Zhao Yan, Wen Liangying, Liu Bo, Su Li, Hu Meilong, Zhang Shengfu, Wang Jianxin
School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials, Chongqing University, Chongqing 400044, China.
ACS Omega. 2023 May 24;8(22):19433-19442. doi: 10.1021/acsomega.3c00612. eCollection 2023 Jun 6.
The interfacial behaviors of the droplet impact on a heated extracted titanium tailing surface are studied experimentally. The effects of surface temperatures and Weber numbers on the droplet spreading characteristics are examined. The factors affecting the mass fraction and dechlorination ratio of extracted titanium tailings under the action of interfacial behavior have been researched by thermogravimetric analysis. The compositions and microstructures of extracted titanium tailings are characterized using X-ray fluorescence spectroscopy and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS). The interfacial behaviors on the extracted titanium tailing surface are classified into four regimes, i.e., boiling-induced break-up, advancing recoiling, splash with a continuous liquid film, and splash with a broken film. The maximum spreading factors increase with the surface temperature and the Weber number. It is found that the surface temperature has a dominant influence on the spreading factors and interfacial effect, further affecting its chlorination reaction. SEM-EDS analysis revealed that the extracted titanium tailing particles are irregular shaped. There are some fine pores on the surface after the reaction. The main concentrations are Si, Al, and Ca oxides with a certain amount of C elements. The findings of this research provide a new pathway to utilize the extracted titanium tailings comprehensively.
实验研究了液滴冲击加热后的提取钛尾矿表面的界面行为。考察了表面温度和韦伯数对液滴铺展特性的影响。通过热重分析研究了界面行为作用下影响提取钛尾矿质量分数和脱氯率的因素。利用X射线荧光光谱和扫描电子显微镜-能谱仪（SEM-EDS）对提取钛尾矿的组成和微观结构进行了表征。提取钛尾矿表面的界面行为分为四种状态，即沸腾破碎、前进反冲、带连续液膜的飞溅和带破碎液膜的飞溅。最大铺展因子随表面温度和韦伯数的增加而增大。研究发现，表面温度对铺展因子和界面效应有主导影响，进而影响其氯化反应。SEM-EDS分析表明，提取的钛尾矿颗粒形状不规则。反应后表面有一些细孔。主要成分是Si、Al和Ca的氧化物以及一定量的C元素。本研究结果为综合利用提取钛尾矿提供了一条新途径。
