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Leaching characteristics of nickeliferous pyrrhotite tailings from the Sudbury, Ontario area
- Source :
- Canadian Metallurgical Quarterly. 56:372-381
- Publication Year :
- 2017
- Publisher :
- Informa UK Limited, 2017.
-
Abstract
- Mineralogical characterisation showed the deportment of Ni to be similar in the Vale and Glencore tailings, with 60% of the total Ni locked in pyrrhotite, and the balance 40% associated with pentlandite. Nickel leaching was correlated with the dissolution extents of pyrrhotite and pentlandite as functions of four leaching regimes: ‘anoxic acid’ (with and without pH control), ‘oxic acid’ (oxygen sparging), ‘oxic acid’ (air sparging), and ‘oxic ferric’ (air sparging). The results showed that the maximum Ni dissolution was obtained during the pH controlled oxic acid leach with oxygen sparging at pH 1.5, while the anoxic acid leach at pH 1.5 resulted in minimum Ni dissolution (10–15%) from pyrrhotite. An overall Ni mass balance showed that pyrrhotite and pentlandite dissolve simultaneously in the presence of Fe(III) and oxygen, in contrast to the preferential dissolution of pyrrhotite in the absence of Fe(III). Elemental sulphur yield increased with increasing temperature, but no observable trend coul...
- Subjects :
- Pentlandite
Metals and Alloys
chemistry.chemical_element
Mineralogy
02 engineering and technology
010501 environmental sciences
engineering.material
01 natural sciences
Tailings
Anoxic waters
Industrial and Manufacturing Engineering
020501 mining & metallurgy
Nickel
0205 materials engineering
chemistry
Environmental chemistry
engineering
Leaching (metallurgy)
Air sparging
Pyrrhotite
Dissolution
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 18791395 and 00084433
- Volume :
- 56
- Database :
- OpenAIRE
- Journal :
- Canadian Metallurgical Quarterly
- Accession number :
- edsair.doi...........03fa42739389a277d7475b7700f80f92