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Mullite light heat-insulation fire-resistant brick and production method thereof

A light heat insulation and production method technology, applied in the direction of ceramic molding machines, manufacturing tools, etc., can solve the problems of low product cost performance, general product performance, high raw material cost, etc., achieve low thermal conductivity, good drying effect, and reasonable proportioning Effect

Active Publication Date: 2015-10-14
郑州东方炉衬材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of raw materials for this product is relatively high, and the raw materials such as calcined alumina used are high-energy-consuming and high-value raw materials, which are not economical to use in the production of heat-insulating bricks. The product performance is average and the product's cost performance is low.

Method used

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  • Mullite light heat-insulation fire-resistant brick and production method thereof
  • Mullite light heat-insulation fire-resistant brick and production method thereof
  • Mullite light heat-insulation fire-resistant brick and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The adobe drying is carried out in two stages, the first stage is low-temperature drying, the drying temperature is 20-35°C, and the drying time is 24-36h; the second stage is forced drying, the drying temperature is 90-110°C, and the drying time is 24 hours. ~36h, the moisture content of the adobe after drying is controlled below 5%. When the bricks are dried, the honeycomb aluminum alloy drying pallet is used. The aluminum alloy plate has ventilation and drainage holes, and the aluminum alloy plate is covered with a cotton cloth layer. The aluminum alloy plate and the cotton cloth layer are bonded by adhesive.

[0042] The firing temperature system for heating the adobe from room temperature is as follows: the adobe is heated from room temperature to 700-750°C for 8-10 hours, and kept for 1-1.5 hours; Rise to 1250-1300°C in ~6 hours, keep warm for 1-1.5h; heat up to 1350-1400°C in 2-3 hours, keep hold for 2-3 hours; then start to cool down, from 1350-1400°C to 1100-11...

Embodiment 2

[0045] Add the above raw materials into the forced mixer according to the ratio, mix and stir; add expandable polystyrene balls and sawdust, and stir for 5-6 minutes; add water in proportion, the weight ratio of basic raw materials and water is 1.0:1, and it is made by stirring The flowing mud-like material is stirred for 5-6 minutes; then poured into the mold and cast into adobe, the adobe is dried, and then loaded into a kiln; heated from room temperature to 1350°C, kept for 2 hours, and fired.

[0046] The adobe drying is carried out in two stages, the first stage is low-temperature drying, the drying temperature is 20°C, and the drying time is 36h; the second stage is forced drying, the drying temperature is 9°C, the drying time is 6h, and the moisture content of the adobe after drying is controlled at 5 %the following. When drying bricks, use honeycomb aluminum alloy drying pallets, in which the aluminum alloy board has ventilation drainage holes, and the aluminum alloy b...

Embodiment 3

[0050] Add the above raw materials into the forced mixer according to the proportion, mix and stir; add expandable polystyrene balls and sawdust, and stir for 5-6 minutes; add water according to the proportion, the weight ratio of basic raw materials and water is 1.75:1, and it is made by stirring The flowing mud-like material is stirred for 5-6 minutes; then poured into the mold and cast into bricks, dried and then loaded into the kiln; heated from room temperature to 1400°C, kept for 3 hours, and fired.

[0051] The adobe drying is carried out in two stages, the first stage is low-temperature drying, the drying temperature is 35°C, and the drying time is 24h; the second stage is forced drying, the drying temperature is 110°C, the drying time is 24h, and the water quality of the adobe after drying The content is controlled below 5%. When drying bricks, use honeycomb aluminum alloy drying pallets, in which the aluminum alloy board has ventilation drainage holes, and the alumin...

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Abstract

The invention relates to a mullite light heat-insulation fire-resistant brick and production method thereof. The fire-resistant brick includes following raw materials: 25-35% of aluminium hydroxide, 10-30% of flint clay clinker, 10-30% of kyanite, 35-50% of a bonding agent. With the raw materials, 1.0-2.0 m<3> of expandable polystyrene and 0.3-0.5 m<3> of sawdust are added. The bonding agent is kaolin or aluminum oxide cement. The fire-resistant brick is high in pressure resistance strength, is low in heat conductive coefficient, is low in change rate of a high-temperature re-burning curve and is good in thermal shock resistance, is excellent in performance and can reach the requirement of the standard of related products in American ASTM. By means of aluminium hydroxide for replacing aluminum oxide, the production method is low in energy consumption and cost, can generate more mullite crystal phases, can effectively reduce the content of a corundum phase in the product, and can increase the thermal shock resistance. The fire-resistant brick can be used in a heat insulation layer and a fireproof layer in all thermal equipment, achieves both energy-saving and fireproofing effects and is beneficial to popularization.

Description

technical field [0001] The invention relates to a lightweight heat-insulating refractory brick, in particular to a mullite light-weight heat-insulating refractory brick for thermal equipment and a production method thereof. Background technique [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) adding combustible materials, such as sawdust, poly light balls; (2) low density, low refractoriness lightweight materials, such as expanded perlite and closed cell perlite. However, adding a large amount of low-density...

Claims

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Application Information

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IPC IPC(8): C04B35/66B28B7/00
Inventor 耿昌彬张青永
Owner 郑州东方炉衬材料有限公司
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