Formation of metal pool in current-supplying mould at electroslag process

2019 ◽  
Vol 2019 (4) ◽  
pp. 33-36
Author(s):  
Yu.M. Kuskov ◽  
◽  
T.I. Grishchenko ◽  
Keyword(s):  
Metal Pool

Minimization of Thermal Stresses in Continuously-Cast Ingot with Restriction on its Molten-Metal Pool Volume

1999 ◽  
Vol 30 (4-6) ◽  
pp. 296-302
Author(s):  
F. V. Nedopekin ◽  
Victor K. Tolstykh ◽  
N. A. Volodin ◽  
V. V. Belousov ◽  
S. V. Gridin
Keyword(s):  
Molten Metal ◽  
Thermal Stresses ◽  
Metal Pool ◽  
Cast Ingot ◽  
Continuously Cast ◽  
Molten Metal Pool

Natural Convection Heat Transfer in a Rectangular Liquid Metal Pool With Bottom Heating and Top Cooling

2006 ◽  
Author(s):  
Il S. Lee ◽  
Yong H. Yu ◽  
Hyoung M. Son ◽  
Jin S. Hwang ◽  
Kune Y. Suh
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Liquid Metal ◽  
Convection Heat Transfer ◽  
Bottom Surface ◽  
Natural Convection Heat Transfer ◽  
Metal Pool ◽  
Convection Heat ◽  
Integral System ◽  
Bottom Heating

An experimental study is performed to investigate the natural convection heat transfer characteristics with subcooled coolant to create engineering database for basic applications in a lead alloy cooled reactor. Tests are performed in the ALTOS (Applied Liquid-metal Thermal Operation Study) apparatus as part of MITHOS (Metal Integrated Thermo Hydrodynamic Operation System). A relationship is determined between the Nusselt number Nu and the Rayleigh number Ra in the liquid metal rectangular pool. Results are compared with correlations and experimental data in the literature. Given the similar Ra condition, the present test results for Nu of the liquid metal pool with top subcooling are found to be similar to those predicted by the existing correlations or experiments. The current test results are utilized to develop natural convection heat transfer correlations applicable to low Prandtl number Pr fluids that are heated from below and cooled by the external coolant above. Results from this study are slated to be used in designing BORIS (Battery Optimized Reactor Integral System), a small lead cooled modular fast reactor for deployment at remote sites cycled with MOBIS (Modular Optimized Brayton Integral System) for electricity generation, tied with NAVIS (Naval Application Vessel Integral System) for ship propulsion, joined with THAIS (Thermochemical Hydrogen Acquisition Integral System) for hydrogen production, and coupled with DORIS (Desalination Optimized Reactor Integral System) for seawater desalination. Tests are performed with Wood’s metal (Pb-Bi-Sn-Cd) filling a rectangular pool whose lower surface is heated and upper surface cooled by forced convection of water. The test section is 20 cm long, 11.3 cm high and 15 cm wide. The simulant has a melting temperature of 78°C. The constant temperature and heat flux condition was realized for the bottom heating once the steady state had been met. The test parameters include the heated bottom surface temperature of the liquid metal pool, the input power to the bottom surface of the section, and the coolant temperature.

scholarly journals A Comprehensive Mathematical Model of Electroslag Remelting with Two Series-Connected Electrodes Based on Sequential Coupling Simulation Method

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 658
Author(s):  
Wenjie Tong ◽  
Wanming Li ◽  
Ximin Zang ◽  
Huabing Li ◽  
Zhouhua Jiang ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Molten Metal ◽  
Skin Effect ◽  
Simulation Method ◽  
Melting Rate ◽  
Joule Heat ◽  
Electroslag Remelting ◽  
Metal Pool ◽  
Sequential Coupling ◽  
Molten Metal Pool

A comprehensive mathematical model of electroslag remelting with two series-connected electrodes (TSCE-ESR) was constructed based on sequential coupling method. The influence of droplet effect on electroslag remelting process (ESR) was considered in this model. Compared with one-electrode electroslag remelting (OE-ESR), the multi-physics field, droplet formation and dripping behavior, and molten metal pool structure of TSCE-ESR process were studied. The results show that during the process of TSCE-ESR, the proximity effect of the electrodes suppresses the skin effect, and Joule heat is concentrated in the area between the two electrodes of slag pool, making the temperature distribution of the slag pool more uniform. The heat used to melt the electrode in the process of TSCE-ESR accounts for about 34% of the total Joule heat, which is lower than the OE-ESR (17%). Therefore, it makes a higher melting rate and a smaller droplet size in the process of TSCE-ESR. Compared with OE-ESR, TSCE-ESR process can realize the unification of higher melting rate and shallow flat molten metal pool. Compared with the results without droplet effect, it is found that in the simulation results with droplet effect, the depth and the cylindrical section of molten metal pool increased, and the width of the mushy zone is significantly reduced, which is more consistent with the actual electroslag remelting process.

scholarly journals The Effect of Nanometric α-Al2O3 Addition on Structure and Mechanical Properties of Feal Alloys Fabricated by Lens Technique

2017 ◽  
Vol 62 (3) ◽  
pp. 1703-1712 ◽  
Author(s):  
M. Łazińska ◽  
T. Durejko ◽  
W. Polkowski
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Intermetallic Alloy ◽  
First Principle ◽  
Metal Pool ◽  
Structure And Properties ◽  
Indirect Methods ◽  
Α Al2o3 ◽  
Melted Metal

AbstractResults of the first principle study on a fabrication of FeAl intermetallic based alloy with an addition of nanometric αAl2O3(n-Al2O3) particles by the LENS method and a subsequent characterization of the as received materials’ structure and properties, are shown in the present work. A series of samples were manufactured using LENS technique while a control of temperature and the size of melted metal pool. The presence of ceramics nanoparticles was not directly confirmed by microscopy observations. Neither aluminum nor oxygen content was not elevated in the material with n-Al2O3content. Although, indirect methods revealed influence of n-Al2O3addition on the manufactured elements structure. Analyses of porosity has shown that addition of 2% vol. n-Al2O3significantly decreases this feature (~1%), as compared to the reference material made of pure FeAl intermetallic alloy (~5%). The addition of n-Al2O3causes an increase of grain size in Fe40Al intermetallic alloy. An oxidation resistance has been also improved what was associated to the n-Al2O3addition. Four times lower increase of samples mass was noticed for sample with the n-Al2O3addition as compared to the pure Fe40Al intermetallic alloy.

E-SCAPE: A scale facility for liquid-metal, pool-type reactor thermal hydraulic investigations

2015 ◽  
Vol 290 ◽  
pp. 65-77 ◽  
Author(s):  
Katrien Van Tichelen ◽  
Fabio Mirelli ◽  
Matteo Greco ◽  
Giorgia Viviani
Keyword(s):  
Liquid Metal ◽  
Metal Pool ◽  
Type Reactor ◽  
Pool Type
Sign in / Sign up

Export Citation Format

Share Document