Engineered Grinding Media · Mill OptimizationChina · Central Asia · Global Support
APPLICATION CASE

Case Study of High Hardness & Low Wear at a Large Copper Mine

Goldpro high-hardness forged balls (surface hardness ≥60 HRC) were tested against locally produced Russian balls in an MQY 3.6 × 4.0 m mill (June–October 2025; 180,200 tonnes processed). Specific consumption fell by 32.6% for 100 mm balls and 39.7% for 60 mm balls, while throughput and power consumption remained stable.

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Ore typeCopper Ore
Grinding stageMQY 3.6 × 4.0 m mill; initial charge of 60, 80, and 100 mm balls, with 100 mm balls added to the first stage and 60 mm balls to the second stage during routine replenishment.
Primary objectivesIntroduce higher-quality products · Maintain production stability while reducing overall grinding media costs · Validate a cost-effective alternative to locally manufactured grinding balls through direct comparison.
Validation methodFull-Cycle Parallel Trial: Compared Goldpro and Russian-made grinding balls in the same mill, using the same ore and operating parameters. Trial period: June 23–October 27, 2025; total ore processed: 180,192.05 tonnes.
CHALLENGE

The existing grinding balls had low hardness, high specific consumption, and high replenishment requirements, highlighting the need for a cost-effective, wear-resistant solution for hard-ore conditions.

Baseline Specific Consumption: 0.445 kg/t for 100 mm balls and 0.335 kg/t for 60 mm balls, resulting in high consumables costs.

①High Grinding Ball Consumption: Baseline specific consumption was 0.445 kg/t for 100 mm balls and 0.335 kg/t for 60 mm balls, driving up consumables costs.
②Low Hardness and High Wear: The existing balls had relatively low hardness, resulting in high wear and substantial monthly replenishment.
③High Operating Costs: Grinding ball procurement costs remained high at the same throughput, increasing overall grinding costs.
④Lack of a Cost-Effective Alternative: No suitable, cost-effective wear-resistant media solution was available for high-hardness ore conditions.

SOLUTION

We achieve optimization through these methods

High-Hardness Forged Grinding Balls (≥60 HRC)+Full-Cycle Comparative Trial Protocol+On-Site Technical Support and Monitoring

① Goldpro supplied high-hardness forged grinding balls with surface hardness ≥60 HRC and volumetric hardness 59 HRC, tailored for hard grinding conditions;
② Complete data comparison against Russian-made grinding balls under identical mill, ore, and parameter conditions to establish the optimal make-up ball charging regime;
③ On-site technical tracking recorded net running hours, hourly throughput, power consumption, and grinding ball wear to generate standardized test reports.

IMPLEMENTATION

Full-Cycle Parallel Comparison with Local Supplier Products, Validated Through Comprehensive Industrial Trials.

Benchmarking under Identical Mill, Ore, and Operating Conditions, with Official Report Verification.

  1. Establishing the Ball Size Distribution, Charging Plan, and Monitoring BaselineInitial charge with 60, 80, and 100 mm balls; replenish with 100 mm balls in the first stage and 60 mm balls in the second. Monitor throughput, power consumption, total grinding ball consumption, and specific consumption per tonne of ore throughout the trial.
  2. Comparative Trial of High-Hardness Forged Grinding BallsGoldpro high-hardness forged grinding balls were evaluated against Russian-made balls under identical mill and operating conditions, with comprehensive data comparison throughout the trial.
  3. On-Site Monitoring and Trial ReportingRecorded net operating hours, throughput, power consumption, and grinding ball consumption throughout the trial, producing standardized trial data sheets and an official industrial trial report.
MEASURED RESULT

Comprehensive Risk Mitigation and Scalable Replacement Solution

Eliminated the Risk of High Consumables CostsSpecific grinding ball consumption decreased significantly year-on-year, reducing the mine’s long-term grinding media procurement budget.
Eliminated the Risk of Process Performance FluctuationsMill throughput and grinding power consumption remained stable after replacement, with no adverse impact on processing capacity or energy performance.
Eliminated the Risk of Substandard Grinding Media PerformanceValidated by a comprehensive official industrial trial report, with hardness and wear resistance meeting the requirements for continuous on-site production.
Mitigated the Risk of Single-Supplier DependencyOfficially accepted for long-term, large-scale replacement of imported Russian grinding balls, diversifying supply sources.