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A low carbon magnesia carbon brick

A carbon magnesia carbon brick and magnesia carbon brick regeneration technology, which is applied in the field of metallurgy, can solve the problems of rapid heat loss in molten steel, high thermal conductivity, and increased carbon content, and achieve the goal of preventing carbon increase in molten steel, low thermal conductivity, and low cost Effect

Inactive Publication Date: 2011-12-14
SHANDONG KEXIN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to overcome the disadvantages of high thermal conductivity of ladle lining in existing iron and steel smelting, rapid heat loss of molten steel, need to increase tapping temperature, prolong refining time, etc., high energy consumption, and increased carbon content

Method used

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  • A low carbon magnesia carbon brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1, take by weight 94 parts of fused magnesia, by B 4 C, 2.2 parts of non-oxide additives mixed with Al, Si, Al-Mg alloy powder in any weight ratio, 4.5 parts of regenerated magnesia-carbon brick powder produced in the process of processing used magnesia-carbon bricks, composed of phenolic 3.1 parts of carbon resin binder and 0.1 part of carbon fiber mixed with resin, pitch and furan resin in any weight ratio. The production process is mainly divided into three stages: kneading, forming and heat treatment:

[0013] (1) Mixing: According to the weight ratio of the above formula, pour the fused magnesia granules, magnesia-carbon brick recycled micropowder, carbon fiber and non-oxide additives into the mixing machine for pre-mixing for 2-4 minutes, then add phenolic Resin binder, mixed for 25-30 minutes to discharge;

[0014] (2) Forming: Pour the mud material into the 630T friction press according to the calibrated single weight, according to the forming rule ...

Embodiment 2

[0017] Embodiment 2, take by weight 92 parts of fused magnesia, by B 4 C, 3.6 parts of non-oxide additives mixed with Al, Si, Al-Mg alloy powder in any weight ratio, 6 parts of regenerated magnesia-carbon brick powder produced in the process of processing used magnesia-carbon bricks, composed of phenolic 4.2 parts of carbon resin binder and 0.08 parts of carbon fiber are formed by mixing resin, pitch and furan resin in any weight ratio. The production process and effect are the same as above.

Embodiment 3

[0018] Embodiment 3, take by weight 86 parts of fused magnesia, by B 4 C, 4.5 parts of non-oxide additives mixed with Al, Si, Al-Mg alloy powder in any weight ratio, 8 parts of regenerated magnesia-carbon brick powder produced in the process of processing used magnesia-carbon bricks, composed of phenolic 3.6 parts of carbon resin binder and 0.13 parts of carbon fiber are formed by mixing resin, pitch and furan resin in any weight ratio. The production process and effect are the same as above.

[0019] The following table is a comparative analysis of the performance of the low-carbon magnesia-carbon brick products obtained in the above three examples and the common formula magnesia-carbon brick products.

[0020]

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Abstract

The invention discloses a low-carbon magnesia-carbon brick, which is characterized in that it is prepared from the following raw materials in weight ratio: 80-95% of fused magnesia, 0-5% of non-oxide additives, magnesia-carbon brick Recycled material powder 3-9%, carbon resin binder 2-5%, carbon fiber 0.01-0.2%. The low-carbon magnesia-carbon bricks produced in this way have excellent performance, good thermal shock resistance, and high product performance, especially high strength. Adding regenerated magnesia-carbon brick powder and carbon fiber can realize resource recycling and be used in low-carbon steel and ultra-low carbon steel. It plays a very important role in improving the service life of the ladle lining and preventing the carburization of molten steel.

Description

Technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a low-carbon magnesia-carbon brick for iron and steel smelting ladle lining. Background technique [0002] At present, ordinary magnesia-carbon bricks are generally used for iron and steel smelting ladle lining, and their carbon content is generally between 10% and 16%. In the process, it is necessary to increase the tapping temperature and prolong the refining time, which increases the energy consumption accordingly. In addition, magnesia-carbon bricks with high carbon content add a large amount of C to molten steel, which reduces the cleanliness of molten steel. Bricks are difficult to adapt to the requirements. Contents of the invention [0003] The main purpose of the present invention is to overcome the disadvantages of high thermal conductivity of ladle lining in existing iron and steel smelting, rapid heat loss of molten steel, need to increase tapping t...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 柯美亚田守信
Owner SHANDONG KEXIN NEW MATERIALS
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