REC «Mekhanobr-Tekhnika» (Russia):

Mezenin A. O., Ph. D. in Engineering Sciences, Chief Specialist, mezenin_ao@npk-mt.spb.ru

Tasina T. I., Senior Researcher, science@mekhanobr.spb.ru
Ierusalimtsev V. A., Head of Department, office@mekhanobr.spb.ru

The Russian Federation possesses vast reserves of high-silica aluminium ores, however, commercially tested competitive technologies needed to produce alumina from these ores are not available yet. High-silica raw materials include nepheline-feldspathic ores, that are practically not utilized commercially for alumina production. On the basis of the analysis of the earlier conducted studies, it was established that for nepheline raw materials processing it is possible to apply the following flow sheets: magnetic-flotation, wet or dry magnetic separation. A method for their comparative assessment was developed on the basis of the approach, used in SWOT-analysis. The assessment of the main technicaland-economic indexes of nepheline ores processing alternatives showed, that tentative economic effectiveness of dry magnetic separation significantly exceeds the wet processes efficiency. Economic effectiveness of wet magnetic and magnetic-flotation processing is characterized by similar values, but taking into consideration a higher grade of concentrates, a combination process may expected to be more efficient. It is expedient to consider magnetic-flotation and dry magnetic separation for further studies with a view to develop effective technological solutions for beneficiation of nepheline raw materials.

This work has been performed under guidance of V. A. Arsentyev, Doctor of Engineering Sciences. The work was performed with the aid from the Ministry of Education and Science of the Russian Federation, the Government Agreement No. 14.579.21.0029. UIPNI RFMEFI57915X0129.

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