2018
DOI: 10.3390/met8121083
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A Further Evaluation of the Coupling Relationship between Dephosphorization and Desulfurization Abilities or Potentials for CaO-based Slags: Influence of Slag Chemical Composition

Abstract: The coupling relationships between dephosphorization and desulfurization abilities or potentials for CaO–FeO–Fe2O3–Al2O3–P2O5 slags over a large variation range of slag oxidization ability during the secondary refining process of molten steel have been proposed by the present authors as logLp + 5logLs or logCpo3-4 + logCs2- in the reducing zone and as logLp + logLs - 5logNFetO or logCPO3-4 + logCs2- in the oxidizing zone based on the ion and molecule coexistence theory (IMCT). In order to further verify the… Show more

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Cited by 11 publications
(3 citation statements)
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“…It is quite essential to establish a thermodynamic model for calculating the titanium distribution ratio between steel and slag. The ion-molecule coexistence theory (IMCT) has been efficaciously applied to describe phosphate capacity, manganese distribution, sulfide capacity, and so on, as shown in Table 1 [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In the IMCT, the defined mass action-concentration (MAC) is consistent with the classical concept of activity in the slag.…”
Section: Introductionmentioning
confidence: 94%
“…It is quite essential to establish a thermodynamic model for calculating the titanium distribution ratio between steel and slag. The ion-molecule coexistence theory (IMCT) has been efficaciously applied to describe phosphate capacity, manganese distribution, sulfide capacity, and so on, as shown in Table 1 [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In the IMCT, the defined mass action-concentration (MAC) is consistent with the classical concept of activity in the slag.…”
Section: Introductionmentioning
confidence: 94%
“…However, it is difficult to determine the activity of each constituent in a complex refining slag. The IMCT provides an effective way to obtain the activity of a complicated slag [41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. In the IMCT, the defined mass action-concentration (MAC) is consistent with the classical concept of activity in the slag.…”
Section: Generation Mechanism Of Mgo•al2o3 Inclusionsmentioning
confidence: 99%
“…The reaction capacity or activity of the component in the slag is characterized by the mass action concentration of the component (N i ), which is defined as the mole fraction under the equilibrium condition of the slag system. Based on the IMCT, Yang et al [17][18][19][20][21][22][23][24] had successfully developed a thermodynamic model for predicting L P between molten steel and CaO-SiO 2 -MgO-FeO-Fe 2 O 3 -MnO-Al 2 O 3 -P 2 O 5 slags during top-bottom combined blown converter steelmaking process, and a thermodynamic model for predicting the phosphate capacity of CaO-SiO 2 -MgO-FeO-Fe 2 O 3 -MnO-Al 2 O 3 -P 2 O 5 slags at the steelmaking endpoint during an 80-ton top-bottom combined blown converter steelmaking process, simultaneously proposed the coupling relationships between dephosphorization and desulphurization abilities or potentials for CaO-FeO-Fe 2 O 3 -Al 2 O 3 -P 2 O 5 slags over a large variation range of slag oxidization ability during the secondary refining process of molten steel. The aforementioned models can be valid for predicting dephosphorization ability of CaO-based slags between hot metal and molten steel, respectively.…”
Section: Introductionmentioning
confidence: 99%