Browsing by Author "Dejene Amane"

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    The Flotation Response of Dedo Coal Deposit, Jimma Ethiopia: Implication to Improve the Quality of Coal
    (Addis Ababa University, 2023-06) Dejene Amane; Melesse Alemayehu (PhD)
    The purpose of this study was to investigate the flotation response of the Dedo coal deposit and to improve its quality. In this project, chemical reagents were used to induce hydrophobicity in hydrophilic coal particles present in coal slurry, and particularly froth flotation techniques were employed. To obtain a general understanding of the floating response of coal from the study area, the yield of floated coal was estimated. The quality of coal before beneficiation (froth flotation) in this project was characterized by a moisture content of 13.63%, volatile matter of 33.45%, ash of 25.66%, sulfur of 0.36%, and calorific value of 4806 cal/gm. After beneficiation, the moisture content was 11.06%, volatile matter was 25.63%, ash was 20.28%, sulfur was 0.25%, and calorific value was 5029.38 cal/gm. These results indicate that impurity contents such as ash, mineral matter, and sulfur resources were reduced, and the calorific value of coal was increased by applying successful froth flotation