Development of a model system for controlling the jet grinding plant operation
Journal Title: Технічна механіка, Техническая механика, Technical Mechanics - Year 2018, Vol 2, Issue 2
Abstract
Because of the increasing demand for fine-dispersed products in many industries, on the hand, and the high energy intensity of the grinding process, on the other hand, the problem of fine grinder productivity improvement and power consumption reduction is quite topical. The aim of this paper is to develop a system for monitoring and controlling the productivity of a jet grinding plant based on the results of acoustic monitoring of its working areas. The new approach consists in continuously monitoring the material grain-size composition and forming control actions on the circulating load of the grinding plant based on the analysis of the acoustic signals analysis from the grinding chamber. The main factors that affect the efficiency of closed-loop jet grinding were studied, and a three-level model of the grinding process was constructed. The model accounts for the features of grinding loop, the kinetics of the material grain-size composition in the grinding chamber, and the relation between the grinding process and the acoustic signal characteristics. It was shown that increasing the yield of a finished product of a given size calls for monitoring the acoustic signals of the grinding zone and controlling the grinding chamber loading in accordance with them in order to maintain it at the optimum level. This study may be a basis for the development of an auto-mated control system for a jet grinding plant. Installing such a system in the finished transportation zone down-stream of a granulometer-type classifier would allow one to introduce an additional correction making the quality monitoring nearly continuous. From the characteristics of the recorded acoustic signals, the system automatically detects the presence of particles larger than the reference in the two-phase flow and points to the need for adjust-ing the classification regime. The elimination of the re-grinding probability improves the product quality and reduces the power consumption. These studies will be a basis for refining the model of an automated control system for a jet grinding plant and for its further development.
Authors and Affiliations
N. Pryadko, G. Strelnykov, L. Muzyka
Keywords
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