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Ring formationRing formation in the rotary kilnRotary kilns decreases the performance and productivity of the pelletPellet ore. Inhibiting the formation of the ring contributes to improving pellet qualityPellet quality and stabilizing production. Previous research has been conducted on the rotary kilnRotary kilns's ring formationRing formation and the impact of the raw materials. However, the role played by alkali metalAlkali metals impurities in the process of ring formationRing formation has not been investigated. In this study, the actual ring was analyzed and thermodynamicThermodynamics calculations were adopted to explore the origins of alkali metalsAlkali metals and their effect on ring formationRing formation in the rotary kilnRotary kilns. It is concluded that alkali metalsAlkali metals entered the liquid phase and achieved enrichment through formatting aluminosilicateAluminosilicate. When the temperatureTemperature exceeded 1200 °C, the liquid phase generation of coal ash with high alkali metalAlkali metals content reached 22.78%. Reducing the amount of coal ash in the kiln can effectively suppress ring formationRing formation.

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The Effect of Alkali Metals on Ring Formation in the Pellet Rotary Kilns

  • 会议论文

  • 发表日期：

    2025年

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  • Qiuyu Li,
  • Yuanbo Zhang,
  • Zijian Su,
  • Nanyong Wu,
  • Fang Chen,
  • Xiaoguang Bai,
  • Guowei Fu

摘要

Ring formationRing formation in the rotary kilnRotary kilns decreases the performance and productivity of the pelletPellet ore. Inhibiting the formation of the ring contributes to improving pellet qualityPellet quality and stabilizing production. Previous research has been conducted on the rotary kilnRotary kilns's ring formationRing formation and the impact of the raw materials. However, the role played by alkali metalAlkali metals impurities in the process of ring formationRing formation has not been investigated. In this study, the actual ring was analyzed and thermodynamicThermodynamics calculations were adopted to explore the origins of alkali metalsAlkali metals and their effect on ring formationRing formation in the rotary kilnRotary kilns. It is concluded that alkali metalsAlkali metals entered the liquid phase and achieved enrichment through formatting aluminosilicateAluminosilicate. When the temperatureTemperature exceeded 1200 °C, the liquid phase generation of coal ash with high alkali metalAlkali metals content reached 22.78%. Reducing the amount of coal ash in the kiln can effectively suppress ring formationRing formation.