Abstract
Hitherto, the iron content after cold-rolling sludge dehydration in iron and steel enterprises has reached up to 60%. However, it contains a lot of chlorine, which is the source of dioxins. And the presence of chlorine makes the cold-rolling sludge possess highly corrosivity, causing great trouble in the reproduction process. Therefore, dechlorinating experiments on cold-rolling sludge are of great significance. In this paper, we proposed an efficient way to dechlorinate the cold-rolling sludge by using high-temperature roasting method. XRD, SEM and other analytical methods were carried out to characterize the sludge. For comparison, the samples were heated from 200 to 500 °C for 2 h under air atmosphere. The dechlorinating efficiency reaches a very high value of 99%, and the main phase of final product is Fe2O3. In addition, we analysed the reaction mechanism and clarified the removal form of chlorine in the roasting process. These findings open up a promising avenue for steel enterprises to deal with cold-rolling sludge .
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References
Anderson DR, Fisher R (2002) Sources of dioxins in the United Kingdom: the steel industry and other sources. Chemosphere 46(3):371–381
Addink RF, Espourteille Altwicker ER (1998) Role of inorganic chlorine in the formation of polychlorinated dibenzo-p-dioxins/dibenzofurans from residual carbon on incinerator fly ash. Environ Sci Technol 32(21):3356–3359
Wang L (2007) Recycling use of dust and chromium containing sludge from stainless steel-maker. Masters thesis, Xi’an University of Architecture and Technology
Hu S, Chen RH, Wang RY (2012) Study on metallurgical properties and pellet proportioning technology of stainless steel cold-rolling sludge. Baosteel Technol 6(2):21–26
Fu YK, Tang XS (2012) Chlorine balance in blast furnace and chlorine distribution in gas pipeline. J. of Anhui Univ Technol (Nat Sci) 29(3):198–201
Liu XJ, Lu Q, Zhang SH (2012) Migration principle of chlorine in BF production. Adv Mater Res 402:107–110
Zhang W et al (2015) Harm of chlorine in blast furnace and analysis on its reaction behavior. Angang Technol 6:6–10
Li XY, Hu JK (2014) Determination of high content chlorine in copper concentrates by automatic potentiometric titration. Chinese J Anal Chem 4:11–13
Tang XM, Dai WZ (1993) FeCl2·4H2O kinetics of roasting process. J Chem Ind Eng 44:19–25
Wang L (2017) Research on fluidized calcination process of FeCl2·4H2O and its Kinetics. Masters thesis, Zhejiang University of Technology
Elliott AC (1970) Effluent Water Treat J 10:385–390
Mellor JW (1935) A comprehensive treatise on inorganic and theoretical chemistry, vol 14. Longmans Green and Co., London, pp 20–21
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© 2019 The Minerals, Metals & Materials Society
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Li, Y., Cheng, H., Li, G., Mei, X., Lu, X., Xu, Q. (2019). Experimental Study on Dechlorination of Cold-Rolling Sludge at High-Temperature Roasting. In: Jiang, T., et al. 10th International Symposium on High-Temperature Metallurgical Processing. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05955-2_62
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DOI: https://doi.org/10.1007/978-3-030-05955-2_62
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