Thermodynamic behavior of nickel in CaO-SiO2-FetO slag

Sang Hoon Lee; Seok Min Moon; Joo Hyun Park; Dong Joon Min

doi:10.1007/s11663-002-0085-3

Thermodynamic behavior of nickel in CaO-SiO₂-Fe_tO slag

Sang Hoon Lee, Seok Min Moon, Joo Hyun Park, Dong Joon Min

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

The distribution ratio of nickel between Ag-Ni alloy and CaO-SiO₂-Fe_tO slag at high temperatures was measured to clarify the dissolution mechanism of nickel in this melt. Also, the nickel oxide capacity was suggested and was compared to phosphate and sulfide capacities. The dissolution mechanism of nickel into the CaO-SiO₂-Fe_tO slags could be described by the following equation from the effect of oxygen potential and slag basicity on nickel dissolution behavior: Ni (1) + 1/2 O₂ (g) + O^2- (slag) = NiO₂^2- (slag). The nickel oxide capacity increases with increasing CaO/SiO₂ ratio at a fixed Fe_tO content. When the ratio of X_CaO to X_SiO(2) (C/S) is about 1.1 to 1.3, log C_NiO(2)(2-) increases with increasing Fe_tO content up to about 35 mol pct, followed by a nearly constant value of C_NiO(2)(2-) ≅ 10³. In the composition of C/S = 0.5 to 0.7, log C_NiO(2)(2-) exhibits a maximum value at about 50 mol pct Fe_tO. From the iso-C_NiO(2)(2-) trends in ternary phase diagram, nickel oxide capacity dominantly depends on Fe_tO content in slags; it exhibits a maximum value of C_NiO(2)(2-) ≅ 10³ at X_Fe(t)O ≅ 0.5. The relationship between nickel oxide capacity and phosphate (sulfide) capacities exhibit linear correlations, as expected from theoretical equations.

Original language	English
Article number	85
Pages (from-to)	55-59
Number of pages	5
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	33
Issue number	1
DOIs	https://doi.org/10.1007/s11663-002-0085-3
Publication status	Published - 2002

Bibliographical note

Funding Information:
This work was financially supported by the Korea Institute of Geoscience and Mineral Resources (Grant No. 97-LD-01-04-A-01). Also, some of the authors (SHL and JHP) were supported by the Brain Korea 21 Project.

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

Access to Document

10.1007/s11663-002-0085-3

Cite this

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title = "Thermodynamic behavior of nickel in CaO-SiO2-FetO slag",

abstract = "The distribution ratio of nickel between Ag-Ni alloy and CaO-SiO2-FetO slag at high temperatures was measured to clarify the dissolution mechanism of nickel in this melt. Also, the nickel oxide capacity was suggested and was compared to phosphate and sulfide capacities. The dissolution mechanism of nickel into the CaO-SiO2-FetO slags could be described by the following equation from the effect of oxygen potential and slag basicity on nickel dissolution behavior: Ni (1) + 1/2 O2 (g) + O2- (slag) = NiO22- (slag). The nickel oxide capacity increases with increasing CaO/SiO2 ratio at a fixed FetO content. When the ratio of XCaO to XSiO(2) (C/S) is about 1.1 to 1.3, log CNiO(2)(2-) increases with increasing FetO content up to about 35 mol pct, followed by a nearly constant value of CNiO(2)(2-) ≅ 103. In the composition of C/S = 0.5 to 0.7, log CNiO(2)(2-) exhibits a maximum value at about 50 mol pct FetO. From the iso-CNiO(2)(2-) trends in ternary phase diagram, nickel oxide capacity dominantly depends on FetO content in slags; it exhibits a maximum value of CNiO(2)(2-) ≅ 103 at XFe(t)O ≅ 0.5. The relationship between nickel oxide capacity and phosphate (sulfide) capacities exhibit linear correlations, as expected from theoretical equations.",

author = "Lee, {Sang Hoon} and Moon, {Seok Min} and Park, {Joo Hyun} and Min, {Dong Joon}",

note = "Funding Information: This work was financially supported by the Korea Institute of Geoscience and Mineral Resources (Grant No. 97-LD-01-04-A-01). Also, some of the authors (SHL and JHP) were supported by the Brain Korea 21 Project.",

year = "2002",

doi = "10.1007/s11663-002-0085-3",

language = "English",

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AU - Lee, Sang Hoon

AU - Moon, Seok Min

AU - Park, Joo Hyun

AU - Min, Dong Joon

N1 - Funding Information: This work was financially supported by the Korea Institute of Geoscience and Mineral Resources (Grant No. 97-LD-01-04-A-01). Also, some of the authors (SHL and JHP) were supported by the Brain Korea 21 Project.

PY - 2002

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N2 - The distribution ratio of nickel between Ag-Ni alloy and CaO-SiO2-FetO slag at high temperatures was measured to clarify the dissolution mechanism of nickel in this melt. Also, the nickel oxide capacity was suggested and was compared to phosphate and sulfide capacities. The dissolution mechanism of nickel into the CaO-SiO2-FetO slags could be described by the following equation from the effect of oxygen potential and slag basicity on nickel dissolution behavior: Ni (1) + 1/2 O2 (g) + O2- (slag) = NiO22- (slag). The nickel oxide capacity increases with increasing CaO/SiO2 ratio at a fixed FetO content. When the ratio of XCaO to XSiO(2) (C/S) is about 1.1 to 1.3, log CNiO(2)(2-) increases with increasing FetO content up to about 35 mol pct, followed by a nearly constant value of CNiO(2)(2-) ≅ 103. In the composition of C/S = 0.5 to 0.7, log CNiO(2)(2-) exhibits a maximum value at about 50 mol pct FetO. From the iso-CNiO(2)(2-) trends in ternary phase diagram, nickel oxide capacity dominantly depends on FetO content in slags; it exhibits a maximum value of CNiO(2)(2-) ≅ 103 at XFe(t)O ≅ 0.5. The relationship between nickel oxide capacity and phosphate (sulfide) capacities exhibit linear correlations, as expected from theoretical equations.

AB - The distribution ratio of nickel between Ag-Ni alloy and CaO-SiO2-FetO slag at high temperatures was measured to clarify the dissolution mechanism of nickel in this melt. Also, the nickel oxide capacity was suggested and was compared to phosphate and sulfide capacities. The dissolution mechanism of nickel into the CaO-SiO2-FetO slags could be described by the following equation from the effect of oxygen potential and slag basicity on nickel dissolution behavior: Ni (1) + 1/2 O2 (g) + O2- (slag) = NiO22- (slag). The nickel oxide capacity increases with increasing CaO/SiO2 ratio at a fixed FetO content. When the ratio of XCaO to XSiO(2) (C/S) is about 1.1 to 1.3, log CNiO(2)(2-) increases with increasing FetO content up to about 35 mol pct, followed by a nearly constant value of CNiO(2)(2-) ≅ 103. In the composition of C/S = 0.5 to 0.7, log CNiO(2)(2-) exhibits a maximum value at about 50 mol pct FetO. From the iso-CNiO(2)(2-) trends in ternary phase diagram, nickel oxide capacity dominantly depends on FetO content in slags; it exhibits a maximum value of CNiO(2)(2-) ≅ 103 at XFe(t)O ≅ 0.5. The relationship between nickel oxide capacity and phosphate (sulfide) capacities exhibit linear correlations, as expected from theoretical equations.

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