Advertisement

JOM

, Volume 70, Issue 12, pp 2825–2836 | Cite as

Issues Relevant to Recycling of Stainless-Steel Pickling Sludge

  • Zhao Junxue
  • Zhao Zhongyu
  • Shi Ruimeng
  • Li Xiaoming
  • Cui Yaru
Solution Purification Technology
  • 49 Downloads

Abstract

Stainless-steel pickling sludge is a hazardous solid waste. Harmless treatment and recycling of this sludge are major research topics. Based on the sludge formation process, two typical types of stainless-steel pickling sludge were chosen and their physiochemical properties determined by chemical analysis, differential thermal analysis/thermogravimetry, and x-ray diffraction analysis. Possible approaches to recycle the sludge were suggested, and relevant problems are discussed. Based on its high water and sulfur contents, as well as the valuable metals that could be recovered from sludge, drying, roasting, and reduction tests were carried out. It was found that Fe and Cr were mainly present in oxides, Ca in Ca(OH)2 and CaF2, and sulfur in CaSO4. Natural drying was a very slow process, but forced drying at temperatures above 423 K was effective. Sulfur could be partly removed from sludge through roasting and reduction at high temperatures, with most of the sulfur being transferred to gas and slag in the reduction process; however, this treatment did not allow sludge with high sulfur content to be used as a suitable raw material in terms of sulfur level requirements. It is suggested that prepickling and pickling waste liquors should be treated to reduce output of high-sulfur sludge to promote sludge recycling. Optimized reduction conditions were identified in terms of additional carbon content (1.3 times as suggested by theoretical data) and temperature (above 1673 K) for high metal recovery.

Notes

Acknowledgements

Part of the work was performed at IME, RWTH Aachen University, Germany, who we thank for their help. We also thank the Natural Science Foundation of China (Nos. 51674185, 51574189, and 51674186).

Supplementary material

11837_2018_3168_MOESM1_ESM.pdf (471 kb)
Supplementary material 1 (PDF 471 kb)

References

  1. 1.
    C.J. Brown and P. Eng, CISA Int. Steel Congr. 8, 158 (2002).Google Scholar
  2. 2.
    M. Ito, M. Yoshioka, and Y. Seino, ISIJ Int. 37, 391 (1997).CrossRefGoogle Scholar
  3. 3.
    J. Nolasco Sobrinhop, C.R. Espinosad, and A.S. Tenorioj, Ironmak. Steelmak. 30, 1 (2003).CrossRefGoogle Scholar
  4. 4.
    P. Ma, B. Lindblom, and B. Björkman, Scand. J. Metall. 34, 31 (2005).CrossRefGoogle Scholar
  5. 5.
    F. Baerhold, J. Starcivic, and K. Reichert, Millenn. Steel, 238 (2006).Google Scholar
  6. 6.
    G. Ye, E. Burström, and M. Kuhn, Scand. J. Metall. 32, 7 (2003).CrossRefGoogle Scholar
  7. 7.
    Q. Yang and N. Holmberg, Electric Furnace Conference Proceedings (2000).Google Scholar
  8. 8.
    N. Yoshikawa, E. Ishizuka, K.I. Mashiko, and S. Taniguchi, Mater. Lett. 61, 2096 (2007).CrossRefGoogle Scholar
  9. 9.
    G. Su, M. Huo, and C. Wang, Civil Eng. Environ. Eng. 35, 140 (2013).Google Scholar
  10. 10.
    J. Zhao, X. Li, Y. Zeng, and H. Ma, Mater. Sci. Forum 620–622, 603 (2009).Google Scholar
  11. 11.
    K. Hori, A. Iwama, and T. Fukuda, Propellants, Explos., Pyrotech. 15, 99 (2010).CrossRefGoogle Scholar
  12. 12.
    S. Stopic, in 7th EMC European Metallurgical Conference, Vojnotehnički Glasnik, 2013.Google Scholar
  13. 13.
    A. López-Delgado and F.A. López, Mater. Res. 14, 3427 (1999).CrossRefGoogle Scholar
  14. 14.
    X. Li, W. Yang, and W. Li, et al., Chin. J. Process Eng. 13, 1003 (2013).Google Scholar
  15. 15.
    A. Singhal, V.K. Tewari, and S. Prakash, Build. Environ. 43, 1010 (2008).CrossRefGoogle Scholar
  16. 16.
    A.G. Guézennec, J.C. Huber, and F. Patisson, Powder Technol. 157, 2 (2007).Google Scholar
  17. 17.
    P. Ma, B. Lindblom, and B. Björkman, Scand. J. Metall. 34, 31 (2005).CrossRefGoogle Scholar
  18. 18.
    B. Lindblom, C. Samuelsson, Å. Sandström, and G. Ye, JOM 54, 35 (2002).CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.School of Metallurgical EngineeringXi’an University of Architecture and TechnologyXi’anPeople’s Republic of China

Personalised recommendations