REC «Mekhanobr-Tekhnika» (Russia):

Gerasimov A. M., Resercher, gerasimov_am@npk-mt.spb.ru
Dmitriev S. V., Chief Specialist, dmitriev_sv@npk_mt.spb.ru

Presently, main industrial technologies, used for mineral coal beneficiation, are based on «wet» processes. Use of these technologies leads to a number of negative economic and environmental implications. The purpose of this work is development of dry methods for coal beneficiation. Development of dry coal beneficiation technology is of high priority for facilities, located in Siberia and northern latitudes, where operation is subject to low temperatures, as well as those situated in regions with arid climate, where water-supply sources are not available. In these conditions, change from conventional methods of coal beneficiation will permit not only to decrease process costs, but also considerably decrease process duration and capital construction сosts, as well as decrease environmental impact. The developed mineral coal beneficiation flow sheet is based on coal thermochemical modification. It is shown, that thermal treatment of coal, similar to semicoking regime, provides for physical and chemical transformations of coal mass, producing significant effect upon possibilities of its further processing and conversion. Thermal treatment of coal specimen affects pore structure, semicoke porosity ratio is increased by the factor of 7. Semicoking of coal decreases energy costs for its crushing and significantly increases magnetic properties of its mineral constituent, providing for its more effective recovery by magnetic separation methods.
This work has been performed under guidance of V. A. Arsentyev, Doctor of Engineering Sciences.
The study were performed with the aid of the Russian Science Foundation Grant (Project No. 15-17-30015).

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