Henan Hongtai Kiln Refractory Co.,Ltd.
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Jm23 Jm26 Jm28 Heat Resistant Light Weight Refractory Thermal Insulation Mullite Brick
Description of Mullite Insulation Refractory Brick
The Mullite Insulation fire bricks adopts imported plate corundum and high purity fused alumina as the main raw materials. It is made of high temperature shuttle kiln through mixing, drying and forming with advanced superfine powder addition technology.Mullite lightweight bricks are widely used in residue gasifier, synthetic ammonia converter, carbon black reactor and refractory kiln.The dimensions, physical and chemical indexes and service life of the products all meet the requirements of customers.
Features of Mullite Insulation Refractory Brick
Application: it is suitable for heat surface lining and backing lining of various industrial furnaces in metallurgy, petrochemical, building materials, ceramics, machinery and other industries.For example, cracking furnace, conversion furnace, heating device, refining device, regenerating device, hot air furnace, heating furnace, heat equalizing furnace, heat treatment furnace, resistance furnace, tunnel kiln, roller kiln, bell jar kiln, glass pond kiln, etc.
1. High purity and low impurity content.
2. Low heat conduction and low heat capacity.
3. High strength and excellent thermal shock resistance.
4. High temperature resistance, direct contact with flame.
Application: it is suitable for heat surface lining and backing lining of various industrial furnaces in metallurgy, petrochemical, building materials, ceramics, machinery and other industries.For example, cracking furnace, conversion furnace, heating device, refining device, regenerating device, hot air furnace, heating furnace, heat equalizing furnace, heat treatment furnace, resistance furnace, tunnel kiln, roller kiln, bell jar kiln, glass pond kiln, etc.
High temperature Mullite Insulation Refractory Brick
Physical and Chemical Indexes of Mullite Insulation Refractory Brick
| Item | JM23 | JM 26 | JM28 | JM 30 |
| Chemical Composition (%) | ||||
| Al2O3 | 42 | 56 | 67 | 73 |
| SiO2 | 55 | 41 | 30 | 24 |
| Fe2O3 | ≤1 | ≤0.8 | ≤0.7 | ≤0.7 |
| K2O + Na2O | 1.1 | 1.7 | 1.7 | 1.7 |
| Physical Properties | ||||
| Density (g/cm3) | 0.6 | 0.8 | 0.9 | 1 |
| Classification Temperature (°C) | 1300 | 1400 | 1500 | 1550 |
| Cold Crushing Strength (MPa) | 1.2 | 1.8 | 2.5 | 3.3 |
| Modulus of Rupture (MPa) | 1 | 1.7 | 2.3 | 3.1 |
| Permanent Linear Change (%) x 24hrs | ≤0.6 | ≤0.6 | ≤0.8 | ≤0.9 |
| Thermal Expansion (%) 1000°C | 0.5 | 0.52 | 0.52 | 0.53 |
| Thermal Conductivity (W/m.k) | ||||
| 350°C | 0.18 | 0.25 | 0.33 | 0.38 |
| 400°C | 0.2 | 0.29 | 0.35 | 0.4 |
| 600°C | 0.24 | 0.32 | 0.37 | 0.42 |
Use of Mullite Insulation Refractory Brick
Mullite Insulation Refractory Brick is high-alumina refractory materials with mullite (3Al2O3·2SiO2) as the main crystal phase. Generally, the alumina content is between 65% and 75%. In addition to mullite, the mineral composition with lower alumina also contains a small amount of glass phase and cristobalite; the higher alumina content also contains a small amount of corundum.
Mullite Insulation Refractory Bricks can be used at temperatures ranging from 1300°C to 1600°C with different materials. The body density can be between 0.5 0.6 0.8 0.9 1.0 1.2 1.5 according to user requirements. It acts on high-temperature kilns and directly touches the flame. Features high compressive strength and low thermal conductivity. It is suitable for the insulation of electric kilns, various high-temperature rotary kilns, tunnel kilns, nitrogen gas kilns, etc. The crystallization of fused mullite is larger than that of sintered mullite, and its thermal shock resistance is better than that of sintered products. Their high temperature performance mainly depends on the content of alumina and the uniformity of mullite phase and glass distribution. Mullite bricks are mainly used for hot blast stove top, blast furnace body and bottom, glass melting furnace regenerator, ceramic sintering kiln, dead corner lining of petroleum cracking system, etc.
Packing of Mullite Insulation Refractory Brick
1.on wooden pallets with plastic cover: wooden pallet size :930*930 or 1000*1000mm,
2.Load weight of each pallet: 1.5-2.0 tons,
3.230*114*65mm:512PCS/Pallet, 230*114*75mm:448PCS/Pallet.
Shipping of Mullite Insulation Refractory Brick
1.Our packaging is as per customer’s request
2.Normal goods delivered by sea transport
3.Sample shipping by express
4.We will shipping and delivery goods timely, quanlity and quantity guaranteed, and also in accordance with the contract and customer's requirment completely.
