Abstract
Realizing the boron and iron separation through selective reduction and melting separation of boron-bearing iron concentrate is of great significance for the utilization of crude ludwigite. The reduction and melting separation mechanism of boron-bearing iron concentrate/coal composite pellet was systematically investigated. The reduction and melting separation test of small size pellet was performed to reveal the evolution of slag and iron in the melting separation process. The isothermal reduction experiment showed the relationship between reduction stage and melting separation stage, and the step reduction and melting separation was perfectly achieved. Coal particles existed through the reduction and melting separation process and finally formed brown residue around the separated product. The pellet could not realize melting separation when the B2O3 content in the concentrate was lower than 6.00 wt%.
Similar content being viewed by others
References
X.J. Zheng, Borax, Boric Acid and Boric Fertilizer Production Technology, Chemical Industry Press, Beijing, 2013.
X.P. Zhang, J.F. Lang, C.M. Cui, S.L. Liu, Iron and Steel 30 (1995) No. 12, 9–11.
Z.T. Sui, P.X. Zhang, C. Yamauchi, Acta Mater. 47 (1999) 1337−1344.
S.L. Liu, C.M. Cui, P.X. Zhang, ISIJ Int. 38 (1998) 1077–1079.
Q.J. Zhao, F.M. Meng, Z.B. Ma, Journal of Northeast University of Technology 12 (1991) 464–450.
K.H. Bauer, D. Huette, H.J. Lehmkuehler, H. Schmauch, Metall. Plant Technol. 13 (1990) No. 4, 74–87.
J.M. McClelland, G.E. Metius, JOM 55 (2003) No. 8, 30–34.
R. Munnix, J. Borlee, D. Steyls, M. Economopoulos, Metall. Plant Technol. 20 (1997) No. 2, 50–52.
Y. Sawa, T. Yamamoto, K. Takeda, H. Itaya, ISIJ Int. 41 (2001) S17–S21.
B. Anameric, S.K. Kawatra, Miner. Metall. Proc. 33 (2006) 52–56.
G. Wang, J.S. Wang, Y.G. Ding, S. Ma, Q.G. Xue, ISIJ Int. 52 (2012) 45–51.
Y.G. Ding, J.S. Wang, G. Wang, S. Ma, Q.G. Xue, J. Iron Steel Res. Int. 19 (2012) No. 6, 9–13.
G. Wang, Y.G. Ding, J.S. Wang, X.F. She, Q.G. Xue, Int. J. Miner. Metall. Mater. 20 (2013) 522–528.
G. Wang, Q.G. Xue, X.F. She, J.S. Wang, Int. J. Miner. Metall. Mater. 22 (2015) 926–932.
G. Wang, Q.G. Xue, J.S. Wang, Trans. Nonferrous Met. Soc. China 26 (2016) 282–293.
G. Wang, Q.G. Xue, X.F. She,J.G. Wang, ISIJ Int. 55 (2015) 751–757.
G. Wang, Q.G. Xue, J.S. Wang, Ironmak. Steelmak. 43 (2016) 153–162.
G. Wang, Q.G. Xue, J.S. Wang, Thermochim. Acta 621 (2015) 90–98.
H.S. Kim, J.G. Kim, Y. Sasaki, ISIJ Int. 50 (2010) 1099–1106.
G. Wang, J.S. Wang, X.Y. Yu, Y.F. Shen, Q.G. Xue, Int. J. Miner. Metall. Mater. 23 (2016) 247–256.
X.L. Liu, S.L. Wu, W. Huang, K.F. Zhang, K.P. Du, ISIJ Int. 54 (2014) 2089–2096.
Acknowledgements
The authors would like to express their gratitude for the financial support of the China Postdoctoral Science Foundation (No. 2016M600919) and National Natural Science Foundation of China (No. 51274033).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wang, G., Xue, Qg. & Wang, Js. Reduction and melting separation mechanism of boron-bearing iron concentrate/coal composite pellet. J. Iron Steel Res. Int. 25, 310–319 (2018). https://doi.org/10.1007/s42243-018-0034-2
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s42243-018-0034-2