Operating problem

Thickener torque is rising

Review the sequence preceding the increase and distinguish process, instrumentation and mechanical causes.

What to observe

Compare feed, bed, underflow density and flow rate, rake actions, alarms and maintenance within the same time window.

What information is missing

An isolated torque value does not determine the cause. Identify equipment design, signal quality and what changed before the event.

Interpretation requires reviewing equipment conditions and plant procedures. This page guides diagnosis and does not define emergency actions.

Review how to approach the problem

Knowledge

Related reading

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,…

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