The effect of Nb2O5, CaO/SiO2, and TiO2 on the electrical conductivity of CaO-SiO2-Nb2O5-TiO2-CeO2-CaF2 melt
Source abstract
Abstract
Electrical conductivity is a very important physical parameter in the process of electrolytic extraction of niobium from molten niobium-enriched slag or preparation of ferroniobium alloy by reduction melting separation in electric arc furnace. The effects of Nb 2O 5, CaO/SiO 2 ratio and TiO 2 on the electrical conductivity of CaO-SiO 2-Nb 2O 5-TiO 2-CeO 2-CaF 2 melt were studied by AC four-electrode method. The melt structure was studied by XPS to reveal the change rules of melt conductivity. The results show that the addition of Nb 2O 5 or increasing the CaO/SiO 2 ratio in the melt can depolymerize the melt network structure and effectively improve the melt conductivity, and the activation energy of the conductivity is negatively correlated with the Nb 2O 5 content and the CaO/SiO 2 ratio. With the increase of TiO 2 content in the melt, the melt network structure polymerizes, the melt conductivity decreases, and the activation energy of conductivity also showed a decreasing trend.
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Research context
OpenAlex topics: Metallurgical Processes and Thermodynamics · Extraction and Separation Processes · Molten salt chemistry and electrochemical processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (43)
Show source-provided references
1. Present status and new ideas on utilization of Bayan Obo rare earth and niobium resource
2. Research progress on the extraction of niobium resources in Bayan Obo
3. Smelting Nb-Fe alloy from low and medium grade niobium concentrate by two-step
4. Experimental investigation on the electrochemical extraction of niobium from molten Nb-enriched Slag
5. New opportunities for metals extraction and waste treatment by electrochemical processing in molten salts10.1557/JMR.1995.0487 ↗
6. Production of oxygen gas and liquid metal by electrochemical decomposition of molten iron oxide10.1149/1.3560477 ↗
7. Direct production of Ti-Fe alloy in liquid by electrowinning in molten slag10.2355/isijinternational.51.1762 ↗
8. Research progress of rare earth molten salt electrolysis technology
9. Thermodynamic analysis on selective electrochemical extraction of Nb-bearing from Nb-enriched slag
10. Li · 2013 · 20
11. Methods form measuring electrical conductivity of high temperature molten salts
12. Research progress of low temperature aluminum electrolysis
13. Calculation of voltage balance of rare earth electrolytic cell
14. Smelting low-grade niobium concentrate of Baotou by two-step arc-furnace method: energy equilibrium
15. Wu · 2019 · 10
16. Study on the yield of niobium in the new process of preparing intermediate ferroniobium by two-step reduction method
17. B.W. Li, Y.J. Jiang, Z.W. Zhao, Z.Y. Xu, Recovery and utilization of niobium from low-niobium grade iron ore powder by direct reduction-direct alloying. CN 102212637A, (2011).
18. Properties and structure of niobosilicate glasses10.1016/0022-3093(89)90548-6 ↗
19. Influence of Nb2O5 and basicity on the viscosity and structure of CaO-SiO2-Nb2O5-CeO2-CaF2 slag system10.1051/metal/2020023 ↗
20. Effect of niobium oxide on the structure and properties of melt-derived bioactive glasses10.1111/jace.13222 ↗
21. Spectroscopic and X-ray diffraction investigations into the specific features of crystallization of potassium niobium silicate glasses10.1023/B:GPAC.0000038702.00600.11 ↗
22. Vibrational spectroscopy study of niobium germanosilicate glasses10.1016/j.jnoncrysol.2007.02.018 ↗
23. Influence of niobium and titanium introduction on optical and physical properties of silicate glasses10.1016/j.materresbull.2012.12.004 ↗
24. Study on electrical conductivities of CaO-SiO2-Al2O3 slags10.1179/1879139514Y.0000000174 ↗
25. Electrical and electronic conductivity of CaO-SiO2-FeOx slags at various oxygen potentials: part I. Experimental results10.1007/s11663-006-0084-x ↗
26. Effect of temperature and CaF2-Rich slag's composition on electrical conductivity
27. Influence of TiO2 content on the physical properties of the CaF2-Al2O3-CaO-MgO-TiO2 five yuan electroslag remelting system
28. Effect of partial substitution of Ta2O5 by Nb2O5 on the glass formation, structure and electrical properties of Li2O-Ta2O5-ZrO2-SiO2 glasses10.1016/j.jnoncrysol.2021.121054 ↗
29. Ionic properties of oxygen in slag10.1016/S0022-3093(01)00323-4 ↗
30. High resolution core and valence band XPS spectra of non-conductor pyroxenes10.1016/j.susc.2006.06.012 ↗
31. High resolution O 1s XPS spectral, NMR, and thermodynamic evidence bearing on anionic silicate moieties (units) in PbO-SiO2 and Na2O-SiO2 glasses10.1139/v07-085 ↗
32. Progress on niobium oxide application in glasses
33. The structural effect of niobium in silicate glass
34. Raman spectrum of the high temperature form of Nb2O510.1007/BF00724842 ↗
35. Preparation of Ti2O3 by silicothermic reduction-alkaline leaching method
36. Hydrogen plasma reduced black TiO2-B nanowires for enhanced photoelectrochemical water-splitting10.1016/j.jpowsour.2016.06.074 ↗
37. Strong saturable absorption of black titanium oxide nanoparticle films10.1016/j.apsusc.2017.07.222 ↗
38. Magnéli phases TinO2n-1 as novel ozonation catalysts for effective mineralization of phenol10.1016/j.cjche.2018.01.011 ↗
39. Study of metallurgical properties of medium—Content titania bearing blast furnace slag
40. Effect of composition on viscosity of CaO-Al2O3-SiO2-TiO2-MgO-Na2O system slag
41. Structure of Ti and its effect on property of BaO-SiO2-B2O3-TiO2 system glass
42. Glass formation in the Li2O-TiO2-P2O5, MgO-TiO2-P2O5, and CaO-TiO2-P2O5 systems10.1246/bcsj.51.2559 ↗
43. Effect of TiO2 on the viscosity and slag structure in blast furnace type slags10.1002/srin.201100249 ↗