Grinding mills are the heart of mineral processing operations, turning unearthed rock into precisely pulverised material that downstream processes rely on. In most plants, this is achieved using two workhorses of the industry — Semi-Autogenous Grinding (SAG) mills and Ball mills. Despite their differences, both operate on a simple but powerful principle: heavy steel balls cascading and colliding to break down large chunks of ore.

With several hundred tonnes of material rotating inside, these mills work under extreme mechanical and electrical stress. One challenge that every operator is familiar with is the dreaded Frozen Charge. When a mill remains stopped for an extended period, its contents can solidify. On restart, this mass no longer cascades gently; instead, it can drop suddenly and vertically, causing severe damage to the mill structure, lining, and drive system.

This is where engineering experience matters. Toshiba, drawing on decades of designing motors and drives for the mining industry, offers solutions that help operators mitigate this risk. Toshiba’s robust MV motors are built using precision Japanese engineering practices, and when paired with Toshiba’s MV VFDs, the system delivers smooth control, reliable protection, and application-specific flexibility. The optional Frozen Charge Detection algorithm in Toshiba MV drives further reduces the need for external equipment, saving both cost and space, in addition to improving reliability.

Learn more about Toshiba MV Motors and Drives:

https://tic.toshiba.com.au/products-and-services?category=Motors

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