Magnesia-alumina spinel structure heat insulation integral composite brick and preparation method thereof

A technology of magnesia-aluminum spinel and composite bricks, which is applied in the field of refractory composite bricks and its preparation, can solve the problems of high thermal conductivity, low refractoriness, and low strength, and achieve the effects of prolonging the service life of equipment and saving energy consumption

Active Publication Date: 2010-10-20
浙江盛旺耐火材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the high thermal conductivity of the existing magnesia-alumina bricks used in rotary kilns, the purpose of the present invention is to provide a magnesia-alumina spinel structure heat insulation integrated composite brick and its preparation method, which uses a combination of heavy and light weight to reduce the Thermal conductivity, at the same time to overcome the shortcomings of low strength and low refractoriness of existing composite bricks

Method used

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  • Magnesia-alumina spinel structure heat insulation integral composite brick and preparation method thereof
  • Magnesia-alumina spinel structure heat insulation integral composite brick and preparation method thereof
  • Magnesia-alumina spinel structure heat insulation integral composite brick and preparation method thereof

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Embodiment 1

[0032] This embodiment adopts dense magnesia-aluminum refractory material and aluminum oxide hollow sphere layered composite, the raw materials and mass percentages used in the heavy working layer are: 1-3mm fused magnesia 35%, less than 1mm fused magnesia Magnesia 25%, no more than 325 mesh fused magnesia 20%, less than 1mm fused spinel 15%, no more than 325 mesh fused spinel 5%, plus 3% sulfurous acid pulp waste liquid; light work The raw materials used in the layer and their mass percentages are: 65% aluminum oxide hollow spheres, α-Al 2 o 3 Micropowder 35%, plus phosphate binder as α-Al 2 o 3 35% of the mass percentage of fine powder.

[0033] The preparation process comprises the following steps:

[0034] (1) Batching: The batching process of the heavy working layer is to mix the powder not larger than 325 mesh in proportion and mix it evenly in the ball mill, and then add the mixed powder after the rest of the aggregate particles and the binder are mixed evenly , st...

Embodiment 2

[0038]This embodiment is made of dense magnesium-aluminum refractory materials and aluminum-magnesium hollow spheres. The raw materials used in the heavy working layer and their mass percentages are: 1-3mm fused magnesia 45%, less than 1mm fused magnesia Magnesia 15%, no more than 325 mesh fused magnesia 15%, less than 1mm fused spinel 10%, no more than 325 mesh fused spinel 15%, plus 5% yellow dextrin solution; light heat insulation The raw materials used in the layer and their mass percentages are: 38% aluminum-magnesium hollow spheres, α-Al 2 o 3 Micropowder 62%, plus aluminum dihydrogen phosphate binder as α-Al 2 o 3 31% of the mass percentage of fine powder.

[0039] The preparation process comprises the following steps:

[0040] (1) Batching: The batching process of the heavy working layer is to mix the powder not larger than 325 mesh in proportion and mix it evenly in the ball mill, and then add the mixed powder after the rest of the aggregate particles and the bind...

Embodiment 3

[0044] This embodiment is made of dense magnesium-aluminum refractory material and corundum hollow sphere layered compound. The raw materials and their mass percentages used in the heavy working layer are: 1-3mm fused magnesia 45%, less than 1mm fused magnesia Sand 15%, no more than 325 mesh fused magnesia 25%, less than 1mm fused spinel 5%, no more than 325 mesh fused spinel 10%, plus lignosulfonate 3%; used in light working layer The raw materials and their mass percentages are: corundum hollow spheres 60%, α-Al 2 o 3 40% fine powder, plus aluminum sulfate binder as α-Al 2 o 3 35% of the mass percentage of fine powder.

[0045] The preparation process comprises the following steps:

[0046] (1) Batching: The batching process of the heavy working layer is to mix the powder not larger than 325 mesh in proportion and mix it evenly in the ball mill, and then add the mixed powder after the rest of the aggregate particles and the binder are mixed evenly , stirred for 10 to 30...

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Abstract

The invention discloses a magnesia-alumina spinel structure heat insulation integral composite brick and a preparation method thereof. The heat insulation integral composite brick comprises a heavy work layer and a light heat insulation layer, wherein the heavy work layer is made of compact magnesia-alumina spinel, the light heat insulation layer is made of light aggregate of alumina hollow ballsor magnesia-alumina hollow balls or corundum hollow balls or a mixture of the alumina hollow balls, the magnesia-alumina hollow balls and the corundum hollow balls, the heat insulation integral composite brick is formed through vibration compression or mechanical compression, and the length size proportion of the heavy work layer and the light heat insulation layer is 1 to 5/2 to 1. The inventionovercomes the defect of high heat conduction coefficient of magnesia-alumina spinel bricks used for a rotary kiln, and provides the magnesia-alumina spinel structure heat insulation integral composite brick with the advantages of good wear resistance performance, high refractoriness, high structural intensity and excellent heat insulation and thermal isolation performance.

Description

technical field [0001] The invention relates to a refractory composite brick and a preparation method, in particular to a composite brick with a magnesia-aluminum spinel structure and heat insulation integration and a preparation method. Background technique [0002] With the continuous emergence of new technologies for cement production, the main equipment of cement production is developing in the direction of large-scale, increasing production, improving quality, saving energy, reducing consumption, and reducing costs have become the key to increasing efficiency in production management. Most of the existing refractory bricks and heat insulation bricks have a single structure, and bricks with various properties need to be used together. If they are used on relatively fixed equipment, such as tunnel kilns and downdraft kilns, they can meet the requirements when used together. ; But on some relatively moving equipment, such as a rotary kiln, it is difficult to meet the requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王家邦王立旺
Owner 浙江盛旺耐火材料股份有限公司
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