Characterization of Chemical Composition and Microstructure of Natural Iron Ore from Muko Deposits

Abstract

The study aimed at investigating the chemical composition and microstructure of raw iron ore from the deposits in Muko area (south-western Uganda). The quality of this iron ore was evaluated to establish its suitability to serve as a raw material for iron production. Samples were taken from the six hills of Muko ore deposits and tests carried out to establish their composition and properties. X-ray diffraction and scanning electron microscopy were employed in the investigation and chemical analysis performed to determine the compounds constituting the ore. The quality of this ore was compared to generalized world market standards and ores from other nations. It was found that Muko ore is a rich hematite grade with Fe content above 65%. It has little gangue (&lt;6% SiO 2 and 3-4% Al 2 O 3 ) and low contents of the deleterious elements (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi>P</mml:mi><mml:mo>~</mml:mo><mml:mn>0.02</mml:mn></mml:math>% and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mi>S</mml:mi><mml:mo>&lt;</mml:mo><mml:mn>0.006</mml:mn></mml:math>%), which correspond to acceptable levels for commercial iron ores.