Applications of Fused Cast Alumina Block in Glass Industry

Fuse cast alumina block is a kind of pure alumina block containing over 90% Al2O3 which has excellent resistance against acid slag and chemical corrosion. Its good resistance to alkali vapors makes it the best choice for the downstream part of superstructures of glass furnaces.

 

Fused cast Alumina block has dense structure, which does not contaminate glass melting liquid, and excellent corrosion resistance of glass melting liquid below 1350 ℃.Unlike Fused Cast AZS blocks, it can retain most of their room temperature strength at service temperature. 
 

Fused cast Alumina block is available in 3 types : Alpha-Beta, Alpha and Beta (almost 100% beta alumina crystal). 

Alpha-Betablock is formed by the compact structure of approximately 50% alpha alumina and 50% beta alumina crystals respectively in a most ideal proportion. It has excellent corrosion resistance against molten glass and great performance against contamination to molten glass. When in contact with molten glass, it barely produces any blistering or stones.It may be widely used in forehearths, refiners, working tank, feeder channels, superstructures, spouts and working ends and lipstone, etc. 

Alpha block consists of almost 100% alpha alumina crystal. It is an ideal product for the lower temperature zones of the glass melting furnaces due to its high density, superior corrosion resistance and low blister potential. 

Beta block comprises of almost 100% Beta alumina crystals and a slight portion of Alpha alumina crystals in compact structure. Moreover, the intersected texture of large Beta alumina ensures great dimensional stability and great resistance against spalling. Its property of base saturation enables a higher resistance to alkali vapor, thus it has excellent thermal shock resistance and does not form molten droplets. It is the best material for molter crown, port crown, breast wall,Port mouth and feeder channel of glass furnaces.

 

Fused cast Alumina blocks are the typical glass contact materials for the end zones of furnaces when glass quality is the priority : TV Glass, high quality container glass, float glass. Its neutrality against alkali vapors makes it the best choice for the downstream part of superstructures in demanding applications.