JSC “Soyuztsvetmetavtomatika”, Moscow, Russia:

V. P. Topchaev, Chief Executive Officer
A. V. Topchaev, Head of Laboratory
M. V. Lapidus, Leading Engineer, e-mail: 42@scma.ru

The paper is a brief analysis of the known controlling methods ground product’s grain fineness to justify the possibility of their use for the automatic controlgraded directly in the flow of particulate material without sampling. The main requirements to the choice of control method of a product size after grinding and separating units are presented, the principle of the Rosen-Ramlera equation is proposed as a method of automatic control-graded, the results of practical verification of the measurement method are provided, proving a high degree of dependence of a given class size content in the flow of the pulp from the average size to medium-large particles in the flow. Implementation of the particulate size measuring method in stock flow is made in the form of a micrometer probe comprising a movable measuring rod and a stationary thrust bearing, placed directly into the flow (pulp), which measures with a predetermined frequency the size of passing through the probe random medium-coarse particles of pulp, with the transformation of measurements into electrical signal followed by a signal controller for a given algorithm, with the issuance on a scoreboard continuous values of the content of a given class product size, and the signal into grinding control system. Issues of improving the accuracy of measurements particle size distribution with the density and temperature of the flow of ground products are handled by the authors. The data to ensure high reliability of the measurement system, the features of the application of the granulometer PIK 074P in various industries for the automatic control and management-graded process of crushing and separation, as well as data on implementation granulometers PIC 074 series at the concentrators and metallurgical plants is given.

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14. Topchaev V. P., Zinina L. K., Topchaev A. V., Lapidus M. V. Ustanovka avtomaticheskogo kontrolya granulometricheskogo sostava v potoke pulpy tipa “PIK-074” (Apparatus for industrial control of granulometric composition in the pulp flow “PIK-074”). Praktika priborostroeniya = Instrumentation technology practice. 2003. No. 3.
15. V. P. Topchaev, A. V. Topchaev, M. V. Lapidus. Sposob avtomaticheskogo kontrolya krupnosti chastits v potoke materiala (Method of automatic control of particle coarseness in material flow). Patent RF, No. 2401425. Published : October 10, 2010. Bulletin No. 28.