Phase relationship for the CaOSiO2FeO5 mass%P2O 5 System with Oxygen Partial Pressure of 10-8 atm at 1673 and 1623K

Xu Gao, Hiroyuki Matsuura, Il Sohn, Wanlin Wang, Dong Joon Min, Fumitaka Tsukihashi

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Dephosphorization process by using multiphase flux requires smaller slag amount than conventional process, while the high refining efficiency can still be achieved, due to the promotion of the CaO utilization. In order to provide proper phase diagram for understanding the reaction mechanism, the phase relationship for the CaOSiO2FeO5 mass%P2O 5 quaternary system has been studied with oxygen partial pressure of 1010-8 atm at 1673 and 1623K by using chemical equilibration technique. It has been found that the solid solution exists only as 2CaOSiO 23CaO P2O5, and the ratio between both varies with liquid phase compositions. On the other hand, the liquidus for both 1673 and 1623K that saturated with above solid solution, moves close to the FeO apex comparing with the CaOSiO2FeOx system equilibrated with iron. Besides, the large phosphorus partition ratio between solid solution and liquid slag has also been found, which agrees well with previous works. Based on the regular solution model, both activities and activity coefficients of P 2O5 have been discussed.

Original languageEnglish
Pages (from-to)544-552
Number of pages9
JournalMaterials Transactions
Volume54
Issue number4
DOIs
Publication statusPublished - 2013 Apr 8

Fingerprint

Partial pressure
partial pressure
Solid solutions
phosphorus pentoxide
solid solutions
slags
Oxygen
Slags
oxygen
Activity coefficients
liquidus
refining
Liquids
promotion
Phase composition
Phosphorus
Refining
Phase diagrams
phosphorus
partitions

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Gao, Xu ; Matsuura, Hiroyuki ; Sohn, Il ; Wang, Wanlin ; Min, Dong Joon ; Tsukihashi, Fumitaka. / Phase relationship for the CaOSiO2FeO5 mass%P2O 5 System with Oxygen Partial Pressure of 10-8 atm at 1673 and 1623K. In: Materials Transactions. 2013 ; Vol. 54, No. 4. pp. 544-552.
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abstract = "Dephosphorization process by using multiphase flux requires smaller slag amount than conventional process, while the high refining efficiency can still be achieved, due to the promotion of the CaO utilization. In order to provide proper phase diagram for understanding the reaction mechanism, the phase relationship for the CaOSiO2FeO5 mass{\%}P2O 5 quaternary system has been studied with oxygen partial pressure of 1010-8 atm at 1673 and 1623K by using chemical equilibration technique. It has been found that the solid solution exists only as 2CaOSiO 23CaO P2O5, and the ratio between both varies with liquid phase compositions. On the other hand, the liquidus for both 1673 and 1623K that saturated with above solid solution, moves close to the FeO apex comparing with the CaOSiO2FeOx system equilibrated with iron. Besides, the large phosphorus partition ratio between solid solution and liquid slag has also been found, which agrees well with previous works. Based on the regular solution model, both activities and activity coefficients of P 2O5 have been discussed.",
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Phase relationship for the CaOSiO2FeO5 mass%P2O 5 System with Oxygen Partial Pressure of 10-8 atm at 1673 and 1623K. / Gao, Xu; Matsuura, Hiroyuki; Sohn, Il; Wang, Wanlin; Min, Dong Joon; Tsukihashi, Fumitaka.

In: Materials Transactions, Vol. 54, No. 4, 08.04.2013, p. 544-552.

Research output: Contribution to journalArticle

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AU - Gao, Xu

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AU - Sohn, Il

AU - Wang, Wanlin

AU - Min, Dong Joon

AU - Tsukihashi, Fumitaka

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