SOME PROBLEMS OF ENERGY SAVING WHILE DESTRUCTION OF MINERAL RAW MATERIALS IN SHOCK CENTRIFUGAL CRUSHER

UDC 621.926.2

Authors:

Dyrda V.I., D. Sc. (Tech.), Professor (IGTM NAS of Ukraine),

Loginova A.A., Doctoral Student (NMU SHEI)

Abstract.

This article discusses some of the problems of grinding of mineral raw materials in the shock-centrifugal crushers with a vertical shaft of working body. We consider the hypothesis linking work, supplied to the mill, with the indicator of the results of the grinding process (hypotheses by Kirpichov, Bond, Rehbinder et al.); Rittinger’s hypothesis is prefered, according to which the newly surface, formed by ore grinding, is proportional to the work produced. We present a mathematical model of fracture of mineral raw materials in shock-centrifugal crushers; the model is based on the concept of quasibrittle destruction by G.P. Cherepanov, according to which “…the value of irreversible work expended on the formation of a unit area of the free surface of the body during the development of cracks is a material constant independent of the load, body shape and size”. Coulomb - Navier theory is used with the function of damaged material to calculate the energy intensity of the destruction of mineral raw materials in the compression and shear deformation. It is shown that the most energy-efficient mechanism of destruction of materials in the shock-centrifugal crushers are ways and means, in which shear stresses are implemented mainly.

Keywords:

shock-centrifugal crusher, the theory of Coulomb-Navier, damage function of mineral raw materials, energy-saving mechanisms

References:

1. Sokur, N.I., Poturayev, V.N. and Babets, Ye.K. (2000), Drobleniye i izmel’cheniye rud [Crushing and grinding of ore], VEZHA, Krivoy Rog, Ukraine.

2. Bogdanov, O.S. and Olevskiy, V.A. (ed.) (1982), Spravochnik po obogashcheniyu rud. Podgotovitel’nyye protsessy [Directory on enrichment of ores. The preparatory process], Nedra, Moscow, USSR.

3. Dyrda, V.I., Zozulya, R.P., Levitskiy, A.P. and Khmel’, I.V. (2014), Rezinovyye futerovki tekhnologicheskikh mashin [Rubber linings of technological machines], Dnepropetrovsk, Ukraine.

About the authors:

Dyrda Vitaly Illarionovich, Doctor of Technical Sciences (D. Sc.), Professor, Head of Department of Elastomeric Component Mechanics in Mining Machines, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, Этот адрес электронной почты защищен от спам-ботов. У вас должен быть включен JavaScript для просмотра.

Loginova Anastasyya Aleksandrovna, Doctoral Student, National Mining University State Higher Educational Institution, Dnepropetrovsk, Ukraine, Этот адрес электронной почты защищен от спам-ботов. У вас должен быть включен JavaScript для просмотра.