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The median diameter of the matcha ground by a stone-mill and a ball-mill and a fine matcha was 15-20μm, and that of a matcha ground by a jet-mill and a fine matcha was under 5μm.raymond wet ball mill features - jefflebobasketballcamp,Jul 21, 2018 · rock wet ball mill equipment features collegesinohio . You may be interested grinding mill vertical mill ball mill super thin mill high quality grinder mill machine and raymond mill for grinder mill process ball mill.What is a ball mill? What are its uses and advantages? - Quora,The ball mill is a key equipment to grind the crushed materials, and the ball mill is widely used in powder making production line including cement, silicate, new-type building material, refractory material, fertilizer, ore dressing of ferrous metal and non-ferrous metal, glass ceramics, etc, and the ball mill can grind various ores and other materials with dry type and wet type.