Low-thermal-conductivity mullite tin bath combined top cover brick

A technology of mullite tin and low thermal conductivity, applied in the field of refractory materials, can solve the problems of poor thermal insulation performance and thermal shock resistance, fast heat dissipation, large heat capacity, etc., and achieve good thermal insulation effect, high refractoriness and small thermal conductivity Effect

Active Publication Date: 2015-02-04
HENAN ZHONGYUAN SPECIAL REFRACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low thermal conductivity mullite tin bath combined roof brick, which solves the problems of large heat capacity, fast heat dissipation, poor thermal insulation performance and thermal shock resistance of the existing tin bath roof brick

Method used

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  • Low-thermal-conductivity mullite tin bath combined top cover brick

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Embodiment 1

[0022] The low thermal conductivity mullite tin bath combined roof brick of this embodiment is made of the following raw materials in mass percentage: 52% of high-purity mullite aggregate, 15% of pure calcium aluminate cement, 8% of high-purity silica powder, α-alumina fine powder 10%, high-purity mullite fine powder 12%, sillimanite 2.8%, sodium tripolyphosphate 0.2%.

[0023] Wherein, the raw material specifications are as follows: in the mullite aggregate, Al 2 o 3 The mass percentage content ≥ 48%, Fe 2 o 3 The mass percentage content of ≤0.6%, Na 2 O and K 2 The sum of the weight percentages of O ≤ 0.6%; the particle size of the mullite aggregate is 0.088-8mm, and the bulk density is 1.90g / cm 3 , Barrel pressure strength ≥ 80Mpa, apparent porosity 20%, average pore diameter D50 ≤ 50μm, mass percentage of mullite phase ≥ 55%. In the calcium aluminate cement, Al 2 o 3 The mass percentage content of ≥80%, Fe 2 o 3 The mass percentage content of calcium aluminate ce...

Embodiment 2

[0026] The low thermal conductivity mullite tin bath combined roof brick of this embodiment is made of the following raw materials in mass percentage: 55% of high-purity mullite aggregate, 9.9% of pure calcium aluminate cement, 10% of high-purity silica powder, α-alumina fine powder 18%, high-purity mullite fine powder 5%, andalusite 2.0%, sodium hexametaphosphate 0.1%.

[0027] Wherein, the raw material specifications are as in Example 1, the difference is that: the bulk density of the mullite aggregate is 1.95g / cm 3 , The apparent porosity is 15%.

[0028] The preparation method of the low thermal conductivity mullite tin bath combined top cover brick in this embodiment is as follows: the concave mold is used to form the formula ingredients, the mixture is made by adding water and stirred, the mold is poured and formed by vibration, after demoulding, the standard curing is performed, and then the mold is heated at 110 ° C. It is dried under the hood, and then fired at a hig...

Embodiment 3

[0030] The low thermal conductivity mullite tin bath combined roof brick of this embodiment is made of the following raw materials in mass percentage: 50% of high-purity mullite aggregate, 12% of pure calcium aluminate cement, 5% of high-purity silica powder, α-alumina fine powder 18%, high-purity mullite fine powder 12%, andalusite 1.0%, sillimanite 1.7%, sodium hexametaphosphate 0.3%.

[0031]Wherein, the raw material specifications are as in Example 1, except that the bulk density of the mullite aggregate is 2.0 g / cm3, and the apparent porosity is 15%.

[0032] The preparation method of the low thermal conductivity mullite tin bath combined top cover brick in this embodiment is as follows: the concave mold is composed of the formula ingredients, the mixture is made by adding water and stirred, the mold is poured and formed by vibration, after demoulding, it is maintained under natural conditions, and then Drying at 110°C, and then firing at a high temperature in a downdraft...

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Abstract

The invention discloses a low-thermal-conductivity mullite tin bath combined top cover brick prepared from the following raw materials by the mass percentage: 40.5%-65% of a mullite aggregate, 8%-15% of calcium aluminate cement, 4%-10% of a silica micropowder, 10%-18% of an alumina micropowder, 5%-13% of a mullite fine powder, 2%-3% of a mineralizing agent, and 0.1%-0.5% of a water reducing agent. The low-thermal-conductivity mullite tin bath combined top covering brick has the advantages of small thermal conductivity coefficient, small proportion, light weight, high strength, good thermal shock resistance, high refractoriness (greater than 1700 DEG C) and the like; the tin bath combined top cover brick is used in a top cover of a tin bath, greatly reduces the kiln body weight, and reduces the kiln body heat capacity while saving cost; the tin bath combined top cover brick has good thermal shock resistance, and has the service life of a kiln improved greatly; and the tin bath combined top cover brick has the advantages of small thermal conductivity coefficient, good thermal insulation effect and little heat loss, significantly improves the thermal utilization efficiency, saves energy, greatly reduces the energy consumption, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a low thermal conductivity mullite tin bath combined top cover brick. Background technique [0002] my country is the largest developing country in the world, and also the second largest energy producer and consumer in the world. However, my country's energy utilization efficiency is low, only about 35%, far below the level of developed countries. In order to achieve sustainable economic and social development, we must take the road of saving resources, and at the same time continuously improve energy utilization efficiency. [0003] Industrial kiln is the main energy-consuming equipment in industrial production, and its energy-saving problem is an important topic at present. Take the combined roof brick for the tin bath of the float glass production line as an example. The tin bath is the core thermal equipment for the production of float glass. The tin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C03B18/16
Inventor 刘常华郑银龙吕志乾
Owner HENAN ZHONGYUAN SPECIAL REFRACTORY
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