Complex rigging, extraction from a confined mill building, bearing overhaul and sub-millimeter dynamic laser realignment for the primary drive of a 6,500 TPH cement grinding mill.
A 110 Metric Tonne primary mill drive gearbox on a high-throughput 6,500 TPH cement grinding mill suffered severe gear mesh wear requiring complete removal, overhaul and replacement during a scheduled plant shutdown. The component was situated deep within the mill machinery house with limited overhead crane clearance and strict floor loading limits.
Our engineering team engineered a dual-stage extraction system utilizing heavy hydraulic jacking tracks and load-spreading steel mats to skate the 110 MT gearbox out of the mill bay. A heavy mobile crane lifted the unit for shop overhaul, followed by re-entry, precision sole-plate levelling, dial gauge runout verification and laser shaft alignment.
Following baseplate non-shrink grouting and torque audit, the mill rank gearbox was successfully started under no-load and full-load trial runs. Spectral vibration analysis confirmed all bearing and mesh frequencies were well within OEM acceptable limits.
Contact Shri Pramod Kumar Sharma for specialized heavy equipment rigging studies and shutdown execution.
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