The ball mill is a cylindrical device that is capable of rotating around a horizontal axis to grind different materials. The material that is to be ground together with the grinding medium are placed inside the mill. The ball grinding mill is usually made up of ceramic balls, flint pebbles and steel balls. The operation of the mill is based in internal cascading motion where the grinding balls and ore grind to reduce the size of the materials into fine powder. The industrial ball mill is capable of operating continuously with the ore being fed at one end and discharged at the other end.
The rod mill operates almost the same as the ball mills. However, it uses long steel rods instead of the steel balls as the grinding media. The steel rods grind the ore by tumbling inside the mill and spinning through parallel alignments. This simulates a series of roll crushers grinding the material. The fact that the rod mill does not cascade means that it can be operated at a lower speed compared to the ball mill. This also means that there will be a smaller void space. The rod mill has more grinding contact between the ore and the metal.
The semi-autogenous mill uses steel balls together with large rocks to grind different materials in the industries. This is one of the most common grinding mills for sale because of its comprehensive grinding feature. There is a large rotating drum that acts to throw the steel balls and large rocks in a cataracting motion. This causes the ore to be ground to fine particles due to the impact breakage of the rocks. This mill is used to grind lead, copper, silver, lead and gold. The grinding mills for sale that you choose can improve your operations greatly if you make the right choice.