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HPGR and SAG mills are used to make feed for a ball mill. The HPGR usually has a coarser transfer size than a SAG, meaning it puts more load on the ball mill. The SAG mill's "phantom cyclone" effect is usually greater than the "microcracking" effect in an HPGR until you get to really hard material where both of these effects turn negative ...
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On dry SAG mills end liners: Physical modeling, DEM-based characterization and industrial outcomes of a new design. Miner. Eng. (2019) ... (DEM) to analyse the formation and evolution of wear of a lab-scale HPGR mill and to investigate how wear affects mill performance and particle breakage. By coupling the DEM model with the …
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Figure 12 – HPGR-Ball vs AG/SAG-B all Mill Circuits: 75 micron grind . IV-278 . 0. 5. 10. 15. 20. 25. 02468 1 0 1 2 1 4. DWi % 75 micr ons. 150 microns. Figure 13 – Savings in Total Energy of ...
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So far we have clarified that HPGR doesn't replace s SAG mill and hence these two machines can't be compared. We need to compare the HPGR …
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Carbon footprints of AG/SAG vs HPGR circuits3.1. AG/SAG – Ball mill circuits. Tozlu and Fresko (2015) estimated that the total installed motor capacity of AG/SAG mills in hard rock mining in 2015 was 5.8 million kW (see Fig. 1). Given that mining industry activity has been relatively slow since then, additional sales of AG/SAG mill capacity ...
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Tumbling mills are described using 2 indices: M ia and M ib Crushers have one index: M ic HPGRs have one index: M ih For tumbling mills the 2 indices relate to "coarse" and "fine" ore properties plus an efficiency factor which represents the influence of a pebble crusher in AG/SAG mill circuits.
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This paper reviews recent HPGR applications for the processing particularly of copper, gold, platinum, PGM-Ni-Cu and iron ores. HPGR technology is discussed with respect to energy efficiency. The harder the ore the greater the energy savings are likely to be. Typical energy savings of 10–20% can be expected when installing HPGR vs. a SAG mill ...
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the specific energies of AG/SAG mills, conventional crushers (primary, secondary and tertiary) and HPGR circuits respectively. Finally in Figure 4 their accuracy when combined to predict the total comminution energy of different circuits is demonstrated. In cases where the circuits contained ball mills an additional
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Integrated Mine-To-Mill Optimization of the Toromocho Operation at Minera Chinalco, Perú (R. Valle) 14:00 14:15: Paper 16 Comminution Efficiency Comparison: Cadia's HPGR-Ball Mill Vs HPGR-Sab Circuits (C. Haines) 14:00 14:15: Paper 16 Comparison of Pilot and Industrial Scale Ag/Sag Mill Performance - Case Studies on …
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Cadia's HPGR-Ball Mill Versus HPGR-SAB Circuits and Their Comminution Efficiency (C. Haines) 14:00 14:15 Paper 16 Comparison of pilot and industrial scale AG/SAG mill performance – A case study on UG2 Platinum ore (A. Mainza) 14:00 14:15 Paper 16 Using SAG Mill Vibration for Strategies and Monitoring Liner …
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A comprehensive energy and cost study compared an existing SAG mill-based circuit at the Huckleberry mine with two proposed circuits involving comminution technologies that are associated with energy efficiency: …
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AG/SAG Mill. Grinding Mechanism: Inter-particle compression. Impact, attrition and compression: Residence Time. Low-single pass: High (feed migrates through length of mill) Wet/Dry Grinding: Dry-Low moisture. Predominantly wet milling: Availability >90% -2-4 change outs pa >90% -1-2 change outs pa. Size regulated feed Required: Yes-strongly ...
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Sag Mill Advanced Process Control and Optimization Using Brainwave MPC (A. Kheradmand) 11:30 11:45 Paper 11 Optimizing Energy and Throughput for HPGR: a Case Study ... Cadia's HPGR-Ball Mill Vs HPGR-Sab Circuits (C. Haines) 14:00 14:15 Paper 16 Comparison of Pilot and Industrial Scale Ag/Sag Mill Performance - Case Studies on …
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Original circuit design SAG/AG mills and ball mills (Huckleberry SABC circuit), however very energy intensive and also energy inefficient accounting for ~80% of the overall process plant energy …
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Process optimisation for your SAG Mill. Back. Total Cost of Ownership Tool. Back. Slurry Pumps. Dorrco™ Diaphragm Pumps ... and even enhance the performance of traditional grinding mills and fixed-gap crushers. The …
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In HPGR vs. SAG comparison studies, the HPGR option is typically predicted to require less total circuit specific energy. While other methods may be applied to the conventional SAG circuit
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HPGR vs. SAG Advantages • Significant energy cost savings • Reduced grinding media consumption • Reduced overall operating costs • Reduced footprint • Higher …
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It's widely accepted that by replacing the SAG mill with an HPGR, the energy savings would be in the range of 17% to 20%, Dziedzina explained. "If an air classifier could be used to eliminate the ball mill, the efficiency would increase quite a bit, but high tonnage air classifiers haven't really been proven yet," Dziedzina said. ...
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Cadia's HPGR-Ball Mill Versus HPGR-SAB Circuits and Their Comminution Efficiency (C. Haines) 14:00 14:15 Paper 16 Comparison of pilot and industrial scale AG/SAG mill performance – A case study on UG2 Platinum ore (S. Nkwanyana) 14:00 14:15 Paper 16 PTFI & RME Collaboration: Technology Makes Mill Relines Safer and More …
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Abstract This paper examines the development of several order of magnitude trade-off studies to evaluate the application of High Pressure Grinding Rolls (HPGR) technology in …
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SAG mill circuits are directly coupled to ball mill circuits, so changing ore properties (feed size, hardness, etc.) lead to changing process bottlenecks (SAG-limited vs. ball mill-limited) For any given unit operation, an upstream or downstream bottleneck creates …
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AG/SAG mill and crusher circuit simulations through the use of JKSimMet. Independent of this it can be used in power-based calculations, which in conjunction with the Bond ... the HPGR is in open circuit, K 3 takes the value of 1.19. x1 = P80 in microns of the circuit feed
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The uptake of HPGR technology in mineral processing has been accelerated by the drive for energy-efficient comminution solutions. A HPGR trade-off study is now part of the typical …
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been noted that the HPGR has not delivered a convincing case in designs that have considered both SAG mill and HPGR grinding as contenders for the processing routes. The massive increase in materials handling issues (Powell et al., 2011a) and an increase in the number of pieces of equipment required, are major drawbacks of these HPGR circuit ...
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The high-pressure grinding rolls (HPGR) technology is increasingly being considered for hard ore comminution due to its significant benefits in energy consumption compared to conventional semi-autogenous grinding (SAG) mill circuits. It has been shown that HPGR circuits can reduce the energy requirements by 10 to 40% [1,2,3,4]. Additional ...
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HPGR test results published by Grier (1992) on gold ores from the Mt. Todd project showed significant energy savings for a HPGR/Ball Mill circuit as compared to a SAG/Ball Mill plant. 1/14 By adding a Polycom high-pressure grinding roll, the throughput of existing plants can be increased by as much as 150% while simultaneously reducing the ...
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The high pressure grinding rolls (HPGR) is a. relatively new comminution device that offers realistic potential in. dramatically reducing comminution energy requirements. As such, it is. viewed as an alternative to the existing, less energy efficient processes. such as semi-autogenous (SAG) and ball mills.
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the HPGR - ball mill circuit achieved a 21% reduction in energ y consumption over the existing SAG - ball mill circuit at the same P 80 grind size of 160 µm. At a grind of 80% passing 75 µm, the HPGR - stirred mill ... conventional SAG mill based circuits, a pilot -scale study was conducted to compare the energy ...
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The Morrell method for predicting the specific energy consumption of conventional crushing, High Pressure Grinding. Rolls (HPGRs), and tumbling mill equipment is well known and widely applied in ...
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How HPGRs compare to conventional milling. Whether you're designing a brand-new mill circuit or optimising an existing site for long-term efficiency, High Pressure Grinding Rolls offer a range of advantages over …
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