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A prefabricated part of magnesium-iron-aluminum spinel coal injection pipe

A magnesium-iron-aluminum spinel and iron-aluminum spinel technology is applied in the field of magnesium-iron-aluminum spinel coal injection pipe prefabrication, which can solve the problems of short service life, inconvenience, and poor thermal shock resistance of the coal injection pipe , to achieve good economic benefits and market application prospects, simple construction, and good high temperature resistance

Active Publication Date: 2017-11-14
长兴兴鹰新型耐火建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the original cement kiln system, aluminum-silicon refractory castables are usually used at the coal injection pipes. The thermal shock resistance of this product is relatively poor. Generally, the service life of the aluminum-silicon refractory castables at the coal injection pipes does not exceed 6 months.
For example, the announcement number is CN101805195A (2010-08-18), which discloses a method for preparing high-performance wear-resistant castables for coal injection pipes. Silicon oxide micropowder and silicon carbide are added to high-alumina raw materials to improve the heat resistance of the material. However, the service life of the coal injection pipe is still not long. The original coal injection pipe was constructed on site, which is very inconvenient. Therefore, the prefabricated parts of the coal injection pipe have become very popular. In order to improve the operation rate of the entire firing system , To enhance the market competitiveness of enterprises, new dry process cement production enterprises urgently need high-quality refractory castables to be applied to their thermal equipment

Method used

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  • A prefabricated part of magnesium-iron-aluminum spinel coal injection pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A magnesia-iron-aluminum spinel coal injection pipe prefabricated part, the preparation method is as follows:

[0040] (1) Weigh each component according to formula 1; pour it into the stirring device and stir evenly to obtain the mixing material B;

[0041] (2) Add water to the mixing material B in the step (1), and stir evenly to obtain the mixing material C;

[0042] (3) Add the mixture C in the step (2) into the mold for making the prefabricated coal injection pipe until the surface is smooth, and obtain the prefabricated sample of the coal injection pipe;

[0043] (4) Place the sample of the prefabricated part of the coal injection pipe and the mold in the step (3) in the air, let it stand for 36 hours, and then demould, to obtain the prefabricated sample of the coal injection pipe No. 1;

[0044] (5) The prefabricated sample of the coal injection pipe in the step (4) was naturally cured for 48 hours, and then the sample of the prefabricated coal injection pipe wa...

Embodiment 2

[0047] A magnesia-iron-aluminum spinel coal injection pipe prefabricated part, the preparation method is as follows:

[0048] (1) Weigh each component according to formula 2; pour it into the stirring device and stir evenly to obtain the mixing material B;

[0049] (2) Add water to the mixing material B in the step (1), and stir evenly to obtain the mixing material C;

[0050] (3) Add the mixture C in the step (2) into the mold for making the prefabricated coal injection pipe until the surface is smooth, and obtain the prefabricated sample of the coal injection pipe;

[0051] (4) Place the sample of the prefabricated part of the coal injection pipe and the mold in the step (3) in the air, let it stand for 36 hours, and then demould, to obtain the prefabricated sample of the coal injection pipe No. 1;

[0052] (5) The prefabricated sample of the coal injection pipe in the step (4) was naturally cured for 48 hours, and then the sample of the prefabricated coal injection pipe wa...

Embodiment 3

[0055] A magnesia-iron-aluminum spinel coal injection pipe prefabricated part, the preparation method is as follows:

[0056] (1) Weigh each component according to formula 3; pour it into the stirring device and stir evenly to obtain the mixing material B;

[0057] (2) Add water to the mixing material B in the step (1), and stir evenly to obtain the mixing material C;

[0058] (3) Add the mixture C in the step (2) into the mold for making the prefabricated coal injection pipe until the surface is smooth, and obtain the prefabricated sample of the coal injection pipe;

[0059] (4) Place the sample of the prefabricated part of the coal injection pipe and the mold in the step (3) in the air, let it stand for 48 hours, and then remove the mold to obtain the prefabricated sample of the coal injection pipe No. 1;

[0060] (5) The prefabricated sample of the coal injection pipe in the step (4) was naturally cured for 60 hours, and then the sample of the prefabricated coal injection ...

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Abstract

The invention relates to a prefabricated part of a magnesium-iron-aluminum spinel coal injection pipe, including 15-20 parts of fused magnesia-aluminum spinel particles of 5-8mm, 20-25 parts of 3-5mm, and 15-20 parts of 1-3mm Parts, 20-25 parts of 0-1mm; 10-12 parts of fused iron-aluminum spinel particles of 5-8mm, 15-17 parts of 3-5mm, 10-13 parts of 1-3mm, 0-1mm 15‑18 parts; 5‑8 parts of zirconium carbonate, 5‑9 parts of silicon carbide, 3‑5 parts of silicon micropowder, 8‑12 parts of alumina micropowder, 1‑3 parts of anti-seepage agent, 0.25‑0.8 part of rust inhibitor, 0.1-1 part of water reducing agent, 0.1-1 part of retarder, 3-10 parts of dispersant, 1-5 parts of explosion-proof agent, the prefabricated coal injection pipe of the present invention has better high temperature resistance, alkali resistance and heat resistance Shock and other characteristics, and has a long service life.

Description

technical field [0001] The invention relates to the field of materials, in particular to a prefabricated part of a magnesium-iron-aluminum spinel coal injection pipe. Background technique [0002] The coal injection pipe of cement kiln is used in a harsh environment. The coal injection pipe should be inserted into the interior of the cement kiln. It is necessary to require that the refractory castable here has good wear resistance and high thermal shock stability. In the original cement kiln system, aluminum-silicon refractory castables are usually used at the coal injection pipes. The thermal shock resistance of this product is relatively poor. Generally, the service life of the aluminum-silicon refractory castables at the coal injection pipes does not exceed 6 months. . For example, the announcement number is CN101805195A (2010-08-18), which discloses a method for preparing high-performance wear-resistant castables for coal injection pipes. Silicon oxide micropowder and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66B28B1/14
Inventor 王强许高山国强
Owner 长兴兴鹰新型耐火建材有限公司