The "Jun" brand fused mullite main raw materials are industrial alumina and high-quality quartz sand, which is smelted by large high-temperature electric arc furnaces. Fused mullite is the only stable binary compound in alumina-silica dual system. It is a high-quality refractory material. The colors are gray -white, needle-shaped, cylindrical crystals, and high bending strength. It has the characteristics of uniform expansion, good thermal shock stability, highly refractoriness under load, small high temperature creep value, high hardness, good anti -chemical corrosion etc. With its excellent heat shock resistance and abrasion resistance, it is widely used in glass kiln body furnace lining bricks, alkaline -free glass sedimentation tank mullite bricks, large smelting blast furnace hot air furnace bricks, blast-furnace low creep sillimanite brick, ceramic kiln furniture, saggar, petrochemical and other industries are raw materials for high-end refractory materials.
Physical Properties and Chemical Composition
| Item |
Standard |
| Composition(%) |
Guarantee value |
Typical value |
| Al₂O₃ |
72~76 |
74.10 |
| SiO₂ |
23~27 |
25.08 |
| Fe₂O₃ |
≤0.10 |
0.05 |
| R₂O |
≤0.50 |
0.18 |
| Mullite phase (%) |
≥93 |
| Glass phase(%) |
≤7 |
| Coefficientof linear expansion(1/℃) |
-6.0x10 -6 |
| Bulk density(g/cm3) |
≥2.9 |
| Particle size |
0~1~3~5~8mm,180 mesh、200mesh、240 mesh、325 mesh |
| Inspection standard |
GB/T21114-2007;GB/T2999-2002 |
| Packing |
Inner plastic and external weaving 25KG/bag(can be customized according to customer requirements) |
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