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• 20:42, 25 May 2026 Alex Doll talk contribs created page HPGR or SAG (Created page with "== 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-ball mill circuit and a SAG-ball mill circuit. ===Work index ratios === Having a hard ore is not a valid reason for choosing an HPGR circuit, the ore must be hard in a certain way. More specifically, it should have a rod mill work index greater than the ball mill work index, and a ball mill work i...")