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Abstract <p>The dissolution behavior of Caldag lateritic nickel ore with nitric acid solution under atmospheric pressure conditions was investigated. The following five variables were experimentally explored to understand their effects on nickel, cobalt, manganese, and iron dissolution: nitric acid concentration, slurry density, leaching temperature, leaching duration, and particle size. It is found that the dissolution of metals increased with increasing nitric acid concentration and temperature, and with decreasing slurry density. It is also found that high dissolution of nickel, cobalt, manganese and iron from the ore can be achieved using relatively coarse particle sizes under the conditions explored. The kinetic study indicates that the leaching process is controlled by the surface chemical reactions. The activation energy for the nickel dissolution from the ore was calculated to be 42.7 kJ/mol, which is consistent with the values reported for chemically-controlled reactions.</p>

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Atmospheric Leaching of a Turkish Laterite in Nitric Acid Solution

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • S. Hussaini,
  • S. Ozsarac,
  • Z. T. Ichlas,
  • S. Kursunoglu,
  • M. Kaya

摘要

Abstract

The dissolution behavior of Caldag lateritic nickel ore with nitric acid solution under atmospheric pressure conditions was investigated. The following five variables were experimentally explored to understand their effects on nickel, cobalt, manganese, and iron dissolution: nitric acid concentration, slurry density, leaching temperature, leaching duration, and particle size. It is found that the dissolution of metals increased with increasing nitric acid concentration and temperature, and with decreasing slurry density. It is also found that high dissolution of nickel, cobalt, manganese and iron from the ore can be achieved using relatively coarse particle sizes under the conditions explored. The kinetic study indicates that the leaching process is controlled by the surface chemical reactions. The activation energy for the nickel dissolution from the ore was calculated to be 42.7 kJ/mol, which is consistent with the values reported for chemically-controlled reactions.