Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
579162 | Journal of Hazardous Materials | 2011 | 10 Pages |
Abstract
⺠In this paper we studied pre-treatments of spent hydrotreating catalysts before hydrometallurgical processes aimed at the recovery of valuable metals (Ni, Co, V, and Mo). ⺠Pre-treatments, usually used in mining industry, are: attrition, flotation, and grain size separation. ⺠Influence of other pre-treatments were evaluated: preliminary grinding and roasting stage. ⺠Extraction of metals was tested using alkaline and acid leaching. ⺠Tests demonstrated that some pre-treatments are not able to concentrate metals, but others can improve the extraction of them in the leaching stage.
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Authors
Francesco Ferella, Albena Ognyanova, Ida De Michelis, Giuliana Taglieri, Francesco Vegliò,