Novel lightweight mullite brick and fabrication method thereof

Abstract

The invention discloses a novel lightweight mullite brick and a fabrication method thereof. According to the fabrication method, partial high-strength lightweight mullite aggregate, composite organic pore forming material and a high-polymer bonding agent are added to mullite which is used as a main raw material. The novel lightweight mullite brick has a lower heat conductivity coefficient, high compressive strength, high service temperature and certain erosion resistance, and can be extensively applied to parts of various sets of thermal equipment, which are not in direct contact with melt and materials. The novel lightweight mullite brick can replace a heavyweight high-alumina brick and a clay brick to be used as a working layer at some parts of various sets of thermal equipment, the deadweight of the thermal equipment can be reduced by more than 20%, and energy can be saved by above 25%.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a novel lightweight mullite brick and a preparation method thereof. Background technique [0002] With the gradual shortage of energy and people's increasing emphasis on environmental protection, there are many heavy industrial enterprises in our country, and the production is inseparable from thermal kilns, which are large energy consumers. At present, the non-critical parts of thermal kilns at home and abroad generally use heavy high-alumina bricks or clay bricks as the working layer, and the bricks and steel structures are filled with aluminum silicate fiber cotton or calcium silicate boards as insulation layers to achieve energy saving purposes. . However, due to the large impurity content and poor corrosion resistance of these bricks, they are easy to crack during use, which causes the steel structure of thermal equipment to deform due to abnormal temperature r...

AI Technical Summary

Problems solved by technology

However, due to the large impurity content and poor corrosion resistance of these bricks, they are easy to crack during use, and the steel structure of thermal equipment is deformed due to abnormal temperature rise, causing hidden dangers to the normal operation of the equipment.

Moreover, these bricks have high density and high thermal conductivity. Although there is an insulation layer to prevent heat loss, the effect is limited.

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