XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 1181
higher pH(pH=9.0±0.2), which is more conducive to the
flotation of wolframite and cassiterite. In this way, schee-
lite, wolframite, and cassiterite could be floated under their
optimal condition, thereby increasing the overall recovery
of tungsten and tin. At the same time, since the tungsten-
tin minerals in the tailings of the main process are relatively
difficult to float, it is considered to produce low-grade
tungsten-tin mixed concentrate in the secondary process to
minimize the potential loss of valuable minerals during the
flotation process.
Table 6 showed the results of the closed-circuit flota-
tion experiment for the new-process. First, the decrease in
the main process pH initially reduces the recovery rates of
scheelite and cassiterite, resulting in lower recovery rates
of tungsten and tin in the main process tungsten concen-
trate, at 69.18% and 2.61% respectively, consistent with
pure mineral experiments. However, the higher pH in the
secondary process enhances the floating effect of scheelite
and cassiterite. Consequently, the comprehensive recovery
rate of tungsten exceeds that in plant, is 73.48%. While
Figure 10. The configuration and LUMO energies of Pb-BHA and Pb-MBHA
Figure 11. The recovery of scheelite, wolframite, cassiterite, calcite, and fluorite under the Pb-BHA and
Pb-MBHA as the collector
higher pH(pH=9.0±0.2), which is more conducive to the
flotation of wolframite and cassiterite. In this way, schee-
lite, wolframite, and cassiterite could be floated under their
optimal condition, thereby increasing the overall recovery
of tungsten and tin. At the same time, since the tungsten-
tin minerals in the tailings of the main process are relatively
difficult to float, it is considered to produce low-grade
tungsten-tin mixed concentrate in the secondary process to
minimize the potential loss of valuable minerals during the
flotation process.
Table 6 showed the results of the closed-circuit flota-
tion experiment for the new-process. First, the decrease in
the main process pH initially reduces the recovery rates of
scheelite and cassiterite, resulting in lower recovery rates
of tungsten and tin in the main process tungsten concen-
trate, at 69.18% and 2.61% respectively, consistent with
pure mineral experiments. However, the higher pH in the
secondary process enhances the floating effect of scheelite
and cassiterite. Consequently, the comprehensive recovery
rate of tungsten exceeds that in plant, is 73.48%. While
Figure 10. The configuration and LUMO energies of Pb-BHA and Pb-MBHA
Figure 11. The recovery of scheelite, wolframite, cassiterite, calcite, and fluorite under the Pb-BHA and
Pb-MBHA as the collector