Research on Smelting Vanadium Steel by Silicothermic Reduction Direct Alloying with V2O5

2012 ◽  
Vol 476-478 ◽  
pp. 164-169
Author(s):  
Wei Xiang Wang ◽  
Zheng Liang Xue ◽  
Sheng Qiang Song ◽  
Ping Li ◽  
Zhi Chao Chen
Keyword(s):  
High Temperature ◽  
Thermodynamic Analysis ◽  
Induction Furnace ◽  
Tube Furnace ◽  
Vacuum Induction Furnace ◽  
Medium Frequency ◽  
Carbon Tube ◽  
Silicothermic Reduction ◽  
Direct Alloying

The basic thermodynamic analysis of silicothermic reduction during direct alloying to smelting vanadium steel with V2O5 was discussed in this paper. The high-temperature carbon tube furnace and medium frequency vacuum induction furnace were used to study the phase compositions of the reduction products and the change law of the yield of vanadium when V2O5 was reduced by ferrosilicon. The research shows that the main phases of the silicothermic reduction products were VSi2、FeVO4 and Ca2SiO4 under the condition of using CaO to restrain the volatile of V2O5. Yield of vanadium was gradually improved with the increase of ferrosilicon during the direct alloying. The yield of vanadium in the steel is as high as 95.25% when the addition of ferrosilicon is 35%.

scholarly journals Investigations on the Process of Lead Removal from Cu-Pb Alloys During their Melting in Vacuum Induction Furnace

2017 ◽  
Vol 62 (4) ◽  
pp. 2449-2453 ◽  
Author(s):  
G. Siwiec ◽  
P. Buliński ◽  
M. Palacz ◽  
J. Smołka ◽  
L. Blacha
Keyword(s):  
Thermodynamic Analysis ◽  
Induction Furnace ◽  
Vacuum Induction Melting ◽  
Vacuum Induction Furnace ◽  
Lead Removal ◽  
Induction Melting ◽  
Melting Technology

AbstractThe paper presents analysis and assessment of operating power of vacuum induction furnace in relation to the efficiency of lead removal from Cu-Pb alloy in VIM (vacuum induction melting) technology. Thermodynamic analysis of the process is performed as well.

Removal of Boron from Metallurgical Grade Silicon by Chloride Molten Salt

2013 ◽  
Vol 634-638 ◽  
pp. 3084-3087
Author(s):  
Bin Jie Jia ◽  
Ji Jun Wu ◽  
Wen Hui Ma ◽  
Yan Long Li
Keyword(s):  
Molten Salt ◽  
Thermodynamic Analysis ◽  
Boron Content ◽  
Induction Furnace ◽  
Solar Grade Silicon ◽  
Medium Frequency ◽  
Metallurgical Grade Silicon ◽  
Grade Silicon ◽  
Refining Time ◽  
Boron Chloride

Removal of boron is one of the greatest barriers in the process of upgrading metallurgical grade silicon (MG-Si) to solar grade silicon (SoG-Si). In this work, a chloride molten salt was used as a new refining reagent for removal of boron from MG-Si. The theoretical supporting for chloride molten salt refining was studied by the thermodynamic analysis at first, which testified that boron could be volatilized and removed from MG-Si melt by generating the gaseous boron chloride species. Then the experiments for the removal of boron were carried out using the chloride molten salt with the different conditions of refining time and the ratio of chloride molten salt to MG-Si. The results showed that the boron content in refined silicon was successfully reduced from 22.0×10-6 to 3.0×10-6 in a medium frequency induction furnace at 1695 K for 2h.

Various Properties of Dual-Phase Intermetallic Compound in Ni-Al System

2010 ◽  
Vol 638-642 ◽  
pp. 1348-1352
Author(s):  
Yoshitaka Iwabuchi ◽  
Isao Kobayashi
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Intermetallic Compound ◽  
Induction Furnace ◽  
Vacuum Induction Furnace ◽  
High Temperature Strength ◽  
Dual Phase ◽  
Ni Content ◽  
Phase Intermetallic ◽  
Oxidation Resistant

NiAl possesses the superior oxidation resistant and Ni3Al shows the good high temperature strength. Various castings with NiAl and Ni3Al were used in order to investigate the influence of Ni content on the properties. The heats were made by using vacuum induction furnace and its properties were evaluated. This article described the density, hardness, oxidation resistance, corrosion resistance and compression strength of the castings in comparison of other structural materials.

A High-Temperature Vacuum Induction Furnace

1951 ◽  
Vol 34 (5) ◽  
pp. 161-163 ◽  
Author(s):  
HAROLD T. SMYTH ◽  
ROBERT H. MEINKEN ◽  
LEONARD G. WISNYI
Keyword(s):  
High Temperature ◽  
Induction Furnace ◽  
Vacuum Induction Furnace

Effect of Two Kinds of Refiners on the Solidification Structure and Property of Invar Alloy

2013 ◽  
Vol 32 (4) ◽  
pp. 375-381
Author(s):  
Hong-guang Zheng ◽  
Li-jiang Yao ◽  
Heng Xu
Keyword(s):  
Grain Size ◽  
Room Temperature ◽  
Induction Furnace ◽  
Solidification Structure ◽  
Invar Alloy ◽  
Vacuum Induction Furnace ◽  
Structure And Property ◽  
Carbon Tube ◽  
Equiaxed Grains ◽  
Equiaxed Grain

AbstractThe solidification structure of two 500 g cylindrical ingots of Fe-36Ni invar alloy, which were melted in a carbon tube furnace and cast adding Ce and Zr-Ti refiners respectively, were investigated. The results showed that the grain size became smaller. With the increase of refiner content, the ratio of equiaxed grains of ingot increased and the equiaxed grain size decreased. As for the 100 kg flat ingot, which was melted in a vacuum induction furnace and cast with Ce and Zr-Ti refiners respectively, the situation was different slightly. When adding Ce the dendritic grain diameter of the flat ingot became finer and the equiaxed grain ratio remained low; however, the mechanical property deteriorated. While adding Zr-Ti complex refiners, the solidification structure of the alloy was improved dramatically. Therefore, the mechanical properties at room temperature of as-cast flat ingots were improved. Furthermore, its high temperature ductility range expanded and the expansion coefficient of its hot-rolling plate remained almost the same.

A high-temperature vacuum induction furnace

Vacuum ◽  
1952 ◽  
Vol 2 (1) ◽  
pp. 93
Author(s):  
H.T. Smyth ◽  
R.H. Meinken ◽  
L.G. Wisnyi
Keyword(s):  
High Temperature ◽  
Induction Furnace ◽  
Vacuum Induction Furnace

Theoretical analysis and experiments for the carburization of vanadium-bearing hot metal

2018 ◽  
Vol 115 (2) ◽  
pp. 204
Author(s):  
Deng Ma ◽  
Wei Wu ◽  
Shifan Dai ◽  
Zhibin Liu
Keyword(s):  
Theoretical Analysis ◽  
Thermodynamic Analysis ◽  
Induction Furnace ◽  
Cost Effective ◽  
Pilot Scale ◽  
Hot Metal ◽  
Temperature Range ◽  
Vanadium Extraction ◽  
Low Nitrogen

In this study, the feasibility of the carburization of vanadium-bearing hot metal was first investigated by thermodynamic analysis. Next, three carburizers, namely a low-nitrogen carburizer, anthracite, and coke, were used for carburization of 500 g of vanadium-bearing hot metal at 1450 °C, 1500 °C, and 1550 °C, respectively. The carbon increments for the low-nitrogen carburizer, anthracite and coke followed decreasing order in the temperature range from 1450 °C to 1550 °C. Anthracite was the most cost-effective carburizer. Hence, anthracite is used in pilot-scale experiments of the vanadium-bearing hot metal (100 kg and 200 kg). Finally, vanadium extraction experiments of the vanadium-bearing hot metal were carried out in a top-bottom-combined blowing induction furnace. It is proved that the average superheat degree of semi-steel increases from 100 °C to 198 °C by the carburization of vanadium-containing hot metal.

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