(1. 昆明理工大學 省部共建復雜有色金屬資源清潔利用國家重點實驗室，昆明 650093；
2. 昆明理工大學 冶金與能源工程學院，昆明 650093；
3. 昆明理工大學 冶金節(jié)能減排教育部工程研究中心，昆明 650093)
摘 要: 以生物柴油替代化石柴油進行浸沒燃燒熔池熔煉是發(fā)展低碳銅冶煉的重要途徑，針對該過程建立生物柴油浸沒噴吹燃燒計算模型，計算了噴槍在銅熔體中浸沒深度為1 cm時不同氧氣體積分數(shù)條件下生物柴油浸沒燃燒過程及煙氣氣泡和熔體的運動規(guī)律，并實驗驗證了計算模型。結果表明：生物柴油在熔體內(nèi)的燃燒過程是間歇的，其燃燒主要集中在與噴嘴相連的氣泡內(nèi)完成，脫離噴嘴的氣泡內(nèi)燃燒現(xiàn)象較弱；計算區(qū)域內(nèi)溫度變化分為3個階段：無規(guī)律劇烈變化、溫度下降較快、溫度緩慢下降；氣泡上升軌跡為曲線，上升過程中氣泡形狀變化依次為球形、橢圓形、扁橢圓形；熔體中線處流動速度較大，近壁面處流動速度較小。
關鍵字: 生物柴油；浸沒燃燒；熔池熔煉；數(shù)值模擬；低碳冶金
（1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,
Kunming University of Science and Technology, Kunming 650093, China;
2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
3. Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, China）
Abstract:It is an important way to develop the low-carbon metallurgy with biodiesel instead of fossil diesel in copper bath smelting process. A simulation model of biodiesel submerged blowing process was established. The biodiesel submerged combustion process, the motion of gas bubble and copper-matte were simulated under different O2 volume fractions when the submerged depth of the spray nozzle is 1 cm. The simulation model was verified by experiment. The results show that the submerged combustion process of biodiesel is intermittent, this process is mainly done within bubble which is connected to the nozzle, the combustion is weaker after the bubble depart from the nozzle. The temperature changed in the bath is divided into three stages, first irregular drastic stage, then rapid decrease stage, and finally gradually decrease stage. The rising trajectory of the bubble is a curve, and the shape of the bubble changes from spherical to elliptical and finally oblate. The liquid velocity is larger in the axis area and lesser in the near wall area.
Key words: biodiesel; submerged combustion; bath smelting; numerical simulation; low-carbon metallurgy
