(1. 昆明理工大学 省部共建复杂有色金属资源清洁利用国家重点实验室，昆明 650093；
2. 昆明理工大学 冶金与能源工程学院，昆明 650093；
3. 昆明理工大学 冶金节能减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进行浸没燃烧熔池熔炼是发展低碳铜冶炼的重要途径，针对该过程建立生物柴油浸没喷吹燃烧计算模型，计算了喷枪在铜熔体中浸没深度为1 cm时不同氧气体积分数条件下生物柴油浸没燃烧过程及烟气气泡和熔体的运动规律，并实验验证了计算模型。结果表明：生物柴油在熔体内的燃烧过程是间歇的，其燃烧主要集中在与喷嘴相连的气泡内完成，脱离喷嘴的气泡内燃烧现象较弱；计算区域内温度变化分为3个阶段：无规律剧烈变化、温度下降较快、温度缓慢下降；气泡上升轨迹为曲线，上升过程中气泡形状变化依次为球形、椭圆形、扁椭圆形；熔体中线处流动速度较大，近壁面处流动速度较小。
关键字: 生物柴油；浸没燃烧；熔池熔炼；数值模拟；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
