Excellent first' in mind, we operate closely with our customers and supply them with efficient and expert services for Large Size Graphite Electrode, Zirconium Containing Ceramic Fiber Paper, Quartz Nozzle Brick. In terms of customer service, we are adhering to the service concept of serving customers wholeheartedly to create a comprehensive, interactive and one-stop service experience and continue to expand new areas of customer value added. We have professionals with more than ten years of experience in design, development and on-site production management, able to provide various technical services. We work closely with the main technical teams and have had good cooperation relationships with exceptional companies in the industry for a long time. The company attaches great importance to the investment in scientific research, and we have a well-equipped testing center and perfect production equipment.
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)
Our company has always been product quality-oriented, serving customers, focusing on the development, production and sales of 30mm, 40mm, 50mm, 60mm High Alumina Refractory Ball. With the business philosophy of 'professionalism, rigor, innovation and excellence', as well as the excellent management team, we continue to maintain a stable and rapid growth momentum and become the new leading brand in the industry. We hope to establish a long-term friendship based on equality and mutual benefit.
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