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The Atlas Materials Process for nickel and cobalt recovery from saprolite ores has undergone extensive bench and pilot plant testing and is moving toward commercial implementation, with commissioning targeted for 2027. The process involves hydrochloric acid leaching of valuable metals, impurity removal to reject iron, aluminum, and chromium, production of mixed hydroxide precipitate (MHP) of nickel and cobalt, manganese removal, and magnesium product formation. The leaching and impurity removal residue may be used as a supplemental cementitious material (SCM) to replace fly ash in cement manufacture. Magnesium hydroxide may be precipitated by the addition of sodium hydroxide, and the resulting sodium chloride solution may be recycled through the chlor-alkali process to regenerate hydrochloric acid for leaching and sodium hydroxide for precipitation. The process is designed to produce no solid wastes and have a low carbon footprint through maximum use of renewable energy. The results of the bench and pilot plant testing will be presented and discussed.

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The Atlas Materials Process for Nickel and Cobalt Recovery: A Pathway to Low Carbon Nickel and Cobalt from Saprolite Ores

  • 会议论文

  • 发表日期：

    2025年

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  • David Dreisinger,
  • Jeremy Ley,
  • Mike Johnson,
  • Niels Verbaan,
  • Sridevi Thomas,
  • Ken Baxter,
  • Alexander Burns

摘要

The Atlas Materials Process for nickel and cobalt recovery from saprolite ores has undergone extensive bench and pilot plant testing and is moving toward commercial implementation, with commissioning targeted for 2027. The process involves hydrochloric acid leaching of valuable metals, impurity removal to reject iron, aluminum, and chromium, production of mixed hydroxide precipitate (MHP) of nickel and cobalt, manganese removal, and magnesium product formation. The leaching and impurity removal residue may be used as a supplemental cementitious material (SCM) to replace fly ash in cement manufacture. Magnesium hydroxide may be precipitated by the addition of sodium hydroxide, and the resulting sodium chloride solution may be recycled through the chlor-alkali process to regenerate hydrochloric acid for leaching and sodium hydroxide for precipitation. The process is designed to produce no solid wastes and have a low carbon footprint through maximum use of renewable energy. The results of the bench and pilot plant testing will be presented and discussed.