Sign in to use this feature.

Years

Between: -

Subjects

remove_circle_outline
remove_circle_outline

Journals

Article Types

Countries / Regions

Search Results (1)

Search Parameters:
Keywords = nickeliferous pyrrhotite

Order results
Result details
Results per page
Select all
Export citation of selected articles as:
14 pages, 5850 KB  
Article
Ferric Sulfate Leaching of Pyrrhotite Tailings between 30 to 55 °C
by Nazanin Samadifard, Cheryl E. Devine, Elizabeth Edwards, Krishna Mahadevan and Vladimiros G. Papangelakis
Minerals 2015, 5(4), 801-814; https://doi.org/10.3390/min5040526 - 27 Nov 2015
Cited by 12 | Viewed by 6319
Abstract
Mine tailings present major environmental issues in the mining industry. However due to the depletion of high-grade sulfide ores for metal recovery, tailings could also be a potential resource for certain valuable metals. The present study investigates the potential to recover nickel from [...] Read more.
Mine tailings present major environmental issues in the mining industry. However due to the depletion of high-grade sulfide ores for metal recovery, tailings could also be a potential resource for certain valuable metals. The present study investigates the potential to recover nickel from pyrrhotite tailings. Leaching tests were performed in acidic ferric sulfate media with 0.14 wt % solids to keep the ferric concentration essentially constant. The temperature was varied between 30 and 55 °C, and the ferric concentration was in a range 0.02–0.3 M. The results showed that both temperature and ferric sulfate concentration had significant effects on the nickel extraction kinetics. The shrinking core model (SCM) was applied to the nickel extraction data. The rate controlling step was found to be product layer diffusion. The Arrhenius plot yielded an activation energy of Ea = 62.12 kJ/mol based on apparent reaction rates obtained by the SCM. The reaction order with respect to ferric ion was found to be 1 at the high concentration range. SEM images of partially leached tailings confirmed the presence of elemental sulfur around the pyrrhotite particles, which was responsible for the observed non-linear leaching kinetics (diffusion control). Full article
Show Figures

Figure 1

Back to TopTop