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| Desulfurization thermodynamics experiment of stainless steel pickling sludge |
| Xiao-ming Li 1,2 ， Ming Lv 1,2 ， Wei-dong Yin 1 ， Jun-xue Zhao 1,2 ， Ya-ru Cui 1,2 |
| 1 School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China 2 Research Center of Metallurgical Engineering and Technology of Shaanxi Province, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China |
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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 pretreatment 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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| Cite this article: |
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Xiao-ming Li,Ming Lv,Wei-dong Yin, et al. Desulfurization thermodynamics experiment of stainless steel pickling sludge[J]. Journal of Iron and Steel Research International, 2019, 26(5): 519-528.
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2019, Vol. 26 
