15 мая 2015 года в15.05.2015 09:38 1 0 10 1

Features Of Fused Cast Alumina Blocks

Fused cast Alumina block is made by fusing a mass of Alumina raw material of the desired composition to the molten condition, casting the fused material while molten into suitable molds, and cooling the cast material under controlled conditions to form a monolithic article of desired size and shape. Fused Cast Alumina are perfect complements to the AZS range for sensitive applications.

Fused cast Alumina blocks are available in 3 types: Alpha-Beta Fused cast Alumina Block, Alpha fused cast alumina block and Beta fused cast alumina block.

Alpha-Beta Fused cast Alumina Block is formed by the compact structure of approximately 50% alpha alumina and 50% beta alumina crystals respectively in a most ideal proportion, where intertwined crystals of both materials result in a very dense structure. It has excellent corrosion resistance against molten glass and great performance against contamination to molten glass, thus it is very suitable for paving blocks and fore-hearth channel blocks.

When in contact with molten glass, it barely produces any blistering or stones. So, Alpha-Beta alumina blocks may be widely used in working tank, feeder channels, superstructures and lipstone, etc. In general, in soda-lime container furnaces Alpha-Beta alumina fused-cast is installed in the Alcove and channel areas, as alternative to AZS fused-cast for Alcoves and as alternative to AZS fused-cast, sintered alumina and other sintered refractories for channels.

Alpha fused cast alumina block 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. It is also an ideal material for Metallurgical Titanium Furnace because the superior thermal stability.

Beta fused cast alumina block comprises of a majority of 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, feeder channel, ect.

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.

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