Abstract
In this study, physical cleaning of
Cayirhan region’s low-quality, high ash and sulphur content lignites was
investigated. Cleaning of coal was done with MGS and the effects of drum speed,
shake frequency and shake amplitude parameters on ash and combustible recovery
of obtained clean coal was examined. Experiments carried out in this study was
performed with using full factorial design and results were evaluated using
statistical methods.
At optimum conditions %52,81 ash content was obtained with %61.65 combustible
recovery from about %75 ash contented feed.
With statistical analysis, mathematical models were obtained for both
ash and combustible recovery in a good agreement with experimental values. (R2
values of 0.79 and 0.98 for ash content and combustible recovery respectively) In
addition, for both ash content and combustible recovery, drum speed is the
parameter that contributes most to the separation efficiency of the device. However,
studied levels of shake amplitude was statistically in insignificant at the 95%
confidence interval.
References
- Acıtaş, Ş. ve Şenoğlu B., İstatistiksel deney tasarımı: sabit etkili modeller, Nobel Yayın Dağıtım, Ankara, 2013.
- Aksoy, D. O., Aytar, P., Toptaş, Y., Çabuk, A., Koca, S., & Koca, H. (2014). Physical and physicochemical cleaning of lignite and the effect of cleaning on biodesulfurization. Fuel, 132, 158-164.
- Aslan, N. (2007). Application of response surface methodology and central composite rotatable design for modeling the influence of some operating variables of a Multi-Gravity separator for coal cleaning, Fuel, 86, 769-776.
- Chan, B.S.K., Mozley, R. and Childs G.J.C. (1991). Extended trials with the high tonnage multi gravity separator, Minerals Engineering, 4, 489-496
- Chan B.S.K., Mozley, R., ve Childs, J.C. (1994). Multi gravite ayırıcı, (Çev. E. Yüce), Madencilik, 33(1), 33-41.
- Chaurasia, R. C., Nikkam, S. (2017). Optimization Studies on a Multi-Gravity Separator Treating Ultrafine Coal. International Journal of Coal Preparation and Utilization, 37(4), 195-212.
- Çiçek. T., Cöcen, İ., Engin V.T. and Cengizler, H. (2008). An efficient process for recovery of fine coal from tailings of coal washing plants, Energy Sources, 30, 1716-1728.
- Koca, S., Aksoy, D. O., Cabuk, A., Celik, P. A., Sagol, E., Toptas, Y., Oluklulu S., Koca, H. (2017). Evaluation of combined lignite cleaning processes, flotation and microbial treatment, and its modelling by Box Behnken methodology. Fuel, 192, 178-186.
- Luthrell, G.H., Honaker R.Q. and Philips D.I. Enhanced gravity separators: new alternatives for fine coal cleaning, Proceedings of the 12th International Coal Preperation Conference, Lexington, 1992
- Ozdag, H., Ucbas, Y. and Koca, S. (1993). Enrichment of chromite ore by means of multi-gravity separator, Geosound, 23, 167-176.
- Oz Aksoy, D., Koca, S. and Koca, H., 2012, The effects of drum speed, shake frequency and shake amplitude combinations on cleaning of lignite fines by multi gravity separator, Proceedings of the XIII. International Mineral Processing Symposium, Bodrum, 2012
- Özbayoğlu, G., & Atalay, M. Ü. (2000). Beneficiation of bastnaesite by a multi-gravity separator. Journal of alloys and compounds, 303, 520-523.
- Roy, S. (2009) Recovery improvment of fine iron ore particles by multi gravity seperation, The Open Mineral Processing Journal, 2, 17-30.
- TMMOB MMO, Enerji ve Kömür Raporu, 2015.
- TKİ, 2015 Kömür (Linyit) Sektör Raporu, 2016.
- Veglio, F. and Belardi, G. (2000) Multivariate analysis supporting factorial experiments: a case study in the physical seperation of chromite fines by a multigravity separator, Seperation Science and Technology, 35(1), 109-132.
Abstract
Çalışmada düşük ranklı, yüksek kül ve kükürt
içerikli Çayırhan Bölgesi linyitlerinin fiziksel yöntemlerle
zenginleştirilebilirliği araştırılmıştır. Zenginleştirmede kullanılan MGS’nin tambur
hızı, frekans ve genlik parametrelerinin elde edilen temiz kömürün külü ve yanabilir
verimi üzerindeki etkileri irdelenmiştir. Çalışmada gerçekleştirilen deneyler
tam faktöriyel deney tasarımı ile planlanmış ve deneylerin sonuçları
istatistiksel olarak değerlendirilmiştir.
Çalışmanın
sonucunda, yaklaşık %75 kül içerikli kömüründen, külde yaklaşık %30 oranında
azalma ile %52,81 küllü konsantre, %61,65 yanabilir verim ile elde edilmiştir.
Sonuçların
istatistiksel analizi ile kül için yaklaşık 0.79, yanabilir verim için 0.98 R2
değerleri ile güçlü modeller elde edilmiştir. Ayrıca hem kül, hem yanabilir
verim için tambur hızının, cihazın ayırma etkinliğine en çok katkı sağlayan
parametre olduğu görülmüştür. Ancak genliğin, çalışılan seviyelerde ve %95
güven aralığında etkisinin istatistiksel olarak anlamsız olduğu sonucuna
ulaşılmıştır.
References
- Acıtaş, Ş. ve Şenoğlu B., İstatistiksel deney tasarımı: sabit etkili modeller, Nobel Yayın Dağıtım, Ankara, 2013.
- Aksoy, D. O., Aytar, P., Toptaş, Y., Çabuk, A., Koca, S., & Koca, H. (2014). Physical and physicochemical cleaning of lignite and the effect of cleaning on biodesulfurization. Fuel, 132, 158-164.
- Aslan, N. (2007). Application of response surface methodology and central composite rotatable design for modeling the influence of some operating variables of a Multi-Gravity separator for coal cleaning, Fuel, 86, 769-776.
- Chan, B.S.K., Mozley, R. and Childs G.J.C. (1991). Extended trials with the high tonnage multi gravity separator, Minerals Engineering, 4, 489-496
- Chan B.S.K., Mozley, R., ve Childs, J.C. (1994). Multi gravite ayırıcı, (Çev. E. Yüce), Madencilik, 33(1), 33-41.
- Chaurasia, R. C., Nikkam, S. (2017). Optimization Studies on a Multi-Gravity Separator Treating Ultrafine Coal. International Journal of Coal Preparation and Utilization, 37(4), 195-212.
- Çiçek. T., Cöcen, İ., Engin V.T. and Cengizler, H. (2008). An efficient process for recovery of fine coal from tailings of coal washing plants, Energy Sources, 30, 1716-1728.
- Koca, S., Aksoy, D. O., Cabuk, A., Celik, P. A., Sagol, E., Toptas, Y., Oluklulu S., Koca, H. (2017). Evaluation of combined lignite cleaning processes, flotation and microbial treatment, and its modelling by Box Behnken methodology. Fuel, 192, 178-186.
- Luthrell, G.H., Honaker R.Q. and Philips D.I. Enhanced gravity separators: new alternatives for fine coal cleaning, Proceedings of the 12th International Coal Preperation Conference, Lexington, 1992
- Ozdag, H., Ucbas, Y. and Koca, S. (1993). Enrichment of chromite ore by means of multi-gravity separator, Geosound, 23, 167-176.
- Oz Aksoy, D., Koca, S. and Koca, H., 2012, The effects of drum speed, shake frequency and shake amplitude combinations on cleaning of lignite fines by multi gravity separator, Proceedings of the XIII. International Mineral Processing Symposium, Bodrum, 2012
- Özbayoğlu, G., & Atalay, M. Ü. (2000). Beneficiation of bastnaesite by a multi-gravity separator. Journal of alloys and compounds, 303, 520-523.
- Roy, S. (2009) Recovery improvment of fine iron ore particles by multi gravity seperation, The Open Mineral Processing Journal, 2, 17-30.
- TMMOB MMO, Enerji ve Kömür Raporu, 2015.
- TKİ, 2015 Kömür (Linyit) Sektör Raporu, 2016.
- Veglio, F. and Belardi, G. (2000) Multivariate analysis supporting factorial experiments: a case study in the physical seperation of chromite fines by a multigravity separator, Seperation Science and Technology, 35(1), 109-132.
Details
| Primary Language | Turkish |
|---|---|
| Subjects | Geological Sciences and Engineering (Other) |
| Journal Section | Research Articles |
| Authors | |
| Publication Date | September 30, 2018 |
| Acceptance Date | October 9, 2018 |
| Published in Issue | Year 2018 |