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Optimization of Mineralogy and Microstructure of Solidified Basic Oxygen Furnace Slag Through SiO2 Addition or Atmosphere Control During Hot-Stage Slag Treatment
Liu, Chunwei1,2; Huang, Shuigen3; Blanpain, Bart3; Guo, Muxing3
2019-02-01
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
ISSN1073-5615
Volume50Issue:1Pages:210-218
AbstractValorization of basic oxygen furnace (BOF) slag is of significant importance for mitigation of the steel production's environmental impact. The present work aims to investigate the influence of SiO2 addition and oxygen partial pressure on the mineralogical modification of a typical industrial BOF slag. The slag basicity (mass ratio of CaO/SiO2) was varied from 1.8 to 4.4 by mixing specific amounts of SiO2 with the master BOF slag. The original and modified slags were remelted and solidified under argon or air atmosphere followed by slow cooling. The experimental observations were then compared with the results of thermodynamic modeling to achieve a thorough understanding. With decreasing the basicity, free lime was eliminated, as it forms dicalcium silicate (Ca2SiO4). With increasing oxygen partial pressure, wustite was oxidized to hematite, which combined with free lime to form calcium aluminoferrite (C(2)AF). The effects of SiO2 addition and oxygen partial pressure were finally evaluated with respect to the energy consumption for the BOF slag valorization. The modified slag is suitable as a precursor for construction applications as binders.
DOI10.1007/s11663-018-1444-z
Language英语
WOS KeywordSTEEL SLAG ; IRON-OXIDE ; BOF SLAG ; CARBONATION ; STABILIZATION ; PHOSPHORUS ; PREDICTION ; ENRICHMENT ; BREDIGITE ; RECOVERY
Funding ProjectAgency for Innovation by Science and Technology of Belgium (IWT)[140514] ; China Scholarship Council (CSC)[201306080002]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationAgency for Innovation by Science and Technology of Belgium (IWT) ; China Scholarship Council (CSC)
WOS IDWOS:000456070300022
PublisherSPRINGER
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/27735
Collection中国科学院过程工程研究所
Corresponding AuthorLiu, Chunwei
Affiliation1.Katholieke Univ Leuven, Dept Mat Engn, B-3000 Leuven, Belgium
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, 1 North 2nd St, Beijing 100190, Peoples R China
3.Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44,Box 2450, B-3001 Leuven, Belgium
Recommended Citation
GB/T 7714
Liu, Chunwei,Huang, Shuigen,Blanpain, Bart,et al. Optimization of Mineralogy and Microstructure of Solidified Basic Oxygen Furnace Slag Through SiO2 Addition or Atmosphere Control During Hot-Stage Slag Treatment[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,2019,50(1):210-218.
APA Liu, Chunwei,Huang, Shuigen,Blanpain, Bart,&Guo, Muxing.(2019).Optimization of Mineralogy and Microstructure of Solidified Basic Oxygen Furnace Slag Through SiO2 Addition or Atmosphere Control During Hot-Stage Slag Treatment.METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,50(1),210-218.
MLA Liu, Chunwei,et al."Optimization of Mineralogy and Microstructure of Solidified Basic Oxygen Furnace Slag Through SiO2 Addition or Atmosphere Control During Hot-Stage Slag Treatment".METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE 50.1(2019):210-218.
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