Selective leaching of nickel from prereduced limonitic laterite under moderate HPAL conditions- part I: Dissolution
High pressure acid leaching (HPAL) is the primary method for extraction of nickel from limonitic laterite. The severe operating conditions, the complexity of facilities, and several technical problems, such as scale formation, have always accompanied the HPAL, however. In this paper, the...
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University of Belgrade, Technical Faculty, Bor
2016-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2016/1450-53391600023C.pdf |
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| author | Chang Y. Zhao K. Pešić B. |
| author_facet | Chang Y. Zhao K. Pešić B. |
| author_sort | Chang Y. |
| collection | DOAJ |
| description | High pressure acid leaching (HPAL) is the primary method for extraction of
nickel from limonitic laterite. The severe operating conditions, the
complexity of facilities, and several technical problems, such as scale
formation, have always accompanied the HPAL, however. In this paper, the
selective acid leaching of nickel from the pre-reduced limonitic laterite
under moderate HPAL conditions was studied. For the calcine with reduction
degree of 93.4%, about 88.2% nickel could be selectively extracted at 100°C
with an acid/ore ratio of 0.164, leaving less then 5.0g/L iron in the
solution. Further increase of leaching temperature, and the ensuing
dehydration, transformed goethite in the leaching residue to hematite. When
the temperatures were as high as 180°C, the recovery of nickel increased to
95.2%, within one hour, depressing the residual soluble iron to below 1.0g/L
(pO2= 1.0 MPa, acid/ore= 0.287). |
| format | Article |
| id | doaj-art-aa60a60bf0e94db3bc3bba3a28489440 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-aa60a60bf0e94db3bc3bba3a284894402025-02-02T13:59:46ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752016-01-0152212713410.2298/JMMB151102023C1450-53391600023CSelective leaching of nickel from prereduced limonitic laterite under moderate HPAL conditions- part I: DissolutionChang Y.0Zhao K.1Pešić B.2Northeastern University, School of Materials & Metallurgy, Shenyang, P.R. ChinaNortheastern University, School of Materials & Metallurgy, Shenyang, P.R. ChinaUniversity of Idaho, Department of Chemical and Materials Engineering, Moscow, USAHigh pressure acid leaching (HPAL) is the primary method for extraction of nickel from limonitic laterite. The severe operating conditions, the complexity of facilities, and several technical problems, such as scale formation, have always accompanied the HPAL, however. In this paper, the selective acid leaching of nickel from the pre-reduced limonitic laterite under moderate HPAL conditions was studied. For the calcine with reduction degree of 93.4%, about 88.2% nickel could be selectively extracted at 100°C with an acid/ore ratio of 0.164, leaving less then 5.0g/L iron in the solution. Further increase of leaching temperature, and the ensuing dehydration, transformed goethite in the leaching residue to hematite. When the temperatures were as high as 180°C, the recovery of nickel increased to 95.2%, within one hour, depressing the residual soluble iron to below 1.0g/L (pO2= 1.0 MPa, acid/ore= 0.287).http://www.doiserbia.nb.rs/img/doi/1450-5339/2016/1450-53391600023C.pdfnickelselective leachingreductive roastinggoethitehematite |
| spellingShingle | Chang Y. Zhao K. Pešić B. Selective leaching of nickel from prereduced limonitic laterite under moderate HPAL conditions- part I: Dissolution Journal of Mining and Metallurgy. Section B: Metallurgy nickel selective leaching reductive roasting goethite hematite |
| title | Selective leaching of nickel from prereduced limonitic laterite under moderate HPAL conditions- part I: Dissolution |
| title_full | Selective leaching of nickel from prereduced limonitic laterite under moderate HPAL conditions- part I: Dissolution |
| title_fullStr | Selective leaching of nickel from prereduced limonitic laterite under moderate HPAL conditions- part I: Dissolution |
| title_full_unstemmed | Selective leaching of nickel from prereduced limonitic laterite under moderate HPAL conditions- part I: Dissolution |
| title_short | Selective leaching of nickel from prereduced limonitic laterite under moderate HPAL conditions- part I: Dissolution |
| title_sort | selective leaching of nickel from prereduced limonitic laterite under moderate hpal conditions part i dissolution |
| topic | nickel selective leaching reductive roasting goethite hematite |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2016/1450-53391600023C.pdf |
| work_keys_str_mv | AT changy selectiveleachingofnickelfromprereducedlimoniticlateriteundermoderatehpalconditionspartidissolution AT zhaok selectiveleachingofnickelfromprereducedlimoniticlateriteundermoderatehpalconditionspartidissolution AT pesicb selectiveleachingofnickelfromprereducedlimoniticlateriteundermoderatehpalconditionspartidissolution |