Double-Drum Hoist Conllaboration On Rope Maintenace

The above success would not have been possible without forming a close relationship with mine staff and being able to access mine records. Based on information gleaned from old records, a new maintenance regime for these new ropes was introduced. Procedures were changed when needed, arising from the continued review of rope performance. Many adjustments

over the life of the ropes were made. These were based on the observations of the rope performance. A partnership was formed between the three parties – CASAR, Nobles and Mount Isa Mines. Nobles acted as the provider of data and regularly serviced the mine. Advice and views were freely discussed with all parties. To obtain the maximum rope life all parties needed to contribute, including the rope handling crews and other rope monitoring personnel. This was done very effectively and contributed to the success story.

The first rope crop was carried out at 26 000 cycles, almost double the standard. The second was done after a further 45 000 cycles and the third at 63 000 cycles as the boundaries were pushed even further, but the rope began to develop stress fractures at the crossovers. Due to the partnership, this was detected very early, so no rope structural damage occurred.

It was decided from then on to crop at 50 000 cycles, a figure known to be safe. This was over three times the previous crop periods and produced a large cost saving due to less downtime.

To coincide with this, the capel crops were moved to coincide with the drum crops saving even more downtime. The ropes proved much easier to handle in both drum and capel cropping, with no spin being detected. The test samples were easier to prepare. This has reduced the time for the crops by some four hours.

KF CRANE is a professional production of heavy overhead crane manufacturer, overhead crane was hung in workshops, warehouses and material lifting field empty for material lifting equipment. Because of its ends situated in the tall concrete pillars or metal stent, shaped like a bridge.

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