Browsing by Author "Ewunetu Mitku"

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    Beneficiation of Blended Coal by Froth flotation Technique, In The case of Kripto Coal Mining and Chemicals PLC Elasanchano Woreda Konta Zone South West Region of Ethiopia
    (Addis Ababa University, 2025-03) Ewunetu Mitku; Mulugeta Sisay (PhD); Mamaru Genetu (Mr.) Co-Advisor
    Beneficiation of blended coal in the case of Kripto coal mining and chemicals plc located Elasanchano woreda konta zone, south western part of Ethiopia using kerosene as a collector n-octanol as afrother sodium silicate as a depressant with aeration speed of 1850 r/pm to facilitate the formation of small bubble enhance the calorific value of blended coal in the three flotation parameters studied in this project. which is particle size, frother dosage and flotation time is investigated. The optimal particle size we get maximum combustible recovery and quality is +125+-250 μm particle size which have 35.699% recovery and its heating value measured in boom calorimeter is 6,047.5781Ca/gram. The optimal frother dosage we get maximum recovery and grade is 6ml of n-octanol which have 65.157% recovery and its heating value is 6,412.7735 Ca/gram. The optimal flotation time we get high combustible recovery and quality of coal is 10 minute which have 70.426% of recovery and its calorific value is 5,894.4779 Cal/gram. Generally, froth flotation technique is good for environmentally friend method for the reduction of sulfur content in coal which reduce the release of SO2 gas cause for the formation of acid rain and health risks including lung cancer in humans. This project reduces the sulfur content of blended coal 0.68% to 0.44%. So, froth flotation is an appropriate method for the enhancement of heating value and proximate and ultimate characteristics of coal by removing the impurities from coal.