New Energy-Efficient Mining Technology Could Transform Industry

New crushing technology cuts mining energy use by 40%

Mining companies face mounting pressure to reduce emissions while managing rising energy costs. A technology developed in South Australia could address both challenges. Gyratory Roller Solutions Pty Ltd has created a crushing system that uses substantially less power than conventional grinding methods.

The GRolls Gyratory Rolls Crusher applies pulsed compression forces to break down ore. Initial testing indicates it can reduce energy consumption by over 40% compared to traditional grinding equipment. For an industry where crushing and grinding can account for up to 80% of a mine site’s electricity use, this represents a significant commercial opportunity.

Mining’s comminution processes consume more than 1% of global energy supply. Consequently, equipment that cuts this demand attracts attention from operators seeking to lower both costs and carbon footprints. The technology arrives as mines worldwide work to meet net-zero commitments while extracting harder, lower-grade ores that require more intensive processing.

Moreover, the system operates without grinding media or wear liners. This eliminates ongoing consumable costs and simplifies maintenance schedules. The design also allows dry or wet operation, providing flexibility for different ore types and site conditions.

South Australia’s government has backed the development with $300,000 in seed funding. The company targets commercial availability within 12 months, positioning the technology for deployment at operational mine sites by early 2026.

How the crushing system works

Traditional ore grinding relies on ball mills or high-pressure grinding rolls that crush material through repeated impacts or compression. These methods require multiple passes to achieve target particle sizes. In addition, they generate substantial heat and consume large amounts of electricity.

The GRolls system uses a different approach. A V-profiled main drive roll works alongside a gyratory roll mounted on an eccentric shaft. This configuration creates high-frequency pulsing that applies compression, tension, and shear forces simultaneously.

Laboratory testing shows the crusher reduces over 40% of particles below 425 microns in a single pass. Importantly, it produces less than 14% of ultra-fine material below 75 microns. Excessive fines can complicate downstream processing and reduce recovery rates in flotation circuits.

The technology performs particularly well on feed material under 2.36mm. Hard porphyry copper and gold ores, which typically resist conventional grinding, have shown strong results in pilot trials. Researchers at Adelaide University’s Future Industries Institute validated these performance claims through independent testing.

Furthermore, the absence of grinding media eliminates wear component costs. Ball mills require regular replacement of steel balls and protective liners. These consumables represent ongoing operational expenses and supply chain dependencies. The GRolls design removes this requirement entirely.

The modular construction allows integration into existing processing circuits. Mine operators can install units alongside current equipment rather than replacing entire grinding lines. This reduces capital expenditure and minimizes disruption during commissioning.

Tested performance against conventional circuits

Researchers modeled the technology’s performance against a conventional HPGR and semi-autogenous ball mill circuit. The comparison used data from a New South Wales copper-gold operation. Results indicated a 20% reduction in overall energy consumption for the comminution circuit.

Total processing costs fell by nearly 50% in the modeled scenario. This calculation included energy, maintenance, and consumable expenses. Professor Bill Skinner, who co-authored the research, noted the technology could simplify processing circuits while improving sustainability metrics.

Mark Drechsler, a PhD candidate at Adelaide University and director of GRolls, led the validation work. The research received support from the ARC Centre of Excellence for Enabling Eco-Efficient Beneficiation of Minerals. This backing provided access to testing facilities and peer review processes.

The modeling assumed feed material typical of hard porphyry deposits. These ores contain valuable minerals dispersed in extremely hard host rock. Conventional processing requires fine grinding to liberate copper and gold particles, which drives up energy use.

Additionally, the GRolls system showed improved mineral liberation characteristics. Better liberation at coarser particle sizes allows earlier separation of waste rock. This reduces the volume of material requiring fine grinding and can improve overall metal recovery.

Pilot-scale testing confirmed the laboratory results. The company has operated test units on actual ore samples from multiple mine sites. These trials validated both energy performance and mechanical reliability under continuous operating conditions.

Commercial implications for mine operators

Energy costs represent a growing proportion of mining operating expenditure. Electricity prices in Australia have risen substantially over the past five years. Therefore, technologies that cut power consumption directly improve profit margins.

Comminution accounts for 80% of typical mine site energy use. A 40% reduction in grinding electricity translates to roughly 30% lower total site power demand. For a mid-sized operation consuming 50 megawatts, this could save 15 megawatts of continuous load.

At current industrial electricity rates of approximately $150 per megawatt-hour, annual savings would exceed $19 million. Capital payback periods for efficient grinding equipment typically range from two to four years. Consequently, the business case strengthens as energy prices rise.

Lower energy consumption also reduces Scope 2 emissions from purchased electricity. Mining companies face increasing pressure from investors and customers to demonstrate carbon reduction. Equipment that cuts emissions while improving economics attracts strong interest from procurement teams.

Furthermore, eliminating grinding media reduces supply chain complexity. Steel balls and wear liners require regular delivery to remote mine sites. Global supply disruptions can delay shipments and force production curtailments. Self-sufficient crushing systems remove this vulnerability.

The technology also enables dry crushing in suitable applications. Water availability constrains many mining operations, particularly in arid regions. Dry processing eliminates water consumption for grinding circuits and reduces tailings volumes requiring management.

Tailings reprocessing represents another commercial opportunity. Many mine sites hold tailings dams containing residual valuable minerals. However, retreating these materials with conventional grinding proves uneconomic. Lower-cost crushing could make tailings projects viable.

Public sector procurement criteria increasingly include sustainability requirements. Our net-zero program for carbon reporting compliance supports companies responding to PPN 06/21 and similar standards. Mining service providers that demonstrate lower emissions gain advantages in competitive tenders.

What mine operators should consider

• Energy represents 80% of typical mine site power demand, with comminution consuming the majority of this electricity.
• The GRolls Gyratory Rolls Crusher demonstrated over 40% energy reduction in laboratory and pilot testing compared to conventional grinding.
• Modeling against an operating New South Wales copper-gold mine showed 20% lower circuit energy and nearly 50% reduced total comminution costs.
• The system requires no grinding media or wear liners, eliminating ongoing consumable expenses and supply chain dependencies.
• South Australia’s government provided $300,000 in seed funding, with commercial units targeted for availability by early 2026.
• The technology operates in dry or wet conditions and integrates into existing circuits or standalone applications including tailings reprocessing.
• Independent validation came from Adelaide University researchers at the Future Industries Institute, supported by the ARC Centre of Excellence for Enabling Eco-Efficient Beneficiation of Minerals.

Planning for lower-emission mineral processing

Mining companies should assess grinding circuits for efficiency improvement opportunities. Energy audits identify which operations consume the most power and where alternative technologies could deliver savings. Comminution typically emerges as the primary target.

Operators planning expansions or new projects should evaluate emerging crushing technologies during feasibility studies. Conventional grinding assumptions may overstate capital and operating costs. Updated equipment specifications can improve project economics and reduce environmental footprints.

Existing operations can consider pilot testing on actual ore samples. Laboratory results provide initial guidance, but site-specific mineralogy and operating conditions affect performance. Pilot programs validate potential benefits before committing to full-scale installations.

Supply chain sustainability also warrants attention. Eliminating grinding media reduces embodied carbon from steel production and transport. Companies measuring Scope 3 emissions should account for consumables throughout their life cycle. Sustainable procurement support for supply chain assessment helps businesses quantify these impacts.

Water-stressed sites should investigate dry crushing options. Reducing water consumption lowers pumping costs and tailings volumes. However, dust management becomes more critical. Trade-offs between water use and dust control require site-specific evaluation.

Tailings projects merit renewed economic analysis. Improved crushing efficiency changes the break-even grade for reprocessing historic waste. Sites with large tailings inventories should model whether modern technology makes retreatment viable.

Regulatory reporting requirements continue to expand. The ESG compliance and carbon reporting services we provide help mining companies meet evolving disclosure standards. Energy-efficient equipment supports both compliance and commercial objectives.

Finally, companies should monitor commercialization progress for promising technologies. Early adoption can provide competitive advantages, but proven reliability matters more than being first. Balancing innovation with operational risk requires careful technical and commercial assessment.

Where to find additional information

The South Australian government’s innovation programs support clean technology development. Details about grants and commercialization support appear on the Government of South Australia website under economic development initiatives.

Adelaide University’s Future Industries Institute conducts minerals processing research. Information about their work on comminution efficiency is available through the University of Adelaide research portal.

The ARC Centre of Excellence for Enabling Eco-Efficient Beneficiation of Minerals coordinates research on sustainable mineral processing. Their publications cover energy efficiency and environmental performance improvements across the mining sector.

Industry bodies such as the Australasian Institute of Mining and Metallurgy publish technical papers on comminution technology advances. Their conferences and journals provide peer-reviewed research on processing innovations.

UK businesses involved in mining supply chains or equipment procurement can find guidance on emissions reporting through government resources on industrial energy efficiency and carbon reduction programs.