Author 1:
Name & Surname: Khramov A. N.
Company: Transbaikal State University (Chita, Russia)
Work Position: Assistant Professor
Scientific Degree: Candidate of Engineering Sciences
Contacts: phone: +7(302-2)35-32-02

Author 2:
Name & Surname: Subbotin M. Yu.
Company: Transbaikal State University (Chita, Russia)
Work Position: Engineer

Author 3:
Name & Surname: Khamianov V. P.
Company: Malyshevsk Mine Group (Asbest, Russia)
Work Position: Technical Director
Contacts: e-mail: dubkova@oaomru.ru

Author 4:
Name & Surname: Kutlin B. A.
Company: RIVS-Proekt LLC (Saint-Petersburg, Russia)
Work Position: General Director
Scientific Degree: Doctor of Engineering Sciences
Contacts: e-mail: rivs@rivs.ru

Thermal drying of floatation concentrates is obligatory and very power-intensive operation in the technological scheme of enrichment of ores. Decrease in energy consumption and increase of efficiency of drying in drum dryers is possible by studying and the accounting of physicomechanical properties of a concrete floatation concentrate in the time of optimization of convective heat exchange between the thermal agent and a dried-up material due to improvement of internal devices of the dryer (nozzle). Purpose of a nozzle consists in disclosure of a surface of particles for heat exchange by material hashing, and its distribution on drum section.The management of JSC MRU had practical interest to the conclusions presented in the report, in particular modernizations of the drum dryer. The intensification of convective heat exchange in the course of drying of concentrates is reached by selection of a certain design of internal devices of drum dryers according to change of a corner of a natural slope of a floatation concentrate in process of its movement on a drum for the purpose of creation of more dense and uniform veil on a way of movement of the drying agent. The approved profile bladed nozzle of the drum dryer with two shovels on each blade is result of researches of authors of article. Introduction of this design allows to increase significantly productivity of the dryer and to cut fuel consumption. Realization of actions for modernization of drum dryers at concentrating factories, and also their production at manufacturers became today possible since there is a technical base, there is an algorithm and experience of carrying out researches. We wait for offers for cooperation from potential partners and clients.

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