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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.
wiki.sagmilling.com/index.php/HPGR_or_SAG%3F - People also ask
How HPGRs compare to conventional milling | Weir
WebWithin 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 …
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HPGR vs SAG - Grinding & Classification Circuits
WebHPGR may be after 5...10 years. Why? SAG mill drinks water more them HPGR. Water consumption of SAG nearly 1.0 m3/t (with thickener), …
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Energy and Cost Comparisons of HPGR-based …
WebA 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: …
WebHPGR vs. SAG Advantages • Significant energy cost savings • Reduced grinding media consumption • Reduced overall operating costs • Reduced footprint • Higher mechanical …
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HPGR - 911 Metallurgist
See more on 911metallurgist.comThe largest HPGR Polycom in operation (Figure 5) using a maximum roll diameter of 2.2 meters is processing diamond-bearing rocks in Australia at a maximum feed rate of 600 to 800 mt/h with a top feed size of 150 millimeter (6″). This rock material is reduced in one pass to 57% -1 millimeter with a pow…- Estimated Reading Time: 10 mins
HPGR or SAG? - SAGMILLING.COM
WebThe 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 …
WebA HPGR trade-off study is now part of the typical due diligence process when assessing the suitability of SAG milling circuits, particularly for large-scale, hard rock applications with …
WebThis paper will present a structure for comparison of the energy requirements for HPGR versus SAG mill considering complete circuits for comminution of precious and base …
Webconventional semiautogenous (SAG) milling, especially if ore is very hard. SAG mills are extremely sensitive to variation in ore strength, and hard ore processing may consume …
WebKey benefits. Higher grinding eficiency compared to horizontal grinding mills. Stabilizes grinding operations when faced with high ore variability. Reduces the need for, and …
HPGRs Grind Out Larger Role in Plant Productivity | E …
WebThe study also showed that the HPGR circuit could be implemented for slightly less initial capital and equipment costs versus the conventional SAG mill circuit. The new circuit requires a lower connected power load, …
WebABSTRACT. Despite the claims of energy efficiency and the considerable development that has gone into dramatically extending rolls’ life and facilitating rolls’ change-out, in the six …
WebAbstract . In the past 20 years, the energy-efficient comminution technologies, including high pressure grinding rolls (HPGR) and high speed stirred mill, have been developed …
High-pressure grinding on a whole new level - Canadian Institute …
WebAug 31, 2016 · FCX chose an HPGR over a SAG mill for its expansion because the technology, which crushes ore between two cylinders – or rolls – is about 30 to 50 per …
WebThe results showed that the HPGR - ball mill circuit achieved a 21% reduction in energy consumption over the existing SAG - ball mill circuit at the same P80 grind size of 160 …
Getting the Most From Milling Operations | E & MJ
WebWhile horizontal tumbling mills have considerable market share in the grinding space, high pressure grinding rolls (HPGR) have earned their stripes in certain applications and they …
(PDF) Predicting SAG/AG Mill and HPGR Specific Energy …
WebAug 21, 2005 · A rock breakage test has been developed that can help predict autogenous (AG) and semi-autogenous (SAG) mill performance in situations where only limited …
WebABSTRACT. The Cadia Mine again leads process design with the first truly hybrid HPGR-SAG circuit upgrading the circuit that had the world’s first forty foot SAG Mill. The hybrid …
WebHigh Pressure Grinding Rolls (HPGR) POWER-BASED EQUATIONS. General. The approach divides comminution equipment into three categories: Tumbling mills, eg AG, …
WebIn 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...
Web3.3.1 AG/SAG Mills The power-based approach to design uses a methodology which, given certain ore breakage characteristics, predicts the specific energy for a particular AG/SAG …
HPGR vs. SAG mill TetraTech comparison ... will the CUU FS …
WebSep 29, 2012 · The circuit at Cerro Verde incorporates four HPGR units (2.4 m diameter x 1.6 m wide, 5000kW) processing 2500 tph instead of the traditional SAG mill circuit. The …
WebHPGR Tradeoff Studies Usually grinding circuits are sized for a homogenous ore Constant A*b, SPI, Wi, etc., Usually evaluated for a fixed tonnage No variability is incorporated …
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