Cement kiln coal injection pipe castable

A coal-injection pipe and castable technology, which is applied in the field of high-temperature and alkali-resistant building materials, can solve problems such as short service life, and achieve the effects of improved service life, good stability, and high refractoriness

Active Publication Date: 2009-08-26
ANHUI NINGHUO NEW MATERIAL
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Problems solved by technology

[0004] The purpose of the present invention is to provide a castable for cement kiln coal injection pipes, which uses high-purity aluminum-magnesium spinel as the main raw material, pure calcium aluminate cement as the binder, alumina superfine powder as the additive, and supplemented with composite properties Regulators and multiphase tougheners to solve the problem of short service life caused by traditional technologies

Method used

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  • Cement kiln coal injection pipe castable
  • Cement kiln coal injection pipe castable

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Experimental program
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Embodiment Construction

[0024] For cement kiln coal injection pipe castables, the weight percentage of each raw material component is:

[0025] Raw material name Particle size Weight percent

[0026] Spinel particles 5-8mm 20-25%

[0027] Spinel particles 3-5mm 20-30%

[0028] Spinel particles 1-0mm 20-25%

[0029] Spinel fine powder <0.045mm 8-15%

[0030] Aluminum oxide powder 3-5μm 7-10%

[0031] Alumina micropowder<2μm 1-4%

[0032] Magnesium oxide powder <0.088mm 2-4%

[0033] Pure calcium aluminate cement 6-10%;

[0034] The amount of admixture added is:

[0035] Polyphosphate 0.1%

[0036] Polyethylene glycol 0.08%

[0037] Polycarboxylate ether 0.03%.

[0038] The performance comparison between the present invention and similar products at home and abroad is shown in Table 1

[0039]

[0040]

[0041] It was tested on the coal injection pipe of the cement kiln with a daily output of 4,000 tons in Ningguo Cement Plant. Before pouring, the mold was pre-painted with butter, and ...

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Abstract

The invention provides a cement kiln coal injection pipe castable, which adopts high purity aluminium magnesium spinel as main raw material, selects pure calcium aluminate cement as bonding agent, alumina superfines as additive. The invention integrates the advantages of high refractoriness, high resistance to thermal shocks, high strength and abrasion resistance, meanwhile the service life can break down the record of the 4 month of the external product and exceed 8 month.

Description

technical field [0001] The invention relates to the field of high-temperature and alkali-resistant building materials, in particular to a castable for cement kiln coal injection pipes. Background technique [0002] In recent years, my country's building materials industry has developed rapidly, and the demand for cement is increasing day by day. In the large-scale cement dry process production line, the coal injection pipe and the refractory material at the kiln mouth are the key points, which are crucial to the continuous and normal operation of the cement kiln. A complete set of imported cement kiln equipment and castables for coal injection pipes have a very short service life. Japan announced that the coal injection pipes have the shortest service life of refractory materials used in cement kilns, generally only about 4 months, which caused the kiln to stop. the main reason. [0003] The working environment of the coal injection pipe is the harshest, and the requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/443C04B7/32
Inventor 罗明汪政南郭兴志于明武黄君
Owner ANHUI NINGHUO NEW MATERIAL
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