At present, we have established extensive business relationships with many domestic and foreign 1300? Honeycomb ceramic, Alumina Ceramic Grinding Ball, Dry-type castable production plant enterprises. Our company takes customer satisfaction, high quality, all staff cooperation, enterprising innovation as the company's business policy, and achieves the harmonious unity of customers, staff, company and society as the goal. Our company has a professional management and R&D team, and the product quality is among the best in the industry. The products are sold all over the country and exported to many countries and regions. Through long-term tracking and research on new technologies and new customer needs in the industry, we have developed technology research and development directions that are close to the needs of customers.
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)
Honesty is the foundation of being a human being, the foundation of the survival and development of an enterprise, and the first consideration in supervising our production of each Refractory 65% High Alumina Brick for Hot Blast Furnace. With the change of market demand, the speed of new product updating is speeding up and the delivery time required by users is getting shorter and shorter. We have a group of professional and dedicated technical and management backbones, which have laid a solid foundation for the company's continuous progress.
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