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  • convert mohs to hardgrove grindability index

    mohs hardness hardgrove grindability correlation hardgrove grindability index iron ore Bond Rod Mill Grindability Test The test determines the Bond Rod Mill Work Index which is used with Bonds Third Theory of Comminution to calculate net power requirements when sizing ball mills Various correction factors may have to be applied The test is a ...

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    Grindability is an important factor for the characteristic of the brittle raw materials by the design the mills. As grindability depends on many unknown factors, hardgrove grindability index (HGI) is determined empirically using a sample mill, according to the following procedure. The device to measure the hardgrove grindability consists of a ...

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    correlation between the abrasion value(X2) and work index (Wi) is found to be Wi = -1.8 Ln (X2) + 11.5 with correlation coefficient of 0.80. KEYWORDS: Bond work index ± Mechanical properties of rocks ± Grinding energy- Crushing resistance 1- INTRODUCTION Comminution in a mineral processing plant, or mill, involves a sequence of crushi ng

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    Sep 15, 2004  Rock Mech. Rock Engng. (2005) 38 (2), 145–151 DOI 10.1007/s00603-004-0037-0 Technical Note Practical Assessment of the Grindability of Coal Using its Hardness Characteristics By B. Tiryaki The University of Queensland, Department of Mechanical Engineering, Brisbane, Australia Received October 30, 2003; accepted June 8, 2004 Published online September 15, 2004 # Springer

  • What is "number nine coal"? - General Questions - Straight ...

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