XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 2183
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 10 20 30 40 50
PAM equilibrium concentration, mg/L
NS-PAM
MS-PAM
SS-PAM
Figure 7. PAM adsorption on chalcopyrite particles as a function of PAM concentration for the
different levels of mechanical degradation evaluated (NS, MS and SS-PAM) at pH 7 using a 0.01
M NaCl solution
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 10 20 30 40 50
PAM equilibrium concentration, mg/L
NS-PAM
MS-PAM
SS-PAM
Figure 8. PAM adsorption on chalcopyrite particles 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
different levels of mechanical degradation evaluated at pH
7, 9 and 11, respectively. In general, it is possible to notice a
progressive increase in the adsorption of the flocculant with
the increase in its equilibrium concentration. Furthermore,
in the case of NS and MS-PAM, no large variations were
observed as a function of pH, although at pH 11 (Figure 9)
the specific adsorption achieved at equilibrium was slightly
lower than at pH values of 7 and 9. This effect is perfectly
correlated with the results obtained in the microflotation
tests, where precisely at pH 11 the highest recoveries were
obtained in the presence of PAM under both levels of deg-
radation. Contrary to what happens with NS and MS-PAM
PAM
adsorption,
mg/g
PAM
adsorption,
mg/g