2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 2: Gudenau Intl. Symp. / Iron and Steel Making

Editors:	Kongoli F, Kleinschmidt G, Pook H, Ohno K, Wu K
Publisher:	Flogen Star OUTREACH
Publication Year:	2015
Pages:	340 pages
ISBN:	978-1-987820-25-6
ISSN:	2291-1227 (Metals and Materials Processing in a Clean Environment Series)

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Pre-Combustion Removal of Ash Minerals from PCI Coal by Tribo-Electrostatic Separation

Chong-Lyuck Park¹; Minsoo Shin²; Young-Cheol Yang³;
¹POSCO, Keumho-dong, Kwangyang-si, Korea (Republic of [South] Korea); ²POSCO, Kwangyang-si, Korea (Republic of [South] Korea); ³POSCO, Pohang-si, Korea (Republic of [South] Korea);
Type of Paper: Regular
Id Paper: 222
Topic: 2

Abstract:

Combustion efficiency should be sharply reduced under higher PCR condition than a certain ratio because ash in PCI coal raises problem like as incomplete combustion in race way. Therefore, an ash removal of coal is needed for high PCR operation in order to secure cost competitiveness and minimize a production cost of pig iron. Coal for PCI in BF is pulverized under -76um of particle size and under 1 wt% of moisture content. Most of ash minerals and carbon in the pulverized coal could be liberated, and it means that the liberated ash can be separated from coal particle. Stirred ball charger and three-stage tribo-electrostatic separator were used to remove the ash. Carbon particles have a positive charge and ash minerals have a negative charge by the stirred ball charger using PVC ball. The charged carbon and ash can be easily separated by the three-stage electrostatic separator. The ash can be removed up to 30% and the carbon recovery is up to 83% under the optimum separation condition.

Keywords:

Blast; Carbon; Combustion; Energy; Furnace;


References:

[1] K. H. Peters, W. Kowalski, B. Korthas and K. Kreibish: Proceedings of the 48th Ironmaking Conference, AIME, Chicago, 1989, 819.
[2] F. Graffeuille, B. Allaire, and D. Lao: Proceedings of the 44th Ironmaking conference, AIME, Detroit, 1985, 449.
[3] T. Maki, Y. Matsui, R. Ono, T. Goto, R. Hori, and K. Kuwano: CAMP-ISIJ, 3 (1990), 1015.
[4] Ross PJ, Taguchi techniques for quality engineering, 1988, McGraw Hill.
[5] Tahuchi G, Introduction to quality engineering, 1986, Asian productivity organization.

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Cite this article as:

Park C, Shin M, Yang Y. Pre-Combustion Removal of Ash Minerals from PCI Coal by Tribo-Electrostatic Separation. In: Kongoli F, Kleinschmidt G, Pook H, Ohno K, Wu K, editors. Sustainable Industrial Processing Summit SIPS 2015 Volume 2: Gudenau Intl. Symp. / Iron and Steel Making. Volume 2. Montreal(Canada): FLOGEN Star Outreach. 2015. p. 315-322.