High-alumina structure heat-insulation integrated composite brick and preparation method

A composite brick and high-aluminum technology, which is applied in the field of high-aluminum structural and thermal insulation integrated composite bricks and its preparation, can solve the problems of increased heat dissipation of the kiln cylinder, increased temperature of the supporting rollers, increased heat consumption of clinker, etc. The effect of prolonging the service life of equipment, excellent anti-peeling performance and low thermal conductivity

Inactive Publication Date: 2010-10-20
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 ope

Method used

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  • High-alumina structure heat-insulation integrated composite brick and preparation method

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Experimental program
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Effect test

Embodiment 1

[0045] In this embodiment, the dense high-alumina bauxite heavy working layer and the layered composite of alumina hollow spheres are used. The raw materials and mass percentages of the heavy working layer are:

[0046] 3~5mm high bauxite 18%

[0047] 1~3mm high bauxite 33%

[0048] Less than 1mm high bauxite 25%

[0049] No more than 325 mesh high bauxite 18%

[0050] Clay 6%

[0051] Plus liquid binder 3%

[0052] Functional admixture 8%

[0053] The additional liquid binder is industrial wood sulfonate solution, and the functional additive is kyanite

[0054] The raw materials used in the light working layer and their mass percentages are: 65% of aluminum oxide hollow spheres, 35% of α-Al2O3 micropowder, and 35% of the mass percent of α-Al2O3 micropowder as a phosphoric acid binder.

[0055] The manufacturing method of the high-alumina structural heat insulation integrated composite brick comprises the following steps:

[0056] (1) Ingredients:

[0057] Heavy-duty w...

Embodiment 2

[0062] In this embodiment, the dense high-alumina bauxite heavy working layer and the layered composite of aluminum-magnesium hollow spheres are used. The raw materials and mass percentages of the heavy working layer are:

[0063] 3~5mm high bauxite 23%

[0064] 1~3mm high bauxite 30%

[0065] Less than 1mm high bauxite 21%

[0066] No more than 325 mesh high bauxite 24%

[0067] Clay 2%

[0068] Plus liquid binder 5%

[0069] Functional admixture 3%

[0070] The additional liquid binder is methyl cellulose solution, and the functional additive is zirconia

[0071] The raw materials used in the light working layer and their mass percentages are: 38% of aluminum-magnesium hollow spheres, 62% of high-bauxite powder, and 31% of the mass percentage of high-bauxite powder added with aluminum dihydrogen phosphate binder. %.

[0072] The manufacturing method of the high-alumina structural heat insulation integrated composite brick comprises the following steps:

[0073] (1) I...

Embodiment 3

[0079] In this embodiment, the dense high-alumina bauxite heavy working layer and corundum hollow spheres are used for lamellar compounding. The raw materials used in the heavy working layer and their mass percentages are:

[0080] 3~5mm high bauxite 20%

[0081] 1~3mm high bauxite 30%

[0082] Less than 1mm high bauxite 23%

[0083] No more than 325 mesh high bauxite 21%

[0084] Clay 6%

[0085] Plus liquid binder 4%

[0086] Functional admixture 5%

[0087] The added liquid binder is 4% yellow dextrin solution, and the functional additive is zirconium silicate

[0088] The raw materials used in the light working layer and their mass percentages are: 60% of corundum hollow balls, 40% of coke gemstone powder, and 35% of the mass percentage of coke gemstone powder plus aluminum sulfate binder.

[0089] The manufacturing method of the high-alumina structural heat insulation integrated composite brick comprises the following steps:

[0090] (1) Ingredients:

[0091] Heav...

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Abstract

The invention discloses a high-alumina structure heat-insulation integrated composite brick and a preparation method. The high-alumina structure heat-insulation integrated composite brick comprises a heavy working layer adopting compact bauxite chamotte as main raw material and a high-strength light heat-insulation layer adopting alumina hollow ball, aluminum-magnesium hollow ball, corundum hollow ball, hollow micro-sphere, light ceramic particle or the mixture of the above materials as a skeleton material, and is formed by compounding the heavy working layer and the light heat-insulation layer in a vibration pressurizing way or a mechanical formation way, and the length ratio of the heavy working layer and the light heat-insulation layer is 1 to 5: 2 to 1. The high-alumina structure heat-insulation integrated composite brick overcomes the weakness that the high-alumina brick for rotary kiln has large heat conduction coefficient or overcomes the weakness that the heat-insulation layer of the present high-alumina composite brick has low strength and is easy to break. The invention provides the structure heat-insulation integrated composite brick with good abrasion resistance, high refractoriness, good structural strength and good heat-preserving and heat-insulation performance.

Description

technical field [0001] The invention relates to a refractory composite brick and a preparation method thereof, in particular to a high-aluminum structural heat insulation 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. The rotary kiln is mainly composed of kiln shell, refractory bricks and transmission equipment. During the production process, the heat in the material is transferred to the kiln skin, refractory bricks and kiln shell through radiation and conduction, and the heat transferred to the kiln shell is then dissipated into the atmosphere through radiation and convection. Since the thermal conductivit...

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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