Recycling process water in sulfide flotation, Part A: Effect of calcium and sulfate on sphalerite recovery

Behavior and effect of calcium during hydrothermal sulfidation and flotation of zinc-calcium-based neutralization sludge

“…10(b) shows the zeta-potential of CaSO 4 and the hydrothermal synthetic ZnS. The zeta-potential of hydrothermal synthetic ZnS was negative in the entire pH range from 2 to 10, which is considered consistent with the zeta-potential of sphalerite reported in Ikumapayi et al (2012). However, the zeta-potential of CaSO 4 was positive.…”

Effects of salinity on xanthate adsorption on sphalerite and bubble–sphalerite interactions

“…4m) shows a relatively higher intensity of C 1s II. It was reported that, with the increase of xanthate adsorption amount, the relative intensity of C 1s II to the intensities of C 1s I and C 1s IV increases (Deng et al, 2013;Ikumapayi et al, 2012). However, the relative higher intensity of C 1s II in Fig.…”

“…The C 1s peaks I, II and IV can be attributed to hydrocarbon contaminants, specifically CA(C, H), CAO, and carbonate respectively (Hu et al, 2012;Ikumapayi et al, 2012;Miller et al, 2002). The C 1s peak II can also be attributed to CAO in adsorbed xanthate (Deng et al, 2013;Ikumapayi et al, 2012). The C 1s III is reported to be attributed to C@O (Hu et al, 2012) or hydrocarbon species on oxidized (insulating) mineral surfaces (Khmeleva et al, 2005), which is also close to the binding energy of solid CS 2 (Ranta et al, 1981) and dixanthogen (Szargan et al, 1992).…”

“…4a, the C 1s spectrum of sphalerite treated in PAX with Milli-Q water is composed of four peaks at 284.8 (C 1s I), 286.3 (C 1s II), 287.9 (C 1s III) and 288.7 eV (C 1s IV), respectively. The C 1s peaks I, II and IV can be attributed to hydrocarbon contaminants, specifically CA(C, H), CAO, and carbonate respectively (Hu et al, 2012;Ikumapayi et al, 2012;Miller et al, 2002). The C 1s peak II can also be attributed to CAO in adsorbed xanthate (Deng et al, 2013;Ikumapayi et al, 2012).…”

“…In Fig. 4b, the O 1s I at 531.4 eV is assigned to hydroxyl groups (Gonzalez-Elipe et al, 1990;Khmeleva et al, 2005;Ikumapayi et al, 2012), and the O 1s II at 533.0 eV is due to the adsorption of xanthate (Ihs et al, 1993;Mielczarski et al, 1983Mielczarski et al, , 1996. In Fig.…”