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Process of preparing magnesia Allen ceramic material with waste magnesia carbon brick and magnesia alumina carbon brick

A magnesia-alumina-carbon brick and ceramic material technology, which is applied in the field of refractory material preparation, can solve the problems of wasting resources, polluting the environment, polluting the service life, etc., and achieves the effects of low cost, good mechanical properties and excellent performance.

Active Publication Date: 2007-01-03
山西昊业新材料开发有限公司 +1
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Problems solved by technology

However, due to the large pollution and short service life of waste refractory materials such as magnesia-carbon bricks and magnesia-alumina-carbon bricks in the secondary use or downgrade use, most of the waste refractory materials are buried as solid waste. Not only pollute the environment, but more importantly waste the available resources
At present, there is still a lack of effective methods for recycling and reusing waste refractory materials at home and abroad.

Method used

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  • Process of preparing magnesia Allen ceramic material with waste magnesia carbon brick and magnesia alumina carbon brick

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specific Embodiment approach 2

[0024] Two of the more specific methods of the present invention are:

[0025] (1) Raw materials are assembled according to the formula; the raw material formula is: waste and old magnesia-carbon bricks, 50%, waste and old magnesia-alumina-carbon bricks, 50%;

[0026] (2) crushing and mixing; the raw materials were ball milled in a planetary ball mill for 6 hours, and ground to a particle size of less than 5um;

[0027] (3) dry; put into 100 ℃ drying box and dry for 5 hours;

[0028] (4) Pressure molding; add polyvinyl alcohol binder according to the ratio of 0.5mL / 10g, mix well, and machine press molding under a pressure of 40MPa;

[0029] (5) Heating and sintering treatment; pass in ordinary nitrogen (99.99%), the nitrogen pressure is 0.1Mpa, the temperature is raised to 1700°C (5°C / min), and the holding time is 5h.

[0030] Structural characterization of the prepared magnesium-alon ceramic material: XRD results show that pure MgAlON is synthesized. Since its raw material ...

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Abstract

The present invention is process of preparing magnesia Allen ceramic material with waste magnesia carbon brick and magnesia alumina carbon brick, and belongs to the field of waste refractory material recovery and reuse, and the preparation process is low in cost and easy application in industrial production. Waste magnesia carbon brick in 10-60 wt% and magnesia alumina carbon brick in 40-90 wt% as materials are crushed, mixed, dried, pressure formed and sintered to form magnesia Allen ceramic material. X ray diffraction result shows that the magnesia Allen ceramic material has MgAlON content up to 95 % and the excellent performance similar that that of conventional magnesia Allen ceramic material, and the SEM pictures proves its excellent mechanical performance.

Description

technical field [0001] The invention relates to the preparation of refractory materials, in particular to the recovery and reuse of waste refractory materials. Background technique [0002] The iron and steel industry produces a large amount of waste refractory materials every year. In my country, only a small part of waste refractory materials are used for secondary use or downgraded, mainly as soil conditioners or aggregates in refractory castables. However, due to the large pollution and short service life of waste refractory materials such as magnesia-carbon bricks and magnesia-alumina-carbon bricks in the secondary use or downgrade use, most of the waste refractory materials are buried as solid waste. Not only pollute the environment, but more importantly waste the available resources. At present, there is still a lack of effective methods for recycling and reusing waste refractory materials at home and abroad. Contents of the invention [0003] The purpose of the p...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/04C04B35/10C04B35/622C04B35/66
Inventor 王习东张梅李华军董鹏莉张志安王海娟卢虎山高丽珊
Owner 山西昊业新材料开发有限公司
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