NDLI: Prediction Model of Sulfide Capacity for CaO-FeO-Fe$_{2}$O$_{3}$-Al$_{2}$O$_{3}$-P$_{2}$O$_{5}$ Slags in a Large Variation Range of Oxygen Potential Based on the Ion and Molecule Coexistence Theory

Content Provider	Springer Nature Link
Author	Yang, Xue Min Li, Jin Yan Zhang, Meng Chai, Guo Min Zhang, Jian
Copyright Year	2014
Abstract	A thermodynamic model for predicting sulfide capacity $$ C_{{{\text{S}}^{2 -}}} $$ of CaO-FeO-Fe$_{2}$O$_{3}$-Al$_{2}$O$_{3}$-P$_{2}$O$_{5}$ slags in a large variation range of oxygen potential $$ p_{{{\text{O}}_{ 2}}} $$ corresponding to mass percentage of Fe$_{ t }$O from 1.88 to 55.50 pct, i.e., IMCT- $$ C_{{{\text{S}}^{2 -}}} $$ model, has been developed by coupling with the deduced desulfurization mechanism of the slags based on the ion and molecule coexistence theory (IMCT). The developed IMCT- $$ C_{{{\text{S}}^{2 -}}} $$ model has been verified through comparing the determined sulfide capacity $$ C_{{{\text{S}}^{ 2-} , {\text{ determined}}}} $$ after Ban-ya et al.[20] with the calculated $$ C_{{{\text{S}}^{ 2-} , {\text{ calculated}}}}^{\text{IMCT}} $$ by the developed IMCT- $$ C_{{{\text{S}}^{2 -}}} $$ model and the calculated $$ C_{{{\text{S}}^{ 2-} , {\text{ calculated}}}}^{i} $$ by the reported sulfide capacity $$ C_{{{\text{S}}^{2 -}}} $$ models such as the KTH model. Mass percentage of Fe$_{ t }$O as 6.75 pct corresponding to the mass action concentration $$ N_{{{\text{Fe}}_{t} {\text{O}}}} $$ of Fe$_{ t }$O as 0.0637 or oxygen partial $$ p_{{{\text{O}}_{2} }} $$ as 2.27 × 10$^{−6}$ Pa is the criterion for distinguishing reducing and oxidizing zones for the slags. Sulfide capacity $$ C_{{{\text{S}}^{2 - } }} $$ of the slags in reducing zone is controlled by reaction ability of CaO regardless of slag oxidization ability. However, sulfide capacity $$ C_{{{\text{S}}^{2 - } }} $$ of the slags in oxidizing zone shows an obvious increase tendency with the increasing of slag oxidization ability. Sulfide capacity $$ C_{{{\text{S}}^{2 - } }} $$ of the slags in reducing zone keeps almost constant with variation of the simplified complex basicity (pct CaO)/((pct Al$_{2}$O$_{3}$) + (pct P$_{2}$O$_{5}$)), or optical basicity, or the mass action concentration ratios of N $_{FeO}$/N $_{CaO}$, $$ N_{{{\text{Fe}}_{ 2} {\text{O}}_{ 3} }} /N_{\text{CaO}} $$ , $$ N_{{{\text{FeO}} \cdot {\text{Fe}}_{2} {\text{O}}_{3} }} /N_{\text{CaO}} $$ , and $$ N_{{{\text{Fe}}_{t} {\text{O}}}} /N_{\text{CaO}} $$ . Sulfide capacity $$ C_{{{\text{S}}^{2 - } }} $$ of the slags in oxidizing zone shows an obvious increase with the increasing of the simplified complex basicity (pct CaO)/((pct Al$_{2}$O$_{3}$) + (pct P$_{2}$O$_{5}$)) or optical basicity, or the aforementioned mass action concentration ratios. Thus, the aforementioned mass action concentration ratios and the corresponding mass percentage ratios of various iron oxides to basic oxide CaO are recommended to represent the comprehensive effect of various iron oxides and basic oxide CaO on sulfide capacity $$ C_{{{\text{S}}^{2 - } }} $$ of the slags.
Starting Page	2118
Ending Page	2137
Page Count	20
File Format	PDF
ISSN	10735615
Journal	Metallurgical and Materials Transactions B
Volume Number	45
Issue Number	6
e-ISSN	15431916
Language	English
Publisher	Springer US
Publisher Date	2014-07-24
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Metals and Alloys Mechanics of Materials Condensed Matter Physics

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