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<p>A 7.5:1 cold water experimental model was constructed by geometrically scaling down a copper side-blown smelting furnace. The gas flow stability of the swirl nozzle at different gas flow rates and swirl angles were analyzed. An experimental method of high-speed camera—digital image processing—statistical was used. The results indicate that the side-blown bubbles under the swirl nozzle are still bubbly. Due to the traction of the rising bubble wake, bubble shape transitions between the large bubble and bubble column, resulting in better stability and continuity than those of straight pipe nozzles. Therefore, regarding temporal evolutions of penetration depth and gas flow root radius, full width at half maxima and frequency have decreased and increased, respectively, and averages are greater. The optimal swirl angle is 12&#xa0;deg. All gas flow penetration depths increase linearly with gas flow rate. The gas flow root radius increases nonlinearly with the gas flow rate, following a cubic polynomial relationship. Under the acceleration effect of the pressure nozzle, the gas flow pattern transforms into jet, and all penetration characteristics are improved.</p>

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Water Model Experiments on the Gas Flow Stability of Swirl Nozzles in a Copper Side-Blown Smelting Furnace

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Yadong Xiao,
  • Yan Liu,
  • Tingan Zhang,
  • Xiang Li,
  • Kun Wang

摘要

A 7.5:1 cold water experimental model was constructed by geometrically scaling down a copper side-blown smelting furnace. The gas flow stability of the swirl nozzle at different gas flow rates and swirl angles were analyzed. An experimental method of high-speed camera—digital image processing—statistical was used. The results indicate that the side-blown bubbles under the swirl nozzle are still bubbly. Due to the traction of the rising bubble wake, bubble shape transitions between the large bubble and bubble column, resulting in better stability and continuity than those of straight pipe nozzles. Therefore, regarding temporal evolutions of penetration depth and gas flow root radius, full width at half maxima and frequency have decreased and increased, respectively, and averages are greater. The optimal swirl angle is 12 deg. All gas flow penetration depths increase linearly with gas flow rate. The gas flow root radius increases nonlinearly with the gas flow rate, following a cubic polynomial relationship. Under the acceleration effect of the pressure nozzle, the gas flow pattern transforms into jet, and all penetration characteristics are improved.