Microporous heat-isolating brick

Abstract

The invention relates to a microporous heat-isolating brick which is prepared from the raw materials in percentage by weight: modified perlite, a silicon dioxide sol and micropowder aluminum oxide. The dosage of the silicon dioxide sol is reduced on the premise of guaranteeing the combining strength of the heat-isolating brick, so that the reheating linear change rate of a product is reduced, and the stability of the product is improved. The heat-isolating brick provided by the invention is a baking-free brick and is simple in preparation process, easy to realize, low in energy consumption, small in pollution and environment-friendly. High strength of the refractory brick and low thermal conductance of insulating cotton are perfectly fused together, and a new era of a light refractory insulating material is created. The product has the characteristics of being low in heat conductivity, small in volume density, light in weight and high in compression strength, is high in cost performance, long in service life, convenient to construct, small in damage on a human body and good in insulating property, expands a novel path of energy conservation and consumption reduction of a thermotechnical kiln and provides a reliable material guarantee for structural improvement and energy conservation and consumption reduction of a conventional thermotechnical kiln.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials for high-temperature kilns, and in particular relates to a microporous thermal insulation brick. 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. The structure of an industrial kiln is generally a refractory layer, an insulation layer, and a steel frame structure layer from the inside to the outside. The refractory layer is located in the innermost layer of the kiln and is in direct contact with the high-temperature medium. Therefore, the material of the refractory layer must have high refractory properties. ;The insulation layer is located in the middle layer of the kiln and does not directly contact with the high temperature medium. ...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the existing thermal insulation materials are refractory thermal insulation bricks or aluminum silicate series refractory cotton. Refractory thermal insulation bricks have a certain load-bearing strength, but the thermal conductivity is large, the thermal insulation effect is not good, and the price is expensive, causing economic pressure on enterprises. Moreover, the density and weight of existing insulation bricks are relatively large, which increases the load-bearing capacity of the steel structure, and due to the large weight and volume, it brings inconvenience to construction, low construction efficiency, and poor overall performance

The refractory cotton of aluminum silicate series has a better thermal insulation effect than refractory insulation bricks, but the refractory cotton has no bearing strength at all

Both have defects in actual use and cannot better meet the requirements of use

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