We are committed to the research, production and sales of Castable For Inner Lining, Polyester Fiber Sound Absorbing Board, Carbon Brick. We are based on honesty cherishing the hard-won honors, and sincerely thank friends and customers from all walks of life for their long-term care and support. Our company has standardized and professional production management processes from the conception, production and processing, quality inspection and business management systems. We will continue to produce more new products suitable for the market, accelerate the response speed of comprehensive solutions for the special needs of industry users, and provide customers with more added value.
1,Product description:
Sintered mullite bricks made from synthetic calcined mullite are widely used in high-grade kilns such as hot blast stoves and blast furnaces because of their excellent suddenly-changing temperature resistance,good wear resistance, low creep rate performance and low reburning line change rate.
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2,Index of Mullite Brick for Hot Blast Furnace:
Item | JM-65 | JM-70 | JM-80 |
Al2O3 % | 65 | 70 | 80 |
Fe2O3 % | 1.5 | 0.5 | 0.5 |
Refractoriness ℃ | 1790 | 1790 | 1850 |
Apparent porosity % | 24 | 20 | 21 |
Bulk density g/cm3 | 2.5 | 2.55 | 2.7 |
Cold crushing strength Mpa | 60 | 65 | 75 |
Refractoriness under load T2,℃ | 1550 | 1700 | 1700 |
Reheating linear change % | 1400℃×2h ＋0.2～-0.1 | 1450℃×2h ＋0.2～-0.1 | 1500℃×4h ＋0.2～-0.1 |
Creep rate 0.2MPa×50h,% | 1350℃,0.8 | 1450℃,0.6 | 1500℃,0.6 |
Thermal shock resistance, times | 30 | 25 | 20 |
3,Knowledge of Mullite Brick for Hot Blast Furnace:Alumina content of products is generally 65-75%, mineral composition is mainly mullite phase, a small amount of corundum phase, glass phase.Refractoriness is greater than 1790℃, refractoriness under load is greater than 1550 ~ 1700 ℃.The products are divided into sintered mullite bricks and fused mullite bricks according to different production processes, according to the difference of alumina, it can be divided into three grades: JM-65, JM-70 and JM-80.The crystallization of fused mullite brick is larger than that of sintered mullite brick, and its thermal shock resistance is better than that of sintered product. The products are mainly used in hot blast stove, blast furnace, regenerator of glass furnace, petroleum cracking equipment, dry quenching coke oven, etc.
4,Main features of Mullite Brick for Hot Blast Furnace:
1, High refractoriness, ＞1790℃
2,High refractoriness under load, 1550~1700℃。
3, The creep rate at high temperature is low, 1500℃×25-50h,≤0.6%
4, Good thermal shock resistance, 1100℃, water cooling, > 20 times.
5, Good corrosion resistance of acid-resistant slag
5,Factors influencing the properties of mullite bricks:
1, The Value of Al2O3/SIO2 in Products
2, Types and Contents of Impurities in raw materials
3, Particle size of raw materials, firing temperature and holding time of products
6,Cautions in the use of Mullite Bricks
1,Contact with alkaline substances is prohibited in high temperature environment
2, It is not suitable to use in high water vapor content environment.
7.Good feedback of product use effect,the products have been exported to Australia, Oman,Kenya,and India.
8.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)
In order to continue to strengthen our Mullite Brick for Blast Furnace, Hot Blast Stove, Glass Furnace and deliver more sophisticated features and performance, we are harnessing some of the latest technological improvements. We will try our best to develop various undertakings in order to build a vibrant and prosperous society. Our company has become an enterprise with good influence by establishing a win-win independent operation mode. Internally, we are committed to improving the service quality. Externally, we build an open platform.
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