Normally a refurbishment of this nature is a quick fix, only taking a few days to make the changeout. Installing newer technology also reduces the chance of lime buildup within the chamber and ensures that load capacity is maximized. This creates a protective layer against wear of the body liners during operation. The magnets cause the grinding balls to adhere to the liners around the perimeter of the mill body.
Solution: Upgrading of older wear bar systems with newer generation magnetic linersĪ key refurbishment solution is replacing the older liner and rubber bars with magnetic liners.
One issue we see is lime build-up on top of these rubber wear bars which can lead to diminished chamber size and load capacity. On older vertical mills, the body liners have wear protection bars that are made from rubber. Problem: Lime build up on rubber wear protection bars This can save considerable time to discharge the grinding balls during a maintenance shutdown. The actuator can also be used for opening the VTM door when the mill contains a ball charge. This is a system that has been developed recently and has been applied to various VTM sizes from VTM-200 to VTM-1500. There is no need for workers near the door area while it is being opened. Solution: VTM door actuator for improved safetyĪ door actuator is a safety device that allows for the controlled opening of the VTM door. This can lead to media spillage, endangered maintenance workers, and cause problems for surrounding equipment. In the field, we’ve seen clients attempt to open the door using makeshift solutions such as long chains and other devices.
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When looking at VTM machines with manual doors, discharging the grinding media poses significant safety risks. Problem: Manual doors can pose significant safety risks This blog looks at three common issues we see in the field and some ways our teams have helped to solve them. However, Vertimills run into their own challenges in the field in terms of managing wear life as well as maintenance and parts handling. Vertimills offer a range of benefits over traditional ball mills including higher energy efficiency, lower media consumption, reduced maintenance, longer wear life, and a smaller footprint. However, this is not always an energy-efficient way of tackling the problem.
In the past, plants would invest in a second ball mill to run in parallel with their current one to add the additional capacity. Vertimill ® (VTM) stirred milling technology has seen increased interest, particularly in cases where a plant needs extra milling capacity or wants to achieve a finer grind. To keep energy costs in check as production demands continue to increase, more and more plants are looking at different options in terms of equipment selection. As head grades decline and more rock must be processed per ton of product, we can expect that the cost of energy will become an even more persistent danger to mining companies’ bottom lines. Treating more material in the mine means more energy expended in producing the same amount of product. To satisfy an even greater demand requires ever-increasing quantities of raw ore to be processed. Natural resources are being depleted just by maintaining the current level of production. At the same time, mineral processing is becoming more difficult every year. A growing global population and an accelerating economy is increasing the demand for minerals. Minerals processing is facing an unavoidable shakedown.
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