XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 2173
the mass fraction of galena. This is expected since heat of
immersion is additive. These experimental data points are
meant to simulate the behaviour of a sample of real ore,
perhaps feed, tailings and concentrate samples so as to gen-
erate a wide range of grades. Once the linear relationship
is generated, it is a simple matter to extrapolate to 100%
of each mineral, giving the heat of immersion for the pure
mineral, which otherwise may be unobtainable. If pure
mineral values are available this is an excellent method to
validate the technique. In the case shown in Figure 4, the
measured heats of immersion of pure albite and galena are
shown with a red diamond and pink square, respectively.
Galena
Orpiment
Realgar
Talc
Graphite
Albite
100% Galena
75% Galena
50% Galena
25% Galena
16% Galena
y =8539x-2.82
R² =0.96
0.001
0.010
0.100
30 300 -∆Himm (mJ/m2)
Natural minerals Collector-coated galena
Figure 3. Rate constant (normalized for mineral density) as a function of exothermic heat of
immersion
y =0.8043x +10.225
R² =0.9212
0
20
40
60
80
100
120
0 20 40 60 80 100
PbS composig415on in the binary mixture (wt%)
Experimental data 100% Albite experimental
100% Galena experimental Linear (Experimental data )
Figure 4. Heat of immersion measured as a function of galena (PbS) mass fraction in a galena-
albite mixture. Also given are heats of immersion for a 100% albite (red diamond) and 100%
galena (pink square) samples. Immersion liquid was hexanol
Normalised
Rate
constant
(min-1/g/ml)
Heat
released
(-mJ/m2)
the mass fraction of galena. This is expected since heat of
immersion is additive. These experimental data points are
meant to simulate the behaviour of a sample of real ore,
perhaps feed, tailings and concentrate samples so as to gen-
erate a wide range of grades. Once the linear relationship
is generated, it is a simple matter to extrapolate to 100%
of each mineral, giving the heat of immersion for the pure
mineral, which otherwise may be unobtainable. If pure
mineral values are available this is an excellent method to
validate the technique. In the case shown in Figure 4, the
measured heats of immersion of pure albite and galena are
shown with a red diamond and pink square, respectively.
Galena
Orpiment
Realgar
Talc
Graphite
Albite
100% Galena
75% Galena
50% Galena
25% Galena
16% Galena
y =8539x-2.82
R² =0.96
0.001
0.010
0.100
30 300 -∆Himm (mJ/m2)
Natural minerals Collector-coated galena
Figure 3. Rate constant (normalized for mineral density) as a function of exothermic heat of
immersion
y =0.8043x +10.225
R² =0.9212
0
20
40
60
80
100
120
0 20 40 60 80 100
PbS composig415on in the binary mixture (wt%)
Experimental data 100% Albite experimental
100% Galena experimental Linear (Experimental data )
Figure 4. Heat of immersion measured as a function of galena (PbS) mass fraction in a galena-
albite mixture. Also given are heats of immersion for a 100% albite (red diamond) and 100%
galena (pink square) samples. Immersion liquid was hexanol
Normalised
Rate
constant
(min-1/g/ml)
Heat
released
(-mJ/m2)