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ALKALI RESISTANT CASTABLES

 

Durocast have developed a range of alkali resistant castables suitable for a wide variety of applications.

 

 During the development process refractory samples were prepared, filled with alkali mixtures and fired.

 Industry standard low cement castables performed poorly in these tests. The alkali easily penetrated the castable and
 caused severe cracking.
 The newly developed castable Duroguard 40 T and Duroguard 50 T showed virtually no penetration by the alkali and were
 undamaged after the test.
 Note how the blue white alkali is retained by the Duroguard product.
 
 
 Appications for these castables include:
 
 • Caustic waste incinerators
 • Barrier layers in aluminium pot lines
 • Cement Kiln Pre-Heaters
 
  As a further step Alkali resistant silicon carbide containing castables have been developed for areas in cement kiln Pre-Heaters
  where buildups occur.
 
  
 
 Additional tests are being carried out to optimize these materials for other high Alkali applications. These include kilns used in
 the vanadium industry, and for  manufacturing chrome tanning salts.