Scholarlink

<p>Zirconia is a highly valuable material with diverse industrial applications, primarily derived from zircon, a heavy mineral commonly found in coastal sands. In this study, sand samples were collected from the eastern coast of India, and a mineral processing route was employed to recover zircon concentrate. The recovered zircon was then subjected to sodium hydroxide reduction to synthesize zirconia. To investigate the reaction kinetics between solid zircon sand and liquid sodium hydroxide, the shrinking core model was applied, considering both the external diffusion region and the internal reaction region. The activation energy for external diffusion control was 52&#xa0;kJ/mol. Under optimized reaction conditions, a detailed material balance of the input and output was conducted, revealing a final ZrO₂ recovery of 93%. The decomposition efficiency improves with increasing temperature, reaching a maximum zircon recovery of 99% at 650&#xa0;°C. Additionally, within the temperature range of 550–700&#xa0;°C, the recovery rate increases reaching the peak at 4&#xa0;h of duration.These findings contribute to developing efficient zirconia production methods, offering potential benefits for industrial and nanomaterial applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A Study on Recovery Kinetics of Zirconia from Beach Sand Zircon

  • 期刊论文

  • 发表日期：

    2025年6月7日

查看全文
  • Rupambika Mohanty,
  • Sunita Routray,
  • Ranjita Swain,
  • Rudra Narayan Mohapatro,
  • Sarthak Prasad Sahoo

摘要

Zirconia is a highly valuable material with diverse industrial applications, primarily derived from zircon, a heavy mineral commonly found in coastal sands. In this study, sand samples were collected from the eastern coast of India, and a mineral processing route was employed to recover zircon concentrate. The recovered zircon was then subjected to sodium hydroxide reduction to synthesize zirconia. To investigate the reaction kinetics between solid zircon sand and liquid sodium hydroxide, the shrinking core model was applied, considering both the external diffusion region and the internal reaction region. The activation energy for external diffusion control was 52 kJ/mol. Under optimized reaction conditions, a detailed material balance of the input and output was conducted, revealing a final ZrO₂ recovery of 93%. The decomposition efficiency improves with increasing temperature, reaching a maximum zircon recovery of 99% at 650 °C. Additionally, within the temperature range of 550–700 °C, the recovery rate increases reaching the peak at 4 h of duration.These findings contribute to developing efficient zirconia production methods, offering potential benefits for industrial and nanomaterial applications.