High-strength fire-resistant thermal insulation material

Abstract

The invention discloses a high-strength fire-resistant thermal insulation material. A preparation method of the high-strength fire-resistant thermal insulation material comprises the following steps: preparing a shaped product with the required size by using expanded vermiculite, clay, refractory cement and dextrin as initial materials and adding a waterproof agent and a binding agent in a mechanical pressing forming manner, wherein a nano-modification organic silicon rubber solution is used as the waterproof agent, and the binding agent is an inorganic binding agent, drying, carrying out heat preservation, and baking at a high temperature, thus obtaining the high-strength fire-resistant thermal insulation material. The high-strength fire-resistant thermal insulation material has the advantages of good structure and volume stability, high strength, low cost, simple process, convenience for construction and baking, environmental protection, safety and the like.

Description

technical field [0001] The invention relates to a thermal insulation material, in particular to a high-strength refractory thermal insulation material with expanded vermiculite, clay, refractory cement and dextrin as initial materials. Background technique [0002] In the industrial field, for all kiln bodies and furnace bodies that are higher than normal temperature, especially high-temperature kilns and high-temperature furnaces, in order to prevent heat loss, insulation materials are used in the furnace body or kiln body. At present, aluminum silicate ceramic fiber boards or fiber blankets are often used as insulation materials between the refractory lining and iron shell of kilns at temperatures above 800 °C. However, fibrous insulation materials generally have a loose and porous structure, and strong water absorption is not conducive to pouring construction. In addition, crystallization will occur after long-term use at 800-1000°C, which will make the fibers brittle and...

AI Technical Summary

Problems solved by technology

At present, aluminum silicate ceramic fiber boards or fiber blankets are often used as insulation materials between the refractory lining and iron shell of kilns at temperatures above 800 °C. However, fibrous insulation materials generally have a loose and porous structure, and strong water absorption is not conducive to pouring construction. In addition, crystallization will occur after long-term use at 800-1000°C, which will make the fibers brittle and pulverized, causing the insulation layer to collapse and become thinner, which will cause the kiln lining structure to deform, loosen, and bricks will fall off. Aluminum leakage phenomenon, used as the insulation layer between the refractory lining and the iron shell of the rotary kiln, ladle, tundish, torpedo car, etc., will easily cause the surface temperature to rise in the middle and later stages, and the iron shell will deform, affecting the heat preservation and overall stability of the furnace lining