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  • Electrocast Alumina Block Alpha Beta Refractory Brick as Container Glass Lip Block

Electrocast Alumina Block Alpha Beta Refractory Brick as Container Glass Lip Block

Catalog: Fused cast α-β block | 2022-02-07

Alpha beta alumina is produced from alpha alumina and beta alumina crystals with the compact structure in a most proper rate. In contat with molten glass, Alpha beta alumina barely produces any blistering or stones. Because of that reason, alpha beta alumina blocks may be widely used in glass contact end zones of furnaces when glass quality is the priority.

Product Details

Alpha Beta Alumina block for glass fusing kiln stout brick, lip brick, gate brick

Fused corundum bricks are made by melting alumina in an electric arc furnace and casting them into a model of a specified specific shape, annealing and heat preservation, and then processing diamond abrasive tools to obtain the desired product.

This product is divided into 3 types according to the different crystal forms and quantity of alumina. The first type is α-Al2O3 as the main crystal phase, called α corundum brick; the second type is α-Al2O3 and β-Al2O3 The main crystal phase, the content is basically 1:1, the α phase content is slightly higher, called α, β corundum brick; the third type is mainly β-Al2O3 crystal phase, called β corundum brick.

Specification


Alpha Beta Alumina block for glass fusing kiln stout brick, lip brick, gate brick

The fused cast corundum brick has good high temperature volume stability and corrosion resistance. 

The structure of α-Al2O3 fused cast bricks is dense and has certain resistance to glass melt erosion and erosion resistance. 

β-Al2O3 fused cast bricks contain almost no glass phase, basically no shrinkage cavity, good thermal shock resistance, and high temperature resistance to alkali vapor stability.

α-β Al2O3 fused cast bricks have the characteristics of α-Al2O3 and β-Al2O3 fused cast bricks. The main crystal phases are directly combined, and the composition contains only a small amount of glass phase. The crystal structure is compact, the porosity is low, the high temperature wear resistance is good, the mechanical strength is high, and it has good high temperature resistance to alkali vapor stability.

Item
Fused Cast Alumina
Fused Cast Alumina
Fused Cast Alumina
α-β Alumina
α-Alumina
β-Alumina
Chemical Composition
Al2O3
94
98.5
92
SiO2
1
0.4
-
NaO2
4
0.9
6.5
Other oxides
1
0.2
1.5
Crystallograghic
α-Al2O3
44
90
-
Analysis %
β-Al2O3
55
4
99

Glass Phase
1
6
1