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dr. sc. (Tech.), Prof., orcid.org/0000-0002-6159-6819, ya. g. Kuvaiev 1 , cand. sc. (Tech.), assoc. Prof., orcid.org/0000-0003-4981-346x, n. s. Pryadko 2 , dr. sc. (Tech.), senior research fellow, orcid.org/0000-0003-1656-1681Purpose. For an operator exception out of a concentration process control circuit to identify the patterns that determine the indicative events characterizing the process state along the control channel "useful mineral content in the ore -useful mineral content in a concentrate" in an ore-concentrating plant with autogenous grinding (AG).methodology. Correlation analysis of the control object parameters: the technological process at the concentrating plant with AG.findings. According to the type and parameters of the correlation functions between the useful mineral content in the feedstock and concentrate, a number of indicative events characterizing the process state along the control channel "useful mineral content in the ore -useful mineral content in the concentrate" were identified.originality. The control regularities of concentration process control by comparing the numerical values of the decay time and the equivalent retardation of the autocorrelation and correlation functions of the total iron content and the time constant of the technological line with AG are revealed for the first time.Practical value. The obtained results can be used to construct an automatic system for situational management of ferrous and non-ferrous ores concentrating process, both at separate sections with AG, and at plants including these sections.

Based on a numerical simulation of gas flows in an ejector unit and an analysis of grinding chamber acoustic signals, this paper shows ways to increase the efficiency of jet grinding. To prevent ejector speed-up tube wear and to obtain a ground product without impurities, the effect of feeding an additional energy carrier flow on the flow pattern in the speed-up tube of a jet mill was studied. A comparative analysis of the ejector flow pattern as a function of the presence of an additional feed and the speed-up tube shape was carried out. It was shown that the use of a conical nozzle offers a more uniform flow at the ejector outlet. The additional energy carrier feed provides a uniform increase in flow speed and reduces speed-up tube wall wear. The acoustic signals of the mill working zones were related to the jet grinding process parameters, around which a ground product quality control method was developed. The paper presents a technique for determining the material particle size in the energy carrier flow from the results of acoustic monitoring of the process. The technique uses the established relationship between the dispersion of the acoustic signal characteristic frequency and the mass of the corresponding fracture of the mixture in in-flow material transportation. The technique speeds up material particle size determination and improves the finished product quality. An automatic system was developed to control the grinding process by controlling the loading process according to the characteristics of the grinding zone acoustic signals. An operating model of a controlled hopper of a gas jet mill was made. The operability of the control system was verified on a simulation model, which includes a control objet (mill) model and a control system model. It was shown that the system of mill loading automatic control by the characteristics of the grinding zone acoustic signals offers an up to 10 percent increase in mill capacity, which was verified in industrial conditions at Vilnohorsk Mining and Metallurgical Plant.

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