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Fireproof product for cement rotary kiln transition belt

A technology of cement rotary kiln and refractory products, which is applied in the field of refractory composition products, which can solve the problems of non-compatibility of refractory compositions, achieve normal temperature compressive strength and increase softening temperature under load, low glass phase content, and prolong firing The effect of holding time

Inactive Publication Date: 2007-02-28
YIXING REFRACTORY EQUIP & MATERIAL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is known that different application occasions have different requirements for refractory compositions, so general refractory compositions are not universal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Al 2 o 3 91%, bulk density 3.2g / cm 3 Bauxite clinker skeleton material 65%, silicon carbide 15%, Al 2 o 3 35% of clay 10%, corundum 10%, silicon carbide, corundum, clay are all added in the form of ≤0.074mm fine powder. Mixed pressed bricks, fired at 1450°C. Test result: chemical composition Al 2 o 3 72%, SiO 2 12%, SiC14.5%; physical properties: 0.2Mpa load softening temperature 1570 ℃, normal temperature compressive strength 85Mpa.

Embodiment 2

[0029] Example 2: Al 2 o 3 92%, bulk density 3.15g / cm 3 Bauxite Clinker Skeleton Material 75%, Al 2 o 3 59.5%, Fe 2 o 3 0.6% andalusite 5%, silicon carbide 6%, Al 2 o 3 33% clay 5%, corundum 9%, andalusite, silicon carbide, corundum, and clay are all added in the form of ≤0.08mm fine powder. Mixed pressed bricks, fired at 1480°C. Test result: chemical composition Al 2 o 3 79%, SiO 2 14%, SiC5.5%; physical properties: 0.2Mpa load softening temperature 1610 ℃, normal temperature compressive strength 90Mpa.

Embodiment 3

[0030] Example 3: Al 2 o 3 90%, bulk density 3.0g / cm 3 Bauxite Clinker Skeleton Material 55%, Al 2 o 3 58%, Fe 2 o 3 1.0% andalusite 15%, silicon carbide 12%, Al 2 o 3 35% of clay 13%, corundum 5%, andalusite, silicon carbide, corundum, and clay are all added in the form of ≤0.074mm fine powder. Mixed pressed bricks, fired at 1530°C. Test result: chemical composition Al 2 o 3 67%, SiO 2 20%, SiC11%; physical properties: 0.2Mpa load softening temperature 1660 ℃, normal temperature compressive strength 110Mpa.

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Abstract

The invention discloses a fireproof composition product of cement rotary kiln transmitting belt through dried method, which comprises the following parts: 50-79% alumina clinker aggregate with Al2O3 not less than 90% and bulk density not less than 3.0g / cm3, 5-20% silicon carbide, 3-15% clay with Al2O3 not less than 32%, 3-15% alumina, wherein the silicon carbide, clay and alumina are added at 0.1-10mm fined powder pattern, which possesses 63-75% Al2O3,8-32.5% SiO2 and 4.5-19% SiC for sintered components.

Description

technical field [0001] The invention relates to a refractory composition product, in particular to a refractory product for the transition zone of a dry-process cement rotary kiln. Background technique [0002] The temperature in the transition zone of the dry-process cement rotary kiln is high, usually around 1600°C, and the temperature changes frequently, which becomes the most concentrated area of ​​stress in the kiln body, making the kiln skin difficult to hang firmly, and it hangs when it falls off, making the refractory kiln lining often directly Exposure to high-temperature air flow, and the large flow rate of fired material causes the kiln speed to be extremely fast, so objectively, the refractory lining bricks in this part suffer the strongest destructive power. Therefore, this part has become the most critical part of the whole kiln with the most severe service conditions and the most critical influence on the service life of the kiln body. In the prior art, the r...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10
Inventor 陈祝富王晓刚郑克明方涛涛孙顺才
Owner YIXING REFRACTORY EQUIP & MATERIAL FACTORY
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