HAWK has released ‘ORCA’ Sonar Bed Level Transmitters which are suitable for use in the mineral processing industry.
The units control compact bed lev¬el/hindered layer level maximises the efficiency and performance of Tail¬ings Thickeners, CCD’s, Hi-Rate Thickeners, Lamella Thickeners and Clarifiers.
Hawk says the monitoring of the two independent interface densities provides reliable process feedback for:
1. Control of the underflow pump to optimise the underflow density.
2. Removes operators from manually controlling underflow pumps based on rake torque and bed pressure which are greatly affected by density change.
3. Allows operations to run thickener at manufacturer’s optimum design levels with less risk of rake overload.
4. Using both compact bed and hindered/interface layer provides only reliable real-time process settling con¬ditions based on deviation changes to the two independent densities caused by changes in ore type, hydrau¬lic changes, flocculent dosing, coagulant dosing etc which all affect settling conditions.
5. Reduces overall chemical costs by providing a bias in dosing chemical to the minimum dose at all times.
6. Reduces electricity costs on returning water from tailings dams by pumping optimised tailings bed densi¬ties.
7. Provides a supplementary control for flocculent dosing or can control the flocculent dosing.
The new Hawk transducer designs include three to seven sonar crystals mounted in a single head. Each sonar array produces a concentrated sonar beam, providing more emitted power and collecting more returned signals. Array transducers yield better penetration, higher sensitivity, and better overall performance with significant savings in the most difficult environments.
For further information, please contact Hawk Measurement Systems on 03 9873 4750.