Fireproof repairing agent for industrial kiln

Abstract

The invention relates to the technical field of high temperature refractories, in particular to a fireproof repairing agent for an industrial kiln. The fireproof repairing agent includes alumina micropowder, nano silica, kyanite powder, nano zirconia, ceramic fiber, polyvinyl alcohol, aluminum silicon sol, deionized water, metal quantum dot composite, carboxymethyl cellulose sodium, polyethylene glycol and dispersing agent, wherein the alumina micropowder is alpha type alumina with a grain size of 20-40 nm; the dispersing agent is one of ammonium polyacrylate, sodium tripolyphosphate and sodium hexametaphosphate; the ceramic fiber is selected from a group consisting of a high alumina fiber, an aluminum oxide polycrystalline fiber and aluminum silicate fiber; and the ceramic fiber has a fiber length of 2-4 mm. The repairing agent has the advantages of high refractoriness, good adhesion, large bonding strength, good thermal expansion and outstanding erosion resistance.

Description

technical field [0001] The invention relates to the technical field of high-temperature refractory materials, in particular to a refractory repair agent for industrial furnaces. Background technique [0002] Industrial kiln is a kind of equipment made of refractory materials for calcining materials or firing products. Industrial kilns can be divided into flame kilns and electric heating kilns according to the different heat sources used; the kiln fuels of flame kilns are mostly heavy oil, light diesel oil or gas, natural gas; the structure is composed of kiln chambers, combustion equipment, ventilation equipment, transportation equipment, etc. It consists of four parts. Most electric kilns use electric furnace wire, silicon carbide rods or molybdenum disilicide as heating elements. The structure is relatively simple, and the main structure is the kiln chamber. In specific industries, there are more subdivided types of kilns, such as cement rotary kilns, glass tank kilns, s...

AI Technical Summary

Problems solved by technology

[0006] The high-chromium refractory mud provided by the patent application number CN200810049036.3 is a special type of repairing agent, which can be well matched with high-chrome bricks and improve the overall life of the Texaco gasifier; however, the repairing agent of this type Narrow application range, poor compatibility with refractory materials in aluminum high-temperature kilns

Patent application number CN201010582755.9 discloses an alkaline high-temperature refractory mud, which is made of aluminum powder, water glass and yellow dextrin, and has the advantages of high refractoriness, high bonding strength, and stable volume. However, the compatibility and bonding strength between the adhesive and refractory bricks and other materials are insufficient, and it is easy to fall off under the condition of strong fluidity, and the resistance to liquid phase erosion is poor.