Improving the efficiency of the tailings thickener in an iron ore wet plant
Application Problem:
The iron ore wet plant is used to remove clay and alumina from the ore after being processed through the primary crusher. The ore is fed through rotating drums and water is used for the removal of the clay. This process water containing clay in suspension is pumped to the tailings thickener to settle out the clay and return the water to the wet plant process. Control of the underflow pump to optimize the underflow density is important. Supplementary control of flocculant dosing is also important as the clarometer sometimes overdoses and underdoses.
Solution:
We used our high powered 3 crystal array transducer to penetrate through the suspended clay solids to operate off the high density compact bed level. The Orca transducer can track two independent densities so we also tracked the lighter hindered layer. By monitoring both outputs in the PLC we were able to monitor the deviation between the two densities, which provided control functions for bed level control and supplementary flocculant dosing control.
The electroactuator scum cleaning mechanism provided insitu cleaning for the transducer even with the clay in suspension.
Ordering information:
Tailings thickeners part no: OSIRDYX + OSIRT302S4XC6
+ OSIRME-L3 + OSIRSC-A
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