2182 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
obtained under these conditions and confirm that the PAM
molecules generate a hydrophilic coating on the surface of
the chalcopyrite particles.
Adsorption Isotherms
Adsorption isotherms are very useful tools to understand
the interaction between the molecules of a reagent and a
surface, in this case, chalcopyrite particles. Figures 7, 8 and
9 exhibit the PAM adsorption isotherms on chalcopyrite
particles as a function of the PAM concentration for the
0
50
100
150
200
250
300
350
400
0 1 2 3 4 5 6 7 8 9 10
PAM concentration, mg/L
NS-PAM
MS-PAM
SS-PAM
Figure 5. Induction time of chalcopyrite as a function of PAM concentration for the different
levels of mechanical degradation evaluated (NS, MS and SS-PAM) at pH 9 using a 0.01 M NaCl
solution
0
50
100
150
200
250
300
350
400
0 1 2 3 4 5 6 7 8 9 10
PAM concentration, mg/L
NS-PAM
MS-PAM
SS-PAM
Figure 6. Induction time of chalcopyrite as a function of PAM concentration for the different
levels of mechanical degradation evaluated (NS, MS and SS-PAM) at pH 11 using a 0.01 M NaCl
solution
Induction
t
e,
ms
Induction
t
e,
ms