XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 2927
depressant, and Sasfroth200 as frother. It should further be
noted that the feed mass of solids fluctuated considerably
between successive samples of the same stream, mainly due
to the differences in the SG of the hot samples that were
collected from the plant at different stages. In each case the
relevant volume of reagent to achieve the target dosage was
based on the SG of the respective streams. The constant
and relatively high dosage of reagents in the Denver cell
was decided upon such as to ensure that none of them are
depleted and thereby confirming that the observed results
are due to the effects of the preconditioning through the
Mach rather than any other side-effects. Further note that
the Rougher feed samples were taken at a point in the
circuit prior to conditioning and thus relied only on the
Figure 1. Schematic of the Mach Reactor test rig
Table 1. Target reagent dosages for the various samples
Addition Point
Reagent Dosage (g/t)
CuSO
4 SIBX FinFix300 Sasfroth200
Rougher Feed
Plant — — — —
Denver cell — 160 250 40
Total — 160 250 40
Rougher Scavenger Feed
Plant 11 30 147 6
Denver cell — 160 250 40
Total 11 190 397 46
Cleaner Feed
Plant — — 100 —
Denver cell — 160 250 40
Total — 160 350 40
Final Tailings
Plant 11 183 420 65
Denver cell — 160 250 40
Total 11 343 670 105
depressant, and Sasfroth200 as frother. It should further be
noted that the feed mass of solids fluctuated considerably
between successive samples of the same stream, mainly due
to the differences in the SG of the hot samples that were
collected from the plant at different stages. In each case the
relevant volume of reagent to achieve the target dosage was
based on the SG of the respective streams. The constant
and relatively high dosage of reagents in the Denver cell
was decided upon such as to ensure that none of them are
depleted and thereby confirming that the observed results
are due to the effects of the preconditioning through the
Mach rather than any other side-effects. Further note that
the Rougher feed samples were taken at a point in the
circuit prior to conditioning and thus relied only on the
Figure 1. Schematic of the Mach Reactor test rig
Table 1. Target reagent dosages for the various samples
Addition Point
Reagent Dosage (g/t)
CuSO
4 SIBX FinFix300 Sasfroth200
Rougher Feed
Plant — — — —
Denver cell — 160 250 40
Total — 160 250 40
Rougher Scavenger Feed
Plant 11 30 147 6
Denver cell — 160 250 40
Total 11 190 397 46
Cleaner Feed
Plant — — 100 —
Denver cell — 160 250 40
Total — 160 350 40
Final Tailings
Plant 11 183 420 65
Denver cell — 160 250 40
Total 11 343 670 105