(1. 中南大学 冶金与环境学院,长沙 410083;
2. 中南大学 中国有色金属工业清洁冶金工程研究中心,长沙 410083;
3. 中南大学 资源加工与生物工程学院,长沙 410083)
摘 要: 在氧气底吹熔炼过程中,合理的氧枪枪位是获得良好熔炼效果的重要因素。分别对氧气底吹炉对心异侧(Ⅰ)、对心同侧(Ⅱ)、非对心同侧(Ⅲ) 3种不同氧枪枪位布置方式进行数值模拟,研究(Ⅰ)、(Ⅱ)、(Ⅲ) 3种方式对熔池气液两相分布、熔体喷溅高度、熔池气含率、熔池速度场和熔池流线分布等影响。结果表明:相比于(Ⅰ)、(Ⅱ) 2种方式,(Ⅲ)方式下熔体喷溅高度低,熔池波动平稳,熔池平均气含率高且烟气烟尘率低,是一种适宜的氧枪枪位布置方式,对解决生产过程熔体喷溅、炉体腐蚀严重和烟尘率高等问题有积极作用。
关键字: 底吹熔炼;氧枪枪位;数值模拟;气含率;流线分布
(1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. Cleaner Metallurgical Engineering Research Center, Nonferrous Metal Industry of China, Changsha 410083, China;
3. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China)
Abstract:During oxygen bottom blown smelting process, a reasonable oxygen lance layout is an important factor to obtain a better smelting effect. Three oxygen lance layouts of oxygen bottom blown furnace such as the central opposite side (Ⅰ), central same side (Ⅱ) and non-central same side (Ⅲ) were simulated. The influences of (Ⅰ), (Ⅱ) and (Ⅲ) ways on the gas-liquid phase distribution, melt splash height, gas volume fraction, bath velocity field and the streamline distribution of furnace were researched, respectively. The results show that, comparing with (Ⅰ) and (Ⅱ) ways, the melt splash height is lower and the bath fluctuates most smoothly in the (Ⅲ) way. Besides, the gas volume fraction of the bath in the (Ⅲ) way is the highest and the dust rate is low. The (Ⅲ) way is a suitable oxygen lance layout for oxygen bottom blown smelting process and has a positive effect for solving the melt splashing, furnace body erosion and high dust rate problems.
Key words: oxygen bottom blown smelting; oxygen lance layout; numerical simulation; gas volume fraction; streamline distribution