Advanced thickener control - Metso Outotec , The control of the thickener must accommodate fluctuations in the process stream. This control is achieved by manipulating both the flocculant addition and the rate of underflow pumping. However fluctuations in ore type cause random changes in the required flocculant dosing.
Thickener Process Control Strategy , The objectives of thickener control are varied, but in most instances, the objective is to dewater the slurry, reclaim the clear overflow for reuse in the process, and produce a thickened or more dense underflow, which can either be rejected, in the case of tailings, or used as feed for subsequent unit operations. The general Process Control Strategy for a thickener are shown in Fig. 13. By ...
Thickener Underflow Level Control , We provide an Emerson Fisher Vee-Ball V150 Rotary Control Valve designed with hardened materials for thickener underflow appli ions. This valve provides long-term service life in conjunction with precise control. Precise control is achieved through a direct mounted Emerson Fisher FIELDVue DVC or a FIELDVue in-a-box.
Thickeners or thickener plants--optimizing the performance ... , Thickener plant flow sheet. Reducing operational variability through control system improvements Despite the design of the thickener and installation of good instrumentation, poor overall plant design, inadequate automation, or low operator focus can be contributing factors in thickeners that fail to consistently achieve the best results.
PDF THICKENER DESIGN, CONTROL AND DEVELOPMENT , Thickener control strategies and shortcomings in current thickener operations are discussed, including the strengths and weaknesses of the given field instrument options and their appli ion in...
Most common problems in thickener operations part 2 , Mud level control is used to maintain an optimum underflow density as high as possible to reduce the quantity of water discharge with the slurry while avoiding the bogging of discharge pumps. Mud level is controlled by manipulating the underflow pumping rate. When the mud level decreases there is less compression in the mud layer.
MudMax Bed-Level Monitoring System , Reliable Visibility Enables Unprecedented Control Although the thickening process is straightforward, plant operators must maintain the right balance between the amount of water at the top of the thickener and the density of settled solids at the bottom. When bed levels are too high, solids can spill into the launder.
ENHANCED PASTE PLANT CONTROL WITH ACT THICKENER OPTIMIZER ... , The thickener control appli ion uses the Model Predic- tive Control MPC algorithm. MPC is an advanced process control method which is considered a standard method for control processes with a multivariable character and complex response dynamics.
Thickener Control Automation and Control Engineering Forum , Inline visometers are used to control the addittion of sodium lignosulphonate which is a viscosity modifier. This reduces the viscosity for a given solids content and thus allows a higher solids content for the pumping capacity. In sand and gravel plants density measurement in the underflow provides a more accurate control.
Improve Clarifier and Thickener Design and Operation , Improve Clarifier and Thickener Design and Operation ... while illustrating it with an example from an actual plant design. The theory and appli ions will also be covered. ... operation, and control scheme. A typical installation pumps the solids out once an hour using a ti med control. Thickener in operation.
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