Performance of Low Fluoride Dephosphorization Slag of Hot Metal

The purpose of the study is to decrease content of CaF2 in dephosphorization slag. The dephosphorization effects of CaF2 replaced by B2O3 were investigated. The dephosphorization experiments were carried out at 1 450 ℃ in air atmosphere. The results show that the melting points and dephosphorization...

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Bibliographic Details
Published in:Journal of iron and steel research, international international, 2011, Vol.18 (1), p.11-15
Main Authors: LIU, Li-xia, WANG, Shi-jun, DONG, Yuan-chi, JIA, Xiao-hui
Format: Article
Language:English
Subjects:
Applied and Technical Physics
CaF2
Calcium fluoride
Dephosphorization
Engineering
hot metal pretreatment
Iron and steel industry
Iron and steel making
low fluoride slag
Machines
Manufacturing
Materials Engineering
Materials Science
Melting points
Metallic Materials
phosphate capacity
Physical Chemistry
Pollution abatement
Processes
Slags
Steels
氟化钙
空气气氛
铁水脱磷
铁水预处理
除磷效果
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Summary:The purpose of the study is to decrease content of CaF2 in dephosphorization slag. The dephosphorization effects of CaF2 replaced by B2O3 were investigated. The dephosphorization experiments were carried out at 1 450 ℃ in air atmosphere. The results show that the melting points and dephosphorization ratios change little when CaF2 was replaced by B2O3. The dephosphorization ratios are all greater than 80% and melting points can meet the requirement of hot metal pretreatment. Because of the change of alkalinity caused by B2 03, the oxidation of slag increases with increasing of B2 Oa contents. It is beneficial to pre-dephosphorization. As a result, for decreasing its pollution, CaF2 can be replaced by B2Oa to dispose fluoride-free pre-dephosphorization slag.
ISSN:1006-706X
2210-3988
DOI:10.1016/S1006-706X(11)60003-4