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Prefabricated part of coal injection pipe head

A technology of prefabricated parts and coal injection pipes, which is applied in the field of refractory materials, can solve the problems of harsh working environment of refractory materials, affecting the operation cycle of rotary kiln, and difficult control of castable performance, and achieves high thermal strength, convenient maintenance and stable performance Effect

Active Publication Date: 2011-09-07
宜兴市泰科耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above points, it can be seen that due to the limitation of many factors on site construction, it is difficult to control the performance of castables. In this part, the working environment of refractory materials is very bad, and the general life expectancy of current materials (including some imported materials) Only 3~4 months, affecting the operation period of the rotary kiln

Method used

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  • Prefabricated part of coal injection pipe head
  • Prefabricated part of coal injection pipe head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, the prefabricated part of the coal injection pipe head, 25 parts of 5-3mm sintered mullite, 28 parts of 3-1mm sintered mullite, 12 parts of 1-0mm sintered mullite, 8 parts of white corundum, 5 parts Silicon carbide, 5 parts of sillimanite, 5 parts of α-alumina micropowder, 4 parts of silicon micropowder, 8 parts of pure calcium aluminate cement, 0.15 part of water reducing agent, 5 parts of water are mixed and stirred evenly, vibrating pouring, after conventional curing and baking use.

Embodiment 2

[0033] Example 2, the prefabricated part of the coal injection pipe head, 28 parts of 5-3mm sintered mullite, 21 parts of 3-1mm sintered mullite, 18 parts of 1-0mm sintered mullite, 5 parts of white corundum, 6 parts Silicon carbide, 5 parts of sillimanite, 6 parts of α-alumina micropowder, 5 parts of silicon micropowder, 6 parts of pure calcium aluminate cement, 0.2 part of water reducer, 6 parts of water are mixed and stirred evenly, vibrating pouring, after conventional curing and baking use.

Embodiment 3

[0034] Example 3, the prefabricated part of the coal injection pipe head, 29 parts of 5-3mm sintered mullite, 22 parts of 3-1mm sintered mullite, 14 parts of 1-0mm sintered mullite, 6 parts of white corundum, 10 parts Silicon carbide, 6 parts of sillimanite, 5 parts of α-alumina micropowder, 4 parts of silicon micropowder, 4 parts of pure calcium aluminate cement, 0.2 part of water reducing agent, 6.5 parts of water are mixed and stirred evenly, vibrating pouring, after conventional curing and baking use.

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Abstract

The invention relates to a prefabricated part of a coal injection pipe head, belonging to the field of refractory materials. The prefabricated part is prepared by the following steps: evenly mixing sintered mullite, white corundum fine powder, carborundum, sillimanite, alpha-alumina micropowder, silica micropowder, pure calcium aluminate cement and water reducing agent, which are crushed to specified granules, with water according to parts by weight; and carrying out vibration casting and conventional curing, and baking. The product has the advantages of high thermal-state strength, high temperature resistance, wear resistance, stable performance, favorable integrity, favorable anti-stripping property, favorable scour resistance and the like. The prefabricated part is directly sheathed onthe coal injection pipe head, and thus, is convenient for construction and maintenance and is safe and reliable, thereby greatly shortening the construction period.

Description

technical field [0001] The invention belongs to the field of refractory materials, and relates to a prefabricated part used for a specific part of a cement kiln, in particular to a prefabricated part at the head of a coal injection pipe. technical background [0002] At present, the coal injection pipe head of the new large-scale rotary kiln is prone to cracking and peeling due to the sudden temperature change of this part and the long-term erosion of the secondary air containing fine clinker particles, and the service life is very short. In the past, coal injection pipes were casted on site using special castables for coal injection pipes. [0003] For example, Chinese patent application CN201010128279.3 discloses a preparation method of a high-performance wear-resistant castable for coal injection pipes. Homogenize the raw materials composed of explosion-proof fiber and water reducing agent, then pour them into the forced mixer for mixing, and naturally maintain them for ...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 刘财军朱华君
Owner 宜兴市泰科耐火材料有限公司
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