Relacionar Columnas GRINDING MACHINESVersión en línea Types of Mills por Jhony Guillermo Montesinos Cossio 1 What is a mill? 2 SAG Mill 3 Rod Mill 4 High Pressure Roll Mill 5 Ball Mill 6 Autogenous Mill It is an acronym for semi-autogenous grinding that also uses grinding balls like a ball mill. It is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes.