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Low-calcium aluminate cement fireproof pouring material applied to pulverized coal boiler

A low-calcium aluminate, refractory castable technology, applied in the field of boiler refractory materials, can solve the problems of short service life and maintenance cycle, high cost of refractory materials, and achieve the effects of long service life, good refractory performance and low cost

Inactive Publication Date: 2016-07-27
WUXI XINENG BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a low-calcium aluminate cement refractory castable for pulverized coal boilers to solve the problems of high cost, short service life and short maintenance period of boiler refractory materials in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Binder: 30kg of low-calcium aluminate cement with label No. 32.5;

[0021] Aggregate: 30kg of fine aggregate with a particle size of less than 4.5mm, 20kg of fine aggregate with a particle size of 7mm-10mm, and 25kg of fine aggregate with a particle size of 16mm-18mm;

[0022] Powder: 10kg of powder with a particle size of 0.06mm-0.1mm, 20kg of powder with a particle size of less than 0.06mm.

[0023] According to the water-cement ratio of 0.5, add water and mix well.

Embodiment 2

[0025] Binder: 27kg of low-calcium aluminate cement with label No. 32.5;

[0026] Aggregate: 27kg of fine aggregate with a particle size of less than 4.5mm, 23kg of fine aggregate with a particle size of 7mm-10mm, and 23kg of fine aggregate with a particle size of 16mm-18mm;

[0027] Powder: 12kg of powder with a particle size of 0.06mm-0.1mm, and 17kg of powder with a particle size of less than 0.06mm.

[0028] According to the water-cement ratio of 0.5, add water and mix well.

Embodiment 3

[0030] Binder: 25kg of low-calcium aluminate cement with label No. 32.5;

[0031] Aggregate: 25kg of fine aggregate with a particle size of less than 4.5mm, 25kg of fine aggregate with a particle size of 7mm-10mm, and 20kg of fine aggregate with a particle size of 16mm-18mm;

[0032] Powder: 15kg of powder with a particle size of 0.06mm-0.1mm, and 15kg of powder with a particle size of less than 0.06mm.

[0033] According to the water-cement ratio of 0.5, add water and mix well.

[0034] The refractory performance of the castable is good, in addition to being suitable for the refractory layer of various parts of the pulverized coal boiler, it can also be used for the nozzle of the burner, and has a long service life; at the same time, the source of raw materials is wide and the cost is low.

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PUM

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Abstract

The invention discloses a low-calcium aluminate cement fireproof pouring material applied to a pulverized coal boiler. The low-calcium aluminate cement fireproof pouring material is prepared from the following components in parts by weight: an adhesive, an aggregate and powder, wherein the adhesive comprises 25-30 parts of NO.32.5 low-calcium aluminate cement with a water-cement ratio being 0.5; the aggregate comprises 25-30 parts of a fine aggregate with particle size being smaller than 4.5mm, 20-25 parts of a fine aggregate with particle size being 7mm-10mm and 20-25 parts of a fine aggregate with particle size being 16mm-18mm; the powder comprises 10-15 parts of powder with particle size being 0.06mm-0.1mm and 15-20 parts of powder with particle size being smaller than 0.06mm. The pouring material is high in fire resistance, long in service life, wide in raw material sources and low in cost, and can be applied to fireproof layers of all parts of the pulverized coal boiler and can also be applied to a burner nozzle.

Description

technical field [0001] The invention relates to a boiler refractory material, in particular to a low-calcium aluminate cement refractory castable for a pulverized coal boiler. Background technique [0002] Refractory materials are an important part of boilers, which are used to isolate the flame and heating surfaces in the boiler combustion chamber from the outside world. Therefore, the refractory materials used are required to have good high temperature resistance, heat insulation performance and sealing performance. The service life of refractory materials directly affects the combustion efficiency, safety and service life of the boiler. At present, boiler refractory materials in the industry generally have problems of high cost, short service life and short maintenance period. Therefore, providing a boiler refractory material capable of high temperature resistance and long service life is a problem worth studying in the industry. Contents of the invention [0003] The...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 梁古轩
Owner WUXI XINENG BOILER