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Journal of Iron and Steel Research International

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19-07-2018 | Original Paper

Desulfurization thermodynamics experiment of stainless steel pickling sludge

Authors: Xiao-ming Li, Ming Lv, Wei-dong Yin, Jun-xue Zhao, Ya-ru Cui

Published in: Journal of Iron and Steel Research International | Issue 5/2019

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Abstract

A technical idea of returning stainless steel pickling sludge to smelting process so as to recycle valuable metals of Fe, Cr, and Ni was proposed, expecting to realize sludge detoxification and resource utilization. Thermodynamics calculation showed that not only most valuable elements including Fe, Cr and Ni, but also the harmful element of sulfur in pickling sludge can be enriched into molten metal. As a result, a theoretical study on desulfurization thermodynamics of sludge pre-treatment was conducted, and results indicated that complete desulfurization temperature of pure pickling sludge was above 1400 °C. When 0.5–0.8% carbon was added as reducing agent, the complete desulfurization temperature was reduced to 1000 °C or below. Desulfurization roasting experiment indicated that desulfurization rate at 1400 °C under inert environment was 78.74% and maximum desulfurization rate at 1000 °C under reducing environment was 91.62%.

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Title: Desulfurization thermodynamics experiment of stainless steel pickling sludge
Authors: Xiao-ming Li
Ming Lv
Wei-dong Yin
Jun-xue Zhao
Ya-ru Cui
Publication date: 19-07-2018
Publisher: Springer Singapore
Published in: Journal of Iron and Steel Research International / Issue 5/2019
Print ISSN: 1006-706X
Electronic ISSN: 2210-3988
DOI: https://doi.org/10.1007/s42243-018-0113-4

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Desulfurization thermodynamics experiment of stainless steel pickling sludge

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