Technical and economic efficiency of implementing a frequency-controlled electric drive for a milling installation

This paper presents an experimental approach to assessing the effect of drum rotation speed on the power consumption of a technological installation. Using the correlation method, the economic efficiency of applying a frequency converter to control the mill’s rotation speed is calculated based on experimental data showing variability in rotation speed from 9 to 12 revolutions per minute. Regression equations describing the dependence of power on each parameter are constructed, which allows for a quantitative assessment of the contribution of various factors to changes in energy consumption. The results demonstrate that energy savings can be achieved through rotation speed regulation and take into account the dependence on the hardness of the ore loaded into the drum, as well as the ratio of the liquid to solid phases of the ground ore. The economic assessment of implementing a frequency converter for MMS 70-23 mills indicates a payback period of 4.8 years, followed by profit generation.

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