Obogashchenie Rud

The third issue of the journal opens with publications devoted to beneficiation as a technology and its individual processes. They present a combined processing of tungsten-molybdenum ores based on the differentiation of intra-block reserves using a new concept of lump sorting; the reagent mode of coking coals fine classes flotation is justified to improve the quality of coal concentrate and reduce waste; due to the high reliability of the neural network model, the effectiveness of using multifactor matrices for laboratory tests has been proven.

The article on technological mineralogy provides data on the content of native gold in complex placers of natural and technogenic origin in Russia. The basic technological scheme of the associated extraction of free gold into an independent commercial gold-containing concentrate is also presented.

For the purpose of complex use of raw materials in the publication of the corresponding section, a technology for pyrometallurgical processing of quartz-leucoxene concentrate is proposed. It also makes an assumption about the possibility of using the resulting products (pseudobrukit) as a raw material for the production of titanium compounds by traditional sulfuric acid methods.

The article in the «Equipment» section introduces a new method for determining the intensity of wear of coatings of pipelines and pump parts, head losses and a decrease in energy efficiency. On its basis, an experimental hydrotransportation unit was created for diagnosing the wear resistance of materials of hydrotransport systems. The topic is continued by the material based on the experience of a particular enterprise about the service life of gravel pump impellers during the beneficiation of diamond-bearing sands at the mines of Almazy Anabara JSC (Yakutia).

In «Historical сhronicles» specialists can get acquainted with the history of the production of road crushed stone in the USSR in the pre-war period.

Please find more details below, or order your printed or electronic version of the Journal.

BENEFICIATION TECHNOLOGY
Название	Improvement of the ore mining and processing technology for the Tyrnyauz deposit
Авторы	Khakulov V. A., Kononov O. V., Shapovalov V. A., Karpova Zh. V.
Информация об авторах	Kabardino-Balkarian State University (Nalchik, Russia): Khakulov V. A., Head of Chair, Doctor of Engineering Sciences, Professor, vkh21@yandex.ru Shapovalov V. A., Associate Professor, Doctor of Physical and Mathematical Sciences, Associate Professor Karpova J. V., Master's Degree, Candidate of Engineering Sciences Lomonosov Moscow State University (Moscow, Russia): Kononov O. V., Associate Professor, Candidate of Geological and Mineralogical Sciences, Associate Professor, Academician of the Russian Academy of Natural Sciences
BENEFICIATION PROCESSES
Название	Improvement of the fine coking coal flotation technolgy
Авторы	Alexandrova T. N., Kuskov V. B., Afanasova A. V., Kuznetsov V. V.
Информация об авторах	Saint-Petersburg Mining University (St. Petersburg, Russia): Aleksandrova Т. N., Head of Chair, Doctor of Engineering Sciences, Professor, Aleksandrova_TN@pers.spmi.ru Kuskov V. B., Associate Professor, Candidate of Engineering Sciences, Associate Professor, Kuskov_VB@pers.spmi.ru Afanasova А. V., Teaching Assistant, Candidate of Engineering Sciences, Afanasova_AV@pers.spmi.ru Kuznetsov V. V., Postgraduate Student
Название	Thermochemical processing of bauxites of the North Onega region
Авторы	Dubovikov О. A., Sundurov A. V., Ustinov I. D.
Информация об авторах	St. Petersburg Mining University (St. Petersburg, Russia): Dubovikov O. A., Professor, Doctor of Engineering Sciences, dubovikov_OA@pers.spmi.ru Sundurov A. V., Postgraduate Student, s185092@stud.spmi.ru REC «Mekhanobr-Tekhnika» (St. Petersburg, Russia): Ustinov I. D., Head of the Scientific and Educational Center, Doctor of Chemical Sciences, ustinov_id@mtspb.com
Название	Digital technology for optimizing the sodium sulphide dosage during copper ore flotation
Авторы	Mashevskiy G. N., Ushakov E. K., Yakovleva T. A.
Информация об авторах	MEK-Mining (St. Petersburg, Russia): Mashevskiy G. N., Chief Process Engineer, gennadii.mashevskii@mekgroup.ru St. Petersburg Mining University (St. Petersburg, Russia): Ushakov E. K., Postgraduate Student, s195065@stud.spmi.ru Yakovleva T. A., Postgraduate Student, s205060@stud.spmi.ru
TECHNOLOGICAL MINERALOGY
Название	Typomorphic and processrelated features of associated gold in complex placer deposits
Авторы	Levchenko E. N., Grigoreva A. V.
Информация об авторах	Institute of Mineralogy, Geochemistry and Crystal Chemistry of Rare Elements IMGRE (Moscow, Russia): Levchenko E. N., Deputy General Director, Doctor of Geological and Mineralogical Sciences, lev_imgre@rambler.ru Institute of Ore Deposit Geology, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences (IGEM RAS) (Moscow, Russia): Grigoreva A. V., Senior Researcher, Candidate of Geological and Mineralogical Sciences
COMPLEX RAW MATIREAL UTILIZATION
Название	Principles of pyro-hydrometallurgical processing of quartz-leucoxene concentrate with the formation of a pseudobrukite phase
Авторы	Kuzin E. N., Kruchinina N. E., Fadeev A. B., Nosova T. I.
Информация об авторах	Mendeleev University of Chemical Technology (Moscow, Russia): Kuzin E. N., Associate Professor, Candidate of Engineering Sciences, e.n.kuzin@muctr.ru Kruchinina N. E., Dean, Doctor of Engineering Sciences, Professor, krutch@muctr.ru Fadeev A. B., Postgraduate Student, fadeev89@mail.ru Nosova T. I., Student, nti16041998@gmail.com
EQUIPMENT
Название	Experimental hydrotransportation unit for testing material resistance of pipelines and parts of dredging pumps to hydroabrasive wear
Авторы	Atroshchenko V. A., Avksentiev S. Yu., Makharatkin P. N., Trufanova I. S.
Информация об авторах	Saint Petersburg Mining University (Saint Petersburg, Russia): Atroshchenko V. A., Postgraduate Student, vik3137@yandex.ru Avksentiev S. Yu., Associate Professor, Candidate of Engineering Sciences, avksentiev@mail.ru Makharatkin P. N., Associate Professor, Candidate of Engineering Sciences, pavelnik@mail.ru Trufanova I. S., Associate Professor, Candidate of Engineering Sciences, trufanova_inna@mail.ru
EXPERIENCE OF THE ENTERPRISES
Название	On the streamlined service life of impellers of gravel pumps in the beneficiation of diamondiferous sands
Автор	Ovchinnikov N. P.
Информация об авторе	Mining Institute of North-Eastern Federal University (Yakutsk, Russia): Ovchinnikov N. P., Director, Candidate of Engineering Sciences, Associate Professor, ovchinnlar1986@mail.ru
HISTORICAL CHRONICLES
Название	Development of technology and equipment for the manufacture of road stone in the USSR (pre-war period)
Авторы	Kamenev E. V., Kameneva E. E.
Информация об авторах	Petrozavodsk State University (Petrozavodsk, Russia): Kamenev E. V., Associate Professor, Candidate of Historical Sciences, ev.kamenev@yandex.ru Kameneva E. E., Head of Laboratory, Candidate of Engineering Sciences, Associate Professor, elena.kameneva@mail.ru

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