Mathematical Modeling of Iron and Steel Making Processes. Design Optimization of a Single-strand Continuous Caster Tundish Using Residence Time Distribution Data.

Craig, K.J.; Kock, D. J. de; Makgata, K. W.; Wet, G. J. de

doi:10.2355/isijinternational.41.1194

Cited by 28 publications

(20 citation statements)

References 11 publications

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“…Figure 11 below shows the RRI% values for the tundish fitted with the SIP and a 0?08 m high dam. From the results, it is clear that placing the dam closer to 10 the inner SEN (d12) was not good in terms of inclusion content of the liquid coming out of the inner strand. When the low 0?08 m dam was placed closest to the outer SEN (d14), the best results in terms of steel cleanliness were obtained for both the inner and outer SENs.…”

Section: Resultsmentioning

confidence: 89%

Effect of flow modifiers on liquid metal cleanliness in four-strand delta shaped billet caster tundish

Chattopadhyay

Isac

Guthrie

2012

Ironmaking & Steelmaking

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Mathematical modelling was performed on a full scale aqueous model of a delta shaped four-strand billet caster tundish that is in operation at the RTIT (QIT) plant in Sorel-Tracy, Que., Canada. The tundish already uses a large and shallow impact pad designed by the McGill Metals Processing Centre (MMPC) and has proved to be quite successful. In the present study, 12 different combinations of flow modifiers were researched, each of which consisted of the standard impact pad (SIP) and two dams located in between the inner and outer strands. In addition, the size of the SIP was varied in four steps, and its performance was evaluated. The residual ratio of inclusion (RRI) was calculated for all 18 designs, and the best configuration was identified. Mathematically predicted RRI values were verified with existing water model data for a couple of designs.List of symbols C D drag coefficient d p diameter of the particle, m g acceleration due to gravity, m s 22 m p mass of the particle, kg Re Reynolds number u fluid velocity, m s 21 u p particle velocity, m s 21 V p volume of the particle, m 3 m viscosity of the fluid, kg m 21 s 21 r density, kg m 23 SIP standard impact pad SEN submerged entry nozzle

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Section: Resultsmentioning

confidence: 89%

Effect of flow modifiers on liquid metal cleanliness in four-strand delta shaped billet caster tundish

Chattopadhyay

Isac

Guthrie

2012

Ironmaking & Steelmaking

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“…Moreover, continuous development in the field of tundish furniture has generated vast varieties of furniture to choose from. [8][9][10][11][12][13] This increases the complexity in terms of the right choice so as to strike the right tradeoff between tundish performance and cost. Hence, for any new plant set-up, this gives an opportunity for a tailormade solution.…”

Section: Introductionmentioning

confidence: 99%

Single strand continuous caster tundish furniture comparison for optimal performance

Singh¹,

Ajmani

Pal

et al. 2012

Ironmaking & Steelmaking

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Analysis of a single strand 36 t thin slab caster tundish has been conducted with different sets of furniture using a three-dimensional computation fluid dynamics model taking heat losses into account. Five distinct and optimised cases and a base case were used for simulation. The cases were built considering tundish furniture that is readily and economically available and provides ease of maintenance, thus targeting an optimal set of furniture. The performance of different sets of furniture was assessed based on residence time parameters like plug volume fraction, mixed volume fraction, dead volume fraction, etc. Other performance indicators used in the analysis were temperature distribution, observing cold spot, surface velocity and nature of flow in the tundish. Insight from the base case reveals the desired flow characteristics that help to achieve the target performance. Inferred results suggested the use of a turbulence inhibitor in combination with a dam as the optimal set of furniture. Use of a non-isothermal model is important, as it was found that even a small change in temperature (2?3uC) plays a vital role in the fluid flow inside the tundish.

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“…Besides, physical modeling simulation has been widely used to visualize the liquid steel flow in continuous casting tundish and mould,13 especially tundish in recent decades 14, 15. In addition, the stimulus‐response technique and residence time distribution (RTD) curve have been commonly studied 16–21. After tracer was injected into the tundish from the ladle shroud, plotting the concentration of tracer in the tundish exit as a function of time is RTD curve.…”

Section: Introductionmentioning

confidence: 99%

Effects of Salt Tracer Amount, Concentration and Kind on the Fluid Flow Behavior in a Hydrodynamic Model of Continuous Casting Tundish

Chen

Cheng

Sun

et al. 2012

steel research int.

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The hydrodynamic modeling method that widely used to simulate the fluid flow was reconsidered and discussed in this paper. The effects of injected salt tracer amount, concentration and kind on the fluid flow behavior in a hydrodynamic model tundish were investigated. The results were compared with the mathematical modeling calculation results, that the tracer density effect was eliminated. The residence time distribution (RTD) curve of tracer introduced deviated to the left side of the calculated curve, besides the deviation was increased as dimensionless tracer amount (the ratio of tracer amount to hydrodynamic model tundish volume) increased from 0.202 × 10−3 to 1.008 × 10−3. The results of tracer concentration study were similar, namely the deviation was increased with concentration increased; on the other hand, the deformation of a “stair‐shape” RTD curve occurred when tracer concentration was much lower (at dimensionless tracer amount of 0.168 × 10−3 with converting to saturated solution). Besides, the effect of tracer kind on the accuracy of hydrodynamic modeling was also studied; the measurements of KCl solution with lower density than that of NaCl solution exhibited more of accuracy. Finally, the optimized tracer in hydrodynamic model tundish of present work is saturated KCl solution with dimensionless tracer amount of 0.202 × 10−3.

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Mathematical Modeling of Iron and Steel Making Processes. Design Optimization of a Single-strand Continuous Caster Tundish Using Residence Time Distribution Data.

Cited by 28 publications

References 11 publications

Effect of flow modifiers on liquid metal cleanliness in four-strand delta shaped billet caster tundish

Effect of flow modifiers on liquid metal cleanliness in four-strand delta shaped billet caster tundish

Single strand continuous caster tundish furniture comparison for optimal performance

Effects of Salt Tracer Amount, Concentration and Kind on the Fluid Flow Behavior in a Hydrodynamic Model of Continuous Casting Tundish

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