Numerical simulations and industrial experiments of liquid steel alloying process in one strand slab tundish

Abstract

The present paper discusses the results of tests in which batches of nickel in the form of crowns were introduced to liquid steel in a continuous casting slab tundish during experiments to investigate steel alloying during casting. Suction liquid steel samples taken from both tundish and mould were assayed for chemical composition. Computer simulations of liquid steel flow and alloy addition behaviour were performed using the commercial program Ansys-Fluent. Owing to the complexity of alloy dissolution and dispersion in metallurgical processes, a decision was made to use the Species Model. The obtained fields of liquid steel flow and nickel distribution and the curves of nickel concentration in time constitute a source of information about the dynamics and complexity of the steel alloying process during continuous steel casting. The present studies show influence of different addition positions and different flow control devices on liquid steel chemical homogenisation process.

Numerical and Physical Study on New Simple Design of Subflux Flow Controller for One-Strand Tundish

“…Properties of liquid steel were presented in the author’s previous work [ 40 ]. The author’s previous work on general liquid steel properties and steel flow were compared with industry liquid steel behavior with quite good conformity [ 44 ]. In this work, liquid steel grade was characterized by average content of carbon 0.16 wt.%, manganese 1.36 wt.% and silicon 0.26 wt.%.…”

Hydrodynamic effects created by argon stirring liquid steel in a one-strand tundish

“…For generating the computational grids, Gambit program was used. The numerical model and the physicochemical quantities for the liquid steel and argon are described in detail in the work [17]. For describing the turbulence motion of liquid steel and argon, the realisable k-ε model was adopted.…”

Loss mechanism of micro-carbon ferromanganese during RH refining

“…The motion trajectory of ferroalloy after the addition into molten steel also has influences on its loss and yield [9,10]. Rodríguez-Avila et al [11] established a numerical-multiphase fluid flow model and studied the dynamics of alloy additions during steel tapping operations.…”