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Magnesium-aluminum refractory material and preparation method therefor

A refractory, aluminum technology, applied in the field of refractories, can solve the problems of less variety, large waste, high consumption, low service life, etc., and achieve the effect of reducing porosity, improving strength and thermal shock resistance, and high refractoriness

Inactive Publication Date: 2015-11-11
长兴泓矿炉料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a magnesium aluminum with high refractoriness, excellent corrosion resistance, good thermal shock resistance and wide sintering temperature range in order to solve the defects of low service life, high consumption and large waste of varieties of existing refractory materials quality refractories

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The mass fraction content of each raw material of magnesia-aluminum refractories is: 60 parts of magnesia-alumina spinel of 0.35-0.88mm, 35 parts of magnesia-alumina spinel of 0.012-0.3mm, and 0.0125-1μm of magnesia-alumina spinel 30 parts, 10 parts of magnesium aluminum spinel of 1.75-10nm, 5 parts of auxiliary additives, 1 part of nano-magnesia, 5 parts of boron carbide, 3 parts of binder and 2 parts of nano-alumina.

[0027] A preparation method of magnesium-aluminum refractory materials, each raw material is weighed according to the above ratio, mixed, formed, and cured to obtain a green body, dried at 234°C for 12 hours, fired at 1700°C, and then lowered to 1200°C Insulate for 2 hours, continue to cool down to 600°C for 3.5 hours, then cool down to 240°C for 6 hours, and then cool down to room temperature to obtain a magnesium-aluminum refractory material.

Embodiment 2

[0029] The mass fraction content of each raw material of magnesia-aluminum refractories is: 70 parts of magnesia-alumina spinel of 0.35-0.88mm, 40 parts of magnesia-alumina spinel of 0.012-0.3mm, and magnesia-alumina spinel of 0.0125-1μm 32 parts, 13 parts of magnesium aluminum spinel of 1.75-10nm, 7 parts of auxiliary additives, 3 parts of nano-magnesia, 8 parts of boron carbide, 5 parts of binder and 4 parts of nano-alumina.

[0030] A preparation method of magnesia-aluminum refractory material, each raw material is weighed according to the above ratio, mixed, formed, and cured to obtain a green body, dried at 243°C for 14 hours, fired at 1800°C, and then lowered to 1250°C Keep warm for 2 hours, continue to cool down to 750°C and keep warm for 3.5h, then cool down to 255°C and keep warm for 6h, then cool down to room temperature and test to obtain a magnesium-aluminum refractory material.

Embodiment 3

[0032] The mass fraction content of each raw material of magnesia-aluminum refractories is: 75 parts of magnesia-alumina spinel of 0.35-0.88mm, 45 parts of magnesia-alumina spinel of 0.012-0.3mm, and magnesia-alumina spinel of 0.0125-1μm 35 parts, 15 parts of magnesium aluminum spinel of 1.75-10nm, 9 parts of auxiliary additives, 4 parts of nano-magnesia, 10 parts of boron carbide, 7 parts of binder and 6 parts of nano-alumina.

[0033] A preparation method of magnesia-aluminum refractory material, each raw material is weighed according to the above ratio, mixed, formed, and cured to obtain a green body, dried at 256°C for 16 hours, fired at 1850°C, and then lowered to 1350°C Keep warm for 2 hours, continue to cool down to 850°C and keep warm for 3.5h, then cool down to 280°C and keep warm for 6 hours, then cool down to room temperature for detection to obtain a magnesium-aluminum refractory material.

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Abstract

The present invention relates to a magnesium-aluminum refractory material. The magnesium-aluminum refractory material is prepared by using magnesium aluminate spinel of different particle sizes as a raw material, and adding an auxiliary additive, nanometer magnesia, boron carbide, a binder and nanometer aluminium oxide. According to the product provided by the present invention, the organization structure is more uniform, and therefore strength and thermal shock resistance of the product are improved; the particle size of nano-zinc oxide is small, and therefore micro pores can be filled with the nano-zinc oxide, porosity of the product is reduced, and volume density is increased; and refractoriness is high, corrosion resistance is excellent, thermal shock resistance is good, and the sintering temperature range is wide.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a magnesium-aluminum refractory material with high refractoriness, excellent corrosion resistance, good thermal shock resistance and wide sintering temperature range and a preparation method thereof. Background technique [0002] With the increasing shortage of energy, countries are paying more and more attention to the development, production and use of high-temperature industrial energy-saving materials. High-temperature kilns need to use a large number of refractory materials with excellent performance or special properties. For example, in order to prolong the service life and improve the heat exchange capacity, the glass kiln regenerator needs to have excellent corrosion resistance, creep resistance and lattice body with special shape and size. In addition, the upper structure of the oxy-fuel glass melting furnace also needs to use concave refractory...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 佘建锋
Owner 长兴泓矿炉料有限公司
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