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    HPGR or high-pressure grinding rolls have made broad advances into nonferrous metal mining. The technology is now widely viewed as a primary milling alternative, and there arc a number of large installations commissioned in recent years. After these developments, an HPGR based circuit configuration would often be the base case for certain ore types, such as very hard, abrasive ores.

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  • Mill (grinding) - Wikipedia

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    Accompanying to the tests, traces of wear on the roll surface are examined with a scanning electron microscope (SEM). The tests add up to an increase in wear rate, i.e., volume loss per 1000 revs, as a result of increasing grinding pressure, an increase of the maximum feedstock grain size and an increase of feedstock moisture.

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