<p>Developments in pyrometallurgical zinc smelting have also increased the requirements for the splash condenser. To find the optimal inlet velocity for the splash condenser, a numerical simulation was performed with the computational fluid dynamics and discrete phase model coupled method (CFD–DPM). The aim was to develop the relationship between different inlet velocities and condensation performance. The result shows that inlet velocity influences the condensation process, affecting the Zn vapor condensation efficiency. When the inlet velocity is 0.5&#xa0;m/s or 1.0&#xa0;m/s, the condensation efficiency reaches over 95%. As the inlet velocity increases to 1.5&#xa0;m/s or 2.0&#xa0;m/s, the condensation efficiency reaches 86% and 75%, respectively, which is far from production requirements. Therefore, considering the safety margin and production needs, the optimal inlet velocity for the correspond facility is 1.0&#xa0;m/s. The simulation was validated with the help of flow characteristics and temperature distribution data received from industry thermal test results. This study establishes an industry-validated CFD–DPM framework to quantitatively reveal the velocity-dependent condensation mechanism of Zn vapor in the splash condenser, enabling rational regulation of smelting intensity for high-efficiency zinc recovery. Future studies should extend CFD–DPM modeling toward predictive control of splash condenser performance under dynamic industrial conditions.</p>

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Numerical Simulation on the Relationship Between Inlet Velocity and Splash Condenser Working Performance

  • Su Cao,
  • Aisiaiti Chuluke,
  • Chuncheng Xu,
  • Dejin Qiu,
  • Jie Ren,
  • Yuandong Xiong,
  • Masood Ahmed,
  • Mikko Helle,
  • Yaowei Yu

摘要

Developments in pyrometallurgical zinc smelting have also increased the requirements for the splash condenser. To find the optimal inlet velocity for the splash condenser, a numerical simulation was performed with the computational fluid dynamics and discrete phase model coupled method (CFD–DPM). The aim was to develop the relationship between different inlet velocities and condensation performance. The result shows that inlet velocity influences the condensation process, affecting the Zn vapor condensation efficiency. When the inlet velocity is 0.5 m/s or 1.0 m/s, the condensation efficiency reaches over 95%. As the inlet velocity increases to 1.5 m/s or 2.0 m/s, the condensation efficiency reaches 86% and 75%, respectively, which is far from production requirements. Therefore, considering the safety margin and production needs, the optimal inlet velocity for the correspond facility is 1.0 m/s. The simulation was validated with the help of flow characteristics and temperature distribution data received from industry thermal test results. This study establishes an industry-validated CFD–DPM framework to quantitatively reveal the velocity-dependent condensation mechanism of Zn vapor in the splash condenser, enabling rational regulation of smelting intensity for high-efficiency zinc recovery. Future studies should extend CFD–DPM modeling toward predictive control of splash condenser performance under dynamic industrial conditions.