Ambient Temperature Ferrite Process for Acid Rock Drainage Treatment

Choung, J. W. ; Xu, Z. ; Finch, J. A.
Organization: Society for Mining, Metallurgy & Exploration
Pages: 11
Publication Date: Jan 1, 2000
Acid rock drainage (ARD) is a recognized environmental challenge facing mining industries. An ambient temperature ferrite (ATF) process has been investigated for treating ARD. Most nonferrous metal and calcium ions present in typical ARDs were found to be detrimental to the ATF process. Three approaches were examined, including C02 aeration, addition of complex agents and use of magnetic seeds. By introducing magnetic seeds in the ATF process, the interferences were minimized and all the precipitates formed with lime neutralization were magnetically recovered from a simulated ARD. The residual concentrations of major metal ions in the treated water were environmentally acceptable. The XRD pattern confirmed the spinel ferrite crystal structure of the products
Full Article Download:
(805 kb)