Complex sulphide-barite ore leaching in ferric chloride solution

Sokić, Miroslav; Matković, Vladislav; Marković, Branislav; Manojlović, Vaso; Štrbac, Nada; Živković, Dragana; Kamberović, Željko

doi:10.30544/216

Cited by 4 publications

(3 citation statements)

References 19 publications

(33 reference statements)

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“…Recently, an increased interest is remarked related to the possible application of various reagents in a hydrometallurgical processing of sulphide concentrates. Ferric [5][6][7][8][9][10][11] and cupric [12,13] ions, bacteria [14][15][16][17], and other oxidants [3,4,[18][19][20][21][22][23][24][25][26] were used as oxidative leaching agents of complex sulphides in su-lphate and chloride media under atmospheric or extended pressure leaching conditions. Some of the hydrometallurgical processes developed for copper ores and concentrates treatment can also be considered for a treatment of complex sulphides.…”

Section: Introductionmentioning

confidence: 99%

Leaching of polymetallic Cu-Zn-Pb concentrate with sodium nitrate in sulphuric acid

Sokić¹,

Marković²,

Milojkov³

et al. 2021

Tehnika

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The results of polymetallic sulphide Cu-Zn-Pb concentrate leaching with sulphuric acid in the presence of sodium nitrate as an oxidizing agent, at atmospheric pressure, are presented and discussed. Chemical composition and phase ratio of the starting concentrate and solid residuals after the leaching process are shown. Chemical reactions of leaching and their thermodynamic probabilities are predicted based on the calculated Gibbs energies and analysis of E-pH diagrams. The influence of temperature and time on the leaching degree of the concentrate's components is experimentally determined. It is shown that it is possible to obtain copper, zinc and iron in a solute form, while lead in the anglesite (PbSO4) form remains in the solid residual after the leaching process. The iron is being oxidized to Fe(III)-sulphate, which takes part in a sulphide leached minerals and turns into Fe(II)-sulphate.

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Section: Introductionmentioning

confidence: 99%

Leaching of polymetallic Cu-Zn-Pb concentrate with sodium nitrate in sulphuric acid

Sokić¹,

Marković²,

Milojkov³

et al. 2021

Tehnika

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“…Leaching of the sulphide minerals as the ingredients of the polymetallic ores has been the subject of many investigations [4][5][6][7][8][9][10][11][12][13]. This paper presents the investigation of refractory sulphide-barite ore "Bobija" reduction by carbon to liberate lead, zinc, and copper sulphide from barite-pyrite base.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of barite reduction from refractory barite-sulphide ore

et al. 2016

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Refractory sulphide-barite ore was reduced with carbon in order to release lead, zinc, and copper sulphide from barite-pyrite base. Mineralogical investigations showed that due to the complex structural-textural relationships of lead, copper and zinc minerals with gangue minerals, it is not possible to enrich the ore using the conventional methods of mineral processing. The influence of temperature and time was studied to optimize the conditions, and to determine the kinetics of the barite reduction. The maximum removal of barite from ore was 96.7% at 900 o C after 180 min. Chemically controlled kinetic model showed the best compliance with the experimental data. An activation energy of 142 kJ/mol was found.

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“…Sulfidni minerali imaju stabilnu kristalnu rešetku, pa prilikom njihovog luženja rastvor mora sadržati oksidaciono sredstvo za oksidaciju sulfidnog sumpora. Feri, kupri, nitratni i nitritni joni, kiseonik, bakterije i drugi oksidansi koriste se kao sredstva za luženje sulfidnih minerala u sulfatnim i hloridnim rastvorima pri standardnom i povišenom pritisku [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

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Effects of structural and textural grain characteristics on leaching of sulphide minerals from a polymetallic concentrate by sodium nitrate and sulphuric acid solution

Sokić

Stojanovic

Marković

et al. 2017

Hem Ind

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In this paper, the influence of structural and textural characteristics of sulfide minerals on their leaching from a polymetallic concentrate by sulfuric acid and sodium nitrate solution is presented. The starting material was Pb?Zn?Cu sulphide polymetallic concentrate enriched during the flotation of a polymetallic ore in the "Rudnik" flotation plant (Rudnik ? Serbia). Leaching experiments were carried out in a closed glass reactor, which provides stable hermetic conditions and allows heating at constant temperature. Chemical, XRD, qualitative and quantitative microscopic and SEM/EDX analyses were used to characterizes samples of the polymetallic concentrate and leach residue. It was determined that chalcopyrite, sphalerite, galena, pyrrhotite and quartz were present in the polymetallic concentrate. The content of sulphide minerals was 69.5%, of which 60.9% occurred as liberated grains: 88.3% of chalcopyrite, 59.3% of sphalerite, 25.1% of galena and 51.6% of pirrhotite. The rest of chalcopyrite, sphalerite, galena and pirrhotite grains were in the forms of inclusions, impregnations, and simple and complex intergrowths. During the leaching process by sodium nitrate and sulphuric acid solution, it was shown previously that the leaching rate of sulphide minerals decreased with time while a part of the sulphide minerals remained in the leach residue. After leaching at 80?C for 120 min, the yields were 69.8, 82.7 and 67.1% for Cu, Zn and Fe, respectively. Lead, in the form of insoluble anglesite, remained in the leach residue. In addition to the anglesite, unleached sulfide minerals and quartz, elemental sulfur was found in the solid residue. The content of sulphide minerals was 35% of which 33.7% minerals occur independently. In specific, 54.7% of chalcopyrite, 31.9% of sphalerite, 8.2% of galena and 37.6% of pyrrhotite appear as separate grains with highly corroded surfaces. Therefore, the structural assembly of sulphide grains in the polymetallic concentrate is favourable and it is not the reason for the observed decrease in the leaching rate in the final process stages. The obtained findings may be explained by the presence of elemental sulphur that is formed during the reaction and precipitated at the grain surfaces, thus creating a diffusion barrier for the leach solution. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. TR34023]

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Complex sulphide-barite ore leaching in ferric chloride solution

Cited by 4 publications

References 19 publications

Leaching of polymetallic Cu-Zn-Pb concentrate with sodium nitrate in sulphuric acid

Leaching of polymetallic Cu-Zn-Pb concentrate with sodium nitrate in sulphuric acid

Kinetics of barite reduction from refractory barite-sulphide ore

Effects of structural and textural grain characteristics on leaching of sulphide minerals from a polymetallic concentrate by sodium nitrate and sulphuric acid solution

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