ABSTRACT Millions of tons of tailing dump at Rayfield mine in Jos in North Central Plateau state of Nigeria
have been found to contain large quantity of columbite. Initial attempts to recover columbite
concentrates by local miners and mineral speculators from the columbite rich tailing dump
failed due to the ineffective processing route employed. Using cone and quartering sampling
method, 0.5 kg of the columbite tailing was obtained for sieve and chemical analyses. 50 kg of
<1mm fraction of the sample was subjected to a first stage magnetic concentration in a three
poles Dry High Intensity Magnetic Separator (DHMS) that separated the columbite in the third
pole. The re-grind of the + 0.355 mm rougher concentrate fraction (containing interlocking
columbite) to pass the sieve aperture was treated on the DHMS in the second stage. The rougher
concentrate undersize and columbite pre-concentrate of the first stage magnetic separation were
then gravity concentrated on the air float machine. The Rayfield tailings and final concentrate
were assayed using ED-XRFS to obtain 12.5% and 69.6% Nb2O5, respectively. The recovery and
separation efficiency were 77.95% and 77.88% in that order. The magnetic and gravity
concentrations were found effective at 77.95% recovery for columbite from the Rayfield tailing
dump. This study also provided database for optimum recovery of columbite from tailings of
mining sites of similar composition.
Cite this paper
F. Ayeni, I. Madugu, P. Sukop, S. Ibitoye, A. Adeleke and M. Abdulwahab, "Secondary Recovery of Columbite from Tailing Dump in Nigerian Jos Mines Field," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 6, 2012, pp. 587-595. doi: 10.4236/jmmce.2012.116042.
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