NDLI: Thermodynamic behavior of nickel in CaO-SiO$_{2}$-Fe$

Content Provider	SpringerLink
Author	Lee, Sang Hoon Moon, Seok Min Min, Dong Joon Park, Joo Hyun
Copyright Year	2002
Abstract	The distribution ratio of nickel between Ag-Ni alloy and CaO-SiO$_{2}$-Fe$_{ t }$O 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-SiO$_{2}$-Fe$_{ t }$O slags could be described by the following equation from the effect of oxygen potential and slag basicity on nickel dissolution behavior: $$Ni(1) + \frac{1}{2}O_2 (g) + O^{2 - } (slag) = NiO_2^{2 - } (slag)$$ The nickel oxide capacity increases with increasing CaO/SiO$_{2}$ ratio at a fixed Fe$_{ t }$O 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$_{ t }$O content up to about 35 mol pct, followed by a nearly constant value of $$C_{NiO_2^{2 - } } \cong 10^3 $$ . 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$_{ t }$O. From the iso- $$C_{NiO_2^{2 - } } $$ trends in ternary phase diagram, nickel oxide capacity dominantly depends on Fe$_{ t }$O content in slags; it exhibits a maximum value of $$C_{NiO_2^{2 - } } \cong 10^3 $$ at $$X_{Fe_t O} \cong 0.5$$ . The relationship between nickel oxide capacity and phosphate (sulfide) capacities exhibit linear correlations, as expected from theoretical equations.
Starting Page	55
Ending Page	59
Page Count	5
File Format	PDF
ISSN	10735615
Journal	Metallurgical and Materials Transactions B
Volume Number	33
Issue Number	1
e-ISSN	15431916
Language	English
Publisher	Springer-Verlag
Publisher Date	2002-01-01
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Materials Science Manufacturing, Machines, Tools Metallic Materials Operating Procedures, Materials Treatment Characterization and Evaluation of Materials Numerical and Computational Methods in Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Chemistry Metals and Alloys Condensed Matter Physics

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