Experimental Study on Direct Reduction of Nb-Bearing Iron Concentrate in Cylinder Reaction

Zeng Wu Zhao; Bao Wei Li; Ming Wen; Yong Li Jin; Fu Shun Zhang

doi:10.4028/www.scientific.net/AMR.146-147.904

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 146-147Experimental Study on Direct Reduction of...

Experimental Study on Direct Reduction of Nb-Bearing Iron Concentrate in Cylinder Reaction

Abstract:

In order to further improve utilization efficiency of Bayan obo Fe-Nb-RE complex deposit, selective reduction of Nb-bearing iron concentrate was achieved by using a reduction processes in reaction cylinder which is heated in tunnel kiln. The experiments were focused on investigating effects of reduction temperature and time on the reduction dynamics of Nb-bearing iron concentrate. The results show that the temperature at the centre of reaction cylinder is lower than its peripheral temperature. The local metallization ratio of the produced sponge iron ring varies from high, to low and to high level along its radius direction. With reduction temperature increasing, the metallization ratio of produced sponge iron is proportionally increasing, and the outer diameter of the sponge iron ring is gradually decreasing. The metallization ratio of the produced sponge iron is gradually increasing with the increase of reduction time.

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Periodical:

Advanced Materials Research (Volumes 146-147)

Pages:

904-910

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.146-147.904

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Online since:

October 2010

Authors:

Zeng Wu Zhao, Bao Wei Li, Ming Wen, Yong Li Jin, Fu Shun Zhang

Keywords:

Direct Reduction, Experiment, Iron Concentrate, Niobium, Reaction Cylinder

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