Ball Mill Liner Upgrade at Chilean Copper Mine

Challenge

Frequent replacement (every 4-5 months) of Hadfield steel liners in Φ5.5*8.5m ball mills caused excessive downtime at a major copper operation.

Solution

Installation of bimetal heat-treated alloy steel liners with optimized profile design.

Results

Service life extended to 11.2 months (+124%)
Annual maintenance cost reduced by 68%
Power consumption decreased by 7.3%, saving 850,000 kWh/year
Reduced annual downtime equivalent to $420,000 production value