During the manufacturing processes some by-products are produced in smaller quantities, which are suitable for industrial use resulting from their characteristics. They have high alumina content and they are chemically medium pure.

Main characteristics: 
  • typical Al2O3 content: 99,20 %    
  • fair chemical purity    
  • grayish color    
  • We recommend our EKR-S for the production of: shaped refractories (bricks, etc) monolithics