Control regularities of the useful mineral extraction from ore feed stream with ball grinding. Spectral analysis

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Authors:

I.K. Mladetskyi, Doctor of Technical Sciences, Professor, National Mining University, Professor of the Mineral Processing Department, Dnipro, Ukraine

Ya.H. Kuvaiev, Candidate of Technical Science, Associate Professor, National Mining University, Leading Researcher of Research Department, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

N.S. Priadko, Doctor of Technical Sciences, Senior Research Fellow, National Academy of Sciences of Ukraine and State Space Agency of Ukraine, Institute of Technical Mechanics, Senior Research Fellow of the Thermogasdynamic Power Plants Laboratory, Dnipro, Ukraine

Abstract:

Purpose. Using spectral and frequency analysis methods, to determine the indicative events characterizing a
process condition on a control channel “content of useful mineral in ore – content of useful mineral in a concentrate” of ore concentrating plant with ball grinding to exclude the operator from control contour.

Methodology. Spectral and frequency analysis of control object.

Findings. The analysis of the logarithmic amplitude-frequency characteristic of an enrichment section showed that the control strategy of a section and an ore concentrating plant in general through the “content of useful mineral in ore – content of useful mineral in a concentrate” channel should be based on reaction to a parameter value deviation of saleable concentrate from the set values. The spectral analysis of useful mineral content in ore and saleable concentrate and the frequency characteristics obtained on the basis of commercial operation data allowed allocating some indicative events which characterize an enrichment process condition through the specified control channel.

Originality. It has been shown for the first time that automatic control systems for the enrichment section and concentrating factory in general through the channel described above should be constructed according to the reaction to the deviation of saleable concentrate characteristics from the set ones. The analysis of dispersion spectrum parameters of general iron content in initial ore and a concentrate and amplitude-frequency characteristics through the control channel obtained during commercial operation at an ore concentrating factory has been carried out for the first time.

Practical value. The obtained results can be used for creation of automatic system of situational management of an ore dressing process of ferrous and non-ferrous metals both at separate sections with ball crushing and at factories consisting of these sections.

References

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ISSN (print) 2071-2227,
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Journal was registered by Ministry of Justice of Ukraine.
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