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Low-heat-conduction multi-layer mullite brick and preparation method thereof

A multi-layer composite, mullite brick technology, applied in lighting and heating equipment, furnace components, furnace types, etc., to achieve significant energy saving and consumption reduction, lower cylinder surface temperature, and improve thermal shock stability

Active Publication Date: 2015-01-07
郑州瑞泰耐火科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, to provide a low thermal conductivity multilayer composite mullite brick and its preparation method, the low thermal conductivity multilayer composite mullite brick is used to replace the existing silica mollite brick, To solve the problem of using brick lining in the upper and lower transition of cement kiln

Method used

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  • Low-heat-conduction multi-layer mullite brick and preparation method thereof
  • Low-heat-conduction multi-layer mullite brick and preparation method thereof
  • Low-heat-conduction multi-layer mullite brick and preparation method thereof

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Embodiment 1

[0022] Such as Figure 1-2 Shown, a kind of low thermal conductivity multi-layer composite mullite brick, it comprises working layer 1, heat insulating layer 2 and heat insulating layer 3, described working layer 1 and heat insulating layer 2 are connected, on heat insulating layer 2 there is A gap, the heat insulation layer 3 is located in the gap; the working layer 1 is made of aggregate, powder and antioxidant plus a new type of binder according to the following proportions by weight: 55 parts of aggregate, of which the particle size is 0-1mm 10 parts of sintered mullite, 20 parts of sintered mullite with a particle size of 1-3 mm, 25 parts of sintered mullite with a particle size of 3-5 mm, the mass percentage of the chemical composition of the sintered mullite is: mullite phase 80-90% , Fe 2 o 3 2 O+Na 2 O97%, 3 parts of antioxidant , the antioxidant is metal aluminum powder and metal silicon powder mixed evenly in a weight ratio of 1 to 2:1, the average particle size...

Embodiment 2

[0033] Such as Figure 1-2 Shown, a kind of low thermal conductivity multi-layer composite mullite brick, it comprises working layer 1, heat insulating layer 2 and heat insulating layer 3, described working layer 1 and heat insulating layer 2 are connected, on heat insulating layer 2 there is A gap, the heat insulation layer 3 is located in the gap; the working layer 1 is made of aggregate, powder and antioxidant plus a new type of binder according to the following proportions by weight: 55 parts of aggregate, of which the particle size is 0-1mm 15 parts of sintered mullite, 20 parts of sintered mullite with a particle size of 1-3 mm, 20 parts of sintered mullite with a particle size of 3-5 mm, the mass percentage of the chemical composition of the sintered mullite is: mullite phase 80-90% , Fe 2 o 3 2 O+Na 2 O97%, 5 parts of antioxidant , the antioxidant is metal aluminum powder and metal silicon powder mixed evenly in a weight ratio of 1 to 2:1, the average particle size...

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Abstract

The invention discloses a low-heat-conduction multi-layer mullite brick and a preparation method thereof. Mullite with low heat conduction coefficient is utilized as a main raw material, a small amount of silicon carbide is added, a novel binding agent is utilized to replace clay, and a multi-layer composite structure is adopted. The heat conduction coefficient of a product is far lower than that of like products, thermal shock resistance and corrosion resistance of the product are greatly improved by means of excellent high temperature performance of the mullite, the service life of the product is prolonged, and simultaneously the energy-saving and consumption-reducing effect is obvious.

Description

technical field [0001] The invention relates to the technical field of refractory and environment-friendly materials, in particular to a low thermal conductivity multilayer composite mullite brick and a preparation method thereof. Background technique [0002] The upper and lower transition zones of the new dry-process cement rotary kiln are adjacent to the firing zone, and are often subjected to a harsher operating environment than the firing zone. Bricks are lining bricks. [0003] At present, most of the silica bricks sold in the market use first-grade or super-grade bauxite, and some companies also add fused corundum to improve the high-temperature performance and corrosion resistance of the product, but this also increases the thermal conductivity of silica bricks. The increase of the height makes the heat loss in the cement kiln faster, the fuel consumption per ton of cement increases, and the cylinder temperature rises, which easily deforms the cylinder and shortens ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B7/28F27D1/06C04B35/66C04B35/185C04B38/06
Inventor 郑建立李全有赵洪亮万远翔李沅锦
Owner 郑州瑞泰耐火科技有限公司
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