Consideration of dissolution behavior of elements in steelmaking slag based on their stability diagram in seawater

Takahiro Miki, Kiyoteru Shitogiden, Yusuke Samada, Tetsuya Nagasaka, Mitsutaka Hino

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Stability diagrams for Ca, Mg, CO2, P, Si, Fe and F in seawater have been estimated to understand the dissolution behavior of steelmaking slag constituents into seawater as nutrition for phytoplankton propagation. Dissolution behavior of each element from crystal phase present in steelmaking slags into seawater has been discussed based on the stability diagram. The presence of 4CaO·P2O5 phase in steelmaking slag is preferred for effective phosphorus dissolution into seawater. Increase of pH value by Ca elution and buffering action of Mg in seawater against it have been clearly explained by using stability diagram. Elution behavior of environmentally restricted elements from steelmaking slag into seawater was also estimated. It was confirmed that stability diagram was a powerful tool to understand dissolution behavior of steelmaking slag.

Original languageEnglish
Pages (from-to)388-392
Number of pages5
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume89
Issue number4
DOIs
Publication statusPublished - 2003 Apr

Keywords

  • Environmentally restricted element
  • Nutrition
  • Seawater
  • Stability diagram
  • Steelmaking slag

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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