Chloride Pyrometallurgy of Uranium ore, (I). Chlorination of Phosphate Ore Using Solid or Gas Chlorinating Agent and Carbon

Tomihiro Taki, Shigetoshi Komoto, Keiichiro Otomura, Toshihide Takenaka, Nobuaki Sato, Takeo Fujino

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A thermodynamical and pyrometallurgical study to recover uranium from the phosphate ores was undertaken using the chloride volatilization method. Iron was chlorinated with solid chlorinating agents such as NaCl and CaCl2 in combination with activated carbon, which will be used for removing this element from the ore, but uranium was not. On the other hand, the chlorination using Cl2 gas and activated carbon gave a good result at 1, 223K. Not only uranium but also iron, phosphorus, aluminum and silicon were found to form volatile chlorides which vaporized out of the ore, while calcium remained in the ore as non-volatile CaCl2. The chlorination condition was studied as functions of temperature, reaction time and carbon content. The volatilization ratio of uranium around 95% was obtained by heating the mixture of the ore and activated carbon (35wt%) in a mixed gas flow of Cl2 (200ml/min) and N2 (200ml/min) at 1, 223K for 120min.

Original languageEnglish
Pages (from-to)880-888
Number of pages9
Journaljournal of nuclear science and technology
Volume32
Issue number9
DOIs
Publication statusPublished - 1995 Jan 1

Keywords

  • chloride volatility process
  • chlorination
  • chlorine
  • ore processing
  • phosphate rocks
  • pyrometallurgy
  • reaction time
  • solid chlorinating agent
  • temperature dependence
  • thermodynamics
  • uranium chlorides
  • uranium ores
  • volatility
  • volatilization separation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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