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Vermiculite Insulation Board

Vermiculite insulation board for the aluminum industry

Using vermiculite as the main material, it is specially developed for the aluminum industry, especially for the electrolytic aluminum tank. The use temperature is as high as 1050℃. In the high temperature working environment, the organic impurities in the vermiculite board will be removed to achieve the purification effect. The use process will increase the strength of the vermiculite insulation board, reduce the thermal conductivity, and improve the quality.


Because of this feature, the aluminum tank has a service life of more than 10 years. The maintenance cost of the electrolytic aluminum tank can be greatly reduced. At the same time, its low thermal conductivity can effectively reduce the heat loss of the electrolytic aluminum tank and achieve the effect of saving electricity and energy.

With formula and processing technology, the vermiculite refractory insulation board can effectively resist the penetration of fluoride and cryolite, and will not be wetted by molten aluminum.
It can be used alone or in combination with other products as a backing insulation board for electrolytic aluminum tanks, or as a hot surface insulation board to cover the electrolytic aluminum tanks.

It can be used in the secondary aluminum industry, for example, as a backing board for the furnace wall of a holding furnace, or as a backing board for a launder or a roof.

Items MA-130
Al2O3 (%) ≥20
SiO2 (%) ≥30
MgO (%) ≥13
Fe2O3 (%) ≤5.5
TiO2 (%) ≤1.5
Linear Shrinkage Change on Reheating 1000°C/12hrs (%) ≤1.5
Bulk Density (g/cm3) ≤1.35
Cold Crushing Strength (Mpa) ≥8.5
Cold Rupture Strength (Mpa) ≥2.2
Thermal Conductivity (W/m.K) 200°C ≤0.20
400°C ≤0.22
600°C ≤0.25
800°C ≤0.30
Maximum Service Temperature °C 1050
Continuous Service Temperature °C 1000
Available Size,mm 1000x600x40
300x300x20
308x308x20
Applications aluminum electrolysis cells

vermiculite insulation board5 1

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