Method for producing magnesia carbon bricks for refining ladle lining by using waste magnesia carbon bricks

A technology of magnesia-carbon bricks and refined steel, which is applied in the production and application of ceramic materials, household appliances, etc., can solve the problems of resource and environmental waste, groundwater pollution, land waste, etc., to eliminate land, solve hazards, and reduce resource waste Effect

Pending Publication Date: 2019-03-01
郑州顺通新型耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Causes a lot of waste of resources, due to the use of landfills to deal with a lot of waste materials, resulting in land waste and groundwater pollution and other factors
Great waste and harm to resources and environment

Method used

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  • Method for producing magnesia carbon bricks for refining ladle lining by using waste magnesia carbon bricks

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 The present invention uses waste magnesia-carbon bricks to produce magnesia-carbon bricks for refining ladle linings, which is made of waste magnesia-carbon bricks, 195 flake graphite, and high-temperature pitch powder (coal tar pitch that meets the GB / T2290-94 standard in a coking plant) ), MgO≥97% fused magnesium (bulk density≥3.45g / cm 3 , Ca / Si≥2.0), phenolic resin binder, antioxidant metal silicon, and metal aluminum are prepared according to the following proportions by weight:

[0026] Ingredients:

[0027] 62 parts of waste magnesia carbon bricks, including: 15-18 parts of granular materials with a particle size of 5-8mm, 12-15 parts of granular materials with a particle size of 3-5mm, 20 parts of granular materials with a particle size of 1-3mm, and fine powder with a particle size of ≤0.088mm 12 copies;

[0028] 8 parts of 195 flake graphite;

[0029] 2 parts of high temperature asphalt powder;

[0030] 30 parts of fused magnesium, including: 10 p...

Embodiment 2 application example

[0038] The finished magnesia-carbon brick prepared by the present invention is used in Tianjin Daqiang Iron and Steel Works: it is used on a Φ4600mm electric furnace. Due to the hot charging of molten iron in the other side, the furnace age reaches 1067 times (the traditional brick body furnace age is 230 times). Used on Tianjin Daqiang 50-ton refining ladle, the average ladle age is 92 times when the overall ladle is offline (the service life of traditional refining ladle is 45-50 times);

[0039] When used by Guangdong Taiye Metal Products Co., Ltd.: when it is used on an 80-ton refined steel ladle, and the ladle age reaches 83 times (the traditional refined steel ladle is used 65-70 times), due to the expiry of the service life of the breathable brick, the ladle is unpacked, 200mm The thinnest part of the brick is 125mm; when used on a Φ5200mm EBT electric furnace, the other side is 100% scrap steel, and the furnace life reaches between 392 and 415 times (the traditional ser...

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Abstract

The invention discloses a method for producing magnesia carbon bricks for a refining ladle lining by using waste magnesia carbon bricks. Ingredients include 62 parts of waste magnesia carbon bricks, 8parts of graphite, 2 parts of high temperature asphalt powder, 30 parts of fused magnesium and 3.0-3.2% of binder. The method includes immersing the waste bricks in water for 30 days, drying, crushing and sieving; mixing granules into a mixing mill for uniform mixing, adding the binder and powder for mixing for 30-40 minutes and rolling out; pressing the rolled material into blanks and calciningat low temperature for 10 hours. The waste magnesia carbon bricks are used as the main material and utilized to reduce resource waste, the manufacturing cost of products is also greatly reduced, the problem of disposal of waste materials is solved, the harm to the environment caused by the waste refractory materials is reduced, and the method is more environmentally friendly. Compared with the existing magnesia carbon bricks, the manufactured magnesia carbon bricks have comparable or improved performance indexes. When the manufactured magnesia carbon bricks are used in steelmaking furnaces orrefining ladles, the service life is not reduced, but the service life of the equipment is prolonged.

Description

technical field [0001] The invention relates to a production method of refractory materials, in particular to a method for producing magnesia-carbon bricks for refining ladle inner linings by using waste magnesia-carbon bricks. Background technique [0002] In the late 1980s, magnesia carbon bricks developed very rapidly in my country. Its main source of material is fused magnesium in Northeast my country. During production, fused magnesia is crushed and sieved, and then graphite, metal aluminum, metal silicon, asphalt powder and binder are added in proportion, stirred evenly, and then roasted at a low temperature of 180-200°C. The manufacturing cost is high, and the material utilization rate is low. The waste materials after use shall be buried on site. A large amount of waste of resources is caused. Due to the way of burying a large amount of waste materials, land waste and groundwater pollution are caused. It causes great waste and harm to resources and the environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B33/132
CPCC04B33/1324C04B35/66C04B2235/77C04B2235/96Y02P40/60
Inventor 牛伟海张顺卿张晓强
Owner 郑州顺通新型耐火材料有限公司
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