Extraction of metal values from iron-rich mine tailings via chloridized roasting and water leaching
The surge in mining and mineral processing to meet metal demand has led to accumulation of mining by-products like tailings, waste rocks, and acid mine drainage, containing high iron, copper, nickel, and zinc concentrations. These residues pose environmental threats. The concept of technospheric min...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-06-01
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| Series: | Waste Management Bulletin |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949750724000300 |
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| author | Swati Pramanik Aarti Kumari S.K. Sahu Basudeb Munshi |
| author_facet | Swati Pramanik Aarti Kumari S.K. Sahu Basudeb Munshi |
| author_sort | Swati Pramanik |
| collection | DOAJ |
| description | The surge in mining and mineral processing to meet metal demand has led to accumulation of mining by-products like tailings, waste rocks, and acid mine drainage, containing high iron, copper, nickel, and zinc concentrations. These residues pose environmental threats. The concept of technospheric mining aims to repurpose these wastes for beneficial uses, reducing disposal and ecological impact while benefiting stakeholders. Within this context, the present investigation focuses on the discriminative retrieval of copper and nickel from mine tailings characterized by elevated iron content. This is achieved through formulation of an energy-efficient technique designed to surmount the challenge of iron co-extraction during hydrometallurgical processes aimed at extracting and recuperating metal values from intricate phases. The proposed method entails the amalgamation of mine tailings and solid NH4Cl in a stoichiometric ratio of 1:2, followed by roasting at 300 °C for a span of 1 h. Application of chloridized roasting orchestrates the transformation of copper and nickel into soluble metal chlorides, while concurrently inducing conversion of iron into a stable iron oxide state. Subsequent stages encompass the separation of copper and nickel from the water leach liquor, achieved through solvent extraction techniques utilizing LIX84I and Cyanex 272 as extractants. Rigorous characterization efforts, employing techniques such as X-ray Diffraction (XRD) and Scanning Electron Microscopy coupled with Energy Dispersive X-ray Spectroscopy (SEM-EDS), are undertaken to elucidate the attributes of the raw material and solid residues. Remarkably, the comprehensive isolation of copper, nickel, and iron is realized without generation of any effluents, ensuring preservation of environmental equilibrium. |
| first_indexed | 2024-04-24T10:02:52Z |
| format | Article |
| id | doaj.art-3663950ef004479bbd09611b407db81d |
| institution | Directory Open Access Journal |
| issn | 2949-7507 |
| language | English |
| last_indexed | 2024-04-24T10:02:52Z |
| publishDate | 2024-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Waste Management Bulletin |
| spelling | doaj.art-3663950ef004479bbd09611b407db81d2024-04-13T04:21:53ZengElsevierWaste Management Bulletin2949-75072024-06-0122113121Extraction of metal values from iron-rich mine tailings via chloridized roasting and water leachingSwati Pramanik0Aarti Kumari1S.K. Sahu2Basudeb Munshi3Metal Extraction & Recycling Division, CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India; Department of Chemical Engineering, National Institute of Technology, Rourkela 769008, IndiaDepartment of Fuel, Minerals & Metallurgical Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-NML, Jamshedpur 831007, IndiaMetal Extraction & Recycling Division, CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-NML, Jamshedpur 831007, India; Corresponding author at: Metal Extraction and Recycling Division, CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India.Department of Chemical Engineering, National Institute of Technology, Rourkela 769008, IndiaThe surge in mining and mineral processing to meet metal demand has led to accumulation of mining by-products like tailings, waste rocks, and acid mine drainage, containing high iron, copper, nickel, and zinc concentrations. These residues pose environmental threats. The concept of technospheric mining aims to repurpose these wastes for beneficial uses, reducing disposal and ecological impact while benefiting stakeholders. Within this context, the present investigation focuses on the discriminative retrieval of copper and nickel from mine tailings characterized by elevated iron content. This is achieved through formulation of an energy-efficient technique designed to surmount the challenge of iron co-extraction during hydrometallurgical processes aimed at extracting and recuperating metal values from intricate phases. The proposed method entails the amalgamation of mine tailings and solid NH4Cl in a stoichiometric ratio of 1:2, followed by roasting at 300 °C for a span of 1 h. Application of chloridized roasting orchestrates the transformation of copper and nickel into soluble metal chlorides, while concurrently inducing conversion of iron into a stable iron oxide state. Subsequent stages encompass the separation of copper and nickel from the water leach liquor, achieved through solvent extraction techniques utilizing LIX84I and Cyanex 272 as extractants. Rigorous characterization efforts, employing techniques such as X-ray Diffraction (XRD) and Scanning Electron Microscopy coupled with Energy Dispersive X-ray Spectroscopy (SEM-EDS), are undertaken to elucidate the attributes of the raw material and solid residues. Remarkably, the comprehensive isolation of copper, nickel, and iron is realized without generation of any effluents, ensuring preservation of environmental equilibrium.http://www.sciencedirect.com/science/article/pii/S2949750724000300Technospheric miningHydrometallurgyChloridized roastingSolvent extraction |
| spellingShingle | Swati Pramanik Aarti Kumari S.K. Sahu Basudeb Munshi Extraction of metal values from iron-rich mine tailings via chloridized roasting and water leaching Waste Management Bulletin Technospheric mining Hydrometallurgy Chloridized roasting Solvent extraction |
| title | Extraction of metal values from iron-rich mine tailings via chloridized roasting and water leaching |
| title_full | Extraction of metal values from iron-rich mine tailings via chloridized roasting and water leaching |
| title_fullStr | Extraction of metal values from iron-rich mine tailings via chloridized roasting and water leaching |
| title_full_unstemmed | Extraction of metal values from iron-rich mine tailings via chloridized roasting and water leaching |
| title_short | Extraction of metal values from iron-rich mine tailings via chloridized roasting and water leaching |
| title_sort | extraction of metal values from iron rich mine tailings via chloridized roasting and water leaching |
| topic | Technospheric mining Hydrometallurgy Chloridized roasting Solvent extraction |
| url | http://www.sciencedirect.com/science/article/pii/S2949750724000300 |
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