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AC-H（Fused cast β - alumina block）

AC-H (Fused Cast β Alumina Block) is formed by a majority of beta alumina crystals

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Fused cast alumina

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Introduction

AC-H (Fused Cast β Alumina Block) is formed by a majority of beta alumina crystals and a slight portion of alpha alumina crystals in compact structure. Its property of base saturation enables a higher resistance to alkali vapor and it has excellent thermal shock resistibility and does not form molten droplets in campaign. AC-H (Fused Cast β Alumina Block)  is the best material for melter crown, port crown and channel, etc. 

 

Typical Chemical Composition: 
Al2O3 92%        
NaO2   7%        
others 1%

Typical Crystallographic Analysis: 
alpha alumina  2%  
beta alumina  98%   

Typical Physical Properties：

Item    Value
 True Specific Gravity   3.26g/cm3
Refractoriness Under Load    （0.2MPa）   1700 ℃
Cold Crushing Strength   60MPa
Anti-erosion velocity of glass liquid under static state   0.3mm/24h
Bulk density PT 2.8 g/cm3
WS 3.1 g/cm3

Casting Technology
PT ：  Big Crown, Port Crown etc. Superstructure，Cover of Channel 
WS ：Big Crown, Port Crown etc. Superstructure，Cover of Channel 

 

Normal Cast

Some shrinkage voids are formed under the casting scar in the annealing process.The blocks(PT)having such voids are usually installed and used in the area with no serious corrosion and the surface with scar is not used as working face,considering no influence for furnace performance and life.

 

Void Free Cast

Casting is performed with a large header in which most of the voids are concentrated.The header is subsequently cut off after cooling.The resultant block is compact and substantially void-free.AC-41 and AC-M are preferably in WS casting.

 

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AC-H（Fused cast β - alumina block）

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