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Abstract <p>The results of a study on the interaction of loparite concentrate with ammonium sulfate are presented. It was found that the reactions of the main components of the concentrate with (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> begin after the thermal decomposition of ((NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> with the formation of ammonium hydrosulfate and proceed in the temperature range of 280–350°C to form double sulfates of ammonium and the elements contained in the concentrate. It was shown that aqueous leaching of the reaction product at 340°C followed by holding the resulting solution at 80°C makes it possible to completely precipitate titanium, niobium, and tantalum as hydroxides, while transferring the rare-earth elements into the solution.</p>

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Interaction of Loparite Concentrate with Ammonium Sulfate

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • M. A. Medkov,
  • G. F. Krysenko,
  • E. E. Dmitrieva,
  • E. B. Merkulov,
  • S. I. Ivannikov

摘要

Abstract

The results of a study on the interaction of loparite concentrate with ammonium sulfate are presented. It was found that the reactions of the main components of the concentrate with (NH4)2SO4 begin after the thermal decomposition of ((NH4)2SO4 with the formation of ammonium hydrosulfate and proceed in the temperature range of 280–350°C to form double sulfates of ammonium and the elements contained in the concentrate. It was shown that aqueous leaching of the reaction product at 340°C followed by holding the resulting solution at 80°C makes it possible to completely precipitate titanium, niobium, and tantalum as hydroxides, while transferring the rare-earth elements into the solution.