International Journal of Oil, Gas and Coal Engineering 2018; 6(4): 74-80 http://www.sciencepublishinggroup.com/j/ogce doi: 10.11648/j.ogce.20180604.15 ISSN: 2376-7669 (Print); ISSN: 2376-7677(Online) Investigation and Comparison of Emulsified Diesel Oil and Flomin C 9202 as a Collector in the Beneficiation of Ultra-Fine Coal by Agglo-Flotation Richard Muthui Kasomo 1, * , Sammy Ombiro 2 , Bernard Rop 3 , Nicholas Muthama Mutua 4 1 School of Mines and Engineering, Mining and Mineral Processing Engineering Department, Taita Taveta University, Voi, Kenya 2 Pan African University, Institute of Life and Earth Science (Including Health and Agriculture), University of Ibadan, Ibadan, Nigeria. 3 School of Mechanical and Materials Engineering, Mining, Materials & Petroleum Engineering Department, Jomo Kenyatta University of Agriculture & Technology, Nairobi, Kenya 4 School of Science and Informatics, Mathematics and Informatics Department, Taita Taveta University, Voi, Kenya Email address: * Corresponding author To cite this article: Richard Muthui Kasomo, Sammy Ombiro, Bernard Rop, Nicholas Muthama Mutua. Investigation and Comparison of Emulsified Diesel Oil and Flomin C 9202 as a Collector in the Beneficiation of Ultra-Fine Coal by Agglo-Flotation. International Journal of Oil, Gas and Coal Engineering. Vol. 6, No. 4, 2018, pp. 74-80. doi: 10.11648/j.ogce.20180604.15 Received: July 10, 2018; Accepted: July 23, 2018; Published: August 18, 2018 Abstract: Modern mechanized mining techniques produce enormous quantities of coal fines. Reagents regime (i.e. reagents usage and reagent type) is an important fundamental factor in the process of recovering and dashing of ultra-fine coals (coal fines). The other factors that are crucial for recovery and the purity of the final product obtained is the nature of the particle size of the solids as well as the adsorption of the reagent on the solid particles surface among others. Coal concentrators and mills have embark on the strategy of establishment fine coal benefaction reagents which are not only cheap but effective and efficient. In this study, the effects of both the Flomin C 9202 and Emulsified light diesel oil are investigated in regards to their performance on the combustible recovery as well as the ash remaining in the clean coal product. The study, further involves grinding the coal sample to obtain the fines sizes, flocculate the fines to get the agglomerates and finally float them, what is commonly referred to as Agglo-flotation. The results for both Flomin C 9202 and emulsified light diesel oil were analyzed and after obtaining the best collector (which in this case was Flomin C 9202) then the flowsheet was there after determined. The batch tests for collector determination showed that the Flomin C 9202 outperformed the emulsified diesel oil, and after conducting two stages flowsheet with the collector (Flomin C9202), the ash content was reduced from 22.78%(original coal sample) to 7.91% while the combustible recovery increased from 77.44% (original coal sample) to 92.85%. Keywords: Flomin C9202, Emulsified Light Diesel Oil, Agglo-Flotation and Flowsheet 1. Introduction The proportion of ultra-fine coal in run- of- mine, worldwide, drastically increases with increased mechanization, modernization of coal mining and cleaning methods [1, 2, 11]. The need for the production of super-pure concentrates to prepare water-coal fuel and deep cleaning so as to desulphurize power-generating coals is the second major reason as to why there is an increased coal slimes in the coal concentrators and mills [2]. Coal slimes in mineral processing facilities are further increased by mining coal of low ranks, as well as cleaning coal using convectional techniques such as dense medium