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Mining industry opts for rubber liners to protect mills
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26th August 2005
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The process of milling ore results in considerable abrasion and erosion of unprotected surfaces, which necessitates mills being protected by mill linings. The mining industry has come to appreciate that modern rubber linings offer an appropriate alternative in terms of protection and of energy transmission to the mill load.

Multotec Rubber has the capacity to supply the high quality of mill and scrubber liners, screen panels, high-impact liners and conveyor loading points demanded by the mining industry. The company operates its rub- ber-manufacturing facility in Spartan, Kempton Park, on the East Rand.

MD Mike Griffin says the company supplies rubber and composite liners for all types of mills, including autogenous, semiautogenous, primary and secondary ball and rod mills, pebble mills and scrubbers, catering for different types of discharges and overflows. He is convinced of the products’ value in the mining industry.

“Rubber liners have many advantages. They suffer less wear than the norm and are simple to install, which leads to increased production time and little downtime for replacement, with the resultant cost savings. “Our customers benefit in savings on spares costs, savings on downtime and increased revenue from longer production cycles,” he explains.

Griffin says another advantage of using rubber components is that it is beneficial to health and safety. Rubber liners assist hearing conservation by reducing noise levels by up to 50% and are easier to handle than conventional materials, reducing the potential for injury. There are several other bene- fits to using Multotec liners, such as improved sealing, which prevents material flushing behind the liners. Not only does the material behind the liners cause wear and damage to the mill shell itself, but also results in costly ‘gold lock-up’ underneath the liners.

“Multotec designs liners for mills of varying sizes. We assist our customers with the technical aspects of using Multotec components and also advise them on factors that affect wear, including critical milling speeds, ball sizes and pulp densities. “We also run software programs which simulate advanced mill- liner design and, based on these results, we customise the liner system to suit the application,” he says.

Multotec Rubber has the capacity to supply a complete range of components, including head plates, shell plates, trunions, lifter bars, grate plates, manhole covers, centre cones and pulp dischargers, as well as linings for support and filling segments.
 

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