WAM® AL II HD; High Density

There are a few process vessel areas where the micro-porous nature of the WAM® AL II and the resulting lack of abrasion resistance can be problematic. These areas are molten stream impact areas and hearths where solid metal, such as sows, are sweated, areas where high velocity gases are present, impact areas in loading stack melters or other scrap impact zones, guillotine doors or other similar closures, furnace tap blocks, areas that see mechanical abuse due to impact with process equipment such as door jambs and lentils and finally areas in contact with high amounts of flux.

 

For these areas WAM® AL II HD is the recommended product of choice. It is the same technology employed in the medium weight WAM® AL II without the micro-pores. Therefore, this product does not offer the same energy savings. However, it still retains the non-wetting, non-reactive, easy maintenance characteristics of the medium weight product but now in a high strength, abrasion resistant version. This product also resists the chemical attack of the alkali present in many fluxes.

 

WAM® AL II HD can be cast concurrently with the WAM® AL II. Therefore, impact areas can be cast with the dense material and then the medium weight material can be cast directly in contact with the dense material without any detrimental installation or service issues. Precast impact pads of WAM® AL II HD have also been used in conjunction with WAM® AL II.  Another very popular precast shape is tap out blocks. Because there is no sticking, the tap holes are very easily cleared of any corundum formations.

Typical Technical Data
WAM® AL II HD                                                                                    
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Classification:Special Cement Castable
Placement Method:Vibration Casting
Available Application Packages:This product is specifically designed for aluminum contact application
Typical Water Requirement (%wt):8
Material Required for Estimating (lb/ft3):168
Maximum Recommended Service Temperature (°F):3100

 

CHEMICAL ANALYSIS
Calculated wt.% Based on Common Oxides
THERMAL CONDUCTIVITY
(BTU-in/ft2-hr-°F)
Aluminum Oxide (Al2O3):78.6 %570°F12.1
Silicon Dioxide (SiO2):0.7 %1110°F11.2
Titanium Dioxide (TiO2):<0.1 %1650°F10.5
Iron(III) Oxide (Fe2O3):0.1 %2200°F10.1
Calcium Oxide (CaO):10.5 %  
Magnesium Oxide (MgO):<0.1 %  
Combined Alkali Oxide (Na2O + K2O):0.1 %  
Other:10.0 %  

PHYSICAL PROPERTIES

Temperature
(°F)
Density
(lb/ft3)
Modulus of
Rupture (psi)
Cold Crushing
Strength (psi)
Permanent
Linear Change (%)
After 230174395011,340n/a
After 1500168347011,070-0.1
After 2500n/a352011,450-0.2

Additional technical data may be available. Please contact your sales representative for more information.
Data on this table represent typical properties and cannot be used for specification purposes.