CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
Selective Leaching of Steelmaking Slag for Indirect CO2 Mineral Sequestration
Bao, Weijun1,2; Li, Huiquan1; Zhang, Yi1; Li, HQ
2010-03-03
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume49Issue:5Pages:2055-2063
AbstractIndirect CO2 mineral sequestration, which could make CO2 fixate into precipitated calcium carbonate (PCC) of value-added products, is an important technology that is used to reduce greenhouse gas emissions economically. It can be conducted in two steps, one of which has been investigated in the previous paper. In this work, extraction of calcium ions from steelmaking slag using it novel leaching medium, which involves organic solvent tributyl phosphate (TBP), acetic acid, and ultrapure water, was studied. Several operating variables, including stirring speed, phase-volume ratio, organic solvent-to-solid ratio, initial acetic acid concentration, acid-to-slag ratio, reaction temperature, and reaction time were investigated. It was found that the leaching process could be divided into three regions according to the acid-to-slag ratio. The first region below 0.5 g/g was characterized by the acid-to-solid ratio; the second region above 0.5 g/g but below 1.0 g/g was characterized by the acid-to-solid ration and the third region above 1.0 g/g was characterized by the acid-to-solid ratio. When the acid-to-solid ratio was below 1.0 g/g, only Ca and Mo could be leached with the maximum leached ratios of 75% and 35%, respectively. Moreover, the leaching behaviors of Ca Mg, Fe, Al, and Si were greatly affected by reaction temperature and reaction time. Results show that the Calcium ions can be effectively and selectively extracted from the steelmaking slag and that the reaction medium can be recovered and recycled with high efficiency. These are the keys to indirect CO2 mineral sequestration.
KeywordAcetic-acid Calcium-carbonate Ambient-pressure Waste Cement Steel Slag Extraction Chemistry Temperature Kinetics Design
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie801850s
Indexed BySCI
Language英语
WOS KeywordACETIC-ACID ; CALCIUM-CARBONATE ; AMBIENT-PRESSURE ; WASTE CEMENT ; STEEL SLAG ; EXTRACTION ; CHEMISTRY ; TEMPERATURE ; KINETICS ; DESIGN
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000274752700008
Citation statistics
Cited Times:50[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6184
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorLi, HQ
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Clean Prod Technol Hydromet, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Bao, Weijun,Li, Huiquan,Zhang, Yi,et al. Selective Leaching of Steelmaking Slag for Indirect CO2 Mineral Sequestration[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2010,49(5):2055-2063.
APA Bao, Weijun,Li, Huiquan,Zhang, Yi,&Li, HQ.(2010).Selective Leaching of Steelmaking Slag for Indirect CO2 Mineral Sequestration.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,49(5),2055-2063.
MLA Bao, Weijun,et al."Selective Leaching of Steelmaking Slag for Indirect CO2 Mineral Sequestration".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 49.5(2010):2055-2063.
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