Repairing method of rotary kiln liner fireproof material

Abstract

The invention relates to the technical field of rotary kiln liner fireproof materials, particularly to a repairing method of a rotary kiln liner fireproof material. The repairing method comprises the following steps of: 1. removing a ring formation layer on the surface of the rotary kiln liner fireproof material to avoid decompacting an unloosed part through excessive mechanical vibration force; 2. welding a metallic network frame structure, and fixing the metallic network frame structure onto a rivet of a kiln burnt brick or a casting strap through a U-shaped nail and a Y-shaped nail; 3. brushing a bond on a working surface, casting a fireproof material on the brushed bond to form a fireproof material casting strap, and arranging a furnace body shrinkage joint plate between the casting straps; 4. after finishing casting, curing for 65-80 hours to achieve the optimal cold strength of the fireproof material; and 5. preserving heat and baking a furnace in segments to the temperature of 600 DEG C. The repairing method of the rotary kiln liner fireproof material can effectively prevent the continuous falling-off of a rotary kiln liner and avoid the influence generated by hot spot accidents; and the high temperature segment and the low temperature segment of a rotary kiln are relatively synchronous, thereby prolonging the service life of the kiln liner.

Description

technical field [0001] The invention relates to the technical field of rotary kiln lining refractory materials, in particular to a method for repairing rotary kiln lining refractory materials. Background technique [0002] The rotary kiln is the grate machine - the heart part of the production of oxidized pellets in the rotary kiln. The production process is under high temperature conditions, a dynamic and multi-factor complex system. During the operation of the kiln lining, under the action of various stresses, This will lead to delamination and peeling of the refractory lining, loosening and pulling out, cracking and bursting, and brick red kiln falling, so as to affect the service life of the kiln lining. Therefore, it is imperative to seek a new method to synchronize the service life of the kiln lining with the overall overhaul time. [0003] The service life of rotary kiln lining refractories is generally one and a half to two years, but due to factors such as ring for...

AI Technical Summary

Problems solved by technology

[0003] The service life of rotary kiln lining refractory materials is generally one and a half to two years, but due to factors such as ring formation, wear, heat radiation, frequent temperature rise and fall caused by accidents, the service life of some refractory materials is severely reduced, and the service life is usually more than one year. In the future, the thickness of the kiln lining in the high-temperature zone will be reduced from the original 283mm to an average thickness of about 200mm, and some thicknesses will be 130mm, of which the thickness of the insulation brick will be 60mm. Using this pouring method, it will start to fall off after heating up production, which loses the meaning of repairing the kiln lining

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