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.

Purpose. Summing up the results of a comprehensive study aimed at substantiating the fundamental decision making base of the control channel of "useful mineral content in ore-useful mineral content in concentrate" in automatic mode for plants, enriching poor ironcontaining ores. methodology. Comparative analysis of objective indicators of the dispersion spectra, autocorrelation and correla tion functions, technological variables, as well as amplitudefrequency characteristics of objects controlling the iron ore dressing processes and general provision synthesis of the mineral processing control system structure. Findings. Substantiation was initiated regarding the fundamental decisionmaking base without the participation of the technological process operator based on the relationship between the many states of the control object and the final series of indicative events determined with the combined use of the correlation analysis method of the process variable values and object spectral analysis of iron ore dressing control. The control strategy of these objects, indepen dent of the useful mineral liberation technology, has been determined. Originality. It was shown for the first time that for all control objects of the poor ironcontaining ores dressing, the automatic control system must be built according to the reaction on the deviation of the useful mineral content value at the control object output. For the first time, to substantiate the fundamental decisionmaking base, the finite series of indicative events was determined with the correlation and spectral analysis method, which are necessary but not sufficient to describe the set of states of the dressing objects of poor ironcontaining ores in the control channel of "useful mineral content in ore-useful mineral content in concentrate". Practical value. The obtained results can be the basis of a promising automatic control system of dressing technol ogy objects for poor ironcontaining ores.

The analysis of the reduce possibilities of the production and energy costs is carried out from the control view of the material size and the testing characteristics of the technological mineral processing process. Correct sampling results show the distribution of valuable components in the ore, and then the concentration process improves the concentrate quality. A method of selecting massif pieces in order to form a representative sample is considered. There are determined the dependence of the change in the distribution function of intergrowths on the material size and the dependence of the sample mass on the texture and structural ore properties, i.e. the content of valuable material and the content of ore grains in the ore. Studies have shown that with a change in the piece size, there is a change in the limiting values of the magnetite content in them. Improving the concentrate quality depends on the size of the processing products, for the control of which a method is proposed for determining the distribution function by size class in accordance with the lognormal law for finely dispersed materials, regardless of their physical properties.