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<p>This paper primarily investigates the impact of additives on the synthesis of mullite. The results show that the addition of NaF can reduce the optimum calcination temperature of mullite synthesis, and cristobalite is removed when the calcination temperature is 1300°C, but the content of synthetic mullite is very low, because NaF inhibits the formation of mullite at high temperature. As an additive, La<sub>2</sub>O<sub>3</sub> plays a role in promoting sintering in the reaction of synthesizing mullite, reducing the calcination temperature of synthetic mullite by about 100°C, and the performance of mullite at each calcination temperature is superior to that without La<sub>2</sub>O<sub>3</sub>.</p>

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Study on the Effect of Additives on the Synthesis of Mullite from Coal Gangue Acid Leaching Residue

  • 期刊论文

  • 发表日期：

    2025年9月12日

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  • Ai-Chun Zhao,
  • Lin-Jie Qin,
  • Chen-Jia Liu,
  • Chen-Hui Zhao,
  • Tian-Rui Yun,
  • Su-Meng Wei,
  • Wen-Yan Tian,
  • Bao-Ren Wang

摘要

This paper primarily investigates the impact of additives on the synthesis of mullite. The results show that the addition of NaF can reduce the optimum calcination temperature of mullite synthesis, and cristobalite is removed when the calcination temperature is 1300°C, but the content of synthetic mullite is very low, because NaF inhibits the formation of mullite at high temperature. As an additive, La2O3 plays a role in promoting sintering in the reaction of synthesizing mullite, reducing the calcination temperature of synthetic mullite by about 100°C, and the performance of mullite at each calcination temperature is superior to that without La2O3.