Open AccessImproving the technology of mature tailings processing at the Kovdorsky GOK
Author(s) -
Barmin Igor,
Mcc EuroChem,
Morozov Valerii,
Polivanskaia Valeriia
Publication year - 2020
Publication title -
izvestiâ vysših učebnyh zavedenij. gornyj žurnal
Language(s) - English
Resource type - Journals
eISSN - 2686-9853
pISSN - 0536-1028
DOI - 10.21440/0536-1028-2020-5-56-65
Subject(s) - tailings , reagent , phosphogypsum , mineral processing , dispersant , raw material , flocculation , apatite , environmental science , pulp and paper industry , phosphate , arithmetic underflow , waste management , chemistry , mineralogy , materials science , environmental engineering , metallurgy , engineering , computer science , physics , organic chemistry , optics , dispersion (optics) , programming language
. Phosphate minerals are lost during flotation of mature tailings of the Kovdorsky GOK due to difficult mineral fractions and poor conditions for effective flotation of thin classes of phosphate minerals. Research aims to increase the efficiency of raw material processing at the technogenic deposit of the Kovdorsky GOK by optimizing the reagent regime and the scheme of dressing thin classes of mature tailings with the use of modern reagents-flocculants, selective depressors and collectors. Methodology. The developed regime of sludge preparation for flotation involves their thickening using the Praestol-2540 flocculant, condensed sludge product processing with a mixture of dispersant reagents (SSB, sodium carbonate and Neonol AF 9-8), its additional thickening, followed by combining the resulting ISSN 0536-1028 «Известия вузов. Горный журнал», № 5, 2020 65 sediment with the sand part of the tailings, their conditioning with the collector and feeding to the combined flotation with the use of the integrated collector according to the scheme with the middlings cycle. Results. The scheme and reactant regime of enrichment tailings of complex parts of technological fields has allowed to achieve recovery of P2O5 45% (from power source) and the mass fraction of P2O5 in Apatite of 37.1%, or 0.5 and 1.5% higher than when using the design scheme and technology. Summary. The developed technology of mature tailings processing at the Kovdorsky GOK ensures increased indicators of processing by means of creating the conditions for efficient flotation of fine classes of phosphate minerals.