Mixing and interface mass transfer characteristics of electric arc furnace melt pool with composite stirring process
The lack of C-O reaction during the entire scrap steel arc furnace smelting process,coupled with the shal-low dish shape of the melt pool,low stirring intensity of a single stirring method,and poor reaction kinetics condi-tions,are one of the main reasons that restrict the efficient smelting of the arc furnace.In order to improve the dy-namic conditions in the molten pool during the arc furnace smelting process and improve smelting efficiency,physical simulation methods are used to study the flow field characteristics formed by a single stirring method.Based on this,further exploration was conducted on the mixing and interface mass transfer characteristics of the molten pool under different composite stirring combinations,and the optimal composite stirring method was explored.The research re-sults indicate that the flow field formed by oxygen jet and side blowing is similar,mainly distributed in the upper and middle upper parts of the molten pool,and composite stirring cannot eliminate the weak stirring zone formed by sin-gle stirring.The entire molten pool is penetrated by the flow field from bottom blowing,but there are still weak stirring areas far from the center and bottom of the stream.Combined jet stirring the stirring effect can be greatly improved,with an average mixing time of 53-86 s.Adding a side blowing nozzle to the dead zone of jet and bottom blowing composite mixing,the stirring effect of the melt pool can be further strengthened,with an average mixing time of 31-68 s much lower than that of binary stirring.However,the effect of mixing inside the melt pool and the mass transfer at the steel slag interface is the different or even the opposite.Combining metallurgical effects under the"ternary"stirring conditions,the best comprehensive metallurgical effect is performed in groups 1 and 5.
electric arc furnacewater simulationcomposite stirringmixing timemass transfer rate
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