Carbon/magnesium aluminum spinel composite powder

A magnesia-aluminum spinel and composite powder technology, applied in the field of inorganic composite materials, can solve the problems of difficult carbon dispersion, high cost, limitation and the like, and achieve the effects of improving the carbon dispersion problem, reducing the production cost and making the preparation process simple.

Active Publication Date: 2017-11-07
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of micron-scale carbon is complicated, the cost is high, and it is easy to agglomerate during the mixing process with oxides, and it is difficult to disperse in refractory materials
The difficulty of carbon dispersion restricts its advantages

Method used

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  • Carbon/magnesium aluminum spinel composite powder
  • Carbon/magnesium aluminum spinel composite powder
  • Carbon/magnesium aluminum spinel composite powder

Examples

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preparation example Construction

[0026] The carbon / magnesium aluminum spinel composite powder prepared by the present invention not only has the advantages of carbon and magnesium aluminum spinel in resisting slag erosion, but more importantly, it solves the problem of carbon dispersion and can endow refractory materials with superior erosion resistance performance.

[0027] In the carbon / magnesium aluminum spinel composite powder prepared by the present invention, the particle size of carbon is reduced and the specific surface area is increased, so that the application of the composite powder can improve the corrosion resistance and heat resistance of the carbon-containing refractory while reducing the carbon content. shock resistance; refractory materials containing magnesium-aluminum spinel have good corrosion resistance, which is attributed to the fact that magnesium-aluminum spinel can absorb steel slag low-melting point oxides to form a solid solution without forming low-melting point oxides, and can cha...

Embodiment 1

[0029] This embodiment provides a preparation method of carbon / magnesium aluminum spinel composite powder, the raw materials include: magnesium oxalate (purity ≥ 99.0%), magnesium peroxide composite powder (content ≥ 30.0%, the rest is magnesium oxide), aluminum powder (purity ≥ 99.0%) and aluminum oxide (purity ≥ 99.0%) are raw materials, by mass percentage, magnesium oxalate is 33.4%, magnesium peroxide is 22.2%, aluminum oxide is 22.2%, aluminum powder is 22.2%;

[0030] It includes the following steps: put the above-mentioned uniformly mixed raw materials into a mold, and then dry press them to form a cylindrical sample with a diameter of 20mm and a height of 30mm; after the molding is completed, the sample is demoulded, and then Put it into a self-propagating high-temperature reaction furnace, place a C-Ti igniter on the sample, and the self-propagating high-temperature synthesis reaction is initiated by the heat generated by the C-Ti reaction placed on the top of the samp...

Embodiment 2

[0033] This example provides a method for preparing carbon / magnesium aluminum spinel composite powder. The difference from Example 1 is that, by mass percentage, magnesium oxalate is 28.6%, magnesium peroxide is 28.6%, and aluminum oxide is 19.0%. , aluminum powder is 23.8%;

[0034] Carry out X-ray diffraction analysis to the prepared carbon / magnesium-aluminum spinel composite powder, obtain XRD pattern see Figure 4 ,Depend on Figure 4 It can be seen that the main components of the composite powder include carbon, magnesium aluminum spinel and magnesium oxide. The carbon / magnesium aluminum spinel composite powder prepared in embodiment 2 has been carried out Raman spectroscopic analysis, and the Raman spectrogram that obtains sees Figure 5 ,Depend on Figure 5 It can be seen that the prepared carbon / magnesium aluminum spinel composite powder contains carbon.

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Abstract

The invention discloses carbon / magnesium aluminum spinel composite powder. The composite powder comprises the following raw materials in percentage by mass: 28.6%-40.8% of magnesium oxalate, 20.6%-28.6% of magnesium peroxide, 19.0%-22.2% of alumina and 19.8%-23.8% of aluminum powder, and the sum of the mass percentages of the raw materials is 100%. Preferably, the composite powder comprises the following raw materials in percentage by mass: 33.4% of magnesium oxalate, 22.2% of magnesium peroxide, 22.2% of alumina and 22.2% of aluminum powder. The composite powder solves the problem that carbon in carbon-containing refractory materials is difficult to disperse uniformly and easy to agglomerate, and the prepared composite powder has fine grains and can be better applied in the field of refractory materials.

Description

technical field [0001] The invention belongs to the technical field of inorganic composite materials, and in particular relates to a novel carbon / magnesium aluminum spinel composite powder. Background technique [0002] Refractory materials refer to a class of inorganic non-metallic materials with a refractoriness not lower than 1500°C. Refractory materials include natural ores and are manufactured according to certain industrial requirements. They have certain high-temperature mechanical properties and good volume stability, and are necessary materials for various high-temperature-resistant equipment. Refractory materials are widely used in chemical industry, petroleum, metallurgy, machinery manufacturing, power and other industrial fields, especially in the metallurgical industry, and play an irreplaceable important role in the development of high-temperature industrial production. [0003] Carbon-containing refractories are a kind of refractory materials. The carbon in c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/443C04B35/52C04B35/66C04B35/63
CPCC04B35/443C04B35/52C04B35/6303C04B35/66C04B2235/3217C04B2235/402
Inventor 肖国庆吕李华丁冬海任耘杨守磊
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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