CONTINUOUS ONLINE CARBON CONCENTRATION MEASUREMENT
A critical parameter in the efficient operation of Carbon-in-Leach (CIL) and Carbon-in-Pulp (CIP) processes is the accurate measurement and control of carbon concentration. The C² Meter v2.0, a product from Mintek, allows quick setup, easy installation and calibration as opposed to the traditional manual measurement methods which can be irregular, time consuming and often inaccurate. This can lead to poor carbon management in the circuit and less than optimal gold recovery.
The C² Meter v2.0 comprises an immersion probe and associated control panel. The probe contains a matched transmitter/receiver pair of piezoelectric (PZT) ceramic transducers to continuously measure the carbon concentration using ultrasound. The instrument is robust and has high availability.
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.
Continuous on-line measurement of carbon concentration in a pulp.
- Measurement accuracy < 2.5 g/l over operating range
- Robust construction
- Easy installation and calibration
- Accurate and faster monitoring of carbon concentration
- Reduced carbon losses through early detection of carbon screen leakage
- Reduced dependence on plant personnel
The C² Meter consists of a control panel, with a LED touch screen display and a probe. The probe may be mounted up to 5 metres from the electronics cabinet and is connected to the cabinet by triaxial cables.
The control electronics generate a 1 MHz pulse envelope called the transmitter pulse, which is sent to the transmitter probe through the triaxial cable. The pulse is transmitted ultrasonically by the crystal in the transmitter probe, through the slurry to the receiver crystal. This received pulse is fed back through the triaxial cable to the control electronics; and the attenuation is measured.
One of the variable parameters that influence the carbon concentration result is the relative density (RD) of the slurry. The meter requires the RD of the slurry to be read in from a density meter, or input via the LED touch screen display as a parameter.
The C² Meter displays the carbon concentration and the density of the slurry, as well as the transmitted and received voltages, and the transmitted/received signal level ratio in dB. The carbon concentration indication is provided on a 4 – 20 mA current loop output for remote monitoring or interfacing with a plant control system.
|Accuracy over operating range||1.0g/l|
|Operating Range||Pulp Density: SG 1.2 to 1.6 Carbon Concentraton: 0 to 50g/l|
|Electrical||AC Input: 100 to 240 VAC|
|Max Temperatures||Storage: 0 to 65°C Operating: 0 to 45°C|
|Output||Active Isolated to to 20 mA signal of carbon concentration|
|Dimensions||1.7 x 0.8 x 0.5 m Weight : 75kg|