“Severalmaz“ JSC (Arkhangelsk, Russia):

Yamov A. V., Deputy Head of Industrial-Technical Administration, e-mail: ayamov@severalmaz.ru

„Polymetal Engineering“ JSC (Saint Petersburg, Russia):

Kuznetsov I. A., Chief Project Engineer, Candidate of Engineering Sciences
Babuk A. V., Head of Laboratory of Technical Calculations and Modeling

Lomonosov diamond deposit (Primorskiy Kray (Arkhangelsk Oblast)) includes six pipes, situated at the Western area of Zolotitskoe kimberlite field. “Severalmaz” JSC has been carrying out the development of this deposit since 2005. Since 2010, Lomonosov Ore Dressing and Processing Enterprise has increased the dry ore production of enterprise to 4 mln. t per year. Nowadays, there is finished the construction of the II stage of concentration plant with ore preparation technology, similar to the I operating stage. Process of ore preparation on the I stage of concentration plant is connected with certain problems. One of the basic problems consists in the fact that ore delivery for crushing stage is realized by dump trucks directly on fire grate of receiving bin (crack size is 400 mm). At the same time, in connection with large amount of coarse material and its high clayiness, process of preliminary screening is characterized by low production capacity. This problem is described as more significant on the II constructed stage of concentrating plant, which is substantiated by significantly large production capacity by processing of ore and impossibility of application of loading machine, which transporting to the 600 600 mm grid is impossible. There is realized the analysis of capital and exploitation costs on realization of project of reconstruction of concentration plant with introduction of technology of coarse grinding with the purpose of increasing of economic efficiency of project of development of Lomonosov diamond deposit. The proposed technology of coarse crushing of ore made it possible to do the following operations:
-increasing of production capacity on initial ore of the whole concentration plant;
-increasing of coefficient of use of technological equipment;
-creation of conditions for growth of economic efficiency of enterprise’s operation in whole.