Highly heatproof and shockproof mullite-cordierite refractory composition

A cordierite and mullite technology is applied in the field of high thermal shock resistance refractory materials for ceramic burners of iron-making hot blast stoves, which can solve the problems of poor thermal shock resistance and short service life, and improve the thermal shock resistance and service life. The effect of prolonged, excellent overall performance

Active Publication Date: 2007-09-19
宜兴市宝欣耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the refractory composition has a relatively high (60Mpa) compressive strength, its thermal shock resistance is extremely poor, only 15 times / 1100 water cooling, so its service life is shorter

Method used

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Examples

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Embodiment Construction

[0020] Example: according to the ratio of the example, weigh the corresponding materials, first pre-mix the fine powder less than 180 mesh, then add the granular material for wet mixing, mix the material for about 8 hours, put it into the mold for pressure molding, and heat it at 1380°C ×8h high temperature firing to make it fully sintered.

[0021] Physical and chemical indicators

[0022]

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PUM

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Abstract

The invention relates to a fire resistive material for ceramic burner of iron-smelting hot-blast stove, which mainly comprises 30-50 wt% of synthesized mullite, 15-25 wt% of synthesized cordierite, 10-20 wt% of sillimanite, 5-7% of andalusite, 5-10 wt% of alpha-alumina ultramicro powder and 4-6 wt% of clay.

Description

technical field [0001] The invention relates to a refractory material, in particular to a high thermal shock refractory material for a ceramic burner of an ironmaking hot blast stove. Background technique [0002] The operating temperature of ironmaking hot blast stoves in steel mills is around 1200-1350°C all year round, and the process of supplementing cold air makes the temperature in the furnace change drastically, and it needs to withstand harsh conditions such as chemical erosion of dust brought in by blast furnace gas, strong erosion of combustion gas, and mechanical loads. It is required that refractory materials for ceramic burners of hot blast stoves not only have the characteristics of small creep, high load softening temperature and large heat capacity of ordinary refractory materials, but also require good thermal shock resistance and high strength. [0003] In the prior art, the main crystal phase is high-alumina cordierite refractory material, which is compose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/18C04B35/66
Inventor 王国洪吴跃锋徐玉平殷俊峰
Owner 宜兴市宝欣耐火材料有限公司
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