High-temperature wear-resistant ceramic cement for boiler flue

Abstract

The invention relates to a boiler flue high-temperature wear-resistant ceramic cement, which includes a high-temperature binder with a component ratio of 1:3.5 and wear-resistant ceramic powder, and the high-temperature binder includes a component ratio of 100:0.5: 1.5:1.5 sodium silicate, sorbic acid, borax and bentonite, the wear-resistant ceramic powder includes white corundum with a component of 20% and a diameter range of 1-3 mm, and a component of 30% with a diameter range of 0 -1 mm white corundum, 20% silicon carbide particles with a diameter ranging from 0 to 1 mm, 20% white corundum with 180 mesh, 5% three-dimensional silicon carbide particles with a diameter of about 5 microns Aluminum oxide micropowder, silicon micropowder with a component of 2.5% and a diameter of about 1 micron, and a component of 2.5% aluminum dihydrogen phosphate. The boiler flue high-temperature wear-resistant ceramic cement adopts the method of coating, which is convenient for construction, does not have high requirements on the surface of the substrate, can repair local wear parts, and can resist high-temperature corrosion and particle erosion under complex working conditions. Erosion wear.

Description

technical field [0001] The invention relates to a ceramic cement, in particular to a high-temperature wear-resistant ceramic cement for a boiler flue. Background technique [0002] The inner wall of the ash conveying system of the thermal power plant, cement plant waste heat power generation, etc., is scoured by the high-temperature flue gas for a long time, and the flue gas carries fine ash particles, which will cause erosion and wear to the inner wall of the ash conveying system. The ash conveying system is usually welded by ordinary steel plates, without any anti-wear measures on the inner wall. Under the synergistic effect of high-temperature corrosion and ash particle erosion, the wear of the inner wall of the flue will be accelerated, resulting in early failure of the material. At present, the traditional anti-wear technology is mainly surfacing welding and thermal spraying wear-resistant coating. These two processes have better actual effect, but the cost is higher. ...

AI Technical Summary

Problems solved by technology

At present, the traditional anti-wear technology is mainly surfacing welding and thermal spraying wear-resistant coating. These two processes have better actual effect, but the cost is higher.

At the same time, the site construction of this process is difficult, and it is difficult to meet the complex conditions of site construction.

Related patent documents, such as patent No. CN200910184637.X "Manufacturing Method of Alumina Ceramic Wear-resistant Elbow", are mainly aimed at process design, and patent No. CN200710072200.8 "Boiler pulverized coal pipeline, ash removal pipeline plugging resistance Grinding mud and its production method" is mainly aimed at the plugging of pulverized coal pipelines and ash removal pipelines. Although it has a certain wear resistance, it cannot resist the erosion and wear of ash particles in the flue gas, and the actual effect is average.

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