Formation Mechanism of Soot in Zinc-Bearing Dusts Direct Reduction Process

Abstract:

The high-temperature tube furnace was applied to simulate the rotary hearth furnace (RHF) for the direct reduction of the zinc-bearing dusts from steel plants. The soot generated in the direct reduction process was studied by chromatography, X-ray diffraction (XRD), .and scanning electron microscopy (SEM) etc. The results suggested that the main phases of the soot were ZnO, KCl, NaCl and Zn5(OH)8Cl2H2O. Furthermore, the contents of Zn reach to 64.2% which could be used as secondary resources for zinc making. It is concluded that KCl and NaCl resulted from the volatilization from the briquettes at the experimental temperature of 1573K, while the ZnO were produced by the oxidation of the Zn vapor reduced from briquettes.

• Periodical: Advanced Materials Research (Volumes 156-157)
• Pages: 817-823
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.156-157.817
• Online since: October 2010
• Authors: Xue Feng She, Qing Guo Xue, Hui Xian Yang, Yin Gui Ding
• Keywords: Direct Reduction, Rotary Hearth Furnace, Utilization of Resource, Zinc-Bearing Dust

References

[1] B. Das, S. Prakash, P. S. R. Reddy and V. N. Misra: Resour. Conserv. Recycl., Vol. 50 (2007), p.40. (In Chinese).

[2] X. W. Zhang, H. Q. Liao and X.J. Bao: Metall. Envir. Eng., Vol. 40(2007), p.32. (In Chinese).

[3] C. A. Pickles: Sep. Purif. Technol., Vol. 59 (2008), p.115.

[4] J. L. Zhang, Y. F. Yan, M. Xu: J. Iron & Steel, Vol. 41(2006), p.78. (In Chinese).

[5] S. K. Wei: Metallurgical Process Thermodynamics(Shanghai Science and Technology Press, Shanghai 1980).

[6] Q. C. Wei: Metallurgical Thermodynamics(Chongqing University Press, Chongqing 1996). (In Chinese).

[7] Q. Z. Du, J. H. Yang: Physical Chemistry(Chongqing University Press, Chongqing 1997). (In Chinese).

[8] O. libraries Charlene Barshefsky: Metallurgical Thermochemistry (Metallurgical Industry Press, Beijing 1985).

[9] Y. Qu: Principles of Steelmaking(Metallurgical Industry Press, Beijing 1980). (In Chinese).

[10] R. H. She, G. Q. Zhang and M. Dell'Amico: ISIJ. Int., Vol. 46(2006), p.8.

[11] R. H. She, G. Q. Zhang and M. Dell'Amico: ISIJ. Int., Vol. 45(2005), p.1248.

[12] S. C. Chen, L. Z. Zhou and J. Y. Zou: Guangdong J. Nonferrous Metals, Vol. 1(1991), p.27. (In Chinese).

[13] C. D. Xu, R. Lin, D. C. Wang: Zinc Metallurgy Physical Chemistry(Shanghai Science and Technology Press, Shanghai 1979). (In Chinese).

[14] F. M. Meng, W. Z. Wang and Y. Junichiro: J. Iron & Steel, Vol. 43(2008), p.91. (In Chinese).

[15] Z. X. Qiu, J. Z. Xu: Metallurgy(Northeastern University Press, Shenyang 2001). (In Chinese).

[16] D. Y. Wang: Steel plant equipped with carbon-zinc pellets of lead dust reduction treatment process and process kinetics (University of Science and Technology Beijing, Beijing 1995) . (In Chinese).

[17] Z. X. Qiu: Non-ferrous Metallurgy(Metallurgical Industry Press, Beijing 1988) . (In Chinese).

[18] C. M. Mario, T. Cyro: ISIJ. Int., Vol. 40(2000), p.224.

[19] H. F. Li: Research on the disposal of the dust in the process of Rotary Hearth Furnace(University of Science and Technology Beijing, Beijing 2008). (In Chinese).

[20] J. Y. Mu: The alkaline metal in the smelting process of Blast furnace(Metallurgical Industry Press, Beijing 1992) . (In Chinese).