​Strudex Ceramic-Reinforced Discharge Cone Segment

Introduction: The Role of Mill Liners in Mineral Processing

Rubber or poly-met mill linings are essential components that protect mill shells from abrasion and impact while lifting grinding media in AG, SAG, and ball mills. Optimized liners increase throughput and equipment uptime, with specialized designs reducing maintenance times. Common types include shell plates, lifter bars, and pulp discharge systems.

Among these, the discharge cone plays a uniquely demanding role. Located at the mill outlet, it must withstand high-velocity slurry flow, abrasive fines, and occasional impact from grinding media—all while maintaining a consistent discharge gap. Failure here leads to immediate mill downtime and costly liner replacement.

The Challenge: Short Lifespan of Standard Discharge Cones

In a Metso φ10.4m SAG mill—a workhorse of large-scale copper, gold, and iron ore operations—standard discharge cone segments typically last 6 to 12 months under normal operating conditions. After month eight, wear accelerates. The discharge geometry distorts, slurry flow becomes unpredictable, and unplanned inspections multiply.

Every unscheduled shutdown costs:

- Lost production (often 2,000–5,000 tons per hour)

- Maintenance labor and crane hire

- Safety risks from confined space entry

Mine operators need a better solution. Strudex delivers it.

Our Solution: Ceramic-Reinforced Discharge Cone Segment for Metso φ10.4m SAG Mills

The Strudex Ceramic-Reinforced Discharge Cone Segment is purpose-engineered for the unique wear profile of large-diameter SAG mills. By integrating high-density ceramic tiles into a ductile metal matrix, we create a composite surface that actively resists:

- Abrasion from fine slurry

- Erosion from high-velocity discharge flow

- mpact from stray grinding media

Key specifications:

- Compatible with: Metso φ10.4m SAG mills (retrofittable to existing bolt patterns)

- Material: Ceramic-enhanced alloy steel

- Service life: 18–24 months in real-world operation

- Installation: Direct replacement for standard segments

Real-world result: In active mine sites, Strudex segments consistently outlast standard liners by 100% or more. One copper mine in Chile reported 22 months of continuous service without a single discharge cone failure.

How Strudex Compares: Rubber, Composite, Magnetic, and Ceramic-Reinforced Liners

Not all mill liners are equal. Below is a direct comparison of four common liner technologies, with a focus on discharge cone applications in large SAG mills.

Rubber Liners

Best for: Ball mills, secondary grinding, low-impact zones.

Limitation for SAG discharge cone: Rubber tears under sharp media impact and high slurry velocity.

Composite Liners (Steel + Rubber)

Best for: Compromise solutions where weight and wear both matter.

Limitation for SAG discharge cone: The rubber component still degrades faster than ceramic; lifespan remains below 15 months in high-tonnage mills.

Magnetic Liners

Best for: Specific high-wear areas, secondary mills, or where bolt-hole failure is frequent.

Limitation for SAG discharge cone: Magnetic hold may fail under extreme vibration; limited track record in φ10.4m SAG mills.

Strudex Ceramic-Reinforced Liners (Our Solution)

Engineered for Metso φ10.4m SAG Mills – Drop-in Replacement

The Strudex ceramic-reinforced discharge cone segment is designed as a **direct retrofit** for Metso’s original equipment. No mill modification is required.

Installation highlights:

- Same bolt-hole pattern and dimensions

- Compatible with existing bolt and seal kits

- Standard torque specifications apply

Quality assurance:

- 100% dimensional inspection before packing

- Hardness testing per ASTM standards

- Ceramic adhesion validation