Relacionar Columnas GRINDING MACHINESVersión en línea Types of Mills por Jhony Guillermo Montesinos Cossio 1 Autogenous Mill 2 Ball Mill 3 What is a mill? 4 Rod Mill 5 SAG Mill 6 High Pressure Roll 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. It is an acronym for semi-autogenous grinding that also uses grinding balls like a ball mill.