Anti-skinning pouring material for cement kiln

An anti-skin and castable technology, applied in the field of refractory materials in the cement industry, can solve problems such as easy damage and poor thermal shock resistance, and achieve the effects of preventing skinning, improving skinning resistance, and enhancing skinning resistance.

Active Publication Date: 2011-03-23
ANHUI RUITAI NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is to add silicon carbide to the aluminum-silicon refractory material, add silicon carbide SiC, and produce SiO after oxidation 2 gas, SiO 2 A glaze layer is formed on the surface of the refractory material, which reduces the adhesion and erosion of the kiln material, thus making the refractory material have skinning resistance, and can improve the thermal shock resistance of the refractory material, and can withstand the blowing of the air cannon; a It is to add magnesia-aluminum spinel refractories to aluminum-silicon refractory materials. Since magnesia-alumina spinel is an alkaline substance, it does not react with CaO in kiln materials below 1200 ° C, so it can also reduce skinning. However, Magnesium-aluminum spinel material has good corrosion resistance, but poor thermal shock resistance. When blown with compressed air, magnesium-aluminum spinel material is easily damaged

Method used

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  • Anti-skinning pouring material for cement kiln
  • Anti-skinning pouring material for cement kiln
  • Anti-skinning pouring material for cement kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare according to the following recipe:

[0024] Aluminosilicate refractories with a particle diameter of 3-5mm 32%;

[0025] Aluminosilicate refractories with a particle diameter of 1-3mm 20%;

[0026] Aluminosilicate refractories with a particle diameter of 0.088-1mm 15%;

[0027] Fused magnesia-aluminum spinel or silicon carbide with a particle diameter of 0.088mm 12%;

[0028] Silicon nitride with a particle diameter of 0.088mm 5%;

[0029] α-alumina fine powder 5%;

[0030] Silica fume 5%;

[0031] Aluminate refractory cement 6%,

[0032] Further add 0.2% of the total weight of the water reducer and 0.06% of the total weight of the explosion-proof fiber to the above raw materials, and stir well to obtain the anti-skinning castable of the present invention, which can be packaged into bags after weighing Packed or barreled, when used, unpack the package, pour it into a mixer and add water to stir it into refractory concrete with suitable fluidity, pour it in...

Embodiment 2

[0034] Prepare according to the following recipe:

[0035] Aluminosilicate refractories with a particle diameter of 3-5mm 28%;

[0036] Aluminosilicate refractories with a particle diameter of 1-3mm 26%;

[0037] Aluminosilicate refractories with a particle diameter of 0.088-1mm 13%;

[0038] Fused magnesia-aluminum spinel or silicon carbide with a particle diameter of 0.088mm 10%;

[0039] Silicon nitride with a particle diameter of 0.088mm 7%;

[0040] α-alumina fine powder 5%;

[0041] Silica fume 5%;

[0042] Aluminate refractory cement 6%,

[0043] Further add 0.2% of the total weight of the water reducer and 0.08% of the total weight of the explosion-proof fiber to the above raw materials, and stir well to obtain the anti-skinning castable of the present invention, which can be packaged into bags after weighing Packed or barreled, when used, unpack the package, pour it into a mixer and add water to stir it into refractory concrete with suitable fluidity, pour it in...

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Abstract

The invention discloses an anti-skinning pouring material for a cement kiln, which is prepared by using a siliceous refractory material as a skeletal material and additionally adding electrically fused magnesia-alumina spinel or silicon carbide powder, silicon nitride, alpha aluminum oxide micropowder, siliceous dust and aluminous refractory cement and a water reducing agent or explosion-proof fiber. The anti-skinning pouring material can effectively reduce the phenomena of skinning and blocking in the cement kiln so as to further reduce the faults of the cement kiln and increase the operating rate of the same, the safety of the cement kiln is effectively enhanced, and the production cost is saved.

Description

technical field [0001] The invention relates to a refractory material for cement industry, more specifically, a castable for cement kiln. Background technique [0002] In the new dry process cement kiln, there is R 2 O, SO 3 Problems such as skinning and blockage caused by the cyclic enrichment of volatile components such as chloride and chloride. These volatile substances volatilize in the high temperature zone, enter the kiln tail with the flue gas, condense on the fly ash in the kiln gas, and are collected layer by layer by the cyclone, humidifying tower, and electrostatic precipitator, and then sent back to the burning zone. , evaporate again at high temperature. As a result, volatile substances are continuously circulated and enriched. After reaching equilibrium, R 2 O can be enriched 3 to 5 times, SO 3 It can be enriched by 3 to 5 times, and the chloride can be enriched by more than 100 times. Due to the presence of a large amount of volatile substances, some kil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张金龙李存弼陈雪峰周键王杰曾
Owner ANHUI RUITAI NEW MATERIALS TECH
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