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Non-burning aluminum magnesia calcium brick and preparation method thereof

A technology of aluminum-magnesium-calcium brick and aluminum-magnesium-calcium spinel, which is applied in the field of unfired aluminum-magnesium-calcium brick and its preparation, can solve the problems of shortage of refractory material resources and high production cost, and achieve lightweight, reduce production cost, and promote The effect of energy saving and emission reduction

Active Publication Date: 2014-11-26
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the shortage of resources of aluminum-magnesium system refractory materials, high production cost, theoretical density and discharge after use, the present invention provides an unfired aluminum-magnesium-calcium brick and its preparation method, which utilizes calcium sand with abundant resources and low theoretical density Replacing part of corundum to achieve "lightweight" refractory materials, promoting production cost reduction and lightweight refractory materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Grind corundum to a particle size of 0.5~8mm; crush aluminum-magnesium spinel and calcium sand to a particle size of 0.5~5mm; grind magnesia to a particle size of ≤0.5mm to make magnesia powder; prepare alumina with a particle size of ≤3μm Micropowder; prepare silicon powder with a particle size of ≤300 mesh as an antioxidant; prepare anhydrous resin with a fixed carbon content of 30% by weight;

[0030] According to the order of corundum, aluminum-magnesium spinel, calcium sand, magnesia powder, anhydrous resin, antioxidant and alumina micropowder, the materials are added to the sand mixer and mixed for 20 minutes to make a mixed material; each component The dosage by weight percentage is: 75% corundum, 10% aluminum-magnesium spinel, 2% calcium sand, 4% magnesia powder, 8% alumina micropowder, 1% antioxidant, plus 4% anhydrous resin ;

[0031] Compressing the mixed material under a pressure of 200MPa to obtain a billet;

[0032] The billet is heat-treated at 200°C fo...

Embodiment 2

[0035] Grind corundum to a particle size of 0.5~8mm; crush aluminum-magnesium spinel and calcium sand to a particle size of 0.5~5mm; grind magnesia to a particle size of ≤0.5mm to make magnesia powder; prepare alumina with a particle size of ≤3μm Micropowder; prepare silicon powder with a particle size of ≤300 mesh as an antioxidant; prepare anhydrous resin with a fixed carbon content of 35% by weight;

[0036] According to the order of corundum, aluminum-magnesium spinel, calcium sand, magnesia powder, anhydrous resin, antioxidant and alumina micropowder, the materials are added to the sand mixer and mixed for 30 minutes to make a mixed material; each component The dosage by weight percentage is: corundum 71%, aluminum-magnesium spinel 10%, calcium sand 5%, magnesia powder 4%, alumina micropowder 8%, antioxidant 2%, plus 4% anhydrous resin;

[0037] Compressing the mixed material under a pressure of 200MPa to obtain a billet;

[0038] The billet is heat-treated at 200°C for...

Embodiment 3

[0041] Grind corundum to a particle size of 0.5~8mm; crush aluminum-magnesium spinel and calcium sand to a particle size of 0.5~5mm; grind magnesia to a particle size of ≤0.5mm to make magnesia powder; prepare alumina with a particle size of ≤3μm Micropowder; prepare silicon powder with particle size≤300 mesh as antioxidant; prepare anhydrous resin, whose weight content of fixed carbon is 40%;

[0042] According to the order of corundum, aluminum-magnesium spinel, calcium sand, magnesia powder, anhydrous resin, antioxidant and alumina micropowder, the materials are added to the sand mixer and mixed for 25 minutes to make a mixed material; each component The dosage by weight percentage is: corundum 66%, aluminum-magnesium spinel 10%, calcium sand 10%, magnesia powder 4%, alumina micropowder 8%, antioxidant 2%, plus 4% anhydrous resin;

[0043] Compressing the mixed material under a pressure of 200MPa to obtain a billet;

[0044] The billet is heat-treated at 200°C for 24 hour...

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Abstract

The invention provides a non-burning aluminum magnesia calcium brick and a preparation method thereof, and belongs to the technical field of refractory materials. The non-burning aluminum magnesia calcium brick comprises: by weight, 55-75% of corundum, 10-30% of aluminum magnesium spinel, 2-10% of calcium sand, 2-5% of magnesia powder, 5-10% alumina micro powder, 0-2% of an antioxidant, and carbon accounting for 0.9-2% of a total weight of the corundum, the aluminum magnesium spinel, the calcium sand, the magnesia powder, the alumina micro powder and the antioxidant. The preparation method comprises the following steps: (1) crushing the corundum to the particle size of 0.5-8 mm, respectively crushing the aluminum magnesium spinel and the calcium sand to the particle size of 0.5-5 mm; finely grinding magnesia to the particle size of equal or less than 0.5mm to make the magnesia powder, selecting the alumina micro powder with the particle size of equal or less than 3 mum, selecting silica powder with the particle size of equal or less than 300 mesh and / or B4C powder, as the antioxidant, and preparing anhydrous resin; (2) mixing evenly to obtain a mixed material; (3) obtaining a preform body by compression moulding under the pressure of 200-250 MPa; and (4) at the temperature of 150-250 DEG C, carrying out heat treatment for 12-32 hours. According to the non-burning aluminum magnesia calcium brick and the preparation method thereof, the corundum is partly replaced by the calcium sand which is wide in resources and low in density, so that the production cost is reduced, lightweight of the refractory materialscan be realized, thermal storage loss is reduced, and energy saving and emission reduction can be promoted.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an unfired aluminum-magnesium-calcium brick and a preparation method thereof. Background technique [0002] Aluminum-magnesium refractories are widely used in the metallurgical field due to their good high temperature resistance, thermal shock resistance and slag erosion resistance. However, due to the continuous rise in the price of corundum raw materials used in recent years, the production cost and price It also increased year by year. On the other hand, due to the high true density of corundum, the volume density of the aluminum-magnesium refractory material is relatively large, which increases the weight of the refractory material, and the heat storage loss of the refractory material is large, and the discharge of the refractory material after use also increases accordingly. Contents of the invention [0003] Aiming at the shortage of resources of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 陈敏徐磊王楠
Owner NORTHEASTERN UNIV LIAONING
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