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HPGR High Pressure Grinding Rolls
HPGR is typically used in a third-stage or fourth-stage crushing application ahead of grinding. You could always try to build a circuit doing 45 µm classification, but I suspect your circulating load would be overwhelming. Most HPGR applications in hard rock mining achieve 3000 µm to 7000 µm product
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Video: Building the world's largest HPGR
The design concept came to fruition in the HRC™3000, the largest HPGR in the world with a total installed weight of 900 tons. The HRC™3000 includes 3.0 m diameter by 2.0 m wide rolls and a total installed power of 11,400 kW. Depending on the application, the total capacity of this machine can exceed over 5,400 tph of ore.
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HPGR Pro
HPGR Pro: next-gen machine with game-changing features and benefits. With more than 150 HPGRs installed worldwide in mining applications, this next-gen machine boasts game-changing features resulting in up to 20% increased throughput capacity, 15% energy savings, and as much as 30% extended roll life.
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Variable speed drives for HPGRs
High pressure grinding rolls (HPGRs), also known as roller presses, are rapidly gaining acceptance in hard-rock processing, primarily due to their energy efficiency when applied in comminution. Today's highly competitive mining industry calls for continuously operating high throughput equipment, such as the HPGR, to be designed for maximum ...
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