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Tertiary air duct curve prefabricated component for cement kiln

A technology for cement kilns and prefabricated parts, applied in the field of refractory materials, can solve problems such as poor erosion resistance, and achieve the effects of improving wear resistance and alkali erosion resistance, prolonging service life and ensuring construction quality.

Inactive Publication Date: 2015-08-12
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a prefabricated part of a tertiary air duct bend for a cement kiln, aiming to solve the problem of poor erosion resistance of the existing prefabricated part of a tertiary air duct bend

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of prefabricated part of third air duct curve for cement kiln, which includes 25 parts of 5-8mm black corundum, 15 parts of 3-5mm black corundum, 10 parts of 1-3mm black corundum, and 10 parts of 0 ~1mm black corundum, 10 parts of 0~1mm silicon carbide, 10 parts of silicon carbide powder not more than 200 mesh, 7 parts of brown corundum powder not more than 200 mesh, 4 parts calcium aluminate cement, 3 parts alumina powder, 6 parts silicon Micropowder, 0.10 part of water reducing agent, 0.01 part of explosion-proof fiber, 0.5 part of heat-resistant steel fiber. Al in the black corundum 2 O 3 The mass percentage content is ≥75%. The mass percentage content of SiC in the silicon carbide is ≥95%. Al in the calcium aluminate cement 2 O 3 The mass percentage content is ≥68%. The heat-resistant steel fiber grade is 430.

[0016] The various raw materials are mixed in proportions, and 4.1% by mass water is added to stir evenly, and then poured into a mold to form, and a...

Embodiment 2

[0018] The difference from other embodiments is: a prefabricated part of a third air duct curve for cement kilns, which includes 15 parts of 5-8mm black corundum, 20 parts of 3-5mm black corundum, 15 parts of 1 ~3mm black corundum, 15 parts of 0~1mm black corundum, 10 parts of 0~1mm silicon carbide, 6 parts of silicon carbide powder not greater than 200 mesh, 5 parts of brown corundum powder not greater than 200 mesh, 7 parts of calcium aluminate cement , 3 parts of alumina powder, 4 parts of silicon powder, 0.15 parts of water reducing agent, 0.02 parts of explosion-proof fiber, 1 part of heat-resistant steel fiber.

[0019] The various raw materials are mixed according to the proportion, and then mixed with 5.2% water by mass, and then poured into a mold. After demolding, curing and drying are carried out to obtain the third air duct bending preform for cement kiln.

Embodiment 3

[0021] The difference from other embodiments is: a prefabricated part of a third air duct bend for cement kilns, which includes 15 parts of 5-8mm black corundum, 18 parts of 3-5mm black corundum, and 13 parts of 1 ~3mm black corundum, 12 parts of 0~1mm black corundum, 10 parts of 0~1mm silicon carbide, 6 parts of silicon carbide powder not greater than 200 mesh, 10 parts of brown corundum powder not greater than 200 mesh, 7 parts of calcium aluminate cement , 5 parts of alumina powder, 4 parts of silicon powder, 0.10 parts of water reducing agent, 0.02 parts of explosion-proof fiber, 1 part of heat-resistant steel fiber.

[0022] The various raw materials are mixed in proportions and mixed with 4.5% water by mass, then mixed evenly, then poured into a mold, and cured and dried to obtain a prefabricated third air duct for cement kiln.

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Abstract

The present invention provides a with tertiary air duct curve prefabricated component for a cement kiln, and aims to resolve the problem of poor anti-erosion performance of the tertiary air duct curve of the prior art. The tertiary air duct curve prefabricated component for the cement kiln comprises the following components by weight parts of: 15-25 parts of 5-8mm black corundum, 15-20 parts of 3-5mm black corundum, 10-15 parts of 1-3mm black corundum, 10-15 parts of 0-1mm black corundum, 10-20 parts by 0-1mm of silicon carbide, 6-10 parts of silicon carbide powder not larger than 200 mesh, 5-10 parts of brown alumina powder not larger than 200 mesh, 4-7 parts of calcium aluminate cement, 3-5 parts of alumina powder, 4-6 parts of silica powder, 0.10-0.15 part of a water reducing agent, 0.01-0.02 part of explosion-proof fiber and 0.5-1 part of heat-resistant steel fiber. The invention uses black corundum and silicon carbide as the main materials for the tertiary air duct curve prefabricated component, and the black corundum can make the matrix and aggregate fully connect and cement at high temperature, effectively fill the pores of aggregate and significantly improve the high temperature properties of the material, thereby increasing the abrasion resistance and alkali erosion resistance of the tertiary air duct curve inner liner.

Description

Technical field [0001] The invention belongs to the technical field of refractory materials, and particularly relates to a prefabricated part of a third air duct curve for cement kilns. Background technique [0002] The inner lining of the third air duct elbow of the cement kiln needs to withstand the working temperature of 800-1100℃, resist the airflow with a wind speed of about 25m / s and the erosion of clinker fine particles, and is also corroded by alkali vapor, so the working conditions are bad and the damage is serious. , Often because the wear of the elbow part affects the normal operation of production. The refractory used in the lining of the tertiary duct elbow has undergone many changes. The first design was a high-aluminum castable with a use time of only one month, and then it was changed to a mullite corundum castable with a use time of only two months; The combined frame structure of moon mining high-strength wear-resistant bricks and mullite corundum castables can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王立旺常正钦朱国平王琪李新明
Owner ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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