| 机械振动辅助Bi2O3-ZnO-B2O3三元玻璃料浆均匀化机理 |
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| 引用本文： | 刘静冉,李要辉,黄小婷,刘益伦.机械振动辅助Bi2O3-ZnO-B2O3三元玻璃料浆均匀化机理[J].化工进展,2020,39(z1):26-32. |
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| 作者姓名： | 刘静冉 李要辉 黄小婷 刘益伦 |
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| 作者单位： | 1.西安交通大学机械结构强度与振动国家重点实验室，陕西 西安 710049;2.中国建筑材料科学研究总院，北京 100024 |
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| 摘 要： | 通过数值模拟研究了机械振动下Bi2O3-ZnO-B2O3三元玻璃料浆的混合过程，并分析了混合均匀化机理。首先，利用旋转黏度计分别测量了Bi2O3、ZnO及B2O3三种玻璃料浆的黏度，并用光学显微镜分别观察三种玻璃料浆的粒度，通过Stokes-Einstein方程得到流体料浆的扩散系数。在此基础上建立了机械振动下Bi2O3-ZnO-B2O3三元玻璃料浆混合过程的Fluent模型，定义了描述三元料浆混合均匀程度的混合偏差。通过模拟研究发现：①增加容器振幅及频率均能加快三元料浆的混合；②机械振动的振幅及频率不宜过高，否则会导致料浆溢出容器；③混合偏差随时间增加而降低，可以通过幂函数描述，从而可以预测不同振幅和频率下Bi2O3-ZnO-B2O3三元玻璃料浆的混合均化时间。指出选择合适的振幅及频率，有助于提高混合效率，并避免料浆溢出容器。
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| 关 键 词： | 铋锌硼三元玻璃料浆 数值模拟 混合过程 均匀化机理 |
| 收稿时间： | 2019-10-16 |
Mechanical vibration assisted homogenization mechanism of Bi2O3-ZnO-B2O3 ternary glass slurry |
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| LIU Jingran,LI Yaohui,HUANG Xiaoting,LIU Yilun.Mechanical vibration assisted homogenization mechanism of Bi2O3-ZnO-B2O3 ternary glass slurry[J].Chemical Industry and Engineering Progress,2020,39(z1):26-32. |
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| Authors: | LIU Jingran LI Yaohui HUANG Xiaoting LIU Yilun |
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| Affiliation: | 1.State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
2.China Building Materials Academy, Beijing 100024, China |
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| Abstract: | In this work, the mixing process and homogenization mechanism of Bi2O-ZnO-B2O3 ternary glass slurry under mechanical excitation were numerically studied. Firstly, the dynamic viscosity of Bi2O3, ZnO and B2O3 glass slurries were measured by rotating viscometer and the particle sizes were measured by optical microscope. The diffusion coefficient of the slurries were obtained by Stokes-Einstein equation. Then, the simulation model for the mixing process of Bi2O3-ZnO-B2O3 ternary glass slurry under mechanical vibration is established by Fluent software, and the mixing deviation describing the mixing uniformity of ternary glass slurry is defined. The numerical results show that the increase of the amplitude and frequency of the container both accelerate the mixing of ternary slurry. The exciting amplitude and frequency should not be two large, otherwise, the slurries would overflow the container. Additionally, mixing deviation decreases with the increase of exciting time, which can be described by power function, so that the time required to mix uniformly for Bi2O3-ZnO-B2O3 ternary glass slurry under different amplitudes and frequencies can be predicted. Appropriate amplitudes and frequencies are helpful to improve mixing efficiency and avoid slurry overflowing the container. |
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| Keywords: | bismuth-zinc-boron ternary glass slurry numerical simulation mixing process homogenization mechanism |
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