Ghosh, Arpita and Das, T K and Nayak, B and Palit Sagar, S (2013) A non-invasive technique for sorting of alumina-rich iron ores. Minerals Engineering, 45(55–58) (IF-1.207). pp. 55-58.
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This paper describes an Infrared (IR) thermography based technique for sorting of iron ores consisting of alumina-rich particles of relatively low thermal absorptivity as compared to iron-rich particles in the ores. The technique primarily consists of selection of iron ores with Fe compositions ranging from 59 to 69 wt.% and alumina (Al 2 O 3 ) from 0.35 to 8.85 wt.%, crushing the ores up to the particle size range around 10 mm. The iron ore ﬁnes are uniformly heated using heat source of wavelength ranging from 10 2 to 10 6 m for a period of time sufﬁcient to create a difference in infrared emission between the ore particles. The thermal image of the heated ores is captured by IR thermography. The alumina-rich iron ore particles are heated up less as the thermal absorptivity of these ores is less than the ores with high iron content. Thus, the alumina-rich iron ore particles can be identiﬁed by observing the temperature proﬁle and/or thermal image of these ores. This technique of ore recognition can be useful in improving the feed quality of iron ore to the blast furnace in iron and steel industries by rejecting the alumina-rich ores through modiﬁcation in the presently existing processes.
|Uncontrolled Keywords:||IR thermography,Iron ore,Beneﬁciation,Ore sorting, Thermal absorptivity|
|Divisions:||Material Science and Technology|
|Deposited By:||Dr. S Palit Sagar|
|Deposited On:||13 Mar 2013 12:23|
|Last Modified:||12 Aug 2013 12:47|
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