[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.7464/ksct.2015.21.2.096

Experimental Study on Hydrogen Direct Reduction of Hematite in a Lab Scale Fluidized Bed Reactor by Estimating the Gas Consumption Rate

Hasolli, Naim (Clean Fuel Department, Korea Institute of Energy Research)
Jeon, Seong Min (Clean Fuel Department, Korea Institute of Energy Research)
Park, Young Ok (Clean Fuel Department, Korea Institute of Energy Research)
Kim, Yong Ha (Department of Chemical Engineering, Pukyong National University)

Publication Information

Clean Technology / v.21, no.2, 2015 , pp. 96-101 More about this Journal

Abstract

Hematite reduction using hydrogen was conducted and the various process parameters were closely observed. A lab scale fluidized bed unit was designed especially for this study. The optimal values of the gas velocity, reduction time and temperature were evaluated. The values which indicated the highest reduction rate were set as fixed parameters for the following tests starting with the reduction time of 30 minutes and 750 ℃ of temperature. Among these variables the one with the highest interest was the gas specific consumption. It will tell the amount of the gas which is required to achieve a reduction rate of over 90% at the optimal conditions. This parameter is important for the scale up of the lab scale unit. 1,500 Nm³/ton-ore was found to be the optimal specific gas consumption rate at which the reduction rates exhibit the highest values for hematite.

Keywords

Hydrogen reduction; Iron ore; Hematite particles; Fluidized bed; Reducibility;

Citations & Related Records

Reference

1	Pang, J. M., Guo, P. M., Zhao, P., Cao, C. Z., Zhao, D. G., and Wang, D. G., "Reduction of 1-3 mm Iron ore by H 2 in a Fluidized Bed," Int. J. Minerals, Metallurgy and Mater., 16(6), 620-625 (2009). DOI
2	Zhu, Q., Wu, R., and Li, H., "Direct Reduction of Hematite Powders in A Fluidized Bed Reactor," Particuol., 11(3), 294-300 (2013). DOI
3	Chatterjee, A. Sponge Iron Production by Direct Reduction of Iron Oxide. PHI Learning Pvt. Ltd., 2010.
4	Turkdogan, E. T., and Vinters, J. V., "Gaseous Reduction of Iron Oxides: Part I. Reduction of Hematite in Hydrogen," Metallurg. Mater. Trans. B, 2(11), 3175-3188 (1971). DOI
5	Turkdogan, E. T., Olsson, R. G., and Vinters, J. V., "Gaseous Reduction of Iron Oxides: Part II. Pore Characteristics of Iron Reduced from Hematite in Hydrogen," Metallurg. Mater. Trans. B, 2(11), 3189-3196 (1971). DOI
6	Turkdogan, E. T., and Vinters, J. V., "Gaseous Reduction of Iron Oxides: Part III. Reduction-oxidation of Porous and Dense Iron Oxides and Iron," Metallurgical Trans., 3(6), 1561-1574 (1972). DOI
7	Da Costa, A. R., Wagner, D., and Patisson, F., "Modelling a New, Low CO₂ Emissions, Hydrogen Steelmaking Process," J. Cleaner Production, 46, 27-35 (2013). DOI ScienceOn
8	Feilmayr, C., Thurnhofer, A., Winter, F., Mali, H., and Schenk, J., "Reduction Behavior of Hematite to Magnetite under Fluidized Bed Conditions," ISIJ Int., 44(7), 1125-1133 (2004). DOI
9	KS E ISO2597-1:2007, Determination of Total Iron Content, Part 1 -- Titrimetric Method after Tin (II) Chloride Reduction (2007).