Serial Batch Elution of Electric Arc Furnace Oxidizing Slag Discharged from Normal Steelmaking Process into Fresh Water

• Yokoyama Seiji

  Department of Mechanical Engineering, Toyohashi University of Technology

• Suzuki Akito

  Graduate School of Toyohashi University of Technology

• Nik Hisyamudin Bin Muhd Nor

  Department of Mechanical and Manufacturing Engineering, University Tun Hussein Onn Malaysia

• Kanematsu Hideyuki

  Department of Materials Science and Technology, Suzuka National College of Technology

• Ogawa Akiko

  Department of Chemistry and Biochemistry, Suzuka National College of Technology

• Takahashi Toshiyuki

  Department of Chemical Science and Technology, Miyakonojo National College of Technology

• Izaki Masanobu

  Department of Mechanical Engineering, Toyohashi University of Technology

• Umemoto Minoru

  Department of Mechanical Engineering, Toyohashi University of Technology

Bibliographic Information

Other Title

• 普通鋼精錬プロセスから排出された電気炉酸化スラグの淡水への繰返し溶出試験
• フツウ コウ セイレン プロセス カラ ハイシュツ サレタ デンキロ サンカ スラグ ノ タンスイ エ ノ クリカエシ ヨウシュツ シケン

Abstract

The serial batch leaching test of an electronic arc furnace oxidizing slag was performed on the basis of JIS K 0058-1 to investigate the safety of the slag and to clarify the elution mechanism. The slag which was discharged at the time of refining of normal steel was used for this experiment. The slag was dissolved in water whose initial pH was 6.0. After that, the slag was naturally dried. This operation was performed 12 times successively.<br>The dissolution behaviors of Ca and Mg were expressed by the parabolic law. That of Si was expressed by the linear law. The dissolutions of them from the slag were controlled by the diffusion through pore and the surface layer through the surface layer where compositions of FeO and Al₂O₃ were high. Generally, the dissolve concentrations decreased with the increase in the number of the elution times. The environmentally regulated substances were not detected or less than the levels of the environmental quality standards for soil. Ba, Mn, Mo, K, Na, Sr and W were detected as minor element except for the environmentally regulated elements. Generally, the detected environmentally regulated substances and the other minor elements decreased with the number of the elution times. During the elution of the slag, the pH of the aqueous solution steeply increased initially, and it decreased afterwards. The pH decreased with the increase in the number of the elution times.

Journal

• Tetsu-to-Hagane

  Tetsu-to-Hagane 96 (12), 698-705, 2010

  The Iron and Steel Institute of Japan

Keywords

• elution
• oxidizing slag
• environmentally quality standards
• pH

Details

• CRID: 1390282680102700416
• NII Article ID: 130000450220
• NII Book ID: AN10528571
• ISSN: 1341688X
• ISSN: 18832954
• ISSN: 00211575
• DOI: 10.2355/tetsutohagane.96.698
• COI: 1:CAS:528:DC%2BC3cXhsFKqtrzN
• NDL BIB ID: 10925463
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10925463
• Web Site: http://www.jstage.jst.go.jp/article/tetsutohagane/96/12/96_12_698/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed