(1) Equipment (instrument) selection: planetary ball mill NXQM-6L;
                              (2) Tank and ball configuration: nylon tank with zirconia ball;
                              (3) Operating parameters: autorotation 500 rpm, positive and reverse operation alternately after 30 minutes;
                              (4) Grinding time: 2 hours;
                              (5) Grinding result: 100% ＜ 20 μ m ;
                              (6) Result (suggestion): The planet grinder XQM-6 can be used to grind cinnabar