Gas–liquid mass transfer and flow phenomena in the Peirce–Smith converter: a water model study
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第1期
论文作者：Xing Zhao Hong-liang Zhao Li-feng Zhang Li-qiang Yang
文章页码：37 - 44
摘 要：A water model with a geometric similarity ratio of 1:5 was developed to investigate the gas-liquid mass transfer and flow characteristics in a Peirce–Smith converter. A gas mixture of CO2 and Ar was injected into a Na OH solution bath. The flow field, volumetric mass transfer coefficient per unit volume（Ak/V; where A is the contact area between phases, V is the volume, and k is the mass transfer coefficient）, and gas utilization ratio（η） were then measured at different gas flow rates and blow angles. The results showed that the flow field could be divided into five regions, i.e., injection, strong loop, weak loop, splashing, and dead zone. Whereas the Ak/V of the bath increased and then decreased with increasing gas flow rate, and η steadily increased. When the converter was rotated clockwise, both Ak/V and η increased. However, the flow condition deteriorated when the gas flow rate and blow angle were drastically increased. Therefore, these parameters must be controlled to optimal conditions. In the proposed model, the optimal gas flow rate and blow angle were 7.5 m3·h-1 and 10°, respectively.
Xing Zhao1,2，Hong-liang Zhao2,3，Li-feng Zhang2,3，Li-qiang Yang2,4
1. Institute of Process Engineering,Chinese Academy of Science2. School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing3. Beijing Key Laboratory of Green Recycling and Extraction of Metal
摘 要：A water model with a geometric similarity ratio of 1:5 was developed to investigate the gas-liquid mass transfer and flow characteristics in a Peirce–Smith converter. A gas mixture of CO2 and Ar was injected into a Na OH solution bath. The flow field, volumetric mass transfer coefficient per unit volume（Ak/V; where A is the contact area between phases, V is the volume, and k is the mass transfer coefficient）, and gas utilization ratio（η） were then measured at different gas flow rates and blow angles. The results showed that the flow field could be divided into five regions, i.e., injection, strong loop, weak loop, splashing, and dead zone. Whereas the Ak/V of the bath increased and then decreased with increasing gas flow rate, and η steadily increased. When the converter was rotated clockwise, both Ak/V and η increased. However, the flow condition deteriorated when the gas flow rate and blow angle were drastically increased. Therefore, these parameters must be controlled to optimal conditions. In the proposed model, the optimal gas flow rate and blow angle were 7.5 m3·h-1 and 10°, respectively.
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