| 1. |
- Mutambi, Joshua, et al.
(author)
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Research on the State of Business Incubation Systems in Different Countries : Lessons for Uganda
- 2010
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In: African Journal of Science, Technology, Innovation and Development (AJSTID). - : Adonis & Abbey Publishers Ltd. - 2042-1338 .- 2042-1346. ; 2:2, s. 190-214
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Journal article (peer-reviewed)abstract
- Small and Medium sized enterprises have proven to be capable of catalyzing national economies owing to their high growth potential, their role in promoting innovations, employment creation and economic development. However, in the early days of their growth period, these firms face difficulties that may lead to their failure. Business incubation has been identified as an effective growth mechanism for such entrepreneurial firms. This paper mainly looked at the concept and description of business incubation, development process and contribution of incubators to start-up firms. It examined the impact to regional entrepreneurship and economic development globally. The paper concluded by highlighting the existing incubators in Uganda and identified recommendations for strengthening the business incubation in Uganda.
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| 2. |
- Mutambi, Joshua, et al.
(author)
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Transferring Best Practices for Uganda Technological Innovation and Sustainable Growth
- 2011
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Conference paper (peer-reviewed)abstract
- Uganda, like many other African countries has not been developing primary science, technology and innovation Indicators and to make them accessible to public and private sector decision makers for social economic development and investment purposes. Indicators have not been given serious attention as engines of long-term development. This paper reports the results of a research undertaken to develop a set of relevant science, technology and innovation Indicators for Uganda. From a population of 7,336 firms, 300 firms were sampled for innovation surveys and 200 institutions for the Research and Development survey. The data collected were represented in tables and was grossed up. Data entry was taken in CSPRO and the analysis was done using STATA statistical software There is a global perception that businesses in developing countries like Uganda are generally dominated by Small and Medium enterprises; and that is where most innovations were happening. This paper will discuss the core indicators of Research and Development (R&D) and Innovation; the empirical data of the state of Uganda’s Science, Technology and Innovation Indicators. The paper further explores the potential benefits and the best practices in incubation process. The major conclusions are; prioritizing science and technology policy will create more opportunities and build capabilities for innovations and technology. The monitoring of industry, government and university R&D programs is crucial to successful policy making and analysis.
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| 3. |
- Muwanguzi, Abraham Judah Bumalirivu, et al.
(author)
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Application of different models for the prediction of the kinetics of direct reduction of natural iron ores
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Other publication (other academic/artistic)abstract
- Simulation of the direct reduction conditions was performed in a laboratory furnace. Lump samples from natural hematite iron ore were reduced by a gas mixture of H2 and CO (H2/CO =1.5) at temperatures 700, 800 and 900°C. The effect of reduction temperature on the reduction degree, reduction rate of samples and carbon deposition were investigated and discussed in this study. The thermo-gravimetric data obtained from the reduction experiments was run in a programme that calculates the solid conversion rate. Also, three models: i) Grain Model (GM), ii) Volumetric Model (VM) and iii) the Random Pore Model (RPM), were used to estimate the reduction kinetics of natural iron ores. It was found that the RPM model result agreed best with the obtained experimental results. Furthermore, it gave better predictions of the natural iron oxide conversion and thereby the reduction kinetics.
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| 4. |
- Muwanguzi, Abraham Judah Bumalirivu, et al.
(author)
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Characterisation of the physical and metallurgical properties of Muko iron ore for iron production
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Other publication (other academic/artistic)abstract
- The blast furnace is still the dominant form of iron production, but over the years direct reduction methods have been consistently gaining ground due to a number of reasons. All the iron production methods have optimal requirements for the feed materials especially iron ore. Tests were carried out on Muko iron ore from Uganda to analyse its capacity to meet the feed requirements for the dominant iron production methods used today. Determination of the tumbler, abrasion and shatter indices, porosity and particle size distribution, thermo-analysis and reducibility were performed. Muko ore was found to have good mechanical properties with tumble and shatter index > 89.0 wt% and < 2.5 wt% respectively. The ore can also be easily reduced to particle size ranges suitable for the sintering operations. Its reducibility at 0.868%/min is within the acceptable range as a raw material feed for blast furnace and direct reduction furnaces. The energy requirement for heating the ore to 1100ºC was found to be higher in the samples with wider size range of irregular grains and biggest inclusions. It exhibits good physical and metallurgical properties to serve as a raw material for the blast furnace and direct reduction furnaces.
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| 5. |
- Muwanguzi, Abraham Judah Bumalirivu, et al.
(author)
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Characterisation of the Physical and Metallurgical Propertiesof Natural Iron Ore for Iron Production
- 2012
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In: ISRN Materials Science. - : Hindawi Publishing Corporation. - 2090-6080 .- 2090-6099. ; 2012, s. 9-
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Journal article (peer-reviewed)abstract
- The blast furnace is still the dominant form of iron production, but over the years, direct reduction methods have increased due to a number of reasons. Overall, iron production methods have optimal requirements with respect to the feed materials especially iron ore. In this study, tests were carried out on Muko iron ore from Uganda to analyse its suitability to meet the feed requirements of today's dominant iron production methods. More specifically, the Tumbler, Abrasion, and Shatter Indices of the ore were determined. In addition, porosity, thermoanalysis, and reducibility tests were performed. Overall, the Muko ore was found to have good mechanical properties exemplified with tumble and shatter index data >89.0 wt% and <2.5 wt%, respectively. Furthermore, its reducibility at 0.87%/min is within the acceptable range as a natural material feed for blast furnace and direct reduction furnaces. Also, the energy requirement for heating the ore to 1100°C was found to be higher in the samples containing a wider size range of irregular grains and the largest contaminations. In summary, it is concluded that the Muko iron ore has good physical and metallurgical properties to serve as a natural material for the blast furnace and direct reduction furnaces.
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| 6. |
- Muwanguzi, Abraham Judah Bumalirivu, et al.
(author)
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Characterization of chemical composition and microstructure of natural iron ore from Muko deposits
- 2012
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In: ISRN Materials Science. - : Hindawi Publishing Corporation. - 2090-6080 .- 2090-6099. ; 2012, s. 9-
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Journal article (peer-reviewed)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 (<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.
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| 7. |
- Muwanguzi, Abraham Judah Bumalirivu, et al.
(author)
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Characterization of chemical composition and microstructure of raw iron ore from Muko deposits in Uganda
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Other publication (other academic/artistic)abstract
- 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.
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| 8. |
- Muwanguzi, Abraham Judah Bumalirivu, et al.
(author)
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Investigation of direct reduction of lumps from natural hematite iron ore
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Other publication (other academic/artistic)abstract
- The effects of the main characteristics of hematite natural ore lumps such as weight and microstructure and the parameters of the direct reduction process (gas flow rate and temperature) on the reduction degree and thermo-mechanical degradation of iron ore lumps were investigated. Lumps from Muko deposit were used for direct reduction with H2/CO, ratio of 1.5. The temperature and gas flow rate ranged from 700-900°C and 0.25-1.0 L/min, respectively. The highest reduction degree (0.88-0.91) was obtained by direct reduction of 3-4 g samples at 900°C and 0.5 L/min. The effects of the flow rate of the reduction gas in the furnace and the carbon deposited on a sample surface on the accuracy of the weight measurement and the reduction degree by using the thermal gravimetric technique were estimated and discussed. It was further discovered that the natural microstructure of a lump iron ore has an effect on the reduction time.
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| 9. |
- Muwanguzi, Abraham Judah Bumalirivu, et al.
(author)
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Investigation of direct reduction of lumps from natural hematite iron ore
- 2013
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In: Research and Application of Material. - : Sciknow Publications. - 2328-5079.
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Journal article (other academic/artistic)abstract
- The effects of the main characteristics of hematite natural ore lumps such as weight and microstructure and the parameters of the direct reduction process (gas flow rate and temperature) on the reduction degree and thermo-mechanical degradation of iron ore lumps were investigated. Lumps from Muko deposit were used for direct reduction with H2/CO, ratio of 1.5. The temperature and gas flow rate ranged from 700-900°C and 0.25-1.0 L/min, respectively. The highest reduction degree (0.88-0.91) was obtained by direct reduction of 3-4 g samples at 900°C and 0.5 L/min. The effects of the flow rate of the reduction gas in the furnace and the carbon deposited on a sample surface on the accuracy of the weight measurement and the reduction degree by using the thermal gravimetric technique were estimated and discussed. It was further discovered that the natural microstructure of a lump iron ore has an effect on the reduction time.
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| 10. |
- Muwanguzi, Abraham Judah Bumalirivu, et al.
(author)
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State of the art paper on the exploitation of Uganda's iron ore for the manufacture of iron and steel in Uganda
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Other publication (other academic/artistic)abstract
- Development of a nation is catalyzed and set on a firm foundation and path if the natural resources within the country are optimally exploited. The citizens are empowered economically, regions in the nation grow in terms of infrastructure and service provision and a lot of foreign exchange is saved; as this would have been spent in importation of raw materials. Currently, Uganda imports about 85% of the iron and steel products used in its industrial sectors. The country is endowed with iron ore deposits in the east and southwestern part, Figure 1. Each of these deposits is estimated to have about 50 million tonnes of ore reserve, with a rich grade of iron, and the lay unexploited. This paper reviews the current and traditional means of extracting and refining iron ores. The occurrences of iron ores, qualities and characterization methods have been reviewed. The mechanical, thermo-physical and thermodynamic properties plus the metallurgical extraction of the ore are also included. The aim is to understand the properties of iron and the behaviour of these when subject to various conditions, plus the technology involved in the exploitation of iron ores for iron and steel production. This will be used as a basis for the production of iron and steel raw materials for Ugandan industries, by exploiting the locally available iron ores in Uganda.
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