165 Inżynieria Mineralna — LIPIEC-GRUDZIEŃ <2014> JULY-DECEMBER — Journal of the Polish Mineral Engineering Society Extraction of Non-Ferrous Metals from Waste Deposits (on Example of Industrial Sites in the Murmansk Region) Anton SVETLOV 1) , Eugenia KRASAVTSEVA 2) , Sergey SELEZNEV 3) , Dmitry MAKAROV 4) , Vladimir MASLOBOEV 5) 1) Institute of the Industrial Ecology Problems of the North KSC RAS, Akademgorodok 14A, Apatity, 184209, Russia; email: svetlov@inep.ksc.ru 2) Institute of the Industrial Ecology Problems of the North KSC RAS, Akademgorodok 14A, Apatity, 184209, Russia; 3) “Monolit” Mining company LLC, Gvardeyskiy ave.,6/1-8, Nikel, Russia; email: seleznev.s.ek.@mail.ru 4) Dr.; Institute of Industrial North Ecology Problems of the Kola Science Centre of RAS, Fersman St., 14a, Apatity, Murmansk Region, 184209, Russia; email: makarov@inep.ksc.ru 5) D. Sc.; Institute of the Industrial Ecology Problems of the North KSC RAS, Akademgorodok 14A, Apatity, 184209, Russia; email: masloboev@ksc.ru Keywords: non-ferrous metals, technogenic deposits, sulphates, loatation, magnetic separation Introduction Sulide-containing wastes are the most environmental- ly hazardous wastes. Wastes occupy vast lands, violate the existing hydrologic and geo-hydrologic regime and induce secondary dust pollution of the air basin and natural water bodies, also they contain loatation reagents and minerals able to transform into soluble toxic compounds and thus produce adverse effect on the environment. The storage of wastes is accompanied by oxidation of sulide minerals and formation of sulfuric acid (Acid mine drainage) and iron and non-ferrous metal sulphates. Hypergenic changes of technogenic products are more rapid compared to a natural geological medium [1]. As a rule, the conventional processing methods are ineffective for processing of such mineral resources due to peculiar forms of occurrence of valuable minerals, their high degree of dispersivity and changes of physical and physico-chemical surface properties. That’s why the development of new high-tech and environmentally safe processes decreasing the environmental impact of the sul- ide-containing wastes and providing effective and com- plex extraction of valuable components from ores and the processing wastes is an urgent geo-ecological and econom- ic objective [2]. Area description/Materials and methods A pilot study of loatation-based reextraction of non-ferrous metals from current tailings of the “Pechen- ganikel” smelter, “Kolskaya GMK” JSC, was carried out in collaboration with Institute of Comprehensive Exploitation of Mineral Resources Russian Academy of Sciences (A.A. Lavrinenko, Dr. Sc. (Engineering), Sarkisova L.M., PhD (Engineering), Glukhova N.N., postgraduate student). The distribution of metal concentrations in fractions is given in Table 1. The potassium butyl xanthate (PBX) was used as a collector and methyl-isobutyl carbinol (MIC) - as a foaming agent. Blue copper was added to activate pyrrho- tite. Two lowsheets were tested: 1. Crushing of tailings in a grinding mill up to 90% of the grade -71µm followed by loatation; 2. Desludging of tailings using a water cyclone ac- cording to the grade 20 µm, further grinding of sands from the cyclone up to 90% -71µm followed by loatation. The irst lowsheet included one loatation process and reagent consumption was as follows: blue copper – 30 g/ ton; PBX – 160 g/ton and MIC – 70 g/ton. The second lowsheet included three loatation pro- cesses and the reagent consumption was as follows: Floatation no.1: blue copper – 30 g/ton; PBX – 100 g/ton and MIC – 50 g/ton. Check loatation no 1: PBX – 50 g/ton and MIC – 20 g/ton. Check loatation no 2: PBX – 50 g/ton and MIC – 20 g/ton. Another research target was a technogenic depos- it “Waste dumps of the Allarechensk deposit”, located in the Pechenga district of the Murmansk region. The deposit represents rock refuses formed during ore extraction in the primary deposit of sulide copper-nickel ores, where open- cast mining was stopped in 1971. The rocks of the dumping site represent overburden chiely valueless gneisses, gran- ite-gneisses, amphibolites and enclosing rocks mineralized to different extents: peridotites, olivinites, contact amphi- Summary Diicult sulide ores of non-ferrous metals and some nonconventional raw materials, particularly those of technogenic origin, are increas- ingly being involved in processing nowadays. Processing of the raw materials from technogenic deposits is the most efective way for operat- ing mining companies to enlarge the available mineral resources, to improve the resources utilization eiciency, to reduce resource-intensity of products and to remediate the surrounding environment. he results of loatation of copper-nickel dressing tailings have been studied. A technology of dry magnetic separation of the dumps the Allarechensk copper-nickel deposit is suggested. A method for geotechnological treatment of substandard Ni, Cu and Co containing sulide material is developed.