Rate Enhancement of the Degassing Reaction by the Enlargement of RH and DH Reactors

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

“…In order to reduce costs, many researchers are very concerned about improving the refining efficiency of RH equipment. It is generally considered that the circulation flow rate [5][6][7][8][9][10] and the mixing time [11][12][13][14][15][16] are two significant parameters during the RH process.…”

“…us, many researchers have developed physical [10,11,[17][18][19][20][21] or mathematical models [5,13,[22][23][24][25][26][27] to simulate the multiphase flow [13,22,[26][27][28][29], mixing phenomena [10][11][12][13][14][15][16][28][29][30][31], behavior of bubble and inclusion removal [22,30,32], and decarburization process [1,2,8,20,23,25,33,34] during the RH treatment. Based on the physical simulation experiment work of predecessors on circulation flow rate of RH, some empirical formulas are listed in Table 1, which includes the formulas put forward at the first time and excludes similar equations reported later.…”

“…From equipment improvement view, many investigations have proved that a larger snorkel sectional area [24,26,29,38]blowing from the bottom of the vacuum chamber [15] or ladle [39] would favor to optimize the fluid flow of RH. Recently, many researchers have tried to increase the refining efficiency by using single-leg [12,28,31,40], multilegs [38,41], and magnetic field [42] imposed around the up-leg. However, the single-leg was hardly used in the actual industrial manufacture considering technical immaturity; meanwhile, multilegs and imposing magnetic field around snorkel were also hardly used in the actual industrial manufacture considering the cost issue.…”