High-wear-proof high-thermal-shock-resistant fire-proof material and prefabricated furnace mouth part made from same

A technology of refractory materials and thermal shock resistance, applied in the field of refractory materials, can solve problems such as furnace wall wear and damage, and achieve the effects of high thermal shock resistance, high thermal shock resistance, and strong wear resistance

Active Publication Date: 2013-12-11
PUYANG REFRACTORIES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another technical problem to be solved by the present invention is that in the prior art, the material dust is easy to cause wear to the furnace wall through the splicing gap,...

Method used

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  • High-wear-proof high-thermal-shock-resistant fire-proof material and prefabricated furnace mouth part made from same
  • High-wear-proof high-thermal-shock-resistant fire-proof material and prefabricated furnace mouth part made from same
  • High-wear-proof high-thermal-shock-resistant fire-proof material and prefabricated furnace mouth part made from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 0.5-1mm tabular corundum 53kg, 100 mesh white corundum powder 12kg, 2μm alumina ultrafine powder 10kg, 1μm silicon micropowder 5kg, 80μm andalusite powder 5kg, 150 mesh sillimanite powder 10kg, calcium aluminate cement 5kg After mixing evenly, add water and fully stir, and then place it in a furnace mouth preform mold with a vibrating rod to vibrate and shape. After curing for 2 days at room temperature and 90% humidity, the moldings are kept at a constant temperature of 150 °C for 24 hours and a constant temperature of 315 °C in turn. 12h, 540°C constant temperature for 8h, 900°C constant temperature for 12h and 1400°C constant temperature for 6h, and finally cooling at a speed of 20°C / h to obtain furnace mouth prefab 1.

Embodiment 2

[0047] 67kg of 0.6-1.2mm tabular corundum, 6kg of 150-mesh white corundum powder, 5kg of 3μm alumina ultrafine powder, 3kg of 1.5μm silicon micropowder, 10kg of 80μm andalusite powder, 6kg of 100-mesh sillimanite powder, calcium aluminate After 3kg of cement is evenly mixed, add water and stir well, and then place it in a furnace mouth prefabricated mold with a vibrating rod to vibrate and shape. ℃ constant temperature for 12h, 540 ℃ constant temperature for 8 hours, 900 ℃ constant temperature for 12 hours and 1400 ℃ constant temperature for 6 hours, and finally the furnace mouth prefab 2 is obtained by cooling and cooling at a speed of 20 ℃ / h.

Embodiment 3

[0049] 65kg of 0.5-1.2mm tabular corundum, 11kg of 130-mesh white corundum powder, 8kg of 2μm alumina ultrafine powder, 4kg of 2μm silicon micropowder, 4kg of andalusite powder of 100μm, 4kg of 400-mesh sillimanite powder, calcium aluminate cement After 4kg is evenly mixed, add water and stir well, and then place it in a furnace mouth preform mold with a vibrating bar to vibrate for molding. After curing for 2 days at room temperature and 90% humidity, the molded product is kept at a constant temperature of 150 °C for 24 hours and 315 °C in turn. Constant temperature for 12h, constant temperature at 540°C for 8h, constant temperature at 900°C for 12h, and constant temperature at 1400°C for 6h, and finally cooling at a rate of 20°C / h to obtain furnace mouth prefab 3.

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Abstract

The invention discloses a high-wear-proof high-thermal-shock-resistant fire-proof material which comprises the following raw materials in percentage by weight: 53-67% of tabular corundum, 6-12% of white corundum powder, 5-10% of superfine aluminum oxide powder, 3-5% of superfine silica powder, 4-10% of sillimanite powder, 4-10% of andalusite powder, 3-5% of calcium aluminate cement, 6-12% of silicon carbonate powder and 2-8% of aluminum phosphate. The obtained fire-proof material has the advantages of high wear resistance and high shock resistance, and is suitable for making a prefabricated part of a furnace mouth, especially a coal falling mouth of an electric circulating fluidized bed boiler. Meanwhile, the invention further provides a structure of a prefabricated furnace mouth part to solve the problems that conventional prefabricated parts are not tightly spliced, and dust and heat can easily damage the furnace wall through seams, and the structure of the prefabricated furnace mouth part is especially suitable for making a prefabricated coal falling mouth part of the electric circulating fluidized bed boiler.

Description

technical field [0001] The invention relates to a refractory material with good wear resistance and thermal shock resistance, and a furnace mouth prefabricated part made of the refractory material, belonging to the technical field of refractory materials. Background technique [0002] Refractory materials are often used to make boiler or kiln linings. Among them, since materials frequently enter and exit the furnace body through the furnace mouth, the scouring and wear force of the materials on the furnace mouth is large, so the furnace mouth linings are made of high wear-resistant refractory materials; and Since the furnace mouth is close to the external environment, the temperature in the furnace mouth fluctuates greatly, and the thermal shock effect caused by the temperature fluctuation can easily lead to cracks, material peeling and even collapse of the furnace mouth lining. Therefore, the industry also requires the furnace mouth lining The thermal shock resistance of ref...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 贺中央齐进史国冬周学军张厚兴刘国威孙荣海何自战
Owner PUYANG REFRACTORIES GRP CO LTD
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