CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
A thermodynamic model for predicting phosphate capacity of CaO-based slags during hot metal dephosphorisation pretreatment process
Yang, X. M.1; Li, J. Y.1,2; Chai, G. M.1,3; Duan, D. P.1; Zhang, J.2
2017
Source PublicationIRONMAKING & STEELMAKING
ISSN0301-9233
Volume44Issue:6Pages:437-454
Abstract

A thermodynamic model for predicting phosphate capacity C-PO(4)3- of the CaO-based slags over a temperature range from 1750 to 1793 K (1477-1520 degrees C) during dephosphorisation pretreatment of hot metal has been developed based on the ion and molecule coexistence theory (IMCT), i.e. the IMCT-C-PO(4)3- model. The developed IMCT-C-PO(4)3- model has been verified to be valid through comparing with the measured and the predicted ones by four reported C-PO(4)3- models from the literature. Besides the total phosphate capacity C-PO(4)3-, the respective phosphate capacity C-PO(4)3-, i of nine dephosphorisation products as P2O5, 3FeO center dot P2O5, 4FeO center dot P2O5, 2CaO center dot P2O5, 3CaO center dot P2O5, 4CaO center dot P2O5, 2MgO center dot P2O5, 3MgO center dot P2O5 and 3MnO center dot P2O5 can also be accurately predicted by the developed IMCT-C-PO(4)3- model. The formed 3CaO center dot P2O5 accounts for 99.20% of dephosphorisation products comparing with the generated 4CaO center dot P2O5 for 0.80%. The results also revealed that the effects of slag chemical composition including slag oxidisation ability, slag basicity and the comprehensive influence of iron oxides FetO and basic oxide CaO on phosphate capacity C-PO(4)3- were largely different with those on phosphorus partition LP between the CaO-based slags and hot metal. Although C-PO(4)3- and LP are both distinct thermodynamic quantities and related to each others provided that the entire slag system is correctly defined, phosphorus partition LP has much guide meaning on dephosphorisation operation than phosphate capacity C-PO(4)3-. The main interest of measuring phosphate capacity C-PO(4)3- from laboratory experiments can be attributed to obtain phosphorus partition LP through relationship between C-PO(4)3- and L-P.

KeywordPhosphate Capacity Phosphorus Partition Dephosphorisation Mechanism Thermodynamic Model Cao-based Slags Hot Metal Dephosphorisation Pretreatment Process Ion And Molecule Coexistence Theory (Imct)
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1080/03019233.2016.1214384
Indexed BySCI
Language英语
WOS KeywordMolecule Coexistence Theory ; Cao-sio2-mgo-al2o3 Ironmaking Slags ; Complex Steelmaking Slags ; Sulfur Distribution Ratio ; Large Variation Range ; Optical Basicity ; Liquid-iron ; Metallurgical Slags ; Sulfide Capacity ; Cao-feo-fe2o3-al2o3-p2o5 Slags
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China (NSFC)(51174186)
WOS IDWOS:000410645800006
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23225
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
3.Shanxi Taigang Stainless Steel Corp Ltd, Steelmaking Steel Plant 2, Taiyuan 030003, Shanxi, Peoples R China
Recommended Citation
GB/T 7714
Yang, X. M.,Li, J. Y.,Chai, G. M.,et al. A thermodynamic model for predicting phosphate capacity of CaO-based slags during hot metal dephosphorisation pretreatment process[J]. IRONMAKING & STEELMAKING,2017,44(6):437-454.
APA Yang, X. M.,Li, J. Y.,Chai, G. M.,Duan, D. P.,&Zhang, J..(2017).A thermodynamic model for predicting phosphate capacity of CaO-based slags during hot metal dephosphorisation pretreatment process.IRONMAKING & STEELMAKING,44(6),437-454.
MLA Yang, X. M.,et al."A thermodynamic model for predicting phosphate capacity of CaO-based slags during hot metal dephosphorisation pretreatment process".IRONMAKING & STEELMAKING 44.6(2017):437-454.
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