A New Method of Acid Regeneration in Steel Pickling Plants: The Case Study of Kashan Amirkabir Steel Company

Author

Abstract

One of the common methods of removing iron oxide from the surface of hot rolled steel sheets is to wash the sheet with acid. The most common acid used in steel industry for this purpose is hydrochloric acid. One of the methods of recycling hydrochloric acid from acid leaching effluent used in steel industry is acid recycling method using fluidized bed reactor. To this end, the effect of this method on the reduction of g environmental challenges, an optimal use of energy, and an increase in efficiency and productivity in steel industry was investigated. In this research, the solvent extraction method as well as evaporation and crystallization method for acid recycling was proposed. The results showed that the solvent extraction method has low efficiency, requires strict system control as well as continuous monitoring; however, the evaporation and crystallization method with the least man power, energy consumption environmental pollution as well as with high efficiency has an acceptable preference. In the evaporation and crystallization method, 17.5% hydrochloric acid solution and iron chloride are recycled; such event has many uses and can be sold. The water from the evaporation and crystallization process can also be used as a product in the factory or used to irrigate the green space in the factory.

Keywords

References

[1] Dufour, J., Negro, C., Galvez, J.L. and Lopez-Mateos, F., "Overall recovery of stainless-steel pickling liquors", In: Macias-Machin, A., Umbria, J. (Eds.), Chemical Industry and Environment IV, Universidad de Las Palmas de Gran Canaria, Vol. 1, pp. 219-228, 2003. [2] Ferreiraa, A.S. and Mansurb, M.B., "Statistical analysis of the spray roasting operation for the production of high quality Fe2O3 from steel pickling liquors", Process Saf. Environ. Prot. Vol. 89, pp. 172-178. 2011. [3] Forsberg, K.M. and Rasmuson, Å.C., "Recycling of waste pickle acid by precipitation of metal fluoride hydrates", Miner. Eng. Vol 20, pp. 950-955. 2007. [4] Harscoet, E. and Froelich, D., "Use of LCA to evaluate the environmental benefits of substituting chromic acid anodizing (CAA)", J. Clean. Prod. Vol. 16, pp. 1294-1305. 2008. [5] Liu, N.W. and Chou, M.S., "Reduction of secondary aluminum dross by a waste pickling liquor containing ferrous chloride", Sustain, Environ. Res. Vol. 23, No. 1, pp. 61-67. 2003. [6] Agrawal, A. and Sahu, K.K., "An overview of the recovery of acid from spent acidic solutions from steel and electroplating industries", J. Hazard. Mater. Vol. 171, pp. 61-75. 2009. [7] Regel-Rosacka, M., "A review on method of regeneration of spent pickling solutions from steel processing", J. Hazard. Mater. Vol. 177, pp. 57-69. 2010. [8] Sinha, M.K., Sahu, S.K., Meshram, P. and Pandey, B.P., "Solvent extraction and separation of zinc and iron from spent pickle liquor", Hydrometallurgy 147e148, pp. 103-111. 2014. [9] Rogener, F., Sartor, M., B_an, A., Buchloh, D. and Reichardt, T., "Metal recovery from spent stainless steel pickling solution", Resour. Conserv. Recycl. Vol.60, pp. 72-77. 2012. [10] Tomaszewska, M., Gryta, M., Morawski, A.W., "Study on the concentration of acids by membrane distillation", Journal of Membrane Science, Vol.102, pp. 113-122. 1995. [11] Csicsovszki, G., Kekesi, T. and Torok, T.I., "Selective recovery of Zn and Fe from spent pickling solutions by the combination of anion exchange and membrane electrowinning techniques", Hydrometallurgy Vol.77, pp. 19-28, 2005. [12] Sengupta, A.K., "Ion Exchange and Solvent Extraction: a Series of Advances", 18. CRC Press, New York. 2007. [13] Dahlgren, L., "Treatment of Spent Pickling Acid from Stainless Steel Production: A Review of Regeneration Technologies with Focus on the Neutralization Process for Implementation in Chinese Industry", (Master of science thesis). 2010.
Energy Engineering and Management
Volume 12, Issue 2
August 2022
Pages 64-71

Files

Share

How to cite

Statistics