Vanadium sludge analyses 15-20 pct V2C5.
The oxide in the sludge is present in the form of
water soluble complex sodium salts. Simple
water leaching usually takes all the vanadium
content of the sludge to the solution. The
solution is then processed for the recovery of
vanadium either as red cake, or as calcium or
iron vanadate. The processing steps for any
of the said vanadium compounds are essentially
the same as that employed for treating the
sodium vanadate leach liquor obtainable from
water-leaching of roasted calcines during the
processing of vanadium bearing slags.