XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 1719
up during indexing, but the quality was very low which
corroborates the low concentration of the impurities.
The results show the potential use of antisolvent crys-
tallization for commercial vanadium extraction from Bayer
liquor through the formation of a NaVO3 intermediate
product. When compared with the conventional extraction
of vanadium, this intermediate product is similar to the
sodium vanadate formed during calcining of vanadium
slag precipitated by sodium hydroxide (Habashi, 1998) but
without the extra energy requirements of high temperature
operations.
0
10
20
30
40
50
60
70
80
90
100
1 2 4 6
Batch time, h
Pure at 0.5 Pure at 0.75 Impure at 0.5 @100% Impure at 0.75@100%
Impure at 0.5@90% Impure at 0.75@90% Impure at 0.5@80% Impure at 0.75@80%
Figure 3. Vanadium salt yield for pure and impure system under varying O/A ratio and antisolvent concentration
86
88
90
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100
1 2 4 6
Batch time, h
Impure at 0.5 @100% Impure at 0.75@10% Impure at 0.5@90%
Impure at 0.75@90% Impure at 0.5@80% Impure at 0.75@80%
Figure 4. Vanadium salt purity under varying O/A ratio and antisolvent concentration
%
y
ofvanadium
s
t
%
puritovanadium
y
s
t