C² Meter
Online Carbon Concentration Measurement
Features

Continuous on-line measurement of carbon
concentration.




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Detection limit of 0.2 g/l
Operator-friendly
Robust construction
Self-contained
Easy installation and calibration
Benefits
A critical parameter in the efficient operation of CIL/CIP

Increased accurate and faster monitoring of
CIP/CIL processes

Improved gold recovery through continuous
carbon profiling

Reduced carbon losses through early
detection of carbon screen leakage

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Reduced dependence on plant personnel
processes is the accurate measurement and control of
carbon concentration in the pulp. Traditional
measurement methods are manual, time consuming and
often inaccurate. This leads to poor process control and
loss of gold.
The MINTEK C² Meter 2 is fully self-contained and
Improved carbon transfer control using
Mintek’s Carbon Transfer Controller Module
(option)
comprises an immersion probe and its associated control
panel. The probe, designed and constructed to measure
continuously in the adsorption tank pulp, contains a
matched transmitter/receiver pair of piezoelectric (PZT)
ceramic transducers to generate and measure the
attenuation of the ultrasonic signal.
The meter allows quick setup, easy installation and
calibration. It is supplied with a 100-240 VAC power
supply, a 4 to 20 mA output, an error output relay and
one 4 to 20 mA optional density meter input.
The C² Meter can be used together with the Carbon
Transfer Controller to reduce gold losses. The controller
is part of Leachstar, Mintek’s advanced control suite
www.mintek.co.za
Example: Measurement vs. Pump
The concentration measurement from a leach tank shows the
sensitivity of the C2 Meter. Transferring carbon to the tank with
pump 4 show the concentration increase. Transferring to tank 5
shows the drop in concentration. The C2 Meter together with the
Carbon Transfer Controller can be used to ensure carbon
C2 Meter: Online Carbon Concentration Measurement
Reduction in soluble gold losses.
1.0
Soluble Gold Loss (normalised)
0.9
0.8
Off 1
0.750
0.7
Off 1 Avg.
0.6
On 1
0.523
0.5
On 1 Avg.
Off 2
0.4
0.359
0.3
Off 2 Avg.
On 2
0.242
0.2
On 2 Avg.
0.1
0.0
0
2
4
6
8
10
12
14
16
18
20
22
24
26
Day
Actual reduction achieved at a mine using the C² Carbon concentration meter
together with the Carbon Movement Controller
Typical Installation
C²M
C²M
C²M
I/O
CIP / CIL
Tanks
Slurry movement
Carbon movement
Typical C² Meter installation
on a section of a leach circuit
Typical Installation of the Carbon Concentration incorporating the Carbon Movement Controller
C2M
120/220 VAC
OPC via Ethernet
Receive Cable
Transmit Cable
4-20 mA Carbon Concentration Output
Fault Digital Output
4-20 mA Density Input
PLC
www.mintek.co.za
C² Meter
Specifications
General
Accuracy over operating range
1.0 g/l
2.0 ml/l
Sensitivity
0.2 g/l
0.4 ml/l
Operating Range
Pulp Density
SG 1.2 to 1.6
Carbon Concentration*
0 to 50 g/l
0 to 100 ml/l
Materials
Controller Panel
Polycarbonate
Probe
Cast 316 Stainless Steel
Probe Extension
316 Stainless Steel
Signal Wire
Polyethylene Sheath
Max. Temperature
Storage Temperature
0 to 65 °C
32 to 149 °F
Operating Temperature
0 to 45 °C
32 to 113 °F
Electrical
AC Input
100 to 240 VAC nominal 50 to 60 Hz
Input Power
30 VA (max)
Inputs and Outputs
Output
Active isolated 4 to 20 mA signal of carbon concentration
Relay
Potential free contact for error signal
Input
Passive isolated 4 – 20 mA external density signal (alternatively pre-set)
Panel Display
CC
Carbon Concentration
Vt
Voltage transmitted to the piezoelectric (PZT) ceramic transducer
Vr
Voltage received from the piezoelectric (PZT) ceramic transducer
Att
Calculated attenuation
SG
Pre-set of density meter input of pulp density
Environmental
Relative Humidity
0 to 95%
Control Panel
IP 68
Shipping
Number of Pieces
1
Maximum Weight
75 kg
165 lb.
Maximum Size (L x W x H)
1.7 x 0.8 x 0.5 m
5.6 x 5.9 x 1.6 ft.
Size (L x W x H)
Control Panel
0.43 x 0.2 x 0.53 m
17 x 8 x 21 in.
Probe
1.60 x 0.20 x 0.08 m
63.0 x 7.9 x 3.2 in.
Probe Extension
0.025 x 0.025 x 1.50 m
1 x 1 x 60 in.
Cable length
15 m
50 ft.
Standard and Approvals
Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management
Weight
Probe
8.25 kg
18 lb.
Control Panel
10 kg
22 lb.
*Foreign particles may affect the operation of the meter. These may include grit, grinding media or beads, clay materials, etc.
Please contact Mintek should the plant encounter such materials or if uncertain.
www.mintek.co.za
C2 Meter
Dimensions
Control Panel
Probe
Probe Extension
Ø25mm
(1 in.)
1500 mm
(60 in.)
Contact Details
200 Malibongwe Drive, Randburg 2125, South Africa • Tel. +27 (0)11 709 4111 • Fax +27 (0)11 793 1606 • www.mintek.co.za • e-mail: c2meter@mintek.co.za
Specifications subject to change without notice. All rights reserved. All corporate names and trademarks stated herein are the property of their respective companies
C2M_DTS_E Rev 05 (07/15) © Mintek