Metals recovery from multimetal sulphide concentrates (CuFeS2–PbS–ZnS): combination of thermal process and pressure leaching

Akçıl, Ata; Çiftçi, Hasan

doi:10.1016/s0301-7516(03)00061-9

Cited by 43 publications

(18 citation statements)

References 14 publications

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“…To control the level of inorganic parameter contaminations in Obuasi area, the mine introduced hydrometallurgical (bio-oxidation) pre-treatment (Marsden and House 2006) of sulphide ores in 1992 and eventually phased out the pyrometallurgical pre-treatment of ores (Akcil and Ciftci 2003) in 2000. The hydrometallurgical process involves the use of natural bacteria such as thio-and ferrooxidan Thiobacilli to release the undesired constituent elements which are often discharged as harmless precipitates.…”

mentioning

confidence: 99%

Concentration levels of some inorganic contaminants in streams and sediments in areas of pyrometallurgical and hydrometallurgical activities at the Obuasi gold mine, Ghana

Foli

Nude

2011

Environ Earth Sci

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This study assessed the levels of selected inorganic contaminants in streams and stream sediments in the effluent areas relating to the pyrometallurgical and hydrometallurgical treatment of gold ores in the Obuasi gold mine, Ghana. Water and stream sediment samples were taken from specific locations during the consecutive rainy and dry seasons, and concentrations of phosphate (PO 4 3-), nitrate (NO 3 -), chloride (Cl -), sulphate (SO 4 2-), sodium (Na ? ), potassium (K ? ), calcium (Ca 2? ), magnesium (Mg 2? ), arsenic (As), copper (Cu), iron (Fe), zinc (Zn) and lead (Pb), were determined. Alkalinity, pH, temperature and specific electrical conductivity were also measured. In the water samples, the average pH range for both the seasons is 6.9-7.4, most anions and metals have relatively higher concentrations in the wet season than in the dry season at both the metallurgical sites. Trace metals concentrations were comparatively low (\0.01-5.00 mg/l), higher in the dry season at the pyrometallurgical sites. Irrespective of seasons, SO 4 2-(0.80-949.50 mg/l) and PO 4 3-(\0.01-6.30 mg/l) were pronounced at the pyrometallurgical sites, while NO 3 -(0.01-98.45 mg/l) and Cl -(1.88-49.05 mg/l) were higher at the hydrometallurgical sites. In water samples, Ca 2? and SO 4 2? were the dominant cation and anion, respectively. In the stream sediments, except pH, NO 3 -, Cl -, Na ? and Mg 2? , all other parameter values were relatively higher at the hydrometallurgical areas. The average concentrations of Ca 2? , Mg 2? , As and Fe are remarkably high at both metallurgical sites (3,217-46,026 mg/kg). Overall, the level of parameters in the water samples are pronounced at pyrometallurgical sites, whereas the levels in sediments are higher at the hydrometallurgical sites.

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confidence: 99%

Concentration levels of some inorganic contaminants in streams and sediments in areas of pyrometallurgical and hydrometallurgical activities at the Obuasi gold mine, Ghana

Foli

Nude

2011

Environ Earth Sci

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“…Ferric and cupric ions, bacteria, oxygen, and other oxidants have been used as leaching agents of sulphide in sulphate and chloride media under atmospheric or pressure leaching conditions [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Complex sulphide-barite ore leaching in ferric chloride solution

Sokić¹,

Matković²,

Marković³

et al. 2016

Metall Mater Eng

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The results of research on the leaching process of complex sulphide-barite ore were presented in this paper. The leaching process was carried out in a laboratory autoclave by ferric chloride solution. Considering that those minerals are represented in complex structural-textural relationships, it is not possible to extract lead, zinc and copper minerals from ore by flotation methods. The obtained results confirmed possibility of the ore processing directly, by chemical methods. The effect of temperature, time and oxygen partial pressure on the lead, zinc and copper dissolution was studied. The maximal leaching degree was achieved at 100 C and amount of 91.5 % for Pb, 96.1 % for Zn and 60.7 % for Cu). Leaching at temperatures above 100 C is impractical.

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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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Metals recovery from multimetal sulphide concentrates (CuFeS2–PbS–ZnS): combination of thermal process and pressure leaching

Cited by 43 publications

References 14 publications

Concentration levels of some inorganic contaminants in streams and sediments in areas of pyrometallurgical and hydrometallurgical activities at the Obuasi gold mine, Ghana

Concentration levels of some inorganic contaminants in streams and sediments in areas of pyrometallurgical and hydrometallurgical activities at the Obuasi gold mine, Ghana

Complex sulphide-barite ore leaching in ferric chloride solution

Kinetics of barite reduction from refractory barite-sulphide ore

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