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Alumina spinel brick and its preparation method

A technology of aluminum spinel and fused spinel, applied in the field of refractory materials, can solve problems affecting the operation quality and life of equipment lining, secondary pollution of refractory material structure, brick composition and mineral phase change, etc., to achieve good results Thermal shock resistance, high refractoriness, low spalling resistance

Active Publication Date: 2012-09-12
江苏耐基炉衬有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of environmental protection, chromium oxide refractory materials are easily reduced in a reducing atmosphere, resulting in secondary pollution and damage to the structure of refractory materials.
The destruction of the structure of the refractory material weakens the strength of the material. At the same time, the destruction of the brick structure accelerates the erosion and penetration of the brick, which causes the change of the composition and mineral phase of the brick, causes the structure of the brick to peel off, and seriously affects the operation quality and life of the equipment lining.

Method used

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  • Alumina spinel brick and its preparation method
  • Alumina spinel brick and its preparation method
  • Alumina spinel brick and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Get the following components in parts by weight:

[0035]

[0036] Wherein, the preparation method comprises the following steps:

[0037] (a) Premixing 13 parts of fused white corundum fine powder <0.088mm, 15 parts of fused spinel mixed powder and 10 parts of composite binder;

[0038] (b) 8 parts of high-alumina corundum particles of 3-5 mm, 35 parts of high-alumina corundum particles of 1-3 mm, 19 parts of fused white corundum particles of ≤1 mm, 4.5 parts of water and the pre-mixed materials in step (a) mixing;

[0039] (c) Send the mixed material in step (b) into a 4000KN friction brick press for pressing and forming, and the bulk density of the semi-finished product is 3.0-3.05g / cm -3 ;

[0040] (d) baking the adobe formed in step (c) at 60° C. for 48 hours until the residual moisture of the adobe is below 2%;

[0041] (e) Calcining the adobe obtained in step (d) at 1550-1580° C. for 5 hours to obtain the desired finished aluminum spinel brick.

[0042] W...

Embodiment 2

[0045] Get the following components in parts by weight:

[0046]

[0047] Wherein, the preparation method comprises the following steps:

[0048] (a) Premixing 12 parts of fused white corundum fine powder <0.088mm, 17 parts of fused spinel mixed powder and 12 parts of composite binder;

[0049] (b) 9 parts of high-alumina corundum particles of 3-5 mm, 33 parts of high-alumina corundum particles of 1-3 mm, 17 parts of fused white corundum particles of ≤1 mm, 5.2 parts of water and the pre-mixed materials in step (a) mixing;

[0050] (c) Send the mixed material in step (b) into a 4000KN friction brick press for pressing and forming, and the bulk density of the semi-finished product is 3.05~3.1g / cm -3 ;

[0051] (d) baking the adobe formed in step (c) at 80° C. for 40 hours until the residual moisture of the adobe is below 2%;

[0052] (e) Calcining the adobe obtained in step (d) at 1550-1580° C. for 4.5 hours to obtain the desired finished aluminum spinel brick.

[0053]...

Embodiment 3

[0056] Get the following components in parts by weight:

[0057]

[0058] Wherein, the preparation method comprises the following steps:

[0059] (a) Premix 11 parts of fused white corundum fine powder <0.088mm, 16 parts of fused spinel mixed powder and 11 parts of composite binder;

[0060] (b) 12 parts of high-alumina corundum particles of 3-5 mm, 30 parts of high-alumina corundum particles of 1-3 mm, 20 parts of fused white corundum particles of ≤1 mm, 5 parts of water and the pre-mixed materials in step (a) mixing;

[0061](c) Send the mixed material in step (b) into a 4000KN friction brick press for pressing and forming, and the bulk density of the semi-finished product is 3.05~3.1g / cm -3 ;

[0062] (d) baking the adobe formed in step (c) at 90° C. for 36 hours until the residual moisture of the adobe is below 2%;

[0063] (e) Calcining the adobe obtained in step (d) at 1550-1580° C. for 4.5 hours to obtain the desired finished aluminum spinel brick.

[0064] Wher...

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Abstract

The invention discloses an alumina spinel brick, which comprises the following components of: by weight, 8-12 parts of high-purity brown fused alumina particles of 3-5mm, 30-35 parts of high-purity brown fused alumina particles of 1-3mm, 15-20 parts of fused white corundum particles of less than or equal to 1mm, 10-13 parts of fused white corundum fine powder, 15-18 parts of fused spinel mixed fine powder, 10-12 parts of a composite binder and 4.5-5.4 parts of water. The invention also discloses a preparation method of the above alumina spinel brick. The alumina spinel brick provided by the invention has high refractoriness and high temperature flexural strength, and simultaneously has excellent characteristics such as good thermal shock resistance, corrosion resistance, penetration resistance, anti-stripping performance, low linear change rate and the like, and is especially suitable for petrochemical industrial waste liquid, exhaust gas incinerator, rotary kiln industrial waste incinerator and fusion incinerator inner liner. The manufacturing process is simple and easy to realize.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to an aluminum spinel brick and a preparation method thereof. Background technique [0002] The development of waste incineration treatment for the purpose of volume reduction of municipal garbage and industrial waste, and the molten slag treatment of incineration ash for the purpose of more volume reduction and harmlessness. There are many types of waste incinerators and melting furnaces, but the refractory materials involved are mainly chromium oxide refractory materials and non-oxide refractory materials. At present, domestic petrochemical industry waste liquid and waste gas are also treated by incineration. Due to the complex composition of petrochemical industry waste liquid and waste gas, refractory materials for incinerators are similar. From the perspective of environmental protection, chromium oxide refractory materials are easily reduced in a reducing atmos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/106C04B35/622
Inventor 毛荣新毛慧毛俊良毛荣棠
Owner 江苏耐基炉衬有限公司
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