Experimental research and methods for increasing the energy efficiency of ventilation systems of pneumatic systems at enterprises of the mining and metallurgical complex

Energy efficiency of ventilation systems of pneumatic aspiration and enrichment systems, development of industrial testing methods, structuring of costs, methods and means of their reduction is an urgent task of increasing the competitiveness of enterprises of the mining and metallurgical complex of the Russian Federation. An analysis of similar studies shows that they do not contain any results on the impact of uncontrolled recirculation on the efficiency of ventilation systems. Technological audit of the pneumatic system of aspiration and enrichment of chrysotile asbestos of the enrichment shop of JSC «Kostanay Minerals» showed low energy efficiency of the ventilation system, a significant volume of uncontrolled air recirculation. A significant influence of the relative position of the fans and the design features of the outlet dampers, their non-tightness on the energy efficiency of the ventilation system was established. The decrease in the aerodynamic parameters of the fans in relation to their passport characteristics amounted to η = 13%, for efficiency, Р = 23% for static pressure, N = 8% for power. The
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article proposes a methodology for calculating the criteria for assessing the energy efficiency of a fan complex and ways to improve it based on the equations of material and energy balances taking into account the information matrix, leaks, and the construction of nomograms for consumption and losses of the energy carrier. It is calculated that it is theoretically possible to achieve the efficiency of the fan complex up to the values: ηВК = 0,71. Following the implementation of technical measures to modernize the fan complex of the pneumatic aspiration system and enrichment of the enrichment shop of Kostanay Minerals JSC, its energy efficiency was increased by 24% to ηВК = 0,5, which made it possible to reduce the number of operating fans from 12 to 10, ensuring savings of 2.5 million kW/year of electricity.

Makarov V. N., Nurkhozhaev E. S., Makarov N. V., Akhmetov R. G. Experimental research and methods for increasing the energy efficiency of ventilation systems of pneumatic systems at enterprises of the mining and metallurgical complex. MIAB. Mining Inf. Anal. Bull.2025;(12-1):32-47. [In Russ]. DOI: 10.25018/0236_1493_2025_121_0_32.

V.N. Makarov¹, Dr. Sci. (Eng.), Assistant Professor, e-mail: uk.intelnedra@gmail.com, ORCID ID: 0000-0002-3785-5569,
E.S. Nurkhozhaev², Chairman of Board, e-mail: info@km.kz,
V. Makarov¹, Cand. Sci. (Eng.), Assistant Professor, e-mail: mnikolay84@mail.ru, ORCID ID: 0000-0001-7039-6272,
R.G. Akhmetov², Chief Mechanic, e-mail: Rus.akhmetov@mail.ru,
¹ Ural State Mining University, 620144, Ekaterinburg, Russia,
² JSC «Kostanay Minerals», Zhitikara, Republic of Kazakhstan.

V.N. Makarov, e-mail: mnikolay84@mail.ru.

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