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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© 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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