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SAG Mill Circuits The use of modelling and simulation has become routine in the design and optimisation of AG and SAG mill circuits. One of the most widely used models for this purpose is the so-called "variable rates" model (Morrell and Morrison, 1996). A more up-to-date version has also been developed with enhanced predictive
HPGR vs. SAG Advantages • Significant energy cost savings • Reduced grinding media consumption • Reduced overall operating costs ... Plant Concept SAG Circuit HPGR Circuit Equipment 1 x SAG Mill 9.8 MW 1 x Secondary Crusher 750 kW 1 x Pebble crusher 450 kW 1 x HPGR 4.0 MW 2 x Ball Mills 5.6 MW each 2 x Ball Mills 5.6 MW each ...
Mine-to-Mill optimisation at Mont Wright J Hi/11, R Ouellet2, R Deslias3, I K Kapinga4, P O Devin5, H Achache6, W Valery7, R Hayashida8, T Farmer, B Bonfi/s10 and K Duffy11 Director Mining Services, ArcelorMittal Exploitation miniere Canada, Fermont (Quebec) GOG 1JO, Canada. ... SAG vs HPGR. Published in Proceedings of the …
The most common benefit cited for HPGR is a higher energy efficiency than tumbling mills; often this is a very simplistic "1.5 kWh/t in HPGR versus 5.0 kWh/t in SAG".
Optimise your pebble crushing with HPGR. High Pressure Grinding Rolls offer an energy-efficient way to crush pebbles and alleviate bottlenecks caused by mills struggling to reduce the stubborn particles of hard ore. Whether recirculated through primary milling or separated and sent to a dedicated downstream pebble mill, pebble crushing is an ...
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 ...
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 ...
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 ...
HPGR vs. SAG Advantages Less • Significant energy cost savings Energy • Reduced grinding media consumption ... Equipment 1 x SAG Mill 1 x Secondary Crusher 9.8 MW 750 kW 1 x Pebble crusher 1 x HPGR 450 kW 4.0 MW 2 x Ball Mills 2 x Ball Mills 5.6 MW each 5.6 MW each Screens and conveyors Screens and Conveyors 0.5 MW 1.5 MW.
tertiary crushing application. • More efficient grinding than Ball Mill. • Utilising more of the capability of the. HPGR to deliver finer product size. • Compared to conventional HPGR circuit. • 15 – 20% Reduction in direct energy. • 23 – 25% Reduction in comminution costs. Savings Savings. Direct energy: 30% – 40% Direct energy ...
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 ...
Process optimisation for your SAG Mill Total Cost of Ownership Tool Transfer Point Alignment Automation Back. QCX® Advanced Quality Control Systems. Back ... and even enhance the performance of …
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, …
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 ...
HPGR circuits can reduce the hard rock mining industry's CO 2 emissions by up to 43.5% compared to SAG/Ball mill circuits. • Analysis of published data has …
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 ...
M. Bueno, B. Foggiatto, G. Lane SAG Conference Vancouver, Canada September 22 – 26, 2019 ABSTRACT This paper presents an assessment and trade-off study of high-pressure grinding rolls (HPGR)-based vs. autogenous grinding (AG)-based milling options for a 65 kt/d copper/gold project. The study rel...
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 ...
HPGR vs. SAG Advantages • Significant energy cost savings • Reduced grinding media consumption • Reduced overall operating costs • Reduced footprint • Higher …
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 …
Of note, an HPGR circuit's mode of operation is fundamentally different to that of SAG mill. As a largely volumetric machine, the comminution specific energy in an HPGR is a function …
Within comminution circuits, High Pressure Grinding Rolls (HPGR) are increasingly replacing conventional SAG, rod and ball mills for hard rock reduction – owing to their substantially lower energy consumption and potential for significant total cost of ownership reduction. Not only do they require as much as 40% less energy than traditional …
1 INTRODUCTION It is generally recognised that the most accurate means for predicting the specific energy of grinding circuits is to pilot them. However, one of the major …
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
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: …
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
Specialties: Comminution Circuit Design, Comparing HPGR, SAG Mills, AG Mills, Crushers 1) Conventional HPGR Vs.. SAG trade off studies. 2) CB Vs. SAB Vs. SABC Vs. 2C/SAB Vs. 2C/HPGR/BM Vs. SS SAG Vs. ABC Vs. SS AG. 3) Effect of Secondary Crushing and Blasting. 4) Diamond Processing HPRC Vs. AG mills and Conventional …
The discharge grates of the SAG mill were identified as a key component in the SABC circuit, and their design is a crucial factor in the mill's performance [17,18,19,20,21]. The initial design of the grate section caused a serious accumulation of pebbles within the SAG mill which contributed to a decreased grinding efficiency. The …
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 ...
SAG Mill Circuits The use of modelling and simulation has become routine in the design and optimisation of AG and SAG mill circuits. One of the most widely used models for this purpose is the so-called "variable rates" model (Morrell and Morrison, 1996). A more up-to-date version has also been developed with enhanced predictive
Hello: I would like to start a new discussion. When HPGR should be used instead of SAGs in a grinding circuit. What are the technical advantages, sensitivity to feed distribution, hardness of ore, efficiency etc? What are the trade …
HPGR or SAG? Choosing an appropriate grinding configuration is important for conceptual design. Here are some things to consider when making the choice between an HPGR …
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 …
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