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Magnesium-hercynite-structured heat-insulating integral composite brick and preparation method thereof

A magnesia-iron-aluminum spinel and composite brick technology, which is applied in the field of magnesia-iron-aluminum spinel structural heat insulation integrated composite bricks and its preparation, can solve the problem of thermal expansion of a cylinder body, increase of heat consumption of clinker, and kiln cylinder. It can solve the problems of increased heat dissipation and other problems, and achieve the effects of good thermal insulation performance, good structural strength and good wear resistance.

Inactive Publication Date: 2012-04-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature of the outer wall of the cylinder is high. On the one hand, it increases the heat dissipation of the kiln cylinder, thereby increasing the heat consumption of the clinker and causing an increase in the unit cost of the clinker; High, especially in the later period of use or in summer, it will bring great hidden dangers to the normal operation of the equipment
The overheating of the carcass increases the damage probability of mechanical equipment and accelerates the deformation of the cylinder, and the deformation of the cylinder accelerates the mechanical damage of the inner lining. The result is brick falling and kiln shutdown, which affects the operation rate of the cement rotary kiln

Method used

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  • Magnesium-hercynite-structured heat-insulating integral composite brick and preparation method thereof
  • Magnesium-hercynite-structured heat-insulating integral composite brick and preparation method thereof
  • Magnesium-hercynite-structured heat-insulating integral composite brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this example, the heavy working layer 1 adopts DMS98 type fused magnesia and ferroaluminum spinel as raw materials, and the particle gradation and its mass percentage are as follows:

[0036]

[0037] According to the above ratio, the mass percentage of the MgO component in the heavy working layer is 96%, and the Al 2 o 3 Ingredient mass percentage is 2%, Fe 2 o 3 The composition mass percentage is 2%.

[0038] The raw materials used in the lightweight heat insulation layer 2 and their mass percentages are: 10% aluminum oxide hollow spheres, 10% magnesium aluminum hollow spheres, 10% corundum hollow spheres, 10% chromium corundum hollow spheres, and zirconium corundum hollow spheres. Ball 15%, 325 mesh fused spinel micropowder 45%, additional industrial lignosulfonate solution 6%, Al 2o 3 The mass percentage is 98%, Al in magnesium aluminum hollow sphere 2 o 3 The mass percentage content is 99.9%, the mass percentage content of MgO is 0.1%, and the Al in co...

Embodiment 2

[0046] MS97A type sintered magnesia, α-Al 2 o 3 Powder and iron-aluminum spinel are used as raw materials, and the particle size distribution and its mass percentage are as follows:

[0047]

[0048]

[0049] According to the above ratio, the mass percentage of the MgO component of the heavy working layer is 85%, and the Al 2 o 3 The mass percentage of ingredients is 6.5%, Fe 2 o 3 The composition mass percentage is 7.5%.

[0050] The raw materials and their mass percentages used in the lightweight insulation layer 2 are: 65% of magnesium-aluminum hollow spheres, 35% of 325-mesh sintered spinel micropowder, 10% of lignosulfonate solution, and the magnesium-aluminum hollow spheres used Middle Al 2 o 3 The mass percent content is 70.5%, and the MgO mass percent content is 28.0%.

[0051] The manufacturing method of the magnesium-iron-aluminum spinel structure / heat insulation integrated composite brick of this embodiment includes the following steps:

[0052] (1) I...

Embodiment 3

[0058] The MS98A type sintered magnesia and ferroaluminum spinel used in the heavy working layer 1 of this example are raw materials, and the particle gradation and its mass percentage are as follows:

[0059]

[0060]

[0061] According to the above ratio, the mass percentage of the MgO composition of the heavy working layer obtained is 91%, and the Al 2 o 3 The mass percentage of ingredients is 3%, Fe 2 o 3 The composition mass percentage is 3.5%.

[0062] The raw materials and their mass percentages used in the lightweight heat insulation layer 2 are: 55% of magnesium-aluminum hollow spheres, 45% of 325-mesh fused spinel, 6% of methyl cellulose solution, and the magnesium-aluminum used Al in hollow sphere 2 o 3 The mass percentage is 50%, and the MgO mass percentage is 45%.

[0063] The manufacturing method of the magnesium-iron-aluminum spinel structure / heat insulation integrated composite brick of the present embodiment includes the following steps:

[0064] ...

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Abstract

The invention relates to a magnesium-hercynite-structured heat-insulating integral composite brick. The composite brick comprises a magnesium-hercynite heavy working layer and a light heat-insulating layer prepared from a light aggregate and powder. The integral composite brick is prepared from composed materials of the heavy working layer and the light heat-insulating layer. The length dimensional ratio of the heavy working layer to the light heat-insulating layer is 1-5:3-1. The invention also relates to a preparation method of the magnesium-hercynite-structured heat-insulating integral composite brick. According to the invention, the heavy layer and the light layer are combined, such that the thermal capacity can be reduced, creep deformation can be overcome, and the service life can be prolonged.

Description

technical field [0001] The invention relates to a refractory composite brick and a preparation method thereof, in particular to a magnesium-iron-aluminum-spinel structural heat-insulating integrated composite brick and a preparation method thereof. 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 are of 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 inverted kilns, they can meet the requirements when used together. ; But on some relatively moving equipment, such as a rotary kiln, it is difficult to me...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 王家邦
Owner ZHEJIANG UNIV
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