Authors: Levytskyi A.P., Khmel Y.V., Dyrda V.Y.,
Kalashnikov V.A., Holovko L.H.
For ore mining and processing enterprises, with a modern deterioration in the conditions for the development of mineral deposits, the need to involve in processing ores with a reduced content of the useful component and, consequently, an increase in the volume of processing of the raw materials, it is very important to increase the productivity of the ore preparation departments and, first of all, the grinding departments. In the cost of iron ore concentrate energy for grinding ore in mills is more than 50%. It is known that the energy intensity of rocks is directly proportional to the square of strength and inversely proportional to the modulus of elasticity. It is also known that the compressive strength of the rock is about 7-10 times greater than the shear strength. Thus, if we consider the physical nature of the process of destruction, then the following principle must be observed in the technology of crushing: the destruction of the rock must be carried out by creating predominantly shear stresses.
