Phase Identification of Crystal Precipitated from Molten CaO–SiO&lt;sub&gt;2&lt;/sub&gt;–FeO&lt;sub&gt;x&lt;/sub&gt;–P&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt; Slag by High Temperature &lt;i&gt;In-situ&lt;/i&gt; X-ray Diffraction

Suzuki, Masanori; Serizawa, Honami; Umesaki, Norimasa

doi:10.2355/isijinternational.isijint-2020-148

Cited by 14 publications

(5 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The black P-rich phase A contains high content of P 2 O 5 in the form of nC 2 S-C 3 P solid solution containing a little soluted FeO. [25] The white Fe-rich phase B mainly contains FeO, MnO, and MgO. The morphologies of the P-rich phase A and Ferich phase B are similar to those in the previous results.…”

Section: Change In Mineralogical Morphologies Of Dephosphorization Slags At Different Reaction Timessupporting

confidence: 84%

Dephosphorization in New Double Slag Converter Steelmaking Process with High‐Temperature Laboratorial Experiments

Yang

Zhang

Sun

et al. 2021

steel research int.

View full text Add to dashboard Cite

The dephosphorization of hot metal with low basicity slag at 1623 K is investigated for new double slag converter steelmaking process (NDSP) using hightemperature laboratorial experiments. When the dephosphorization time is 15 min, the dephosphorization ratio reaches the highest value of 83.2%. When the dephosphorization times are 3 and 6 min, the main phases of dephosphorization slag are black phosphorus(P)-rich phase and white Fe-rich phase. When the dephosphorization times are 9, 12, and 15 min, the main phases are the P-rich phase, the Fe-rich phase, and the matrix phase. When the dephosphorization time is 18 min, the main phases are the Fe-rich phase, the matrix phase, and spinel phase containing MgO and Al 2 O 3 , but without the P-rich phase. With increasing the dephosphorization time, the area fraction of the Fe-rich phase in slag is continuously decreased and the area fraction of matrix phase is increased. The area fraction of the P-rich phase is first increased, then decreased until it is disappeared, due to its dissolution into the matrix phase at the low basicity of about 1.4.

show abstract

Section: Change In Mineralogical Morphologies Of Dephosphorization Slags At Different Reaction Timessupporting

confidence: 84%

Dephosphorization in New Double Slag Converter Steelmaking Process with High‐Temperature Laboratorial Experiments

Yang

Zhang

Sun

et al. 2021

steel research int.

View full text Add to dashboard Cite

show abstract

“…studied the formation mechanisms of P 2 O 5 -containing phase [9][10][11][12] , the phase relationship between solid and liquid phase [13][14][15] and the thermodynamic properties of P 2 O 5 -containing phase 16,17) . Wang et al 18) reported that the addition of Na 2 O and B 2 O 3 could affect the morphology of the solid solution and the phosphorous partition.…”

Section: Introductionmentioning

confidence: 99%

Effect of Slag Phase on Dephosphorization in BOF

Xia,

Wang,

et al. 2023

ISIJ Int.

View full text Add to dashboard Cite

In this work, the effect of the slag phase on dephosphorization in BOF (basic oxygen furnace) is explored by industrial practical experiments. The research results show that the final dephosphorization rate is related to the phase of slag rather than basicity and T.Fe content in slag. The correlation between the dephosphorization ability of slag and the proportion of liquid phase (phase B) and phosphorus-containing solid solution phase (phase A) in the slag is much higher than that of RO (MgO•FeO, MnO•FeO) phase (phase C). The phosphorous partition fitting by using the minimum second-order multiplication proposed in this work is compared with the equations suggested by Healy and Ogawa. The comparison result shows that the dephosphorization ability of slag can be well predicted by analyzing the proportion of liquid phase and phosphorus-containing solid solution phase in slag, and the mechanism of the influence of the slag phase on dephosphorization is discussed.

show abstract

“…Many studies have been conducted to examine multiphase flux systems. These studies focused on several aspects including the formation mechanism of C 2 S-C 3 P, dissolution behaviour of C 2 S-C 3 P, phosphorus partition between C 2 S-C 3 P and steel slag, isothermal crystallisation of C 2 S-C 3 P, interfacial oxygen potential, C 2 S-C 3 P changing on dephosphorization behaviour, formation free energies of C 2 S-C 3 P, and the activity of the components in the multiphase flux system [5,[10][11][12][13][14][15][16][17][18][19][20]. Few other studies focused on the techniques and mechanisms governing the mass transfer behaviour of phosphorus.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus diffusion at the interface between 2CaO·SiO₂ and CaO–SiO₂–FeO–P₂O₅ slag

Song

Chou

2022

Ironmaking & Steelmaking

View full text Add to dashboard Cite

The reaction behaviour of solid 2CaO•SiO 2 (C 2 S) in steel slag is of great interest during the hot-metal dephosphorization process. In the present work, C 2 S samples were prepared and interfaced with steel slag to investigate the phosphorus diffusion behaviour at the interface of C 2 S at 1723K at the onset of the slag melting. The results showed that the phosphorus diffusion from the slag to C 2 S was very rapid with a significant diffusion coefficient of 4.44 × 10 −9 m 2 •s −1 . Phosphorus-enriched phases were formed continuously with increasing reaction time. As the reaction time increases, the composition of the diffusion layer becomes closer to 3CaO•P 2 O 5 (C 3 P) and farther away from the C 2 S. The results indicate that a hot-metal dephosphorization process with much higher efficiency can be achieved by the careful selection of the interface characteristics between the C 2 S and steel slag.

show abstract

Phase Identification of Crystal Precipitated from Molten CaO–SiO<sub>2</sub>–FeO<sub>x</sub>–P<sub>2</sub>O<sub>5</sub> Slag by High Temperature <i>In-situ</i> X-ray Diffraction

Cited by 14 publications

References 43 publications

Dephosphorization in New Double Slag Converter Steelmaking Process with High‐Temperature Laboratorial Experiments

Dephosphorization in New Double Slag Converter Steelmaking Process with High‐Temperature Laboratorial Experiments

Effect of Slag Phase on Dephosphorization in BOF

Phosphorus diffusion at the interface between 2CaO·SiO₂ and CaO–SiO₂–FeO–P₂O₅ slag

Contact Info

Product

Resources

About

Phase Identification of Crystal Precipitated from Molten CaO–SiO<sub>2</sub>–FeO<sub>x</sub>–P<sub>2</sub>O<sub>5</sub> Slag by High Temperature <i>In-situ</i> X-ray Diffraction

Cited by 14 publications

References 43 publications

Dephosphorization in New Double Slag Converter Steelmaking Process with High‐Temperature Laboratorial Experiments

Dephosphorization in New Double Slag Converter Steelmaking Process with High‐Temperature Laboratorial Experiments

Effect of Slag Phase on Dephosphorization in BOF

Phosphorus diffusion at the interface between 2CaO·SiO2 and CaO–SiO2–FeO–P2O5 slag

Contact Info

Product

Resources

About

Phosphorus diffusion at the interface between 2CaO·SiO₂ and CaO–SiO₂–FeO–P₂O₅ slag