“Energosteel” сompany successfully tested an experimental batch of 100mm balls on the impact resistance. This kind of grinding balls manufactured from high carbon alloy steel and correspond to the fifth group of hardness according to DSTU 8538: 2015.
Fifty balls have been selected from a batch for the experiment. The tests on the impact resistance performed using a drum kit (named the Koper) of the vertical type. The operating principle of the Koper based on definition expended operation for destruction of the grinding ball by a free fall hammer (load with certain weight). As a result of the test, each selected ball sustained the total impact energy of 165 375 J without destruction.
These balls during their operation do not break, have uniform deterioration and keep their shape. These properties help to reduce consumption of grinding balls, increase mill productivity and quality of the raw material grinding.