Due to the high temperature and invisibility of metallurgical furnaces,most measurement methods are limited.Therefore,this paper uses numerical simulation to analyze the flow field and mixing efficiency in the oxygen-rich copper side-blown smelting furnace at high temperature.Affected by buoyancy,the side blown airflow has regional characteristics,mainly stirring the melt directly around the upward trajectory of the airflow.There is a low-speed area in the center of the melt pool,with a speed less than 0.1 m/s.Due to the backflushing of the side blowing airflow,the high-stress area on the wall is concentrated near the nozzle and around the upward path of bubbles.The wall stress in this area is 2-3 times that of the wall stress between adjacent spray guns,making the furnace lining more susceptible to damage.By analyzing the distribution of circulating currents in the molten pool,the molten pool is divided into a high-speed blowing zone and a circulating stirring zone along the axis of the spray gun.The circulating stirring zone is the main reaction zone,with a velocity of less than 1 m/s,but the velocity distribution is more uniform,and the mixing time of the components is 34.10 seconds.The parallel circulation injection technology has the most significant improvement on the mixing efficiency of the molten pool,with turbulent viscosity 1.51 times that of the original operating conditions and a relative reduction of 62.18％in mixing time.
关键词
侧吹炉/气体射流/混合时间/湍流运动/熔炼炉/铜精矿/氧化熔炼/火法冶金
Key words
side blowing furnace/gas jet/mixing time/turbulent motion/smelting furnace/copper concentrate/oxidation smelting/pyrometallurgy
维普
万方数据