High-strength and low-thermal-conductivity precast brick

Abstract

The invention discloses a high-strength and low-thermal-conductivity precast brick and belongs to the technical field of refractory materials. The precast brick is prepared from, by mass, 15-35 partsof mullite, 10-25 parts of alumina hollow balls, 5-15 parts of rutile powder, 5-15 parts of high bauxite powder, 3-8 parts of micro silica powder, 3-8 parts of micro alumina powder, 3-10 parts of high-alumina cement, 5-10 parts of expanded perlite, 0.15-0.18 part of sodium tripolyphosphate and 0.13-0.16 part of explosion-proof fibers. The precast brick is used for replacing castables in the priorart and has the advantages of being convenient to construct, and a cement kiln built by the bricks is good in thermal shock resistance, excellent in thermal insulation property, short in constructionperiod and lower in periodical maintenance cost.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a prefabricated brick with high strength and low thermal conductivity. Background technique [0002] At present, many parts of the cement kiln lining wall are formed by pouring materials at the construction site. Finally, it needs to be cured and baked before it can be put into use. On the whole, the amount of water added to the on-site pouring is random, the pouring quality is not easy to control, the construction labor intensity is also high, the construction period is long, and the kiln made of existing castables Furnace lining often has defects such as low castable strength, poor wear resistance, poor thermal shock stability, and large thermal conductivity due to construction and other factors. The outer wall of the kiln shell has high temperature, large heat loss, and short service life. More frequent, time-consuming and labor-intensive and affect production. ...

AI Technical Summary

Problems solved by technology

[0002] At present, many parts of the cement kiln lining wall are formed by pouring materials at the construction site. Finally, it needs to be cured and baked before it can be put into use. On the whole, the amount of water added to the on-site pouring is random, the pouring quality is not easy to control, the construction labor intensity is also high, the construction period is long, and the kiln made of existing castables Furnace lining often has defects such as low castable strength, poor wear resistance, poor thermal shock stability, and large thermal conductivity due to construction and other factors. The outer wall of the kiln shell has high temperature, large heat loss, and short service life. More frequent, time-consuming and labor-intensive, and affect production

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