Browsing by Author "Dunga, George Thomas"

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    THE EFFECTS OF CALCINATION ON THE BENEFICIATION OF KOTON KARFE IRON ORE
    (Department of Geology and Mining, Nasarawa State University, Keffi, 2008-11-22) Dunga, George Thomas; Jatau, B.S.; Yaro, S. A.
    The effects of calcination on the beneficiation of Koton Karfe iron ore was investigated, the Koton Karfe iron ore is located in Igbide village of Lokoja local Government area of Kogi State, Nigeria with a proven resetwe of850million tonnes. The ore samples were source from two different pits of land 2, 400m apart with pitl sample collected 6m deep beneath the outcrop. The chemical and mineralogical characteristic of the ore samples was investigated using X-ray diffractometer [XRD], X-ray Fluorescence Spectrophotometer [XRFJ, gravimetric method of chemical analysis and metallographic techniques. The results of the chemical analysis revealed that the Koton Karfe iron ore of pit 1 contained a total iron content (43.40% Fed, 10.14% (SiOd, 1.24% calcium (Ca), 0.70% manganese (Mn), 0.10% and 0.0051% strontium (Sr) while pit2 contained 0.9% Titanium (Ti), 1.56% manganese, 26.50%Fer, 0.041% zircon (Zr), 0.0020%nobium(Nb) and 39.48%oSilica(SiOd, Phosphorus (P) and Sulphur (S) were beyond the limit of detection in both the samples of pit land 2 of the ore deposit. The results obtained from the calcination action on the sample of pitl revealed that calcination have greater effects on the ore in which the action lead to the increased in the total iron from 43.40% of the head sample to 64.80% after calcination and then 69.10% after concentration using magnetic separation technique at sieved size fraction - 180 -rJ25um while silica contents of the various sieved size fractions samples decreased in the reversed manner, also the physical magnetic property of the ore sample improved thereby enhancing better recoveries values of the various concentrated sieved size fractions. These values obtained for the sieved size fractions and concentrates after calcination and concentration could be used for blast furnace process for sinters production and super concentrates for pellets production because the values compared favourable with 63% and 66.80% stated for the both processes, thus making Koton Karfe another potential source of iron ore deposit in Nigeria.