Special pouring material for coal injection pipe

A castable and coal injection pipe technology, applied in the field of refractory materials, can solve problems such as restricting the operation rate of cement kiln production lines, affecting the economic benefits of cement manufacturers, and non-wear-resistant coal injection pipe castables, achieving high strength and reducing internal stress. , Improve the effect of seismic stability

Active Publication Date: 2013-06-05
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still cannot meet the needs of customers, especially in some cement kilns with harsher operating environments. The current castables for coal injection pipes in cement kilns are not wear-resistant and prone to thermal spalling, which seriously restricts the increase in the operation rate of cement kiln production lines and affects the cement kiln. Manufacturer's economic benefits

Method used

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  • Special pouring material for coal injection pipe
  • Special pouring material for coal injection pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A special castable for coal injection pipe, the weight percentage of the components contained in it is:

[0051] Silicon carbide 10%

[0052] Andalusite 30%

[0053] Corundum 20%

[0054] Spinel Powder 15%

[0055] Zircon mullite powder 10%

[0056] Alumina fine powder 10%

[0057] Microsilica 3%

[0058] Pure calcium aluminate cement 2%

[0059] And accounting for 0.5% of the total weight of the above-mentioned components of explosion-proof fiber and 0.2% of sodium tripolyphosphate.

Embodiment 2

[0061] A special castable for coal injection pipe, the weight percentage of the components contained in it is:

[0062] Silicon carbide 25%

[0063] Andalusite 15%

[0064] Corundum 35%

[0065] Spinel Powder 5%

[0066] Zircon mullite powder 5%

[0067] Alumina fine powder 5%

[0068] Microsilica 6%

[0069] Pure calcium aluminate cement 4%

[0070] And accounting for 0.5% of the total weight of the above-mentioned components of explosion-proof fiber and 0.2% of sodium tripolyphosphate.

Embodiment 3

[0072] A special castable for coal injection pipe, the weight percentage of the components contained in it is:

[0073] Silicon carbide 15%

[0074] Andalusite 20%

[0075] Corundum 29%

[0076] Spinel Powder 10%

[0077] Zircon mullite powder 6%

[0078] Alumina fine powder 7%

[0079] Microsilica 8%

[0080] Pure calcium aluminate cement 5%

[0081] And accounting for 0.5% of the total weight of the above-mentioned components of explosion-proof fiber and 0.2% of sodium tripolyphosphate.

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Abstract

The invention discloses a special pouring material for a kiln opening and belongs to the field of a refractory material. The special pouring material comprises the following components by weight percent: 10-25% of silicon carbide, 15-30% of andalusite, 20-35% of corundum, 5-15% of spinel powder, 5-10% of zircon mullite powder, 5-15% of aluminum oxide micro powder, 3-8% of silicon micro powder, 2-5% of pure calcium aluminate cement, and 0.5% and 0.2% of anti-explosion fibers and sodium tripolyphosphate serving as additives. The special pouring material is capable of efficiently improving the wear resistance and avoiding the hot peeling phenomenon of the cement kiln coal injection pipe, has the characteristics of high temperature resistance, heat vibration resistance, wear resistance, high strength, irreversible micro inflation, and the like, and is capable of greatly prolonging the service life of the cement kiln coal injection pipe.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a special casting material for coal injection pipes. Background technique [0002] At present, my country's new dry process cement production line is developing rapidly, so higher requirements are put forward for the use of refractory materials. The new dry process cement production technology widely adopts new technologies such as increasing combustion intensity, enhancing heat transfer effect, reducing heat loss and reducing environmental pollution, which has raised the cement production level to a new stage. However, due to higher temperature, more rapid temperature changes, stronger chemical erosion and more severe mechanical stress, the new dry process cement production line needs more refractory materials with excellent performance. [0003] The coal injection pipe of cement kiln is used in a harsh environment. The coal injection pipe should be inserted into the interio...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B35/66
Inventor朱锦和常正钦朱国平山国强朱其良彭晶晶王琪佘春萍李新明徐燕萍
OwnerZHEJIANG KINGCRED NEW MATERIAL CO LTD