Study on the liquid metal flow field in FC-mold of slab continuous casting

The flow state and velocity distribution of liquid metal in the FC-Mold and the influence rules by the magnetic flux density have been investigated when electromagnetic brake adopted, applying mercury as medium to simulate molten steel in the continuous casting process. The velocity measurement has been completed by the Ultrasonic Doppler Velocimeter (UDV) under various magnetic distribution and the influence laws of magnetic flux density on the liquid metal flow in the mold has been analyzed. The experimental results indicate that, when the upper and lower magnetic flux density is 0.18T and 0.5T respectively, a preferable control effect can be obtained, not only the free surface fluctuation can be compressed, but also a plug flow can be rapidly formed.

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Role of the Continuous Casting Forms on the Shape of the Solidified Crust / Wpływ Geometrii Formy Na Kształt Frontu Krzepnięcia Przy Odlewaniu Ciągłym

Archives of Metallurgy and Materials ◽

10.1515/amm-2015-0413 ◽

2015 ◽

Vol 60 (4) ◽

pp. 2553-2558

Author(s):

Z. Lipnicki ◽

K. Pantoł

Keyword(s):

Liquid Metal ◽

Continuous Casting ◽

Analytical Model ◽

Thin Plate ◽

Solidification Front ◽

Metal Flow ◽

Axial Direction ◽

Thickness Profile ◽

Liquid Metal Flow

An analytical model for the transfer has been development and applied for calculating the shape of the solid thickness profile for continuous casting of a thin plate as an example. The stationary solidification front relative to the crystallizer was received from the superposition of the motions of the liquid metal flow in the axial direction and the solidifying metal in the perpendicular direction. The shape of the solidified crust was analyzed for different casting forms. The results are compared and graphically shown for different selected forms.

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Phase-Field Simulation Studies of Dendrite Growth Coupling with Force Flow Field

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1004-1005.1069 ◽

2014 ◽

Vol 1004-1005 ◽

pp. 1069-1075

Author(s):

Li Feng ◽

Chang Sheng Zhu ◽

Yang Lu ◽

Zhi Ping Wang ◽

Ling Min An

Keyword(s):

Liquid Metal ◽

Flow Field ◽

Forced Convection ◽

Phase Field ◽

Metal Flow ◽

Dendrite Growth ◽

Dendrite Morphology ◽

Liquid Metal Flow ◽

Growth Phenomenon ◽

Double Grid

Coupling the force flow field with the phase field model for the isothermal growth of dendrite, Sola algorithm is used to calculate the flow speed and pressure of liquid metal, Using double grid numerical method to reduce the calculation amount of computer simulation, The space factor and time factor are introduced to improve the accuracy of double grid numerical calculation, Taking Al-2%-Cu alloy as an example, the dendrite growth process of the binary alloy under forced convection environment is simulated; The simulation results can capture the real dendrite growth and interactions of the liquid metal flow in the process of dendrite growth under forced convection environment: In the incident flow regions, the dendrite morphology is complex, the secondary dendrite is lush and the growth speed is fast due to the influence of liquid metal flow. In the back flow regions, the growth of dendrite changes the flowing pressure among the liquid metals, it causes the regional complex flow patterns and there are two opposite eddy current; the grow speed of the main branch which grows perpendicular to the initial flow direction is the fastest and presents tilt growth phenomenon. When the space coefficient value is appropriate, the dual mesh method can save calculation time effectively.

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A New Criterion for Optimization the Intermittently Reversing Direction Electromagnetic Stirring in Round Strands Continuous Casting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.785-786.1095 ◽

2013 ◽

Vol 785-786 ◽

pp. 1095-1098

Author(s):

Zuo Sheng Lei ◽

Xiao Hua Yang ◽

Ru Jun Wei ◽

Qi Gao

Keyword(s):

Magnetic Field ◽

Liquid Metal ◽

Continuous Casting ◽

Physical Simulation ◽

Dynamic Pressure ◽

Metal Flow ◽

Electromagnetic Stirring ◽

Doppler Velocity ◽

Time Interval ◽

Liquid Metal Flow

Liquid metal flow behavior in round strands continuous casting under intermittently reversing direction electromagnetic stirring was measured by ultrasonic Doppler velocity-meter in a physical simulation system in order to investigate the effects of time interval () of periodically reversed magnetic field on the spatial and temporal flow. The results show that under electromagnetic stirring with direction reserved magnetic field, theres a periodically change of the metal flow velocity and rotation direction with the periodically direction changing of the magnetic field. From both the experimental and mathematical model calculation results, it is found that when is nearly equal to the time required for the metal flow speeding to the maximum velocity from still and decreases to zero again, there is a critical value of the rate of dynamic pressure, which means the wash effect of the liquid metal flow. On this point, rate of dynamic pressure was proposed to be a criterion for optimization the processing of electromagnetic stirring.

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