A continuous self-toughening nitride-bonded silicon carbide refractory material

A refractory material and nitride technology, which is applied in the field of continuous self-toughening nitride combined silicon carbide refractory materials, can solve the problems of strength attenuation improvement description, etc., so as to improve oxidation resistance and thermal shock resistance, improve service life, High temperature flexural strength effect

Active Publication Date: 2021-06-29
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

All these patents are only limited to the high strength of the original material, without any improvement instructions on the attenuation of the strength of the material during service

Method used

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  • A continuous self-toughening nitride-bonded silicon carbide refractory material

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Experimental program
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Effect test

Embodiment 1

[0017] The design formula of continuous self-toughening nitride junction and silicon carbide is: the proportion of silicon carbide is 82%, the proportion of silicon nitride is 17%, ZrB 2 The ratio is 1%; the apparent porosity of the product is 11.9%, and the bulk density is 2.75g / cm 3 , normal temperature strength 60Mpa, 1200 ℃ high temperature strength 58Mpa, 1200 ℃ heat preservation 30min, air cooling 5 times the residual flexural strength is 54.0Mpa, the strength retention rate is 90%.

Embodiment 2

[0019] The design formula of continuous self-toughening nitride junction and silicon carbide is: the proportion of silicon carbide is 74%, the proportion of silicon oxynitride is 20%, ZrSiO 4 The ratio is 6%. The apparent porosity of the product is 14.0%, and the bulk density is 2.70g / cm 3 , normal temperature strength 55.0Mpa, 1200 ℃ high temperature strength 54.2Mpa, 1200 ℃ heat preservation 30min, air cooling 5 times the residual flexural strength is 57.8Mpa, the strength retention rate is 105%.

Embodiment 3

[0021] The design formula of continuous self-toughening nitride junction and silicon carbide is: silicon carbide ratio 82%, sialon ratio 10%, ZrC+ZrSiO 4 The proportion is 8%. The apparent porosity of the product is 15.2%, and the bulk density is 2.64g / cm 3 , normal temperature strength 50.0Mpa, 1200 ℃ high temperature strength 48.0Mpa, 1200 ℃ heat preservation 30min, air cooling 5 times residual flexural strength is 52.8Mpa, strength retention rate is 110%.

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Abstract

The invention relates to a refractory material for a dry quenching furnace, in particular to a continuous self-toughening nitride-bonded silicon carbide refractory material. A continuous self-toughening nitride-bonded silicon carbide refractory material is proposed. Zirconium-containing substances are introduced into the nitride-bonded silicon carbide refractory material; silicon carbide is the main crystal phase, nitride is the binding phase, and zirconium-containing substances are dispersed in nitrogen. In the compound bonding phase; the content of nitride in the continuous self-toughening nitride bonded silicon carbide refractory material is 10-25%, the content of zirconium-containing substances is 1-8%, and the content of silicon carbide is 70-82%. The invention makes full use of the properties of the nitride-bonded silicon carbide refractory material being normal and high-temperature flexural strength, improves its oxidation resistance and thermal shock resistance, improves the integrity of the furnace body, and increases the service life of the furnace body.

Description

technical field [0001] The invention relates to a refractory material for a CDQ furnace, in particular to a continuous self-toughening nitride-bonded silicon carbide refractory material, the continuous self-toughening nitride-bonded silicon carbide refractory material is used for the corbel in the chute area of ​​a CDQ furnace Key refractory materials for pillars, beams and other parts. Background technique [0002] CDQ technology has the advantages of water saving, less air pollutant emissions, high energy efficiency, and improved coke quality. It is a key energy-saving and environmental protection technology promoted by the country, and it has developed rapidly in my country in recent years. With the improvement of the structural design level of the design institute (including the adoption of double chute technology, heat transfer behavior simulation research, etc.), the localization of supporting equipment and the improvement of related industrial foundations, the increas...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B35/565C04B35/66C04B38/00C10B39/02
CPCC04B35/565C04B35/66C04B38/00C04B2235/3248C04B2235/3813C04B2235/3869C04B2235/3873C04B2235/77C04B2235/96C04B2235/9607C04B2235/9684C10B39/02C04B38/0074
Inventor曹会彦吕春江黄志刚李杰吴吉光张新华黄一飞
OwnerSINOSTEEL LUOYANG INST OF REFRACTORIES RES