Abstract
Attention focuses here on methods of coal processing that require minimal quantities of water and yield products that may be effectively used as commercial and secondary raw materials. In the heat treatment of coals associated with semicoking, the accompanying physicochemical transformation of the coal significantly affects its potential for further processing. In semicoking, the filtration system within the coal pieces changes. The initial coal sample contains phytopores of equivalent diameter d e up to 0.22 μm. More than 54% of these are pores smaller than 10 μm, mainly (65%) of slot and disk form. A small proportion (10%) of supercapillary cavities (d e > 0.1 μm) is also observed. After heat treatment, the content of small pores is sharply reduced to 10% (450°C semicoke) and 6.6% (550°C semicoke)–that is, almost sixfold–while the content of supercapillary cavities is increased approximately fourfold (in 550°C semicoke).
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References
Chanturiya, V.A., Vaisberg, L.A., and Kozlov, A.P., Promising trends in investigations aimed at utilization of mineral raw materials, Obogashch. Rud, 2014, no. 2, pp. 2–8.
Shkoller, M.B., D’yakov, S.I., and Subbotin, S.P., Sovremennye energotekhnologicheskie protsessy glubokoi pererabotki tverdykh topliv (Deep Processing of Solid Fuels), Kemerovo: Kuzbassvuzizdat, 2012.
Bratton, R., Luttrell, G., and Kasindorf, H.G., Evaluation of a novel fine coal dry cleaning process at Greenfields Coal Company, Int. J. Coal Prep. Util., 2010, no. 30, pp. 145–153.
Arsent’ev, V.A., Vaisberg, L.A., and Ustinov, I.D., Trends in development of less water intensive technologies for enrichment of fine-grained raw materials, Obogashch. Rud, 2014, no. 5, pp. 3–9.
Islamov, S.R., Processing low-rank coals into highcaloric fuel, Ugol’, 2012, no. 3, pp. 64–66.
Islamov, S.R. and Mikhalev, I.O., Power-engineering use of coal based on the process of layered gasification of Termokoks-S, Prom. Energ., no. 10, pp. 2–4.
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Original Russian Text © A.M. Gerasimov, A.A. Abrosimov, Yu.G. Pimenov, V.M. Strakhov, 2016, published in Koks i Khimiya, 2016, No. 6, pp. 2–8.
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Gerasimov, A.M., Abrosimov, A.A., Pimenov, Y.G. et al. Change in composition and porous structure of coal on thermal conditioning. Coke Chem. 59, 207–212 (2016). https://doi.org/10.3103/S1068364X1606003X
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DOI: https://doi.org/10.3103/S1068364X1606003X