7
• CuSO4 is increased when mill feed Zn decreases.
• Until bubble size becomes too small, or
• Until bubble count is too high, or
• Until final concentrate Zn drops below target
• CuSO4 is decreased when mill feed Zn increases.
Dosing of MIBC (frother) is modified to control
rougher concentrate Zn. The frother dosage rate is increased
when rougher concentrate Zn increases, and the dosage rate
is decreased when rougher concentrate Zn decreases.
Lime reagent is controlled by final concentrate Zn.
The lime addition is increased when final concentrate Zn
decreases, and the lime addition is decreased when final
concentrate Zn increases.
CU CIRCUIT REAGENTS
Sodium dichromate (rougher and cleaner) is controlled by
mill feed Pb. It increases when mill feed Pb increases, and it
decreases when mill feed Pb decreases.
If Pb in final concentrate Cu is high (5) then starch
and sodium dichromate are increased. If Cu in final con-
centrate Pb is high (1) then starch and sodium dichromate
are decreased.
MIBC reagent is modified to control rougher concen-
trate Cu. MIBC is increased when rougher concentrate Cu
increases, and MIBC is decreased when rougher concen-
trate Cu decreases.
PB CIRCUIT REAGENTS
MIBC reagent is modified to control final concentrate Pb.
MIBC addition is increased when final concentrate Pb
increases, and MIBC addition is decreased when final con-
centrate Pb decreases.
SPECIAL REAGENTS CONTROL
There are 5 special reagents (Table 2) addition to flotation:
Pb collector, Zn Collector, Cu Collector, Fe Depressant,
and Pb Depressant.
For each reagent there are 2 modes for operator to run.
1. Basic mode: controls reagent at LL (Low Limit)
operator set.
2. Advanced mode: controls reagent at ratio of assay
reading, with exponential feedback control to
increase and decrease reagent dosing when the pro-
cess variable is far from the target.
Whether the reagents are in basic or advanced mode, if
the assay reading is below the threshold limit, then reagent
setpoint will be set to zero, then it will automatically run
again if assay reading returns within the operational range.
As part of the learning and observation, operators can
monitor online the VisioFroth ™ video from WebView.
This live stream can also be used for camera maintenance,
(i.e., camera gets dirty, camera disconnected, and camera
malfunction).
Figure 7. The correlation of Image miner to process variables
• CuSO4 is increased when mill feed Zn decreases.
• Until bubble size becomes too small, or
• Until bubble count is too high, or
• Until final concentrate Zn drops below target
• CuSO4 is decreased when mill feed Zn increases.
Dosing of MIBC (frother) is modified to control
rougher concentrate Zn. The frother dosage rate is increased
when rougher concentrate Zn increases, and the dosage rate
is decreased when rougher concentrate Zn decreases.
Lime reagent is controlled by final concentrate Zn.
The lime addition is increased when final concentrate Zn
decreases, and the lime addition is decreased when final
concentrate Zn increases.
CU CIRCUIT REAGENTS
Sodium dichromate (rougher and cleaner) is controlled by
mill feed Pb. It increases when mill feed Pb increases, and it
decreases when mill feed Pb decreases.
If Pb in final concentrate Cu is high (5) then starch
and sodium dichromate are increased. If Cu in final con-
centrate Pb is high (1) then starch and sodium dichromate
are decreased.
MIBC reagent is modified to control rougher concen-
trate Cu. MIBC is increased when rougher concentrate Cu
increases, and MIBC is decreased when rougher concen-
trate Cu decreases.
PB CIRCUIT REAGENTS
MIBC reagent is modified to control final concentrate Pb.
MIBC addition is increased when final concentrate Pb
increases, and MIBC addition is decreased when final con-
centrate Pb decreases.
SPECIAL REAGENTS CONTROL
There are 5 special reagents (Table 2) addition to flotation:
Pb collector, Zn Collector, Cu Collector, Fe Depressant,
and Pb Depressant.
For each reagent there are 2 modes for operator to run.
1. Basic mode: controls reagent at LL (Low Limit)
operator set.
2. Advanced mode: controls reagent at ratio of assay
reading, with exponential feedback control to
increase and decrease reagent dosing when the pro-
cess variable is far from the target.
Whether the reagents are in basic or advanced mode, if
the assay reading is below the threshold limit, then reagent
setpoint will be set to zero, then it will automatically run
again if assay reading returns within the operational range.
As part of the learning and observation, operators can
monitor online the VisioFroth ™ video from WebView.
This live stream can also be used for camera maintenance,
(i.e., camera gets dirty, camera disconnected, and camera
malfunction).
Figure 7. The correlation of Image miner to process variables