Heat-insulating integrated composite brick with alkaline structure and preparation method thereof

A composite brick and alkaline technology, which is applied in the field of alkaline structural heat insulation integrated composite brick and its preparation, can solve the problems of increased heat dissipation of the kiln shell, increased heat consumption of clinker, and increased temperature of the supporting wheel tiles, etc., to achieve extended The service life of equipment and the effect of energy saving

Inactive Publication Date: 2010-10-13
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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  • Heat-insulating integrated composite brick with alkaline structure and preparation method thereof
  • Heat-insulating integrated composite brick with alkaline structure and preparation method thereof
  • Heat-insulating integrated composite brick with alkaline structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this embodiment, a dense magnesia heavy working layer and an alumina hollow sphere light heat insulating layer are composited. The heavy working layer is made of fused magnesia or sintered magnesia as raw materials, and sulfite pulp waste liquid is used as a binder. Requires MgO% ≥ 80%. The raw materials used in the lightweight working layer and their mass percentages are: alumina hollow spheres 65%, α-Al 2 O 3 Micropowder 35%, additional phosphoric acid binder is α-Al 2 O 3 35% of the mass percentage of micropowder.

[0040] The preparation process includes the following steps:

[0041] (1) Batching: The batching process of the heavy working layer is to first mix the powder with no more than 325 mesh in proportion and mix it evenly in a ball mill, then add the mixed powder after the remaining aggregate particles and the binder are evenly mixed , Stirred for 10-30 minutes and then standby; the batching process of the lightweight heat insulation layer is to mix the alumin...

Embodiment 2

[0045] In this embodiment, a dense magnesia-chromium heavy working layer and an aluminum-magnesium hollow sphere light heat insulation layer are composited. The raw materials used in the heavy working layer are sintered magnesia or fused magnesia and refractory chrome ore. The agent is magnesium sulfate solution, requiring 55~80% MgO%, Cr 2 O 3 % Is 8-20%. The raw materials used in the light insulation layer and their mass percentage are: aluminum-magnesium hollow spheres 38%, α-Al 2 O 3 Micropowder 62%, additional aluminum dihydrogen phosphate binder is α-Al 2 O 3 31% of the mass percentage of micropowder.

[0046] The preparation process includes the following steps:

[0047] (1) Batching: The batching process of the heavy working layer is to first mix the powder with no more than 325 mesh in proportion and mix it evenly in a ball mill, then add the mixed powder after the remaining aggregate particles and the binder are evenly mixed , Stirring for 10-30 minutes, then standby; th...

Embodiment 3

[0051] In this embodiment, a dense dolomite heavy working layer and a corundum hollow ball light heat insulation layer are composited. The heavy working layer uses magnesium dolomite sand as the raw material, liquid paraffin is the binding agent, and the MgO% is required to be 30~ 42%, CaO% is 40-60%. The raw materials used in the lightweight working layer and their mass percentage content are: corundum hollow ball 60%, α-Al 2 O 3 Micropowder 40%, plus aluminum sulfate binder as α-Al 2 O 3 35% of the mass percentage of micropowder.

[0052] The preparation process includes the following steps:

[0053] (1) Batching: The batching process of the heavy working layer is to first mix the powder with no more than 325 mesh in proportion and mix it evenly in a ball mill, then add the mixed powder after the remaining aggregate particles and the binder are evenly mixed , Stirred for 10-30 minutes and then standby; the batching process of high-strength light insulation layer is to mix corund...

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Abstract

The invention discloses a heat-insulating integrated composite brick with an alkaline structure and a preparation method thereof, comprising a heavy-weight work layer and a light-weight heat-insulating layer, wherein the heavy-weight work layer takes compacted magnesium and compacted alkaline materials as the raw materials; the light-weight heat-insulating layer takes an alumina hollow ball or analuminum-magnesium hollow ball or a corundum hollow ball or the mixture of the three balls as the light-weight aggregate; the composite brick is composited by the heavy-weight work layer and the light-weight heat-insulating layer by vibration and pressurizing or mechanical-pressing moulding; and the proportion of the length dimension of the heavy-weight work layer and the light-weight heat-insulating layer is 1-5:2-1. The heat-insulating integrated composite brick overcomes the defect of big heat conductivity of the alkaline brick for a rotary kiln. The invention provides the heat-insulating integrated composite brick with good wear resistance, high refractoriness, good structural strength and good heat-preserving and heat-insulating performance.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 王家邦
Owner ZHEJIANG UNIV
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