METHOD three-stage technological optimization parameters CENTRIFUGAL enriched for extraction of precious metals in mineral form from ores, tailings during processing of disseminated copper-nickel ores of Norilsk FIELDS

摘要

FIELD: mining.;SUBSTANCE: invention relates to the mining industry and can be used to increase the extraction of valuable elements from ores and products of their processing, in particular for the recovery of precious metals in mineral form and in part of sulphides of copper, nickel, iron from old tailings of the preserved tailing dump located in the Norilsk industrial district. The method of three-stage process optimisation of the parameters of the centrifugal enrichment for the recovery of precious metals in the mineral form from ores, tailings during processing of embedded copper-nickel ores of Norilsk deposits comprises selection of its own minerals of platinum group metals in the gravity concentrate before the flotation enrichment operation at a weight ratio of the amount of sulphides and magnetite and the amount of oxides of silicon and aluminium in the initial ore or tailings less than 1:2, the size of 30-65% class less than 74 microns. Isolation of own minerals of platinum metals is carried out at the value of the centrifugal Froude number of 11.75 and ratio of this value to the fluidising water pressure of 0.085 kPa. The method of optimising the parameters of centrifugal enrichment comprises the sequence of operations on the centrifugal separators, designed for continuous operation in industrial environments. At the first step an optimum accumulation time of the concentrate is determined. At the second step the optimum speed of jets of water or optimal water flow through the openings to the separator bowl inter-ripple space is selected. At the third stage the speed of jets of water or water flow through the openings to the separator bowl inter-ripple space is stepwise increased, starting with the optimal water flow, defined in the second step and the optimum time interval of accumulation of concentrate defined in the first step.;EFFECT: improving the efficiency of the recovery of precious metals from ores, tailings from the processing of ores of Norilsk deposits, as well as improving the efficiency of the optimisation parameters of centrifugal enrichment.;3 cl, 2 dwg, 4 tbl