C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
204/71
C25C 1/06 (2006.01) C25C 7/00 (2006.01) C25C 7/06 (2006.01)
Patent
CA 1088023
ABSTRACT OF THE DISCLOSURE In the continuous production of iron by electrolysis of a ferrous electrolyte, the spent electrolyte is cooled before returning to a holding or regeneration tank, which tank contains metallic iron for regenerating ferrous ions from the ferric ions. The reconstituted electrolyte is heated before returning to the electrode-position cell. By reducing the temperature of the spent electrolyte the rate of hydrolysis of ferric ions to form oxides of iron, called sludge, is reduced, thus increasing the interval between periodic cleaning of the electrolyte regeneration system and the electrodeposition cell. In preferred forms of the invention heat energy is transferred from the spent electro- lyte to the reconstituted electrolyte by means of at least one counter flow heat exchanger in the form of a hollow cylinder containing a plurality of tubes made of titanium. There may be a controllable cooling device disposed between the holding tank and the or the last heat exchanger for maintaining the temperature of electrolyte in the holding tank at a selected value.
257229
Lucas Kevin
Roscoe Colin
Electricity Council (the)
Ridout & Maybee Llp
LandOfFree
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