Utilization of coal sludge as reductant in the direct reduction of titanomagnetite ore

DOI

10.2991/iceep-16.2016.67How to use a DOI?

Keywords

coal sludge; direct reduction; titanomagnetite; desulfurization

Abstract

Coal-based direct reduction followed by magnetic separation was used to produce direct reduction iron powder (DRIP) from a titanomagnetite (TTM) ore. The residual solid wastes which are called coal sludge in this paper are still discarded as waste in large quantities. To explore the feasibility of using coal sludge as reductant, two types of coal sludge, namely, TJ and SX, with different dosages were investigated. Results showed that this process can realize coal-sludge utilization, and good DRIP products were obtained. The suitable dosage of coal sludge depended on the fixed carbon content of coal sludge. TJ and SX presented a similar result in reducing the TTM ore, i.e., TTM ore was reduced to iron, ilmenite, and ferrous pseudobrookite by both TJ and SX; improved Fe recovery in DRIP was further achieved by increasing the dosages of the two coal sludge, but the increased dosage was unfavorable to Fe grade and TiO2 content. The sulfur contained in coal sludge occurred in the form of troilite in the reduced ore. Because troilite is a nonmagnetic material, it was removed into tailings after magnetic separation. Thus, the process presented a good ability of desulfurization.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chao Geng
AU  - Tichang Sun
AU  - Huifeng Yang
PY  - 2016/11
DA  - 2016/11
TI  - Utilization of coal sludge as reductant in the direct reduction of titanomagnetite ore
BT  - Proceedings of the 2016 5th International Conference on Energy and Environmental Protection (ICEEP 2016)
PB  - Atlantis Press
SP  - 385
EP  - 390
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceep-16.2016.67
DO  - 10.2991/iceep-16.2016.67
ID  - Geng2016/11
ER  -