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Feeding size lt;25mm, discharging size 200 mesh425 mesh Q: I need silica grinding mill, do you have9 A: Yes, we have designed and export many this kind mills, for quartz grinding, 40100 mesh, Fe free. 2 Adjust the rotation speed Q: How long need I to change the balls and liners9 A: Balls and liners service time depending on your raw material, we will quota you clearly after got your inquiry