Aluminum

Aluminum Reduction & Aluminum Cast House

Advancal® aluminium reduction cell material from Saint-Gobain offers extended service life through improved oxidation and corrosion resistance.  

 

Reduce oxide impurities and corrosion while achieving maximum furnace longevity with high-quality oxy-nitride and nitride bonded SiC from Saint-Gobain.  

Saint-Gobain refractory products provide outstanding corrosion, oxidation and chemical resistance for your toughest operating environments. 

Aluminum Reduction

Nitride bonded SiC refractories,  Advancal® and Refrax® ARC, have become the reference material for the sidewall lining of modern aluminum reduction cells. Advancal®, the latest aluminium reduction cell material from Saint-Gobain, offers outstanding corrosion, chemical and oxidation resistance. 

Silicon nitride bonded SiC refractories provide extended service life through improved oxidation and corrosion resistance. 

Thinner sidewalls with Advancal® aluminium reduction cells maximize heat flow characteristics through the wall to improve reduction cell performance.  

This is achieved through:
  • Larger bath volume which allows for larger anode 

  • Increased power due to the thinner, more thermally conductive SiC sidewalls and less electrical conductivity of the wall 

  • Superior oxidation resistance 

  • Excellent erosion and corrosion resistance when the sidewall is directly exposed to the Cryolithic bath or to the molten metal flow as it occurs in the case of Anode effects 

Saint-Gobain leads the industry in the development of innovative aluminium reduction cell materials. 

aluminum non ferrous

Aluminum Cast House

Melting furnaces are used to melt scrap or recycled aluminium, requiring a high heat input since the roof temperature can exceed 1,100°C. Holding furnaces receive molten metal from either the primary reduction potlines or from the melting furnaces. They operate at lower temperatures. Alkali chlorides and fluorides are often used as flux, to avoid bath oxidation and to help remove impurities in melting furnaces. These salts are very aggressive to the refractories. 

Molten aluminium is able to reduce many oxides found in the refractory linings, such as SiO2, Fe2O3, TiO2 to their metallic state. The by-product of this reaction is corundum. The accumulation of corundum on the refractory lining presents a major problem in melting furnaces. 

A combination of oxy-nitride bonded SiC bricks (Cryston® CN190 and CN806 oxy-nitride bonded SiCs) and low porosity, chemically bonded Alfrax® PB110 alumina bricks offers an optimal cost-performance compromise for ramp and hearth lining. Saint-Gobain also provides nitride bonded SiC Refrax® 20 and Cast Refrax® tap out blocks, throat inserts and stopper rods.