scholarly journals Numerical Simulation of Influence of Changing a Dam Height on Liquid Steel Flow and Behaviour of Non-metallic Inclusions in the Tundish

10.5772/23699 ◽  
2011 ◽  
Author(s):  
Adam Cwudzinski
Keyword(s):  
Numerical Simulation ◽  
Liquid Steel ◽  
Metallic Inclusions ◽  
Steel Flow

Numerical Simulation of Behaviour a Non-Metallic Inclusions in an One-Strand Slab Tundish with Steel Flow Controll Devices

2011 ◽  
Vol 56 (3) ◽  
pp. 611-618 ◽  
Author(s):  
A. Cwudziński
Keyword(s):  
Numerical Simulation ◽  
Liquid Steel ◽  
Flow Reactor ◽  
Control Device ◽  
Discrete Phase Model ◽  
Internal Working ◽  
Working Space ◽  
Metallic Inclusions ◽  
Discrete Phase ◽  
Steel Flow

Numerical Simulation of Behaviour a Non-Metallic Inclusions in an One-Strand Slab Tundish with Steel Flow Controll DevicesAn effective refining of liquid steel can be carried out either in a tundish or in the mould of a CSC machine. Being a flow reactor, the tundish performs the function of a link between the steelmaking ladle and the mould. Owing to this fact, the liquid steel resides in the tundish for a specific time, which enables the tundish to be used for refining purposes. For modification oftundish internal working space, two types of flow control device (FCD), namely a ceramic gas-permeable barrier and a subflux turbulence controller (STC), were proposed. For simulation of movement of gas phase and non-metallic inclusions, a discrete phase model was used. The obtained results unambiguously indicate which of the proposed tundish equipment configurations will be more advantageous for intensifying the process of liquid steel refining from NMIs.

scholarly journals Experimental Methods of Validation for Numerical Simulation Results on Steel Flow through Tundish

2016 ◽  
Vol 61 (4) ◽  
pp. 2057-2060
Author(s):  
J. Pieprzyca ◽  
P. Warzecha ◽  
T. Merder ◽  
M. Warzecha
Keyword(s):  
Numerical Simulation ◽  
Liquid Steel ◽  
Flow Distribution ◽  
Physical Modelling ◽  
Simulation Techniques ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Through ◽  
Steel Flow ◽  
Liquid Flows ◽  
The Impact

Abstract The article presents experimental results on the impact of tundish flow regulator influencing the liquid steel flow course. The research was conducted based on the hybrid modelling methods understood as a complementary use of Computational Fluid Dynamics (CFD) methods and physical modelling. Dynamic development of numerical simulation techniques and accessibility to highly advanced and specialized software causes the fact that these techniques are commonly used for solving problems related to liquid flows by using analytical methods. Whereas, physical modelling is an important cognitive tool in the field of empirical identification of these phenomena. This allows for peer review and specification of the researched problems. By exploiting these relationships, a comparison of the obtained results was performed in the form of residence time distribution (RTD) curves and visualization of particular types of liquid steel flow distribution zones in the investigated tundish.

scholarly journals Numerical Modelling of Fluid Flow and Thermal Phenomena in the Tundish of CSC Machine

2014 ◽  
Vol 14 (1) ◽  
pp. 103-106 ◽  
Author(s):  
L. Sowa
Keyword(s):  
Numerical Simulation ◽  
Flow Control ◽  
Liquid Steel ◽  
Metal Flow ◽  
Temperature Fields ◽  
Cast Slab ◽  
Flow Control Devices ◽  
Steel Cast ◽  
Control Devices ◽  
Steel Flow

Abstract The mathematical and numerical simulation model of the liquid steel flow in a tundish is presented in this paper. The problem was treated as a complex and solved by the finite element method. The single-strand slab tundish is used to continuous casting slabs. The internal work space of the tundish was modified by the following flow control devices. The first device was a striker pad situated in the pouring tundish zone. The second device was a baffle with three holes and the third device was a baffle without hole. The main purpose of using these devices was to cause a quiet liquid mixing as well as give directional metal flow upwards which facilitated inclusion floatation. The interaction of flow control devices on hydrodynamic conditions was received from numerical simulation. As a result of the computations carried out, the liquid steel flow and steel temperature fields were obtained. The influence of the tundish modification on velocity fields in the liquid phase of steel was estimated, because these have an essential influence on high quality of a continuous steel cast slab.

scholarly journals Effects of Multiple-Hole Baffle Arrangements on Flow Fields in a Five-Strand Asymmetric Tundish

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5129
Author(s):  
Binglong Zhang ◽  
Fuhai Liu ◽  
Rong Zhu ◽  
Jinfeng Zhu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Residence Time ◽  
Liquid Steel ◽  
Flow Fields ◽  
Average Residence Time ◽  
Injection Angle ◽  
Uniform Rate ◽  
Modelling Experiment ◽  
Steel Flow

This paper reports on the re-engineering of standard five-strand tundish designs into a five-strand asymmetric tundish, which resulted in a non-uniform rate and bias for each strand. We sought to improve the casting conditions by optimizing the liquid steel flow-field in the tundish. Both a water modelling experiment and a numerical simulation were performed to analyze the flow-field according to various diversion hole diameters and injection angles. The results showed that the average residence time decreased as the diameter of the diversion holes increased. As the injection angle was increased, the average residence time initially decreased and then increased. The liquid steel from the ladle shroud rapidly extended to the #2 and #3 strands in the original tundish, which reduced the likelihood of inclusion collision and coalescence.

Thermodynamics Analysis of Non-Metallic Inclusions Formation in the Liquid Steel Flow Through Continuous Casting Tundish

2012 ◽  
Vol 57 (1) ◽  
pp. 277-282 ◽  
Author(s):  
J. Jowsa ◽  
A. Cwudziński
Keyword(s):  
Continuous Casting ◽  
Liquid Steel ◽  
Industrial Plant ◽  
Thermodynamic Evaluation ◽  
Thermodynamics Analysis ◽  
Metallic Inclusions ◽  
Calculation Results ◽  
Flow Through ◽  
Continuous Casting Tundish ◽  
Steel Flow

Thermodynamics Analysis of Non-Metallic Inclusions Formation in the Liquid Steel Flow Through Continuous Casting TundishExperiments were conducted at industrial plant to determine the free and total oxygen contents in molten steel in the tundish during continuous casting blooms of sizes 280×280 mm. On the basis of industrial experiment results a thermodynamic evaluation of non metallic inclusion formation in liquid steel was performed. Software FactSage® with thermodynamic base packages were tested and applied to calculate equilibrium formation of oxides and sulphides. The results showed the effect of oxygen contents and temperature on the formation inclusion in liquid steel. Calculation results was presented in the form of suitable characteristics which were illustrated graphically.

Mathematical Modeling of Behaviour a Liquid Steel Flow and a Non-Metallic Inclusions in the One Strand Wedge Type Tundish with a Subflux Turbulence Controller and a Low Dam

2012 ◽  
Vol 706-709 ◽  
pp. 1379-1384 ◽  
Author(s):  
Adam Cwudziński ◽  
Jan Jowsa
Keyword(s):  
Continuous Casting ◽  
Liquid Steel ◽  
Volume Fraction ◽  
Casting Process ◽  
Balance Model ◽  
Phase Volume Fraction ◽  
Metallic Inclusions ◽  
Rod System ◽  
The One ◽  
Steel Flow

The numerical modelling technique is successfully used for simulation of liquid metal movement and behaviour of non-metallic inclusions in the continuous casting devices. The CFD (Computational Fluid Dynamic) method allows information on physical, chemical and hydrodynamic phenomenon in the metallurgical processes to be obtained. In the continuous steel casting process, where the tundish performs the function of a device batching steel to the mould, the monitoring especially of non-metallic inclusions is very essential because a quantity of non-metallic inclusions in the liquid steel limit the quality of final steel product. The paper presents the results of computing simulation of behaviour a liquid steel flow and non-metallic inclusions in the one-strand tundish with stopper rod system. The subject of simulation was a one-strand tundish of a nominal capacity of 30 tons. The tundish is used in the polish steel mill to process of continuous casting slabs. In the paper authors analysed two tundish i.e. tundish with a low dam and tundish with a subflux turbulence controller and a low dam. The Ansys-Fluent® program was used for solved mathematical model of casting process. The computer simulations were performed for unsteady and nonisothermal conditions. The population balance model was used to description of non-metallic inclusions growth process. As a result of computations, fields of liquid steel flow, fields of secondary phase volume fraction, fields of volume fraction for particular bins and non-metallic inclusions growth curve were obtained.

Numerical Simulation of the Molten Steel Flow in the Tundish of CSC Machine / Symulacja Numeryczna Przepływu Ciekłej Stali W Kadzi Pośredniej Urządzenia COS

2012 ◽  
Vol 57 (4) ◽  
pp. 1163-1169 ◽  
Author(s):  
L. Sowa ◽  
A. Bokota
Keyword(s):  
Numerical Simulation ◽  
Flow Control ◽  
Liquid Steel ◽  
Metal Flow ◽  
Velocity Fields ◽  
Temperature Fields ◽  
Cast Slab ◽  
Flow Control Devices ◽  
Control Devices ◽  
Steel Flow

The mathematical and numerical simulation model of the liquid steel flow in a tundish is presented in this paper. The problem was treated as a complex one. The velocity fields are obtained by solving the momentum equations and the continuity equation, whereas the thermal fields are calculated by solving the conduction equation with the convection term. One takes into consideration in the mathematical model the changes of thermophysical parameters depending on the temperature. The problem was solved by the finite element method. The one-strand slab tundish is used to casting slabs. The internal work space of the tundish was modified by flow control devices. The first device was a striker pad situated in the pouring tundish zone. The second device was a baffle with three holes. The main purpose of using these was to put barriers in the steel flow path as well as give directional metal flow upwards which facilitated inclusion floatation. The visualization of interaction of flow control devices on hydrodynamic conditions was received from numerical simulations. As a result of the computations carried out, the liquid steel flow and steel temperature fields were obtained. The influences of the tundish modifications on the velocity fields in liquid phase of the steel were estimated, because these have essential an influence on high-quality of a continuous steel cast slab.

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