EJONS INTERNATIONAL JOURNAL ON MATHEMATICS, ENGINEERING & NATURAL SCIENCES ISSN 2602 - 4136

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Summary


MICROWAVE ACTIVATED DESULFURIZATION OF TURKISH COALS AND LIGNITE, ŞIRNAK ASPHALTITE –MODIFIED PNEUMATIC FLOTATION

Clean coal products of Tunçbilek, Bolu Mengen, KütahyaGediz lignite, Sirnak asphaltite were received as mid-products and shale settlements in modified centrifuge settler in the column form. The cleaner products was also second cleaning stage was also carried out. Heavy duty washing was applied in two and three stages ranging 1.5 to 1.7 gr/cm3 densities of ZnCl2 baths in order to determine and compare with centrifuge settler performance and cleaning efficiencies of coagulation and settling. The modified settler design for the optimum washing unit and the most advanced clean product was investigated. With the advanced design, the best quality lignite is obtained by producing the cleanest product that the country needs as desulfurization. The coal types can change the method of coagulation cleaning of the coal and asphaltite in the local area of Şırnak. The country side may use much simple methods using water settling and during settling coagulation of asphaltite fines as clean desulfurized products. This method could be successful in high product yield for mid products and pyrite rejection following Humphrey spirals. The combustion yields for Şırnak asphaltite fine under 100 micron was over 73% and 60% with 23% ash and 22% ash contents in the first and last cleaning stage end, respectively. The coal samples desulfurization at third cleaning stages was reached 59,5% for Şırnak asphaltite fine while the desulfurization rate values was 43,6% in control tests of selective coagulation tests. The production of high quality solid coal fuels will lead to the development of the South East Anatolian region and will further improve the industrial development with the diversification and supply of industrial energy fuels. Şırnak asphaltite and lignite with various washing devices could be cleaned from ash clay. The washing of lignite and forward washing stages and optimum parameters were determined and the efficiency was high. Performance for current process should be subsequently practiced for mid heavy media products and low qualities of our lignite. Tests and their performance in advanced processing could provide the modification for settler and it also needs to be developed depending on type of lignite.



Keywords
slime washing, sellective coagulation, modified settler, cleaning coal, desulfurization, washing asphaltite

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