Physical Modelling Of The Steel Flow In RH Apparatus

Abstract

The efficiency of vacuum steel degassing using RH methods depends on many factors. One of the most important are hydrodynamic processes occurring in the ladle and vacuum chamber. It is always hard and expensive to determine the flow character and the way of steel mixing in industrial unit; thus in this case, methods of physical modelling are applied. The article presents the results of research carried out on the water physical model of RH apparatus concerning the influence of the flux value of inert gas introduced through the suck legs on hydrodynamic conditions of the process. Results of the research have visualization character and are presented graphically as a RTD curves. The main aim of such research is to optimize the industrial vacuum steel degassing process by means of RH method.

Physical Simulation on Molten Steel Flow Characteristics of RH Vacuum Chamber with Arched Snorkels

“…It is widely used for the production of ultralow carbon steels, bearing steels, pipeline steels, spring steels, silicon steels, etc. e RH vacuum steel degassing process depends on sucking the liquid steel from the ladle to the vacuum chamber equipped with two snorkels (up-leg and down-leg) [1]. When the inert gas is blown to the liquid steel, then the circulation flow of steel between vacuum chamber and ladle is forced.…”

“…When the inert gas is blown to the liquid steel, then the circulation flow of steel between vacuum chamber and ladle is forced. e degassing process mainly occurs in liquid internal [1], at splashed metals in vacuum chamber and bubble surfaces [2,3], which involves complex chemical reactions and transport phenomena [4]. us, to improve the degassing and decarburization rate and promote the inclusion removal rate in the RH systems, it is important to illustrate liquid steel flow characteristics.…”

Mixing Phenomenon and Flow Field in Ladle of RH Process

“…Through simulation research, rules can be found out from the complicated process to serve the actual production process. There are many studies on RH vacuum refining process by physical [14][15][16] and numerical [17][18][19][20] model. For example, Li et al [14] studied RH flow and mixing phenomenon and found that mixing time was usually 3 to 4 times of circulation time, and mixing time depends on its positions.…”

Modeling on the Fluid Flow and Mixing Phenomena in a RH Steel Degasser with Oval Down‐Leg Snorkel

“…It is generally considered that the circulation rate and the mixing time are two significant parameters during the RH process. Thus, many researchers have developed physical or mathematical models to simulate the multiphase fluid flow, mixing phenomena, behaviors of bubbles and inclusions, and decarburization process during the RH treatment. Based on previous works on circulation rate of RH, some empirical formulas are listed in Table , which includes the formulas put forward at the first time and excludes similar equations reported later.…”

“…It is generally considered that the circulation rate [5][6][7][8][9][10] and the mixing time [10][11][12][13][14][15][16] are two significant parameters during the RH process. Thus, many researchers have developed physical [13,[17][18][19][20][21] or mathematical models [10,12,[22][23][24][25][26][27] to simulate the multiphase fluid flow, [13,18,22,[26][27][28][29] mixing phenomena, [10][11][12][13][14][15][16][28][29][30][31] behaviors of bubbles and inclusions,` [ 22,30,32] and decarburization process [1,…”