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Magnesium-carbon composite material and preparation method thereof

A composite material, magnesium carbon technology, applied in the field of refractory materials, can solve the problems of high thermal conductivity of materials, large heat loss, unfavorable energy saving and consumption reduction, etc., to achieve low thermal conductivity, reduce thermal conductivity, and reduce heat loss Effect

Inactive Publication Date: 2012-11-14
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of graphite added in traditional magnesium carbon materials is more than 12%. Due to the presence of a large amount of graphite, the thermal conductivity of the material is high, and the heat loss during use is large. It is easy to transfer the heat contacted by the working surface, which is not conducive to energy saving. Consumption reduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A magnesium-carbon composite material and a preparation method thereof. Stir and mix 60~70wt% fused magnesia particles, 20~30wt% magnesite fine powder, 4~7wt% graphite, 1~3wt% additives and 2~3wt% binder, and press to form , and then baked at 150-230°C for 2-8 hours to obtain a magnesium-carbon composite material.

[0023] In this embodiment: the additive is metal aluminum; the binder is phenolic resin.

Embodiment 2

[0025] A magnesium-carbon composite material and a preparation method thereof. Stir and mix 60~70wt% sintered magnesite particles, 20~30wt% magnesite fine powder, 4~7wt% graphite, 1~3wt% additives and 2~3wt% binder, and press to form, Then bake at 150~230°C for 2~8 hours. A magnesium-carbon composite material is prepared.

[0026] In this embodiment: the additive is silicon powder; the binder is asphalt.

Embodiment 3

[0028] A magnesium-carbon composite material and a preparation method thereof. First, 55~60wt% of fused magnesia particles, 5~10wt% of fused magnesia fine powder, 20~30wt% of magnesite fine powder, 4~7wt% of graphite, 1~3wt% of additives, 2~3wt% binder, stirred and mixed, pressed and formed; then baked at 150~230°C for 2~8 hours to obtain a magnesium-carbon composite material.

[0029] In this embodiment: the additive is aluminum-silicon alloy powder; the binder is a mixture of phenolic resin and hexamethylenetetramine.

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PUM

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Abstract

The invention relates to a magnesium-carbon composite material and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps: mixing 60-90 wt% of magnesite, 5-30 wt% of magnesite fine powder, 1-7 wt% of graphite, 1-5 wt% of additive and 2-5 wt% of binder, and carrying out pressure molding; and baking at 150-350 DEG C for 2-24 hours to obtain the magnesium-carbon composite material. The magnesite is more than one of fused magnesite grains, sintered magnesite grains, fused magnesite fine powder and sintered magnesite fine powder. The composite material provided by the invention has the advantages of high melting point, strong oxidation resistance, high thermal shock stability, and metallurgical slag and metal bath permeation and corrosion resistance; and the thermal conductivity of the material is lower than that of the traditional magnesium-carbon composite material, thereby reducing the heat loss and benefiting energy-saving. The composite material is suitable for liners of metallurgical furnaces and containers.

Description

technical field [0001] The invention belongs to the technical field of refractory materials. In particular, it relates to a magnesium-carbon composite material and a preparation method thereof. Background technique [0002] Oxide-non-oxide composite materials are an important direction for the development of refractory materials. MgO-C refractory material has become an important refractory material used in the steel industry. It is made of magnesia and graphite with resin as a binder. Because graphite is not wetted by slag and has high thermal conductivity, carbon composite materials have excellent slag resistance and thermal shock stability, and are widely used in the lining of metallurgical furnaces and containers. In the late last century, the service life of refractory materials was greatly improved, and carbon composite refractory materials played an important role. [0003] With the increasing shortage of energy, saving energy and reducing consumption has become a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCY02P20/10
Inventor 魏耀武许兴堂李楠柯昌明韩兵强鄢文李友胜
Owner WUHAN UNIV OF SCI & TECH