Acid leaching of oxide-sulphide copper ore prior the flotation: A way for an increased metal recovery

Sokić, Miroslav; Milošević, Vladan; Stanković, Vesna; Matković, Vladislav; Marković, Branislav

doi:10.2298/hemind140509061s

Cited by 17 publications

(15 citation statements)

References 12 publications

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“…In spite of the L-SX-EW applied on an industrial scale a long time ago, different other approaches in research of reprocessing the flotation tailings, originating from heavy metal sulphide ore processing, have been made during last two decades with the aim of recovering the residual copper as well as associated heavy and precious metals. All the methods are based mainly on chemical-and/or bioleaching and the leach liquor treatment which follows, in rare cases, with re-flotation of the leach residue to concentrate additionally the residual sulphide minerals [8][9][10]12]. Recently, attention has been paid to the electro-kinetic remediation in those cases when sulphide mineral content was small and the content of precious metals was negligible.…”

mentioning

confidence: 99%

Reprocessing of the old flotation tailings deposited on the RTB Bor tailings pond - a case study

Stanković¹,

Milošević

Milićević

et al. 2018

CI&CEQ

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Article Highlights • Mass of the flotation tailings and valuable metal potential was estimated • Purification of the flotation tailings for possible using in construction materials industry • Copper oxide minerals leaching followed by the re-flotation of residual sulphide • Inlet concentration of copper, iron and sulphur was reduced 3 to 5 times • Proposed a new flotation tailings purification process Abstract Flotation waste, which was produced through seventy years of copper ore processing in RTB Bor, Serbia, is deposited in a flotation tailings pond. In total, almost 26.4 Mt could be considered as available for eventual reprocessing and reuse. Chemical analysis has shown that an average concentration of targeted metals in the tailings is: 0.183% Cu, 0.35 g/t Au and 2.17 g/t Ag. The tailings contain 60 to 70% of SiO 2 , 10 to 17% of Al 2 O 3 and pyrite 5 to 8%. Flotation tailings reprocessing consisted of acid leaching followed by re-flotation of the leach residue. Leaching of the tailings resulted in leach liquors containing Cu 2+ ions from 50 to 580 ppm. The average copper removal degree in the leaching stage was 70%. After re-flotation, the total copper removal degree reached 83 to 85%. Sulphur removal degree reached 77%. Sulphur concentration in the treated tailings was reduced almost 5 times compared to the inlet concentration. An equivalent amount of iron was also reduced through the flotation process. Concentration of total copper was reduced 3 times.

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confidence: 99%

Reprocessing of the old flotation tailings deposited on the RTB Bor tailings pond - a case study

Stanković¹,

Milošević

Milićević

et al. 2018

CI&CEQ

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“…Međutim, usled sve strožijih ekoloških standarda i stroge kontrole emisije CO2 i SO2, smanjenja kvaliteta koncentrata, kao i rasta cene energenata, hidrometaluške operacije dobijaju na značaju [8]. Upravo zato, poslednjih godina optimizacija procesa luženja ruda koji sadrže bakar u dvovalentnom stanju predmet su brojnih istraživanja [9,10].…”

Section: Uvodunclassified

Atmospheric leaching of copper from oxide-sulfide ore using sulfuric acid

Ranitović¹,

Kamberovic²,

Korać³

et al. 2020

Tehnika

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Visoka fleksibilnost, ekonomičnost i ekološka prihvatljivost hidrometalurških operacija nude mogućnost za selektivno dobijanje metala u ranim fazama tehnološkog procesa. To omogućava primenu hidrometalurških operacija u preradi ruda koje, zbog kompleksnog sastava ili niskog sadržaja metala, nisu pogodne za pirometalurški tretman. Nasuprot sulfidnim mineralima, za luženje oksidnih ruda nije potrebno prisustvo oksidansa. U ovom radu prikazani su rezultati ispitivanja uticaja temperature na stepen izluženja bakra iz piritno-halkopiritnog koncentrata rastvorom sumporne kiseline pri atmosferskom pritisku. Na osnovu dobijenih rezultata utvrđeno je da povećanje temeprature luženja značajno doprinosi povećanju efiksanosti izluženja pri čemu nakon 6 sati luženja na 40°C postignuta efiskanost je iznosila 90,6%.

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“…The acidic effluent enters the process as the stream 2 at the flowrate of 8700 L h -1 , and is neutralized by addition of 1073.31 kg h -1 of flotation tailings into each of the five reactors ( Streams 1,5,8,11 and 14) and 442.00 kg h -1 into the sixth reactor (Stream 17) to achieve the pH value of 2 in the output solution (Stream 18). Solid and liquid phases are separated in phase separator after each reactor and solid residues exit the process as output Streams 4,7,10,13,16 and 19. After the phase separation, the obtained solutions are transferred to the next reactor.…”

Section: Computer Simulation Of Neutralisation Of the Acidic Efflumentioning

confidence: 99%

“…The average copper leaching degree was approximately 80 %. Sokić et al [7] performed acid leaching of copper from a copper oxide-sulphide ore excavated from the copper mine Cerovo, a part of the RTB Bor. These authors reported the leaching degree of copper of 73.8 % after 3 h in 0.3 M sulphuric acid solution.…”

Section: Introductionmentioning

confidence: 99%

Treatment of the acidic effluent from a copper smelter by flotation tailings

Sokić

Radovanović²,

Marković

et al. 2019

Hem Ind

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Since commissioning in 1961, the copper mine Majdanpek, a part of the Mining and Smelting Complex Bor (RTB Bor), produced approximately 378 million tons of flotation tailings. Semiquantitative mineralogical analysis of the flotation tailings revealed significant content of carbonate minerals (approximately 20-25 %), indicating high acid neutralization capacity. Also, approximately 70 % of copper is in the form of the oxide mineral cuprite (Cu 2 O). Copper can be easily leached from cuprite by using sulphuric acid. The RTB Bor copper smelter generates 8.7 m 3 h-1 of extremely acidic waste effluent (142.4 kgm-3 of sulphuric acid, pH-0.464) with relatively high concentrations of dissolved metals and metalloids (Cu, Fe, Zn, Pb and As). The effluent is currently treated with hydrated lime. The present study focused on application of flotation tailings as a neutralizing agent for acidic effluents. Laboratory experiments followed by computer simulation of the industrial process showed that 99% of the acid can be neutralized with flotation tailings in a series of six reactors resulting in the final copper concentration of 1.55 gL-1. Benefits of the proposed process are: lower environmental impact of the process and reduced costs of neutralization of the acidic effluent from the copper smelter.

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Acid leaching of oxide-sulphide copper ore prior the flotation: A way for an increased metal recovery

Cited by 17 publications

References 12 publications

Reprocessing of the old flotation tailings deposited on the RTB Bor tailings pond - a case study

Reprocessing of the old flotation tailings deposited on the RTB Bor tailings pond - a case study

Atmospheric leaching of copper from oxide-sulfide ore using sulfuric acid

Treatment of the acidic effluent from a copper smelter by flotation tailings

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