3440 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
shown in Figure 8. The results indicate that the reaction is
second order in ferrous ions at higher concentrations, but
as the reaction proceeds the kinetics deviate from second
order. This deviation from second order kinetics has been
noted by both Chmielewski and Charewicz (1984) and
Verbaan and Crundwell (1986).
The oxidation of ferrous ions was also investigated by
Chmielewski and Charewicz (1984), and their results are
Table 1. Test conditions for data given in Figure 7
Test Temperature, °C Pressure, bar g Ferrous ion, g/L Acid, g/L
A 90 5.0 8.3 9.8
B 80 3.0 20.1 49.0
C 70 2.0 20.4 49.0
D 60 1.0 20.8 49.0
Figure 6. A plot of the inverse of the relative concentration of iron exiting each tank in
the precipitation train
Figure 7. The conversion of ferrous ions as a function of time spent in the batch reactor
shown in Figure 8. The results indicate that the reaction is
second order in ferrous ions at higher concentrations, but
as the reaction proceeds the kinetics deviate from second
order. This deviation from second order kinetics has been
noted by both Chmielewski and Charewicz (1984) and
Verbaan and Crundwell (1986).
The oxidation of ferrous ions was also investigated by
Chmielewski and Charewicz (1984), and their results are
Table 1. Test conditions for data given in Figure 7
Test Temperature, °C Pressure, bar g Ferrous ion, g/L Acid, g/L
A 90 5.0 8.3 9.8
B 80 3.0 20.1 49.0
C 70 2.0 20.4 49.0
D 60 1.0 20.8 49.0
Figure 6. A plot of the inverse of the relative concentration of iron exiting each tank in
the precipitation train
Figure 7. The conversion of ferrous ions as a function of time spent in the batch reactor