CAS OpenIR
Harmless treatment and resource utilization of stainless steel pickling sludge via direct reduction and magnetic separation
Wu, Ming-Tao1,2,3; Li, Yong-Li1,2; Guo, Qiang1,2; Shao, Da-Wei1,2; He, Ming-Ming1,2; Qi, Tao1,2
2019-12-10
Source PublicationJOURNAL OF CLEANER PRODUCTION
ISSN0959-6526
Volume240Pages:7
AbstractThe process of neutralization of stainless steel pickling wastewater will produce a lot of pickling sludge, and improper treatment of this sludge poses a serious threat to the environment. This paper presents a new process for disposing stainless steel pickling sludge in an environmentally friendly manner while effectively reusing the elements contained in the sludge. This process involved direct reduction with magnetic separation. First, the harmful components of sludge were turned into harmless components by converting Fe3+, Cr3+, and Ni2+ to Fe, Cr, and Ni metals by direct reduction. The temperature of reduction was 1473 K, which was lower than the existing process temperature (1673 K). Then, the reduction product was subjected to magnetic separation, whose efficiency is high, to separate metals and nonmetals. Consequently, the metal alloy powder (Ni + Cr + Fe) and nonmetallic phase, which were harmless, were collected. The nonmetallic phase was mainly composed of CaF2. The recovery rates of Fe, Cr, and Ni were 95.3%, 88.7%, and 97.53%, respectively, and their grades were 69.31%, 7.60%, and 16.71%, respectively. Alloy powder can be used as raw material for stainless steel smelting. (C) 2019 Published by Elsevier Ltd.
KeywordPickling sludge Direct reduction Magnetic separation Resourcing
DOI10.1016/j.jclepro.2019.118187
Language英语
WOS KeywordSOLID-STATE REDUCTION ; CHROMIUM
Funding ProjectNational Natural Science Foundation of China[51304181] ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences[QYZDJ-SSW-JSC021] ; Key Research Program of Chinese Academy of Sciences[ZDRW-ZS-2018-1]
WOS Research AreaScience & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
WOS SubjectGreen & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences
Funding OrganizationNational Natural Science Foundation of China ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences
WOS IDWOS:000487936100091
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/31095
Collection中国科学院过程工程研究所
Corresponding AuthorLi, Yong-Li; Guo, Qiang
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wu, Ming-Tao,Li, Yong-Li,Guo, Qiang,et al. Harmless treatment and resource utilization of stainless steel pickling sludge via direct reduction and magnetic separation[J]. JOURNAL OF CLEANER PRODUCTION,2019,240:7.
APA Wu, Ming-Tao,Li, Yong-Li,Guo, Qiang,Shao, Da-Wei,He, Ming-Ming,&Qi, Tao.(2019).Harmless treatment and resource utilization of stainless steel pickling sludge via direct reduction and magnetic separation.JOURNAL OF CLEANER PRODUCTION,240,7.
MLA Wu, Ming-Tao,et al."Harmless treatment and resource utilization of stainless steel pickling sludge via direct reduction and magnetic separation".JOURNAL OF CLEANER PRODUCTION 240(2019):7.
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