Hard and abrasion resistant surfaces protecting cathode blocks o

Details Hard and abrasion resistant surfaces protecting cathode blocks o Hard and abrasion resistant surfaces protecting cathode blocks o

1995-08-07

1998-03-17

Turner, Archene

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

428325, 428698, 428701, 428702, 428704, B32B 1800

Patent

active

057284660

ABSTRACT:
A cathode block of a cell for the electrowinning of aluminium comprises a carbon body having a hard and abrasion-resistant surface obtained by heating an applied layer of particulate refractory hard metal boride with a bonding material which when heated reacts with the refractory hard metal boride and with carbon. In particular a slurry of particulate refractory boride in colloidal alumina is dried and heated under an inert or a reducing atmosphere, formed by a bed of carbon powder, and reacted to form at least one stable compound between aluminium derived from colloidal alumina; boron and titanium derived from the titanium diboride; and carbon from the reducing atmosphere.

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