Material for structural components of an electrowinning cell for production of metal

Abstract

A material suitable for use for structural components in a cell for the electrolytic reduction of alumina to aluminium metal defined either by: the formula (A′ 1-u A″ u ) x (B′ 1-v B″ v ) y (C′ 1-w C″ w ) z O 4 , in which A′ and A″ are divalent elements from the group Co, Ni, or Zn, B′ and B″ are trivalent elements from the group Al, Cr, Mn, or Fe, and C′ and C″ are the tetravalent elements Ti or Sn. 0 is the element oxygen. 0≦u<1, 0≦v<1, 0≦w<1 1≦x≦2, 0≦y≦2 and 0≦z≦1, x+y+z=3 and 2x+3y+4z=8, or the formula A′ 1-s A″ s TiO 3 , in which A′ and A″ are divalent elements from the group Co, Ni, or Zn. O is the element oxygen. 0≦s<1 or the formula A′ 1-t A″ t O, in which A′ and A″ are divalent elements from the group Co, Ni, or Zn. O is the element oxygen. 0≦t<1.

1 . A material for manufacture of structural components, excluding electrodes, in a cell for electrolytic reduction of alumina to aluminium, characterised by  
     the formula  
       (A′ 1-u A″ u ) x (B′ 1-v B″ v ) y (C′ 1-w C″ w ) z O t , 
     in which t is essentially 1, 3 or 4, 0 is the element oxygen, A′ and A″ are elements from the group Co. Ni, or Zn, B′ and B″ are elements from the group Al, Cr, Mn, or Fe and C′ and C′ arm the elements Ti or Sn, 0≦u<1, 0≦v<1, 0≦w<1, 1≦x≦2, 0≦y≦2, 0≦z≦1; when t is essentially 1, y=0 and z=0, when t is essentially 3, y=0, w=0 and C′ denotes the element Ti.  
   
   
       2 . A material in accordance with  claim 1 , characterised in that 
 the cation A′ is essentially divalent Ni, u is essentially 0 and x is essentially 1.    
   
   
       3 . A material in accordance with  claim 1 , characterised in that 
 the cation B′ is essentially trivalent Al, the cation B″ is essentially trivalent Fe and y is essentially 2.    
   
   
       4 . A material in accordance with  claim 1 , characterised in that 
 the cation A′ is essentially divalent Ni, the cation B′ is essentially tetravalent Ti, and. u, v and z are essentially 0.