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Light high-alumina insulating firebrick and preparation method thereof

A technology of lightweight thermal insulation and refractory bricks, applied in the field of lightweight thermal insulation refractory bricks, can solve the problems of low cost performance of products, high raw material cost, complex formula, etc., and achieve the effects of low thermal conductivity, simple method and good compatibility

Inactive Publication Date: 2010-07-07
郑州东方炉衬材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the formula of this product is relatively complicated, the cost of raw materials is high, the performance is average, and the cost performance of the product is low

Method used

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  • Light high-alumina insulating firebrick and preparation method thereof
  • Light high-alumina insulating firebrick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: High-alumina poly-light heat-insulating refractory bricks, the ratio of raw materials is shown in Table 2, and 60% of high-alumina bauxite clinker and 40% of binder kaolin are weighed by weight percentage. The above two raw materials are dry powder, and the particle size is uniform. 200-325 mesh, add the above raw materials into a forced mixer and mix evenly, and stir for 5-6 minutes; then add 0.5% polylight balls and 10% sawdust accounting for the total weight of the above raw materials, and stir for another 5-6 minutes, of which the sawdust Sieve with a 14-mesh sieve before use; add water in proportion and stir evenly, the weight ratio of the dry powder mixture to water is 1.75:1, and the stirring time is 5-6 minutes, stir into a slurry, and then inject it into the mold, cast into bricks;

[0029] The adobe is dried in two stages. The first stage is demoulding drying, the drying temperature is 40-60°C, and the drying time is 16-24h; the second stage is forc...

Embodiment 2

[0031] Example 2: High-alumina poly-polymer light-weight heat-insulating refractory bricks. The ratio of raw materials is shown in Table 2. High-alumina bauxite and binder are weighed by weight percentage. The particle size of the above two raw materials is 200-325 mesh. Add it into a forced mixer and mix evenly, and the stirring time is 5-6 minutes; then add polylight balls and sawdust in proportion, and stir for 5-6 minutes, and the sawdust is sieved with a 14-mesh screen before use; -6 minutes, the weight ratio of the dry powder mixture and water is 1.35:1, stir it into a flowing mud-like material, then inject it into the mold, and cast it into adobe;

[0032] The adobe is dried in two stages. The first stage is demoulding drying, the drying temperature is 40-50°C, and the drying time is 16-20h; the second stage is forced drying, the drying temperature is 90-100°C, and the drying time is 14 hours. ~ 16 hours, the moisture content of the dried bricks is controlled below 6%; ...

Embodiment 3

[0033] Embodiment 3: High-alumina poly-light heat-insulating refractory bricks, the ratio of raw materials is shown in Table 2, and high-alumina bauxite and binder are weighed by weight percentage, and the above-mentioned raw materials are added to a forced mixer, and mixed for 5-6 minutes; then Add polylight balls and sawdust in proportion, stir for 5-6 minutes; add water in proportion, the weight ratio of dry powder mixture and water is 1.35:1, then stir for 5-6 minutes, stir into a flowing slurry, and then inject it into the mold In, poured into adobe;

[0034] The adobe is dried in two stages. The first stage is demoulding drying, the drying temperature is 50-60°C, and the drying time is 16-18h; the second stage is forced drying, the drying temperature is 80-100°C, and the drying time is 12 hours. ~15 hours, the moisture content of the dried bricks is controlled below 6%; the dried bricks are put into the kiln, heated from room temperature to 1300-1350 ° C, kept for 6-7 ho...

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Abstract

The invention discloses a light high-alumina insulating firebrick and a preparation method thereof used for insulating layers of thermal equipment. The firebrick comprises the raw materials in percent by weight: 40% to 60% of high-alumina bauxite clinker and 40% to 60% of binder, polymeric light ball and sawdust respectively account 0.5% to 1.5% and10% to 15% of the total weight of the high-alumina bauxite clinker and the binder and are also added. The preparation method comprises the steps of: mixing the high-alumina bauxite clinker with the binder; then adding the polymeric light ball and the sawdust; adding water with the proportion of the dry mixed powder and the water of 1.0 to 1.75: 1; stirring into slurry-shaped materials; casting into brick blanks; drying; filling into a kiln; heating to 1270 DEG C to 1350 DEG C; and keeping the temperature for preparing the firebrick by burning. The firebrick has the advantages of simple formulation, easy acquirement of the raw materials, good compatibility, high compressive strength, low thermal conductivity, low change rate of high-temperature heavy firing line and the like, and achieves the national standards of relative products. The firebrick has simple preparation method and lower cost, can be used for the insulating layers and fireproof layers of all kinds of thermal equipment, and is beneficial to popularization and application.

Description

1. Technical field: [0001] The invention relates to a lightweight heat-insulating refractory brick, in particular to a high-aluminum lightweight heat-insulating refractory brick for thermal equipment heat insulation layer and a preparation method thereof. 2. Background technology: [0002] Energy is scarce in the world, and various thermal equipment are important facilities in industrial production, and they are also large energy consumers. Therefore, the refractory layer and heat insulation layer of various thermal equipment require heat preservation, fire resistance, and heat insulation. Long-term safe use, energy saving and consumption reduction guarantee greater economic benefits. At present, heat insulation and heat preservation refractory bricks of various materials are basically used: (1) add combustible materials, such as plant saw foam, poly light ball; (2) low density, low refractoriness light materials, such as expanded perlite, closed cell perlite. However, add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 张青永耿昌彬
Owner 郑州东方炉衬材料有限公司
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