Hpgr Vs Sag Mill

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 …

However, the design project includes a trade-off study between SABC and Crushing/HPGR/ball mill circuits. Hence in this particular example, as Bond crushing and ball mill work index tests cannot be used to size SAG mill and HPGR circuits the project cannot be carried out and the ore charcaterisation programme has to be re-done with …

Bob Mathias 8 years ago Like An HPGR cannot replace a SAG mill. Also required to get the feed into the HPGR is a secondary crusher (s) and perhaps a tertiary crusher (s). The …

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 …

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 ...

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

The total power for the HPGR system can be compared to that of a conventional circuit, based on the rod and ball mill work indices and the Third Theory of comminution. The power comparison can also be done against AG/SAG mills. This methodology has only been used to scope the potential energy savings of HPGR at small …

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 …

The third comminution circuit, representing a new installation option, also includes a HPGR but does not feature a SAG mill. Instead the HPGR is used to generate two product size fractions, one ...

This paper presents a case study of one Chilean ore that underwent both HPGR and SAG mill bench-scale testwork. Interpretation of the HPGR "microcracking" was conducted using the same phantom ...

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. ...

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 HPGR exposes feed material to very high pressure for a short amount of time. The compression typically causes the rock to crack ...

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 ...

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 …

An HPGR cannot replace a SAG mill. Also required to get the feed into the HPGR is a secondary crusher(s) and perhaps a tertiary crusher(s). The HPGR is often a quaternary crushing device which is the reason that the footprint for an HPGR plant is so large. To place a ball mill or a VERTIMILL directly on the HPGR product may work on soft iron ...

Abstract. In the past 20 years, the energy-efficient comminution technologies, including high pressure grinding rolls (HPGR) and high speed stirred mill, have been developed and adopted in the hard-rock mining operation in order to reduce the energy consumption and improve the process performance.

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.

Shelley, Davies, Olivier and Atta Danso ABSTRACT This paper reflects on how measurements from inside an operating SAG mill might be used to better understand throughput, mill wear and energy dissipation within the mill. ... SAG vs HPGR. Published in Proceedings of the IMPC2020 Congress, SAIMM Authors Senchenkoa, Kulikov …

In addition to the operational cost savings, the introduction of a second on-line HPGR would result in an increase in the availability of the plant from the conventional SAG mill process availability of 91 to 96 percent. With HPGR in place, the power requirements of the grinding circuit would be reduced by more than 4kWh/tonne.

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 ...

Technical Information. Information about sample size, calibration, precision and accuracy. The SMC Test® is the most widely-used comminution test in the world for AG & SAG Mills, HPGRs and Crushers. The SMC Test® was developed to provide a range of useful comminution parameters through highly controlled breakage of rock samples.

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 …

Lab-scale HPGR 0.256 12.7 BQ 3.35 4007 360 Locked-cycle Y Y SPT N/A 19.1 BQ 3.35 10 7 Locked-cycle Y Y HPGR Pilot Plant 0.96 50 - Various >2,000 >2,000 Continuous Y Y Bond Rod Mill 0.305 12.7 Any 1.18 15 10 Locked-cycle Y Y Bond Ball Mill 0.305 3.35 Any 0.149 10 5 Locked-cycle Y Y Mod Bond 0.305 3.35 Any N/A 2 1.2 Batch N Y

2. Description of a HPGR A HPGR is principally a horizontally mounted double-roll mill, equipped with hydraulic pistons on one side, pressing against the floating roll - the other roll being fixed in the frame. The main components of the machine are of course the rolls, the bearings, frame, pressure beams, hydrau-

A few years ago, Freeport-McMoRan Inc. (FCX) chose high-pressure grinding rolls (HPGR) over a semi-autogenous grinding mill for the expansion of its Morenci open-pit copper mine in Arizona. In February of this year, Iamgold announced it too would be using HPGRs at its new Côté Lake project in northern Ontario. The same month, Altura Mining …

3.3.1 AG/SAG Mills The power-based approach to design uses a methodology which, given certain ore breakage characteristics, predicts the specific energy for a …

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 ...

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 …

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 …

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 circuits against the SAG-crush-Ball mill and against the Crush--Ball mill circuits . has the largest HPGR in the world today. I suggest to Contact . There are numerous papers related to this matter.