

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Problems solved by technology

When the steel structure of the bellows mouth is heated and deformed, the welding part is oxidized, which reduces the connection strength until the whole refractory brick falls off, and the bellows mouth loses its sealing effect, which affects the thermal balance of the system, wastes energy, and reduces the service life of the bellows mouth

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