Materials Processing Fundamentals: Poster Session
Sponsored by: TMS Extraction and Processing Division, TMS Materials Processing and Manufacturing Division, TMS: Process Technology and Modeling Committee
Program Organizers: Samuel Wagstaff, Oculatus Consulting; Alexandra Anderson, Gopher Resource; Adrian Sabau, Oak Ridge National Laboratory
Tuesday 5:30 PM
March 21, 2023
Room: Exhibit Hall G
Location: SDCC
N-35: Agglomeration Behavior of Fine Particles Using the Acoustic Wave: Hyo-Soo Lee1; Hai-Joong Lee1; Tae-Hoon Park1; 1Kitech
The fine particles in media such as air and water have been recently caused in the view of environmental pollution. The ultra-fine dusts in air and the fine plastics in water have been challenged to solve with the conventional technology such as filtering, electrostatic etc. We investigated the novel technology for agglomerating the fine particles in air induced by acoustic wave with the frequency ranging from 20Hz to 20kHz and the sound pressure level (SPL) from 0 to 100dB. In this study, the concentration of fine dust was reduced by concentrating fine dust using acoustic wave and sound pressure. Using various acoustic wave and sound pressure conditions, the agglomeration efficiency of fine dust was characterized. The agglomeration behavior of fine particles was studied under the conditions of acoustic wave (Hz) and arbitrary Sound Pressure Level (SPL).
N-17: Analysis of the Thermal Distribution in a Conventional Slab Reheating Furnace Through Mathematical Simulation: Mario Calderon Rojas1; Constantin Alberto Hernandez-Bocanegra2; José Ángel Ramos-Banderas1; Gildardo Solorio-Diaz3; Nancy Lopez-Granados1; 1Instituto Tecnologico de Morelia; 2Catedras CONACYT; 3Universidad Michoacana de San Nicolás de Hidalgo
In this work, the optimal operation of a direct flame walking beam reheating furnace used for conventional steel slabs were sought through numerical simulation. The Navier-Stokes equations, the energy equation, the k-E realizable turbulence model, the species transport equation, and the P-1 thermal radiation model were solved for numerical development. The validation process of this research was based on the thermal histories of 16 thermocouples placed on the walls and roof of the furnace, as well as the nominal power of the burners located in the different zones. The results showed that the reductions in air-methane ratios improved the temperature distribution inside the furnace. Finally, it was found that a 10% decrease in gas consumption in two zones of the furnace does not negatively affect the slab's heating rate and final temperature.
Mathematical Simulation Study on the Effect of Nozzle Side Hole Structure Parameters on the Behavior of Molten Steel in Stainless Steel Mold: Sikun Peng1; Ming-mei Zhu1; Kun-chi Jiang1; Cheng-hong Li1; 1Chongqing University
The influence of structural parameters such as the area and shape of the side hole of the submerged nozzle on the flow behavior of steel and the distribution of liquid slag layer in the mold of large section stainless steel continuous casting slab at high casting speed is studied by combining physical model with mathematical simulation. The results show that with the increase of side hole area, the fluctuation of molten steel level in the mold decreases, the impact depth increases, the flow rate of molten steel decreases, the distribution of liquid slag layer is gradually uniform, and the number of slag entrainment decreases. Compared with the rectangular side hole shape, when the side hole shape is oval, the fluctuation of molten steel level in the mold is reduced, the distribution of liquid slag layer is more uniform, and the number of slag entrainment is reduced. The research results can provide a theoretical basis for designing a reasonable submerged nozzle.
N-18: Numerical Simulation of Thermal Stratification and Fluid Dynamic Behavior of Liquid Steel in an Electric Arc Furnace: Mario Herrera-Ortega1; José Ángel Ramos-Banderas1; Constantin Alberto Hernández-Bocanegra2; Alberto Beltrán-Morales3; Nancy Margarita López-Granados1; Vera Contreras-Vega4; 1TecNM Campus Morelia; 2Cátedras-CONACYT; 3Instituto de Investigaciones en Materiales, UNAM Campus Morelia; 4Universidad Michoacana de San Nicolás de Hidalgo
Computation fluid dynamics simulations were performed to study the thermal stratification and temperature distribution inside an electric arc furnace during flat bath operation. The analysis accounts for the Joule heat generated by the current injected through the graphite electrodes; as well as the thermal losses through both, the bottom surface of the furnace and the cooled side panels. Additionally, the radiative heat transfer is considered. Results indicate that due to Joule heating the bath temperature increases in the center of the furnace. Density difference produces a movement of the bath upward and due to the thermal losses, the bath descends through the furnace walls creating a recirculating convective flow pattern.