Dissolution behavior of elements in steelmaking slag into artificial seawater

Takayuki Futatsuka, Kiyoteru Shitogiden, Takahiro Miki, Tetsuya Nagasaka, Mitsutaka Hino

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Suppression of CO2 and slag discharged from iron- and steelmaking processes are some of the typical biggest issues for the protection of global environment and sustainable growth of steelmaking industry. Utilization of active phytoplankton propagation will be one of the best options, to stabilize and reduce carbon dioxide with great efficiency. Inorganic minerals such as C, N, Si, P, and Fe are necessary, for phytoplankton to grow. It is crucial for effective supply of nutrition to understand the dissolution mechanism of elements from steelmaking slags into seawater. At first, the morphology of the precipitated phases in steelmaking slags during cooling period was investigated in the present work. It was continued to compare the dissolution behavior of some elements from steelmaking slags and pure substances such as 4CaO·P2O5, 3CaO·P2O5 and 2CaO·SiO2-3CaO·P2O5 (2.8 mass% P) solid solution phase into artificial seawater for understanding their dissolution possibility. The dissolution behavior of elements such as phosphorus are strongly dependent of phase present in steelmaking slag. It was confirmed that the dissolution of component in steelmaking slag was observed such that enough amount of nutrition for phytoplankton multiplication can be supplied from steelmaking slag.

Original languageEnglish
Pages (from-to)382-387
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume89
Issue number4
DOIs
Publication statusPublished - 2003 Apr

Keywords

  • Carbon dioxide
  • Nutrition
  • Phytoplankton
  • Seawater
  • Steelmaking slag

ASJC Scopus subject areas

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

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