Froth Flotation Method

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1Abstract
The aim of this research work is to desulfurize indigenous coal by one of the demineralization method to make it feasible for use in power generation and cement industries. Froth flotation method is an efficient method for reduction in sulfur and ash content. The underlying principle of the said process is formation of the froth upon contact of frother with coal particles. Pine oil dosage being the control parameter, the analysis showed that maximum sulfur reduction of 33 % was obtained for 30 minutes flotation time, reducing sulfur content of cherat coal sample from 3.6 % to 2.4 %. It was found that froth flotation caused significant reduction in sulfur content of Cherat coal, yet the power generation requirements of sulfur content …show more content…

Sulfur being hydrophobic in nature is removed by froth flotation process. Generally this process is used for the coal particle size less than 0.5mm. The carbonaceous mineral constituents of coal being hydrophilic in nature, can be made to preferentially attach to fine bubbles and float to the surface of a dilute slurry, where they can be removed, while in contrast the low carbonaceous inert minerals of the raw coal do not attach to the bubbles [3]. Flotation reagent cost adds up to the processing cost which makes the flotation method more expensive than other physical methods. Yet, to remove inorganic materials viz. pyritic sulfur, the most suitable process is flotation to clean coal provided it is liberated in feed …show more content…

The more the flotation time, an enhanced desulfurization of coal occurs. A lot of work has to be done further by changing the amount and the type of frothers activators and collectors.
References:
[1] Singh R, Sinha SN. Beneficiation of high ash Indian coal-problems and prospects. Indian Min Eng J 2003:1-4.
[2] Haidar DD. Beneficiation of non-coking coals: basic concepts and technology routes. In: Singh R, Das A, Banerjee PK, Bhattacharya KK, Goswami NG, editors. Proceedings of the XI International Seminar on Mineral Processing Technology (MPT-2010). Jamshedpur: Allied publishers; 2010. p. 419-27.
[3] Couch GR. Advanced coal cleaning technology, IEA Coal Research. IEA Coal Research Publishers; 1991.
[4] Ozgen S, Tiirksoy VO, Sabah E, Oruc; F. Process development studies on recovery of clean coal from ultra fine hard coal tailings using enhance gravity separator. Can J Chem Eng 2009;87:715-25
[5] Baruah MK, Kotoky P, Baruah J, Bora GC. Cleaning of Indian coals by agglomeration with xylene and hexane. Sep Purif Technol 2000;20:235-41..
[6] American Society for Testing and Materials. ASTM D-3173; 1993. p. 322-3.
[7] American Society for Testing and Materials. ASTM D-3175; 1993. p.

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