Change search
ReferencesLink to record
Permanent link

Direct link
Characterization of chemical composition and microstructure of raw iron ore from Muko deposits in Uganda
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
Department of Mechanical Engineering, Faculty of Technology, Makerere Universty, Kampala, Uganda.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
(English)Manuscript (preprint) (Other academic)
Abstract [en]

This study aimed at investigating the chemical composition and microstructure of raw iron ore from the deposits in Muko area (south-western parts of Uganda). The quality of this iron ore was evaluated to establish its suitability to serve as a raw material for the different routes of 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 (< 6% SiO2 and 3-4% Al2O3) and low contents of the deleterious elements (P~0.02% and S<0.006%), which correspond to acceptable levels for commercial iron ores.


Keyword [en]
iron ore, hematite, chemical composition, microstructure, Uganda
URN: urn:nbn:se:kth:diva-25070OAI: diva2:355585
QC 20101007Available from: 2010-10-07 Created: 2010-10-07 Last updated: 2010-10-07Bibliographically approved
In thesis
1. Characterisation of Muko iron ores (Uganda( for defferent routes of iron production
Open this publication in new window or tab >>Characterisation of Muko iron ores (Uganda( for defferent routes of iron production
2010 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Iron and its products, especially the various forms of steel, have been and still are a vital material in many sectors of life. It is utilized in many industrial activities ranging from production of heavy duty mechanical equipment to light electrical appliances and home appliances. With the world‟s iron ore consumption estimated to stand at 1.3 billion tonnes by 2025, exploitation of any existing natural deposits is of increasing importance to meet the demands of the expanding world economy. Large deposits of iron ore exist in Uganda in the eastern (Tororo) regions and south-western (Kisoro-Kabale) regions of the country. The ore deposits of Kisoro-Kabale consist of an iron-rich hematite grade with less deleterious impurities as compared to that of Tororo. Prospective quantification puts the deposits at 30-50 million tonnes of raw-ore reserves. To date the deposits lay unexploited, with small holder black smith activities taking place in the area. This work involves understanding the occurrence, quantity and quality of the ore plus its properties and characteristics in a bid to pave way for its exploitation for economic use in Uganda and beyond. Characterisation was done on the samples collected from the deposits, to establish its physical, chemical and metallurgical properties. Literature detailing the natural occurrence of the deposits plus the genesis of the parent rocks and ore and the prospective tonnage is included. The economic situation in Uganda as far as demand and consumption of iron and steel is concerned is also briefly highlighted. The chemical, physical and metallurgical characteristics that could facilitate the initial exploitation of the ore are examined with conclusive results from the representative samples examined. The results present Muko ore as a high grade of hematite with an Fe content averaging 68%. The gangue content (SiO

2+Al2O3) of 5 of the 6 samples investigated is < 4%, which is within the tolerable limits for the dominant iron production processes, with its S and P contents being < 0.1% and 0.07% respectively. Thus, Muko iron ore can be reduced in the furnace without presenting major difficulties. With respect to mechanical properties, Muko ore was found to have a Tumble Index value > 85 wt%, an Abrasion Index value < 4 wt% and a Shatter Index value < 2.5 wt%. This implies that the ore holds its form during the processes of mining, transportation, screening and descent when loaded in the furnace for reduction. Its reducibility index was found to be 0.868%/min. This is well within the desired reduction limits for the major iron reduction processes. It implies that a high productivity (in terms of iron reduced) can be realised in the reduction processes in a given period of time. Muko iron ore was found to meet most of the feed raw material requirements (physical, chemical and metallurgical) for the blast furnace and the major direct reduction processes (Midrex, HYL III and SL/RN). Furthermore, for those desired for sinter and pellet making. It can thus serve well as a feed raw material for smelting reduction and direct reduction processes.

Place, publisher, year, edition, pages
Stockholm: E-Print, 2010. vii, 27 p.
iron ore, iron, characterization, physical and metallurgical properties, sinter, pellet, blast furnace, direct reduction, Muko, Uganda
National Category
Materials Engineering
Research subject
SRA - Production
urn:nbn:se:kth:diva-25037 (URN)978-91-7415-725-3 (ISBN)
2010-09-24, M 127, Brinellvagen 23, Stockholm, 13:00 (English)
Sustainable Technological Development in the Lake Victoria Region
XPRES - Initiative for excellence in production research
QC 20101007Available from: 2010-10-07 Created: 2010-10-06 Last updated: 2010-10-07Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Muwanguzi, Abraham Judah BumalirivuKarasev, Andrey V.
By organisation
Materials Science and Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 33 hits
ReferencesLink to record
Permanent link

Direct link