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<p>To mitigate magnesite tailings and effectively utilize natural magnesite ores, the sintering behavior of magnesia obtained from flotation magnesite was investigated. The influence, on sintering properties and microstructures, of sintering temperature of flotation magnesite, and sintering schedule of magnesia were studied. The sintering mechanism of magnesia was assessed via dynamic analysis. The results indicate that temperature has a much greater impact than holding time on the sintering of magnesia. The dominant sintering mechanism changes from volume diffusion to grain boundary diffusion with the increase in sintering temperature. As a result, pore migration and expulsion along grain boundaries were favored, leading to the densification. A bulk density of 3.43&#xa0;g/cm<sup>3</sup> was successfully achieved using flotation magnesite. At this point, the activation energy for grain growth is only 69.6KJ/mol.</p>

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From magnesite tailings to high quality sintered magnesia: role of sintering kinetics

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • Jiachen Qin,
  • Chi Zhou,
  • Jian Luan,
  • Chunyan Wang,
  • Shushan Wang

摘要

To mitigate magnesite tailings and effectively utilize natural magnesite ores, the sintering behavior of magnesia obtained from flotation magnesite was investigated. The influence, on sintering properties and microstructures, of sintering temperature of flotation magnesite, and sintering schedule of magnesia were studied. The sintering mechanism of magnesia was assessed via dynamic analysis. The results indicate that temperature has a much greater impact than holding time on the sintering of magnesia. The dominant sintering mechanism changes from volume diffusion to grain boundary diffusion with the increase in sintering temperature. As a result, pore migration and expulsion along grain boundaries were favored, leading to the densification. A bulk density of 3.43 g/cm3 was successfully achieved using flotation magnesite. At this point, the activation energy for grain growth is only 69.6KJ/mol.