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Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/773

Title: CHARACTERISTICS OF INDIAN NON-COKING COALS AND IRON ORE REDUCTION BY THEIR CHARS FOR DIRECTLY REDUCED IRON PRODUCTION
Authors: Kumar, M
Patel, S K
Keywords: ash fusion temperatures
caking index
coals and chars
composition
iron ore
reactivity
Issue Date: 2008
Publisher: Taylor and Francis
Citation: Mineral Processing and Extractive Metallurgy Review, Vol 29, Iss 3 , P 258 - 273
Abstract: Studies on chemical and physical properties ( proximate analysis, sulphur content, reactivity, iron ore reduction potential, caking index and ash fusion temperatures) of coals, procured from sixteen different mines of Orissa, were undertaken for their judicial selection in Indian sponge iron plants. These coals were found to have low sulphur (range : 0.40 – 0.66 %) and moderate to high ash (range : 22 – 53 %) contents. The results indicated no caking characteristic in all the coals except Basundhara. Majority of the studied coal ashes were found to have higher fusion temperatures (ST: 1349 – 15470C; HT: 1500 – 16630C; and FT: 1510 – 17010C). An increase in fixed carbon content in the coal char, in general, led to decrease in its reactivity towards CO2, and majority of the chars exhibited significantly higher reactivities (> 4.0 cc of CO/g.sec). Further reduction studies in coal chars at 9000C indicated an increase in the degree of reduction of fired hematite iron ore pellets with inc...
Description: Copyright for the published paper belongs to Taylor and Francis
URI: http://dx.doi.org/10.1080/08827500801997902
http://hdl.handle.net/2080/773
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