Numerical Simulation of Melting Kinetics of Metal Particles during Tapping with Argon-Bottom Stirring

Crystals

Kinnor Chattopadhyay¹  Jafeth Rodríguez-Ávila²  CarlosRodrigo Muñiz-Valdés²  Rodolfo Morales-Davila³  Alfonso Nájera-Bastida⁴ 

[1] Department of Materials Science and Engineering, University of Toronto, 184 College Street, Suite 140, Toronto, ON M5S 3E4, Canada;Facultad de Ingeniería, Universidad Autónoma de Coahuila, Blvd. Fundadores Km 13, Ciudad Universitaria, Arteaga Coahuila25350, Mexico;Instituto Politécnico Nacional-ESIQIE, Department of Metallurgy, Ed. 7 Zacatenco, México City07738, Mexico;Instituto Politécnico Nacional-UPIIZ, Metallurgy Engineering, Blvd. del Bote 202, Cerro del Gato, Zacatecas98160, Mexico;

关键词: ladle;    argon stirring;    tapping;    particle melting;    alloying;   

DOI  :  10.3390/cryst10100901

来源: DOAJ

【 摘 要 】

Molten steel is alloyed during tapping from the melting furnace to the argon-bottom stirred ladle. The metallic additions thrown to the ladle during the ladle filling time are at room temperature. The melting rates or kinetics of sinking-metals, like nickel, are simulated through a multiphase Euler–Lagrangian mathematical model during this operation. The melting rate of a metallic particle depends on its trajectory within regions of the melt with high or low turbulence levels, delaying or speeding up their melting process. At low steel levels in the ladle, the melting rates are higher on the opposite side of the plume zone induced by the bottom gas stirring. This effect is due to its deviation after the impact of the impinging jet on the ladle bottom. The higher melting kinetics are located on both sides at high steel levels due to the more extensive recirculation flows formed in taller baths. Making the additions above the eye of the argon plume spout increases the melting rate of nickel particles. The increase of the superheat makes the heat flux more significant from the melt to the particle, increasing its melting rate. At higher superheats, the melting kinetics become less dependent on the fluid dynamics of the melt.

【 授权许可】

Unknown