Numerical Simulation Of Multiphase Flow Enhanced Stirring In A New Side-blown Furnac

With the development of the copper smelting industry and the increasing scale of copper mining capacity,the melt pool melting technology is more and more widely used.The stirring effect between the melt and bubble determines the final efficiency of the melting process.In this paper,to address the problem of side-blown furnace largescale,the multi-phase flow enhanced stirring process of oxygen-rich melting side-blown furnace is studied,the multi-phase interface mechanism model of copper oxygen-rich side-blown bath melting is established,the stirring and mixing characteristics of the side-blown bath are obtained,and the non-linear coupling law of different factors on the evolution process of multi-phase flow pattern in the furnace is explored to provide the theoretical calculation basis for the furnace optimization strategy of side-blown furnace large-scale design.This paper establishes the mathematical model of the side-blown melting furnace and verifies the reliability of the numerical simulation by the experimental platform of the side-blown furnace water model and the factorless distance.The flow field characteristics such as gas phase distribution,penetration depth,velocity distribution,and dead zone occupation ratio are used to elucidate the enhanced stirring characteristics of the side-blown lance,and the effects of different lance arrangement methods and side-blown jet gas volume on the gas-slag-copper multiphase mixing in the melt pool are discussed.The results show that: uniform interval has a weaker slag stirring strength and will cause greater stirring speed dead zone,staggered interval although the average speed than the normal blowing conditions have a slight increase,but the stirring dead zone volume is 10 times higher than the normal blowing conditions,the normal way of blowing has a relatively optimal stirring performance.In order to solve the problem of structural adaptability of the side-blown furnace,the innovative slag chamber centering scheme is proposed,and simulations are performed for four different slag chamber layout schemes.Comparing the velocity and turbulent kinetic energy distribution in the furnace,the mid-slag chamber solution can increase the average velocity in the stirred melting zone by 5.2%,the average turbulent kinetic energy by 34% and the average turbulent kinetic energy dissipation rate by 36%,which can better confine the stirring momentum in the stirred melting zone,improve the gas-liquid stirring effect in the melting zone and facilitate the matte-making reaction.On the basis of coupling the optimized blowing system and the new slag discharge scheme,the structure,height and installation position of the slag baffle plate are studied on the influence law of slag matte separation.The optimal slag baffle design is matched,with the bottom of the slag baffle at 0.1 m from the slag matte separation interface,and the location should be 3.04 m from the middle of the molten pool near the slag baffle surface on the gun side.In summary,the mathematical model established in this paper can accurately describe the multi-phase flow intensified mixing process in the oxygen-enriched sideblown furnace,and the simulation results can help optimize the existing side-blown furnace structure,blowing scheme and design parameters,providing a theoretical basis and calculation basis for the popularization and application of copper oxygen-enriched melt pool melting technology.