Dissolution kinetics of phosphate ore in acidic solutions

Sanjian Ma*, E. T M J Martynowicz, G. J. Witkamp, G. M. van Rosmalen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The dissolution kinetics of Florida and Jordan phosphate ore was studied in diluted nitric acid (0.2, 0.5, 1.0 mol · L-1), and in phosphoric acid (55 wt% H3PO4) aqueous solutions. It was found that the hydrogen ions concentration is a controlling factor, but the calcium ions concentration can not affect the dissolution rate in the range of 0.0 and 2.0 wt% Ca2+. The effects of temperature, stirring intensity and the size of ore particles were also investigated. The transfer of hydrogen ion depends on the diffusion, while the calcium ions transfer is assumed to be depended on mechanically stripping. The shrinking core model with hydrogen ions diffusion control match the experimental results.

Original languageEnglish (US)
Pages (from-to)72-81
Number of pages10
JournalChinese Journal of Chemical Engineering
Volume2
Issue number2
StatePublished - Jun 1 1994
Externally publishedYes

ASJC Scopus subject areas

  • Chemical Engineering(all)

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