Nanocarbon reinforced low-carbon magnesia carbon brick and preparation method thereof

A carbon-magnesia-carbon brick and nano-carbon technology, which is applied in the field of refractory materials, can solve problems such as high carbon content, sintering performance of magnesia-carbon bricks, reduced thermal shock resistance of oxidation resistance, and insufficient performance of low-carbon magnesia-carbon bricks, etc., to achieve reduction Effects of porosity, raw material cost saving, and total carbon reduction

Inactive Publication Date: 2018-09-04
营口石元耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides nano-carbon reinforced low-carbon magnesia-carbon bricks and a preparation method thereof. The carbon content of bricks is too high, or the performance of low-carbon magnesia-carbon bricks is insufficient, and the sintering performance, oxidation resistance, and thermal shock performance of the magnesia-carbon bricks have not been reduced, and are even better than existing magnesia-carbon bricks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The low-carbon magnesia-carbon brick reinforced by nano-carbon of this embodiment has a mass ratio of raw materials: magnesia 90% (magnesia particles 60%, magnesia fine powder 30%), nano-carbon black 2.5%, antioxidant aluminum powder (purity≥98%, particle size≤100μm) 3.5%, phenolic resin 4%.

[0027] Its preparation method is carried out according to the following steps:

[0028] (1) Ingredients by mass ratio: magnesia 90% (magnesia particles 60%, magnesia fine powder 30%), nano-carbon black 2.5%, antioxidant aluminum powder (purity ≥ 98%, particle size ≤ 100 μm) 3.5%, 4% phenolic resin configuration raw material;

[0029] (2) Mixing: Mixing in the following order: magnesia particles are ground and mixed for 2 minutes, then nano-graphite oxide flakes and aluminum powder are mixed for 5 minutes, then phenolic resin is mixed for 5 minutes, and finally magnesia fine powder is mixed for 10 minutes;

[0030] (3) Compression molding and drying: the uniformly ground raw mate...

Embodiment 2

[0033] The low-carbon magnesia-carbon brick reinforced by nano-carbon of the present embodiment has a mass ratio of raw materials: magnesia 90% (magnesia particle 65%, magnesia fine powder 25%), nano-carbon black 3.5%, antioxidant silicon powder (purity≥98%, particle size≤100μm) 2.5%, phenolic resin 4%.

[0034] Its preparation method is carried out according to the following steps:

[0035] (1) Ingredients by mass ratio: magnesia 90% (magnesia particles 65%, magnesia fine powder 25%), nano-carbon black 3.5%, antioxidant silicon powder (purity ≥ 98%, particle size ≤ 100 μm) 2.5%, 4% phenolic resin configuration raw material;

[0036] (2) Mixing: Grind and mix magnesia particles for 2 minutes, add nano-carbon black and silicon powder for 5 minutes, add phenolic resin for 5 minutes, and finally add magnesia fine powder and mix for 10 minutes;

[0037] (3) Compression molding and drying: the uniformly ground raw materials are pressed into 200mm×50mm×50mm square bricks with an e...

Embodiment 3

[0040] The low-carbon magnesia-carbon brick reinforced by nano-carbon of the present embodiment has a mass ratio of raw materials: magnesia 90% (magnesia particles 60%, magnesia fine powder 30%), carbon nanotubes 2%, nano-carbon black 1 %, antioxidant aluminum powder (purity ≥ 98%, particle size ≤ 100 μm) 3%, phenolic resin 4%.

[0041] Its preparation method is carried out according to the following steps:

[0042] (1) Ingredients by mass ratio: magnesia 90% (magnesia particles 60%, magnesia fine powder 30%), carbon nanotubes 2%, nano carbon black 1%, antioxidant aluminum powder (purity ≥ 98%, particle size ≤100μm) 3%, phenolic resin 4% configuration raw materials;

[0043] (2) Mixing: Grind and mix magnesia particles for 2 minutes, then add carbon nanotubes, nano-carbon black, and aluminum powder for 5 minutes, then add phenolic resin for 5 minutes, and finally add magnesia fine powder for 10 minutes;

[0044] (3) Compression molding and drying:. The uniformly ground raw ...

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Abstract

The invention belongs to the technical field of refractory materials and particularly relates to a nanocarbon reinforced low-carbon magnesia carbon brick and a preparation method of the nanocarbon reinforced low-carbon magnesia carbon brick. The nanocarbon content of the nanocarbon reinforced low-carbon magnesia carbon brick is 2-4%, and is 50% of the carbon content of the current mainstream magnesia carbon brick. The sintering performance, the antioxygenic property and the thermal shock performance of the magnesia carbon brick are not reduced and are even better than those of the existing magnesia carbon brick. The required total carbon is reduced by a half, the material cost is reduced, and the service life of the magnesia carbon brick is also prolonged; and in addition, the preparationcost is low, the process is simple, and the magnesia carbon brick is suitable of industrial application and large-scale promotion.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a nano-carbon reinforced low-carbon magnesia-carbon brick and a preparation method thereof. Background technique [0002] Magnesia carbon brick (MgO-C) refractories are widely used in iron and steel and non-ferrous fields due to their excellent slag resistance. Carbon in magnesia-carbon brick refractories has many positive effects, and its content is generally 12-18% (w). On the one hand, carbon has a higher melting point (3823K) and a lower wetting angle (to slag), thus improving the corrosion resistance of refractory materials; on the other hand, due to carbon's low thermal expansion, high thermal conductivity and low elasticity Modulus, so that the thermal shock resistance of the refractory material is also improved. [0003] However, with the development of smelting technology and the improvement of product performance requirements, people found tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043C04B35/78
CPCC04B35/043C04B35/78C04B2235/3217C04B2235/424C04B2235/77C04B2235/96C04B2235/9607
Inventor 马北越任鑫明苏畅张亚然于敬雨石明东
Owner 营口石元耐火材料有限公司
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