Progress with Grinding Aids for Vertical Roller Mills
At unchanged separator settings, theincreaseof ΔPmill indicates more internal circulations and more fines.As a result of the higher ΔP mill, the mill vibration increases (8-10mm/s), which results in a good opportunity to test the effect of the grinding aid. In contrast to tests with ball mills, the effect of grinding aids in a VRM is already visible and audible after 10-20min.
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