The Bulk Flotation
flowsheet, which is already in the Base Case, will be pilot tested over the coming months in order to fully de-risk it.
Following grinding, the process flowsheet incorporates conventional bulk flotation
including rougher flotation followed by two stages of cleaning to produce a gold-bearing sulphide concentrate representing about 3.5% of the fresh feed weight.
Ore processing contemplates a single-stage crush, various stages of milling, bulk flotation
roughing, various stages of copper cleaning, and regrind to produce a single copper concentrate containing gold.
Combined gold recovery for both gravity and bulk flotation
processes in the current test work is estimated at 82 percent for zone 103 and 89 percent for zone 104 and compares well with the previous metallurgical results of 2013.
The overarching goal of this work was to test the possibility of replacing sodium cyanide by chitosan polymer as a selective pyrite depressant in the bulk flotation
of complex sulfide ore sample containing galena (PbS), chalcopyrite (CuFe[S.sub.2]), sphalerite (ZnS), pyrite (Fe[S.sub.2]), dolomite (CaMg[(C[O.sub.3]).sub.2]), and marcasite (a polymorph of pyrite).
Extremely fine intergrowth between galena and sphalerite minerals inhibits selective flotation separation and favours bulk flotation
. Due to fine dissemination and interlocking of minerals, extensive fine grinding is often needed, which is energy intensive.
Bench scale testing has been largely completed and testing moved on to bulk flotation
This collector has found application in the bulk flotation
of copper and cobalt minerals in conjunction with other thiol collectors, usually at slightly lower than pH than other common thiol collectors.
It is usual when moving from bench-scale to bulk flotation
that there is a drop-off in performance both in terms of the grade of the concentrates and the recovery of graphite.
PPL's expanded plant, simply put, now consists of a new circuit that is essentially a pebble flotation circuit and the old circuit, which is a bulk flotation
In bulk flotation
or differential depression circuits where two or more minerals have been floated simultaneously, it may be advantageous or necessary to recondition the product and refloat the concentrate to separate the individual minerals.
* At a number of concentrators, new effective reagent regimes have been introduced for the separation of bulk flotation
concentrates, plant operation now incorporating full water recycling.