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1,Description of Andalusite Mullite Brick for Hot Blast Stove:: heating andalusite to 1300 ℃ will transform mullite phase, enhance the product's resistance to rapid cooling and heating, improve the product's impact resistance and load softening temperature. Hongzhu stone can be directly added without calcination to improve the creep resistance of mullite brick. This kind of composite brick has excellent oxidation resistance, high temperature resistance, spalling resistance, high temperature compressive strength and flexural strength. Therefore, the product is widely used in important areas of kilns.The volume expansion of mullite in the process of mullite formation at high temperature can effectively offset the sintering shrinkage at high temperature, thus making the volume of the product stable. The addition of andalusite at high temperature is transformed into mullite, which improves the content of mullite. At the same time, the interweaved structure formed by needle column mullite improves the thermal shock stability of the product.Andalusite is not completely mullitized, forming a number of composite structures, and the thermal shock stability of the products is improved due to the mismatch of expansion coefficients of various minerals. When andalusite is added into the matrix, the microstructure of knitted mullite interwoven with each other is formed in the matrix after Mullitization of andalusite at high temperature, which can effectively improve the load softening temperature and creep resistance of products.
2,Index of Andalusite Mullite Brick for Hot Blast Stove:
ITEM | JRM-65 | JRM-60 | JRM-57 |
Al2O3 % | ≥65 | ≥60 | ≥57 |
Fe2O3 % | ≤1.0 | ≤1.2 | ≤1.5 |
TiO2 % | ≤0.5 | ≤0.5 | ≤0.6 |
K2O+Na2O % | ≤0.6 | ≤0.6 | ≤0.6 |
Apparent porosity % | ≤22 | ≤22 | ≤22 |
B.D g/cm3 | ≥2.50 | ≥2.45 | ≥2.40 |
Cold crushing strength Mpa | ≥55 | ≥50 | ≥45 |
Reheating linear change % | 1500℃×4h ±0.2 | 1500℃×4h ±0.2 | 1400℃×4h ±0.2 |
Thermal shock resistance 1100℃,water cooling,times | 1500℃×20-50h 0.2 | 1450℃×20-50h 0.2 | 1400℃×20-50h 0.2 |
Refractoriness under load ℃ | ≥1680 | ≥1650 | ≥1600 |
Creep rate(0.2Mpa) % | ＞25 | ≥25 | ≥25 |
3,Performance of Andalusite Mullite Brick for Hot Blast Stove:
1) The product has excellent thermal shock resistance and spalling resistance
2) Low creep rate and good stability at high temperature
3) High temperature, good erosion resistance and wear resistance
4) Strong slag corrosion resistance and atmospheric corrosion resistance
4, Product Usage: Hot blast stove wall, checker brick,furnace top,combustion chamber.
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5.Good feedback of product use effect,the products have been exported toPakistan, Russia, Mexico
6.We are a professional supplier, who can provide customers with free product technology, use and other issues.
Do you want to find a professional supplier of refractory products?
Do you want to find a stable and credible supplier?
Then please contact with us
Contact me:Email:wp@cnjingganrefractory.com/sdwenping@163.com
TEL: 86-0533-4188518 / FAX: 86-0533-4188518
Rose:+86-13275332819(wechat/whatsapp number)
After years' research and development, we adopt advanced technology and techniques to produce a new generation of Alumina Magnesia Carbon Brick for Refining Ladle. Adhering to concept of 'faith first, clients uppermost', our mission is to offer high quality products and more perfect after-sale service at reasonable price. We have been committed to the industry for many years, earnestly promote joint ventures and cooperation with major enterprises and manufacturers to serve the society and users with the idea of industrialization development.
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