Laboratory ball mill
Essa Australia
Essa manufactures a range of metallurgical laboratory size ball and rod mills to suit most applications. Included in the range is a Bond Index Mill, which has specific application in establishing the grindability of ores.
The ball and the rod mill are of essentially the same basic concept comprising a barrel mounted in a rotating yoke assembly, which is driven through a gearbox from a three phase electric motor. The barrel is pivot mounted on the rotating yoke and can be tilted for loading and discharge. A spring loaded locking pin is used to hold the barrel in its horizontal operating position. A manually operated locking mechanism ensures the removable lid of the barrel is sealed tight during operation.
The mills are supplied standard with a barrel and rotating yoke assembly and the electric motor drive all mounted on a stand with a discharge funnel and screen.
BOND TESTWORK EQUIPMENT
Internationally accepted mineral metallurgical standard test procedures to determine the physical properties of ores include the Bond ball mill work index and the Bond rod mill work index.
These are empirical indices determined by close circuit grindability tests developed by F.C.Bond in the mid 1930's. They require a specific 305mm diameter x 305mm long (inside dimensions) horizontal axis ball mill without lifters operating at 70 rpm to perform grindabilities from 28 to 500 mesh and a 305mm diameter x 610mm long rod mill with a wave type liner operating at 46 rpm to perform grindabilities from 4 to 65 meshes.
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