Thickening

Thickener diagnostics

We review feed, bed and discharge to investigate changes in density, flow rate or rake torque.

When it applies

The underflow loses stability or torque rises without an identified cause.

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Starting information

  • Feed, bed, torque and discharge trends
  • Equipment design and operating limits
  • Shift logs, alarms and setpoint changes

Proposed work

We align signals on a common time scale and compare input disturbances with operating actions. The review distinguishes process hypotheses from possible measurement problems.

Deliverable

A diagnostic report with the event sequence, tested hypotheses, missing information and proposed tests.

Plant trials, equipment installation and control changes require a specific scope and authorisation. This description does not replace operating procedures.

Knowledge

Related reading

Thickening 3 min

How a tailings thickener works

A thickener receives slurry, promotes separation between solids and water, removes clarified water through the overflow and discharges a more concentrated slurry through the underflow. Its response depends on how…

Published

Thickening 3 min

What causes torque to rise in a thickener?

Torque rises when the rakes encounter more resistance while moving material. Bed level can contribute, but it is not the only cause. Solids concentration and compaction, rheological behaviour, feed settleability,…

Published