Applications by Material Type > Copper & Gold Ore Crushing Solutions

Globally, copper and gold mining together account for a dominant share of the large-format crusher wear parts market. Major producers including BHP, Rio Tinto, Barrick Gold, and Newmont operate multi-line crushing circuits where mantle and concave change-out costs - measured over a mine's life - routinely exceed the original cost of the crushers themselves. Getting the alloy selection and liner profile right is not a procurement detail; it is a production-continuity decision.

DUMA engineers and manufactures cone crusher mantles and concaves, jaw crusher wear plates, and gyratory crusher liners specifically calibrated for the wear conditions encountered in copper and gold ore circuits. Every alloy batch is traceable, every profile is dimensionally verified, and every liner ships with a full metallographic and hardness certification report.

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Understanding the Wear Challenge in Copper & Gold Ore Crushing

Copper and gold ore bodies impose wear stresses that differ significantly from crushed stone or aggregate applications. Understanding these characteristics is the foundation for correct wear part selection.

Host rock hardness and silica content.

Porphyry copper deposits - which account for roughly 60% of the world's copper production (USGS, 2023) - are typically hosted in granodiorite, quartz monzonite, or related felsic intrusive rocks with Mohs hardness of 6–7 and silica content of 60–70%. This combination drives severe abrasive wear on crushing surfaces, eroding liner profiles rapidly if alloy grades are not matched to the specific ore type. Gold ores hosted in greenstone belts or skarn formations present similar challenges, often with additional competency variation between ore and waste rock zones.

High-tonnage, continuous operation.

Unlike quarry crushers that may run 10–14 hours per day, concentrator-feed crushers in copper and gold operations typically run 20+ hours per day, 360+ days per year. A liner that might last three months in a quarry may wear to a change-out condition within four to six weeks in a high-throughput copper circuit - or faster, if feed is uncontrolled.

Variable feed hardness.

Open-pit mining delivers crusher feed that mixes fresh ore, partially weathered rock, and occasional waste intrusions within the same blast pattern. This variability creates alternating impact and abrasion demands on the liner surface within the same operating shift. Alloys that perform optimally under steady abrasion conditions may crack or spall under sudden high-impact events from competent, blocky waste rock.

Large feed size at the primary stage.

Primary gyratory crushers on large copper mines accept feed up to 1,500 mm and larger. At this scale, the liner castings themselves are among the largest wear parts in industrial use - individual concave segments may weigh 2,000–5,000 kg - making dimensional accuracy and casting integrity critical. A casting defect that causes premature failure in a gyratory concave segment creates both a parts cost problem and a multi-day shutdown.

Copper and gold ore concentrators universally use multi-stage crushing circuits. The standard configuration at large-scale operations is three stages: primary gyratory → secondary cone crusher → tertiary cone crusher, sometimes followed by a high-pressure grinding roll (HPGR) or additional cone stage. Smaller operations and heap-leach gold projects frequently use a two-stage jaw + cone circuit. Each stage has distinct wear part requirements.

Primary Stage - Gyratory Crusher

Large copper and gold mines almost exclusively use gyratory crushers for primary crushing, given their superior throughput capacity (3,000–10,000+ t/h), tolerance for large feed sizes, and suitability for continuous dump-truck or apron-feeder operation. The primary wear consumables are the mantle (the rotating inner member) and the concave segments (the fixed outer ring liners, typically supplied in multiple segments per ring).

Primary gyratory liners operate in a predominantly compressive wear regime, but the sheer scale of feed material introduces significant impact loading at the feed opening. The industry consensus for primary gyratory liner alloy in copper and gold operations is Mn18Cr2 (austenitic manganese steel with 18% manganese and 2% chromium). This grade provides the work-hardening behavior essential for handling large, high-impact feed - surface hardness increases from approximately HB200 at installation to HB500+ under operational impact - while the chromium addition improves resistance to the abrasive wear generated by high-silica gangue minerals relative to plain Mn18.

For operations processing particularly hard, high-silica ores (SiO₂ > 65%), Mn22Cr2 provides additional wear reserve through a higher manganese content that deepens the work-hardened surface layer, at the cost of slightly increased susceptibility to work-hardening embrittlement in low-impact zones of the chamber. The selection between Mn18Cr2 and Mn22Cr2 should be driven by actual wear rate data from the specific deposit.

Recommended DUMA Products for Primary Gyratory Crushing:

• Gyratory Crusher Upper Mantle
• Mining Gyratory Crusher Wear Parts

Gyratory Crusher Upper Mantle

Mining Gyratory Crusher Wear Parts

Secondary Stage - Cone Crusher (Primary Recommendation)

Secondary cone crushers receive the product from the primary gyratory (typically 100–300 mm) and reduce it to a 30–80 mm product suitable for tertiary crushing or, in some gold operations, direct ball mill feed. This stage runs at higher speed and tighter closed-side settings than the primary, producing a wear profile that combines continuous abrasion across the full liner surface with moderate impact loading.

The cone crusher mantle and concave (bowl liner) are the primary wear items at this stage, and the correct profile selection - coarse, medium, or fine cavity - is as important as alloy grade for both wear life and product size control. For secondary crushing of copper and gold ore, Mn18Cr2 remains the standard recommendation for most ore types, balancing work-hardening performance with abrasion resistance. On operations where ore silica content is consistently above 65–70%, or where feed is notably competent and blocky, an Mn18Cr2 with optimized chromium carbide distribution (achieved through controlled cooling rate during heat treatment) provides improved surface abrasion resistance without sacrificing core toughness.

Liner profile selection for copper ore secondary crushing should favor a medium or coarse cavity profile to avoid packing of fines - copper ore frequently generates significant fines at the secondary stage due to the relatively soft sulfide minerals in the matrix, and chamber packing accelerates wear and reduces throughput.

Recommended DUMA Products for Secondary Cone Crushing:

• Mantle Liners
• Concave and Bowl Liners
• Mantle and Bowl Liner for Metso Cone Crusher
• Sandvik Crusher Spare Parts
• OEM Crusher Spare Parts
• GP300 Mantle Concave Bowl Liner
• Crusher Liners

 

Tertiary Stage - Cone Crusher

Tertiary cone crushers operate at tight closed-side settings (typically 8–20 mm) and high circulating loads, with a fine cavity profile and high rotational speed. At this stage, abrasion dominates over impact across the full liner surface, and work-hardening of the manganese steel surface is critical to liner life. The wear pattern is typically uniform across the parallel zone and lower mantle, distinguishing it from the more localized wear seen at the primary stage.

For tertiary crushing in copper and gold circuits, the choice between Mn18Cr2 and Mn22Cr2 should be driven by throughput data. Where high fines content in the circulating load suppresses impact frequency, Mn22Cr2's higher work-hardening capacity is an advantage. For operations with coarser, more competent tertiary feed (common in gold ore circuits where ball mill feed specifications are coarser), Mn18Cr2 provides the toughness reserve needed to handle occasional oversize. DUMA's TiC (Titanium Carbide) insert liners represent a premium option for tertiary stages with extremely high silica and abrasion rates, providing ceramic-reinforced wear surfaces where abrasion resistance is the overriding priority.

Recommended DUMA Products for Tertiary Cone Crushing:

• Titanium Carbide (TiC) Insert Bowl Liner and Concave
• High-Quality Wear and Spare Parts for Cone Crushers
• Manganese Crusher Parts
• Steel Casting Mantle and Concave

 

 

 

 

 

Primary Stage for Smaller Operations - Jaw Crusher

Junior gold mining operations, heap-leach copper projects, and toll-processing facilities frequently use jaw crushers as the primary crushing stage, given their lower capital cost, simpler maintenance, and suitability for smaller throughput ranges (200–1,500 t/h). Jaw crushers are also common in remote locations where gyratory crusher installation and maintenance infrastructure is impractical.

For hard-rock gold ore and copper ore jaw crushing, jaw plates manufactured from Mn18Cr2 are the standard recommendation. The jaw crusher's reciprocating compression action generates intense impact peaks when handling competent, blocky ore - the primary failure mode for jaw plates in this application is tensile cracking from impact shock, not abrasive surface wear. Mn18Cr2's superior toughness-to-hardness balance makes it substantially more reliable than high-chrome iron in this context. Cheek plates (side liners) should be replaced concurrently with jaw plates to maintain consistent chamber geometry.

For jaw crushers processing gold ore with high quartz vein content (SiO₂ mineralization as the primary gangue), corrugated or wave-profile jaw plates improve material grip and reduce plate surface abrasion relative to flat-profile plates, extending change intervals in abrasion-dominated wear regimes.

Recommended DUMA Products for Jaw Crushing Stage:

• Jaw Crusher Liners
• Jaw Crusher Parts – Fixed Jaw Plate
• Mining Jaw Crusher Part (Sandvik JM/CJ Compatible)
• C160 Wear Part (Metso C Series Compatible)
• Cheek Plates and Side Liner Plates

The following summary reflects industry consensus across major mining equipment OEMs and metallurgical research, including guidance aligned with standards from the Society for Mining, Metallurgy & Exploration (SME) and published wear research from institutions including the Julius Kruttschnitt Mineral Research Centre (JKMRC):

• Key selection principle: In copper and gold ore applications, never select liner alloy based solely on hardness. The work-hardening capacity of austenitic manganese steel - its ability to harden progressively from HB200 to HB500+ under operational impact - is what distinguishes it from harder but brittle alternatives. A liner that chips or cracks under unexpected impact events creates a shutdown; a liner that wears predictably creates a planned change-out schedule.

Copper and gold ore crushing operations run on tight margins measured in cost per tonne of ore processed. The right wear part specification - correct alloy, correct profile, correct installation - directly reduces that cost. The wrong specification creates emergency shutdowns at the worst possible time.

DUMA's technical team is available to review your specific ore characteristics, crusher models, and current change-out intervals to recommend the alloy and profile combination that will deliver the lowest total cost per tonne for your operation.

Contact DUMA for a Copper & Gold Ore Wear Parts Consultation →