Harmless treatment and resource utilization of stainless steel pickling sludge via direct reduction and magnetic separation

doi:10.1016/j.jclepro.2019.118187

	Harmless treatment and resource utilization of stainless steel pickling sludge via direct reduction and magnetic separation
	Wu, Ming-Tao 1,2,3; Li, Yong-Li 1,2; Guo, Qiang 1,2; Shao, Da-Wei 1,2; He, Ming-Ming 1,2; Qi, Tao 1,2
刊名	JOURNAL OF CLEANER PRODUCTION
	2019-12-10
卷号	240 页码:7
关键词	Pickling sludge Direct reduction Magnetic separation Resourcing
ISSN号	0959-6526
DOI	10.1016/j.jclepro.2019.118187
英文摘要	The 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.
资助项目	National 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关键词	SOLID-STATE REDUCTION ; CHROMIUM
WOS研究方向	Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000487936100091
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/31094]
专题	中国科学院过程工程研究所
通讯作者	Li, Yong-Li; Guo, Qiang
作者单位	1.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
推荐引用方式 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.