STUDY OF AGGLOMERATION USING JATROPHA OIL ON THE BENEFICIATION OF FINE COALS
The processes of coal mining and coal cleaning result in the generation of fine coals which are usually discharged. These waste fine coals not only reduce the coal utilization, but also result in a detrimental effect on the environment. The waste itself, however, still can be used as a high energy s...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/17518 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The processes of coal mining and coal cleaning result in the generation of fine coals which are usually discharged. These waste fine coals not only reduce the coal utilization, but also result in a detrimental effect on the environment. The waste itself, however, still can be used as a high energy source. Therefore, the beneficiation of fine coals are required to cut the effect of discharged fine coals. Accordingly, the proposed oil agglomeration is a method that may resolve the problem.<p>The sample collected from Bunyu Island, East Kalimantan and used in this study, was a low rank coal with low ash content. Jatropha oil was used since it has so high viscosity and density that it is expected to produce a large amount of agglomerate. The study was carried out to examine the effect of the rate of stirring, the time of stirring, the used amount of the oil, the distribution of particle size, and the use of additive, on agglomeration product. A number of experiments has been conducted in different combination of variables to provide profiles that shows how each variable affects on agglomeration product (i.e. %-yield and %-ash content reduction).<p>Results from the experiments give the greater the rate of stirring, the bigger the %-yield of agglomerate. Yet when the agglomeration product reached the maximum point, the greater the rate of stirring, the lesser the %-yield of agglomerate. The same result happened on the time of stirring to the %-yield of agglomerate. Whereas, the larger the used amount of oil, the bigger the %-yield of agglomerate and the lesser the ash content.<p>Generally, particle size of -150 +75 um produced the highest %-yield than others. The use of additive had an effect to increase agglomeration product especially for particle size of -75 um, but hardly had effect on the ash content. The best condition in obtaining the maximum agglomeration product was done by having the rate of stirring of 750 rpm for 5 minutes, 30% jatropha oil mixed, and coal particle size of -150 +75 um, which resulted the maximum yield of agglomerate of 85,9% and reduced the ash content up to 26,65%. <br />
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