BNZ Materials’ insulating aggregates are formed by crushing large slabs of specialty formulated low-density insulating material.  The pulverization process is done with special equipment designed especially for this type of material.
 
 

 
 

                [ download Aggregates MSDS]    [download Aggregates summary data sheet]
       

Raw Material.
For manufacturing insulating castables.

Loose Fill.
For insulating irregular spaces where other types of refractories are difficult to use.

Hot Topping Compound.
For covering steel ingot hot tops and risers in ferrous and non ferrous foundries.

Selection.
Blazelite insulating aggregates are available in different chemical compositions for different temperature functions.  They are also available in two different gradations.

Economical.
Can be combined with shipments of other materials from the Zelienople plant to reduce freight charges.  Installation as loose fill is quick - reducing labor costs versus other refractories.

High Quality.
Produced under rigorous quality standards by the same process used in manufacturing insulating fire brick.

 The first two numbers in the following Blazelite aggregates designations refer to the refractories or heat reststance of the aggregate.  The second two numbers refer to the approximate density of the slab.  An LI designation means it low in impurities of ferric oxide and titania.  The LI designated aggregates are suitable for use in reducing atmospheres when combined with low iron calcium aluminate cements.

Blazelite Aggregates

2337 LI.
Can be combined with portland cement or calcium aluminate cements to produce a low-density, low-temperature insulating castable for 2300°F service or below.

2645 LI.
A lower density version of 2653 LI used for the very lightest castable in the 2400 to 2600°F range.

2653 LI.
A high purity material for temperatures of 2400 to 2600°F, used extensively for low-iron insulating castables.

2855 LI.
Used as a high temperature filler material and for the lightest weight high temperature castables.  Its high purity is absolutely necessary for high temperature applications.

2861 LI.
An alternate to 2855 LI, it is used when a higher strength insulating castable is desired.
     
Typical Data  
   

Type Aggregate
Physical Properties   2337 LI 2645 LI 2653 LI 2855 LI 2861 LI
Density, pcf   37 45 53 55 61
Cold Crushing Strength, psi   160 275 400 300 400
Permanent Linear Change, %            
    24 hr soaking at temperature            
      2200°F   0.0        
      2300°F   0.0        
      2400°F   -3.0 Trace Trace    
      2500°F     Trace Trace    
      2600°F     -0.8 -0.8 0.0 0.0
      2700°F     -4.4 -4.4 0.0 0.0
      2800°F         -1.5 -1.5
Chemical Analysis, %            
    Alumina - Al2O3   31.4 37.6 37.6 59.9 59.9
    Silica - SiO2   53.9 59.4 59.4 37.8 37.8
    Ferric Oxide - Fe2O3   0.7 0.6 0.6 0.5 0.5
    Titania - TiO2   0.8 1.2 1.2 1.3 1.3
    Calcium Oxide - CaO   12.6 0.0 0.0 0.1 0.1
    Magnesium Oxide - MgO   0.2 0.0 0.0 0.1 0.1
    Alkalies Na2O & K2O   0.3 0.2 0.2 0.3 0.3
Screen Analysis    
    2645LI
Percent Blazelite 2653 LI
On Screen 2337 LI 2681 LI
Retained Aggregates 2855 LI
  Grind (cumulative)
  5/16 7/16* 5/16* 9/16*  
1/2 Mesh 0 0 0 0  
3 Mesh 1 4 1 4  
4 Mesh 6 10 5 10  
10 Mesh 23 26 22 22  
28 Mesh 38 43 40 40  
65 Mesh 50 53 62 62  
Minus 65 Mesh 50 47 38 38  
* This grind will be supplied in the absence of a grind designation on order    
Standard Sizes    
Blazelite Lbs/ Lbs/
Aggregates Bag Pallet
2337 LI 65 1950
2645 Li 80 2400
2653 LI 80 2400
2855 LI 80 2400
2661 LI 85 2550
         

BNZ Materials warrants that its products are manufactured in accordance with its applicable material specifications and are free from defects in workmanship and materials using BNZ's specifications as a standard. Every claim under this warranty shall be deemed waived unless in writing and received by BNZ within thirty (30) days of the date the defect was discovered and within one (1) year of the date of the shipment of the product.

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