|
|
|
| Pyrometallurgical recycling of stainless steel pickling sludge: a review |
| Cong-cong Yang 1 , Jian Pan 1 De-qing Zhu 1 Zheng-qi Guo 1 Xiao-ming Li 2 |
| 1 School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China; 2 School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China |
|
|
|
|
Abstract Stainless steel pickling sludge (SSPS), generated from the lime neutralization process of spent pickling liquor, is classified as a hazardous waste consisting of abundant metals like Fe, Cr and Ni, and other elements like F, S and Na, etc. Rather than a common disposal in landfill, recovering these metals and other valuable components from SSPS can not only create economic benefits, but also eliminate its adverse impacts on human health and the environment. A review of the formation mechanism and basic properties of SSPS was made, and the technical features, advantages and limitations of a series of pyrometallurgical treatment processes were summarized. Based on these, the main challenges for recycling of SSPS through the existing techniques are demonstrated. The traditional pelletizing/sintering-blast furnace process can only be used as a partial solution. Direct use of SSPS as flux in an argon–oxygen decarburization converter or electric arc furnace is a promising way, but low S sludges are preferred. The STAR process shows excellent recovery for metals, but it also has a low tolerance to the S and F contents in SSPS. And the INMETCO process is highly flexible in treatment of various wastes, whereas it exhibits relatively low Cr recovery and produces poor-quality pig iron. In addition, the feasibility of the rotary kiln-electric furnace, solid-state reduction of chromite and reduction-magnetic separation processes requires further studies. An urgent task at present is to develop a system for scientific classification and separate collection of SSPS in terms of chemical composition, notably S and F contents.
|
|
|
|
|
|
| Cite this article: |
|
Cong-cong Yang,Jian Pan,De-qing Zhu, et al. Pyrometallurgical recycling of stainless steel pickling sludge: a review[J]. Journal of Iron and Steel Research International, 2019, 26(6): 547-557.
|
|
|
|
| [1] |
Jin-gang Bai, Yi-shi Cui, Jian Wang, Nan Dong, Muhammad Saqlain Qurashi, Hai-rui Wei, Yong-chao Yang, Pei-de Han. Effect of compression deformation on precipitation phase behavior of B-containing S31254 super austenitic stainless steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(7): 712-719. |
| [2] |
Hou-long Liu, Ming-yu Ma, Ling-ling Liu, Liang-liang Wei, Li-qing Chen. Effect of W addition on hot deformation and precipitation behaviors of 19Cr2Mo ferritic stainless steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(5): 425-434. |
| [3] |
Tian-hai Wu, Jian-jun Wang, Hua-bing Li, Zhou-hua Jiang, Chun-ming Liu, Hong-yang Zhang. Effect of heat input on austenite microstructural evolution of simulated heat affected zone in 2205 duplex stainless steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(5): 435-441. |
| [4] |
Wen-tao Wang, Jiao Zhang, Feng-li Sui, Zhi-xia Zhang, Hong-yun Bi. A comparison of deformation, microstructure, mechanical properties and formability of SUS436L stainless steel in tandem and reversible cold rolling processes[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(5): 442-451. |
| [5] |
Jian Wang, Wan-li Chen, Hao-jie Meng, Yi-shi Cui, Cai-li Zhang, Pei-de Han. Influence of sigma phase on corrosion and mechanical properties of 2707 hyper-duplex stainless steel aged for short periods[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(5): 452-461. |
| [6] |
Yang-fan Jin, Tuo Zhang, Qi-yu Zang, Yi-tao Yang. Behavior of Nb influence on structure and properties of 30Cr13 cast martensitic stainless steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(5): 462-471. |
|
|
|
|
2019, Vol. 26 
