NORDVIK Grinding Mills

• Complete size range — Ball mills up to 8 m diameter with matching accessories — from pilot plants to the largest concentrators.
• Energy-efficient design — Optimized shell liners, lifters and drive selection cut the kWh per tonne ground — grinding's biggest cost.
• Wet & dry operation — Configurations for wet overflow or grate discharge and dry grinding with air classification.
• Heavy-duty internals — Alloy and rubber liner systems, forged or cast heads and robust trunnion bearings for decades of service.
• Drive flexibility — Gear and pinion with single or dual drive, or gearless mill drive (GMD) on the largest mills.
• Full scope of supply — Shell, heads, liners, drive, lubrication, inching and control systems plus spares — one responsible supplier.

A grinding mill rotates a cylindrical shell partially filled with grinding media — steel balls, rods, or the ore itself in autogenous operation. As the shell rotates, lifters raise the media, which then cascade and cataract onto the ore bed, breaking particles by impact and abrasion. Ground product exits through the discharge grate or overflow, while classification equipment returns oversize for further grinding.

Mill type and size are selected from ore characteristics and process targets: AG/SAG mills for high-throughput primary grinding of competent ores, rod mills for coarse consistency, ball mills for fine grinding, and vertical stirred mills for regrind and ultrafine duties. Wet or dry operation is chosen with the downstream process in mind.

Supply scope covers the complete grinding unit — shell, heads, liner system, main bearings, drive (gear and pinion or gearless), lubrication, inching device and control system — plus accessories, installation supervision and long-term spare parts support.