Descaling of Medium C and High Si, Mn

Osei, Richard; Lekakh, Semen Naumovich; O’Malley, Ronald J.; Peterson, Lesli; Sasso, Oldair

doi:10.33313/382/060

Cited by 2 publications

(1 citation statement)

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“…As for the tundish analysis, multiple studies have been carried out to characterize the fluid dynamics varying parameters such as the geometric configuration of the tundish, turbulence inhibitor design, particle dispersion, etc. [26][27][28][29][30][31][32][33] Lecka and Robertson [34,35] carried out a comprehensive study separately for each reactor where the flow pattern of the ladle, tundish, and mold was investigated; however, this generalized approach was used for the analysis of argon injection location in the ladle, tundish design, and mold nozzle port design. From the above, it has been shown that there are no works where the different phenomena are studied in a coupled ladle-shroudtundish system during casting into the mold.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ladle Shroud Blockage on Flow Dynamics and Cleanliness of Steel in Coupled Ladle–Shroud–Tundish System

Ocampo Vaca,

Hernández Bocanegra,

Ramos Banderas

et al. 2024

steel research int.

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Herein, a numerical simulation of the coupled ladle–shroud–tundish system is developed in the emptying stage of the ladle toward the tundish to analyze the effect of the obstruction of the shroud clogging on the fluid dynamics pattern, the thermal behavior, and the removal of inclusions. The thermal stratification of steel in a 150 ton ladle is analyzed during the holding period; subsequently, the ladle emptying to a two‐stranded tundish is carried out considering the average temperature at the end of the holding time, and two considerations are made: the first with the shroud utterly free of obstruction and the second with the shroud partially clogged. Finally, alumina particles are added into the tundish once the quasistable state is reached, and their trajectories are simulated using the discrete‐phase model. The steel temperature during the emptying process is compared against temperature measurements reported by the industrial process, showing a decrease of 0.5 K min−1. The results show that the clogging has little influence on the fluid dynamics structure in the ladle; however, it completely modifies the fluid dynamics and temperature distribution in the tundish, decreasing its efficiency for removing inclusions by up to ≈25% for particles of 10 μm.

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Section: Introductionmentioning

confidence: 99%

Effect of Ladle Shroud Blockage on Flow Dynamics and Cleanliness of Steel in Coupled Ladle–Shroud–Tundish System

Ocampo Vaca,

Hernández Bocanegra,

Ramos Banderas

et al. 2024

steel research int.

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The Effect of Water Jet Overlaps in a Descaler on the Quality of Surface of the Hot Rolled Steel

Pohanka,

Votavová,

Resl

et al. 2023

Metals

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Hot rolling is a highly efficient steel processing method involving the heating and subsequent rolling of semi-finished cast products within mills; however, heating results in the formation of an undesirable, inhomogeneous oxide layer on the surface. Removal of this layer, known as scales, prior to rolling is essential to prevent scales from being rolled into the surface. The scales are removed in the descaler. Most descalers use multiple high-pressure hydraulic descaling nozzles with overlapping sprays. This setting can cause excessive cooling in the overlap area, uneven descaling of the surface, and the presence of residual scales. It can also result in uneven cooling at the finishing line. This study illustrates a typical nozzle configuration commonly used in industrial plants in the hydraulic descaling process and compares its results with a new configuration. The research focuses on examining the overlap area and the washout area of the sprays. The goal is to address the inhomogeneous descaling problem and propose procedures to prevent residual scales. It was shown that one of the problematic areas is the washout area, where the average thickness of the remaining scales was more than four times higher than other descaling areas. Reducing the offset angle has proven to be a good way to eliminate the washout area and achieve a homogeneous descaling process.

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Descaling of Medium C and High Si, Mn

Cited by 2 publications

References 0 publications

Effect of Ladle Shroud Blockage on Flow Dynamics and Cleanliness of Steel in Coupled Ladle–Shroud–Tundish System

Effect of Ladle Shroud Blockage on Flow Dynamics and Cleanliness of Steel in Coupled Ladle–Shroud–Tundish System

The Effect of Water Jet Overlaps in a Descaler on the Quality of Surface of the Hot Rolled Steel

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