Theory and Practice of Developments in the Field of Separation and Extraction of Metals at Mining and Metallurgical Enterprises

Abstract The article discusses the theory and practice of development in the field of separation and extraction of metals at mining and metallurgical enterprises through the creation and implementation of mine and bunker vibrating feeders, vibrating screen feeders and new designs of screening surfaces for them, as well as devices for eliminating buildup in bunkers. New scientific and practical results of research on the substantiation of improved vibrating machines for auxiliary mining operations are presented, including: vibrating mining feeders of the PVG type; vibrating hopper feeders such as PVB and ZhVB; vibrating feeders-screens of the PGV and GPV types; sifting surfaces for them; devices for eliminating equilibrium arches and material adhesion in bunkers; complex for screening and feeding coke breeze into the crusher; vibration delivery and ballasting installations; sleeper tamping vibration installation, as well as a rock mass transfer point in the quarry. A new mathematical model of the tamping process and a method for improving the tamping mechanism are proposed, which will increase the productivity of the sleeper tamping vibration installation. New vibration complexes make it possible to reduce the energy intensity of crushing by 15% and reduce the wear of the working surfaces of the crusher. It is shown that the construction of transfer points is carried out without additional preparation of the entire working bench. The operational capacity of the warehouse is selected within the range of 15–25 thousand m3 of rock mass. when used for loading iron ore cars with EKG-8I excavators with a daily productivity of up to 5000 m3, the warehouse stock is 3-5 days. The minimum specific energy intensity of release and loading of one ton of rock mass at the maximum value of productivity is ensured at frequencies of forced oscillations of the system ω = 15.5–17.5 Hz. The efficiency of the feeder-screen operation with spatial oscillations of the working body created by two multidirectional driving forces applied at two points at a distance from each other equal to 0.5 was determined. the width of the working body increases by 15%. Developers of technical documentation – SE “UkrNIPIIpromtekhnologii” (Zhovti Vody, Ukraine); Manufacturers: Krivoy Rog Ore Repair Plant (Krivoy Rog, Ukraine); Mechanical repair plant of the State Enterprise "Vostok GOK" (Zhovti Vody, Ukraine); Mechanical repair workshops of quarries, mines and processing plants, etc. It has been established that the research results represent a step in the theoretical generalization of the problem of developing the theory of interaction of grinding media in the grinding chambers of mills and increasing the efficiency of equipment for fine grinding of rocks, which is important for mining and metallurgical enterprises.