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  • A comparative study on the effects of dry and wet grinding
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    nbsp 0183 32 In a feasibility study dry grinding of magnetite ore for particle production from 50 mm to 90 181 m was performed by using HPGR Results showed that two stages HPGR followed by dry grinding in a closed circuit with 7 and 1 mm screens could reduce energy consumption by...

  • Assessment of greenhouse gas mitigation options for the
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    nbsp 0183 32 In Canada all iron processing plants use an autogenous AG or semi-autogenous SAG mill and a ball mill circuit In the HPGR scenario a milling circuit consisting of HPGRs and a ball mill is considered with a 21 electricity savings as HPGRs require less energy to achieve the same degree of size reduction as an AG or SAG mill Ballantyne et al 2018 McNab et al 2009...

  • Stirred media mills in the mining industry Material
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    nbsp 0183 32 However in ore processing applications it is conventional to use the 80 wt passing size P 80 to represent the particle sizes at different stages in comminution This is easy to measure i e weighing the separated fractions after sieving although two P 80 values can have vastly different size distributions and therefore differ greatly in mean particle sizes...

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