DOI: 10.5593/SGEM2014/B13/S4.105


E. Alekseeva, V. N. Brichkin, N. Nikolaeva,A. Romashev
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-09-4 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 3, 823-830 pp

Decline in the quality of raw materials mined mining industry is the most common trend which characterizes of condition and changes occurring in the the national and world mineral resource base. Thus it is necessary to speak not only about reducing the content of useful components, but also the complication of the whole chemical and mineralogical composition of the raw material supplied to the enrichment and subsequent processing. Even more difficult with these items are out of balance ores and raw materials of anthropogenic origin, including overburden and industrial wastes of various origins, the recycling of which is becoming increasingly apparent. Significant contribution to improving the quality of raw materials makes the improvement of methods pre-concentration (preliminary) useful components that provides increased efficiency of operations and the subsequent technological processing. From this perspective, special attention should be paid to dry contactless enrichment technologies using electronic signals proportional to the content of minerals in the ore lumps. High separation performance among other methods of classification has modern contactless optoelectronic sorting. Results of a pilot research of separation performance of materials from 45 to 8 mm by the sensor based sorting are presented in article. A color, transparency and degree of a whiteness of minerals were chosen as selectivity indices. High efficiency of optoelectronic sorting for preconcentration of raw materials at a stage of small crushing is shown. It is established that pressure (consumption) of technological air in combination with a size of a raw material is a factor defining efficiency of preliminary concentration of minerals and a basis for optimization of an oper The results obtained suggest high efficiency separation process optoelectronic material for preconcentration stage fine crushing, which reduces power consumption by overgrinding useful components and gangue minerals.ating mode of sensor based separator.

Keywords: sensor based separation, low-grade mineral resources, pre-concentration, indicators.

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