Role of the reducing agent in tungsten extraction by chlorination with chlorine from an ore enriched by physical means
Abstract The effect of three reducing agents (sulphur dioxide, pyrite and carbon) on tungsten extraction from a scheelite-wolframite concentrate with chlorine gas was assessed. A low-grade ore (0.9% w/w WO3) was collected in the San Martín department, San Luis Province, Argentina, and subsequently e...
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| Format: | Article |
| Language: | English |
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Fundação Gorceix
2022-09-01
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| Series: | REM: International Engineering Journal |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2022000400329&tlng=en |
| _version_ | 1797995443135709184 |
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| author | Carlos J. Menéndez Eduardo L. Tavani |
| author_facet | Carlos J. Menéndez Eduardo L. Tavani |
| author_sort | Carlos J. Menéndez |
| collection | DOAJ |
| description | Abstract The effect of three reducing agents (sulphur dioxide, pyrite and carbon) on tungsten extraction from a scheelite-wolframite concentrate with chlorine gas was assessed. A low-grade ore (0.9% w/w WO3) was collected in the San Martín department, San Luis Province, Argentina, and subsequently enriched by physical means (65.73% w/w WO3). The minerals identified and their reactivities with chlorine were: scheelite (reactive), wolframite (reactive), pyrite (reactive), quartz (inert) and feldspars (inert). The metal recovered as WO2Cl2, with the different reagent combinations, was in increasing order: Cl2 + N2 < Cl2 + SO2 < pyrite + Cl2 + N2 < pyrite +Cl2 + SO2 < carbon + Cl2 + N2. It was proved that, according to its content, the pyrite initially present in the ore improves chlorination performance. At the same time, the non-volatile reaction products formed - CaCl2 and/or CaSO4 - and the manner of removing the nascent (desorbed) oxygen change depending on the reducing agent tested. |
| first_indexed | 2024-04-11T10:00:22Z |
| format | Article |
| id | doaj.art-47ab95941281433a8c010a8422034ba5 |
| institution | Directory Open Access Journal |
| issn | 2448-167X |
| language | English |
| last_indexed | 2024-04-11T10:00:22Z |
| publishDate | 2022-09-01 |
| publisher | Fundação Gorceix |
| record_format | Article |
| series | REM: International Engineering Journal |
| spelling | doaj.art-47ab95941281433a8c010a8422034ba52022-12-22T04:30:25ZengFundação GorceixREM: International Engineering Journal2448-167X2022-09-0175432933610.1590/0370-44672021750032Role of the reducing agent in tungsten extraction by chlorination with chlorine from an ore enriched by physical meansCarlos J. Menéndezhttps://orcid.org/0000-0001-5112-292XEduardo L. Tavanihttps://orcid.org/0000-0003-4145-7800Abstract The effect of three reducing agents (sulphur dioxide, pyrite and carbon) on tungsten extraction from a scheelite-wolframite concentrate with chlorine gas was assessed. A low-grade ore (0.9% w/w WO3) was collected in the San Martín department, San Luis Province, Argentina, and subsequently enriched by physical means (65.73% w/w WO3). The minerals identified and their reactivities with chlorine were: scheelite (reactive), wolframite (reactive), pyrite (reactive), quartz (inert) and feldspars (inert). The metal recovered as WO2Cl2, with the different reagent combinations, was in increasing order: Cl2 + N2 < Cl2 + SO2 < pyrite + Cl2 + N2 < pyrite +Cl2 + SO2 < carbon + Cl2 + N2. It was proved that, according to its content, the pyrite initially present in the ore improves chlorination performance. At the same time, the non-volatile reaction products formed - CaCl2 and/or CaSO4 - and the manner of removing the nascent (desorbed) oxygen change depending on the reducing agent tested.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2022000400329&tlng=ensulphur dioxidepyritecarbonscheelite-wolframite concentratefree energy change. |
| spellingShingle | Carlos J. Menéndez Eduardo L. Tavani Role of the reducing agent in tungsten extraction by chlorination with chlorine from an ore enriched by physical means REM: International Engineering Journal sulphur dioxide pyrite carbon scheelite-wolframite concentrate free energy change. |
| title | Role of the reducing agent in tungsten extraction by chlorination with chlorine from an ore enriched by physical means |
| title_full | Role of the reducing agent in tungsten extraction by chlorination with chlorine from an ore enriched by physical means |
| title_fullStr | Role of the reducing agent in tungsten extraction by chlorination with chlorine from an ore enriched by physical means |
| title_full_unstemmed | Role of the reducing agent in tungsten extraction by chlorination with chlorine from an ore enriched by physical means |
| title_short | Role of the reducing agent in tungsten extraction by chlorination with chlorine from an ore enriched by physical means |
| title_sort | role of the reducing agent in tungsten extraction by chlorination with chlorine from an ore enriched by physical means |
| topic | sulphur dioxide pyrite carbon scheelite-wolframite concentrate free energy change. |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2022000400329&tlng=en |
| work_keys_str_mv | AT carlosjmenendez roleofthereducingagentintungstenextractionbychlorinationwithchlorinefromanoreenrichedbyphysicalmeans AT eduardoltavani roleofthereducingagentintungstenextractionbychlorinationwithchlorinefromanoreenrichedbyphysicalmeans |