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Ke P, Rinne M, Kalliomäki T, Wang Z, Hannula PM, Wilson BP, Lundström M. Sulfuric Acid Baking and Fe(III)-Cl --H 2SO 4 Leaching Behavior of Ni- and Cu-Containing Sulfide and Silicate Rich Suhanko Concentrate. ACS OMEGA 2024; 9:26121-26132. [PMID: 38911728 PMCID: PMC11191574 DOI: 10.1021/acsomega.4c01560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 05/24/2024] [Accepted: 05/28/2024] [Indexed: 06/25/2024]
Abstract
Ni- and Cu-rich concentrate from a new site in Suhanko, Finland, was investigated. Mineral phases identified included talc, chalcopyrite, kaolinite, and pyrrhotite with 3.2% Cu and 1.5% Ni, and the latter is associated with pyrrhotite. In addition, the concentrate contained the precious elements Pd (14.9 g/t), Ag (17.1 g/t), Pt (2.1 g/t), and Au (1.1 g/t). This concentrate was baked and leached using a Fe(III)-Cl--H2SO4 system. The results showed that the leaching efficiencies of Ni, Cu, and Si from raw concentrate were 60%, 40%, and 5%; however, those from baked concentrate were 96%, 60%, and below 0.1%, indicating that the baking process enhanced Ni and Cu extraction while simultaneously inhibiting the dissolution of Si, which was due to the baking process liberating the associated Ni and Cu by the oxidation of chalcopyrite and pyrrhotite and converting the acid-soluble silicate into an insoluble form. Sulfuric acid leaching solution with Fe(III) as oxidant and Cl- as lixiviant was shown to be effective at leaching Ni (97%), Cu (62%), and Ag (89%), while simultaneously enriching the PMs Pd, Pt, and Au in the residue.
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Affiliation(s)
- Pingchao Ke
- The
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330000, China
- School
of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330000, China
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, P.O. Box 16200, FI-00076 Aalto, Finland
| | - Marja Rinne
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, P.O. Box 16200, FI-00076 Aalto, Finland
| | - Taina Kalliomäki
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, P.O. Box 16200, FI-00076 Aalto, Finland
| | - Zulin Wang
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, P.O. Box 16200, FI-00076 Aalto, Finland
| | - Pyry-Mikko Hannula
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, P.O. Box 16200, FI-00076 Aalto, Finland
| | - Benjamin P. Wilson
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, P.O. Box 16200, FI-00076 Aalto, Finland
| | - Mari Lundström
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, P.O. Box 16200, FI-00076 Aalto, Finland
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Zhao L. Immobilization of Cr(VI)-containing tailings by using slag-cementing materials for cemented paste backfill: influence of sulfate and limestone addition. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:91984-91996. [PMID: 37479941 DOI: 10.1007/s11356-023-28605-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 07/01/2023] [Indexed: 07/23/2023]
Abstract
Heavy metals in mine tailings lead to serious environmental problems. Cemented paste backfill (CPB) is widely used for treating the mine tailing. The high cost of ordinary Portland cement (OPC) reduces the profit of mine production. The work investigates the treatment of Cr(VI)-containing tailings by using slag-based cementitious materials for CPB. Flue gas desulfurization gypsum (FGDG) and limestone were used to modify the properties of samples. Results showed that the coupling addition of 6 wt% FGDG and 3 wt% limestone (A6L3) led to the highest compressive strength of CPB samples, which also presented satisfactory immobilization effects for Cr(VI). The compressive strength of CPB samples using A6L3 as a binder was comparable to the OPC-based sample, reaching about 5.53 MPa; the immobilization efficiency for Cr(VI) was about 99.5%. The effects of FGDG and limestone were twofold: the addition of FGDG favored the formation of ettringite and then contributed to a more compact structure; besides, incorporating limestone increased the packing density of the CPB system by decreasing the loosening and wedge effect.
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Affiliation(s)
- Liding Zhao
- Department of Mining Engineering, Luliang University, Lvliang, 033000, China.
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Zhang H, Kou J, Sun C, Wang P, Lin J, Li J, Jiang Y. Optimization of cemented paste backfill with carbon nanotubes as a sustainable treatment for lead-containing tailings. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.118152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Yue C, Liguo X, Zhiyun Z, Xiangling W. Modification of cemented paste backfill with calcined layered double hydroxides for lead-containing tailings disposal. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.118089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kalebic D, Dehaen W, Spooren J. Additive-Free Aqueous Extraction of Copper and Zinc from Sulfidic Tailings Using Fast Microwave-Assisted Pre- and Post-Treatments. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Demian Kalebic
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Leuven, Belgium
| | - Wim Dehaen
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Leuven, Belgium
| | - Jeroen Spooren
- Waste Recycling Technologies, Flemish Institute for Technological Research, VITO n.v., Boeretang 200, 2400 Mol, Belgium
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Cavusoglu I, Yilmaz E, Yilmaz AO. Sodium silicate effect on setting properties, strength behavior and microstructure of cemented coal fly ash backfill. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.02.013] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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