Ball Mill Operation -Grinding Circuit Startup & Shutdown ProcedureSep 7, 2017 . Open barren solution shut off valve to ball mill. Open gland water valve to the appropriate cyclone feed pump. Put density controller on MANUAL mode and set the output to 20%. Set the setpoint to 50-55% solids. Start the appropriate cyclone feed pump. Put flow controller in MANUAL mode and set output.ball mill operation tutorial,Building a Ball Mill for Grinding Chemicals - TutorialTubAug 11, 2007 . Commercial ball mills can cost more than $100, but with this tutorial you'll be able to make one that works just as well for no more than $30! . container is dependent on how large of an operation you want to run, but keep in mind its maximum size is also somewhat dependent on the power of your motor.