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ASSESSMENT OF EFFICIENCY IMPROVEMENT POTENTIALITY IN ORE PRETREATMENT AT KOVDOR MINING AND PROCESSING PLANT



Industrial audit of ore pretreatment system at Kovdor Mining and Processing Pant is accomplished in terms of condition and availability of repair facilities (sites) at a mill. Organizational and process measures are proposed to improve efficiency of all kinds of repair (maintenance, running and basic repair). The materialized potentialities and limitations of the repair site at the medium and fine crushing building are discussed, as well as the state of the site after implementation of proper managerial decisions is described. Efficiency of calendar time usage in operation and repair of crushing equipment is analyzed. The expert estimation of the calendar time loss by specialists and managers of the mine is made, and the components of the track of time are grouped with respect to basic production lines. The calendar time loss is illustrated in terms of operation of crushers KMD-2200. Based on these calculations, the condition of the maintenance and repair system for the crushing and screening equipment is evaluated. The recommended indicators for the evaluation of the repair system efficiency include: production time of equipment, specific duration of repair, unit man-hours and incremental cost of repair. The technical approach to determining method of breakage of a separate mineral particle based on the principle of agreement between mineral properties and their transformation system, i.e. crushing, is described. The three-stage scheme of crushing: coarse, medium and fine, is presented. The productivity of fine crushers KMDR-2200 is calculated. It is shown that the difference between the calculated and actual productivities of crushers is governed by the quality of process management, skills of personnel and properties of minerals to be treated.

: 1
2019
ISBN: 0236-1493
УДК: 622.732
DOI: 10.25018/0236-1493-2019-01-0-185-192
Authors: Andreeva L. I.

Authors' Information:
Andreeva L.I., Doctor of Technical Sciences, Chief Researcher,
Chelyabinsk Branch of Institute of Mining of Ural Branch, Russian Academy of Sciences,
454048, Chelyabinsk, Russia, e-mail: tehnorem74@list.ru.

Key words:
Сrushing and screening equipment, resources, repair quality, ore pretreatment process, repair facilities, repair size, mechanical availability, work process, productivity, rock strength.

References:

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