Abstract: Adopting transducer to control the driving motor of thickener, the stepless speed regulation of motor can realized easily for accuracy controlling output slurry concentration from thickener. The application of wattmeter in control system can monitor current change of driving motor operation of thickener, thereby making the driving motor of rake lift action, rake lifting and protecting the machine from filled up.

Key words: transducer, wattmeter, thickener, operation control, output slurry concentration, rake lifting