Removal of molybdenum and heavy metals from effluents by flotation

Ramadorai, G. ; Hanten, J. P.
Organization: Society for Mining, Metallurgy & Exploration
Pages: 6
Publication Date: Jan 1, 1987
This paper presents laboratory and pilot plant data on the removal of heavy metals and molybdenum from mining-milling waste water. Molybdenum is removed as an Fe-Mo precipitate by proper addition of ferric sulfate. Heavy metals are lowered by lime treatment. Solid-liquid separation was achieved in both cases by flotation techniques. The Lectroclear electrocoagulation-electroflotation process was used to achieve the desired degree of metals removal. Good correlation was obtained on the laboratory and pilot plant scales. A two-step process consisting of the sequential removal of molybdenum and heavy metals was tested successfully using a mobile pilot plant. Preliminary data on sludge characteristics was obtained and the feasibility of recycling the iron sludge for iron and molybdenum recovery was established on the laboratory scale.
Full Article Download:
(391 kb)