Effect of water vapour on distribution of phosphorus between liquid iron and MgO saturated slag relevant to flash ironmaking technology

Abstract

As part of ongoing effort to develop a novel flash ironmaking process using reduction of iron ore concentrate by natural gas or hydrogen, equilibrium phosphorus distribution between MgO saturated slag and iron was determined in the temperature range of 1550–1650°C under three different gas atmospheres: H₂/H₂O, H₂/H₂O/CO/CO₂ and CO/CO₂. The distribution ratios of phosphorus L _P were 8, 17 and 20 respectively under these atmospheres. In the flash process, over ∼25 wt-%P volatilises during ore concentrate downward flight in the reactor shaft in addition to avoiding the use of coke. Therefore, it is expected that the proposed method would produce iron with less phosphorus content than that of the blast furnace.

Get full access to this article

View all access options for this article.

References

Sohn

Choi

Zhang

and Ramos

: Iron Steel Technol. (AIST Trans.), 2009, 6, (8), 158–165.

Choi

and Sohn

: Ironmaking Steelmaking, 2010, 37, (2), 81–88.

Sohn

: Steel Times Int., 2007, 68–72.

Mohassab-Ahmed

and Sohn

: JOM, 2013, 65, (11), 1559–1565.

Mohassab-Ahmed

: ‘Phase equilibria between iron and slag in CO/CO₂/H₂/H₂O atmospheres relevant to a novel flash ironmaking technology’, PhD thesis, The University of Utah, Salt Lake City, UT, USA, 2013.

Mohassab-Ahmed

and Sohn

: Steel Res. Int., 2014, 85, (5), 875–884.

Mohassab-Ahmed

RMY

and Sohn

: ‘Effect of water on S and P distribution between liquid Fe and MgO-saturated slag relevant to a flash ironmaking technology,’ Proc. EPD Cong. 2014, 143rd TMS Annual Meet., (ed. Yurko

et al.), 203–210; 2014, San Diego, CA, TMS/Wiley.

Lee

and Fruehan

: Ironmaking Steelmaking, 2005, 32, 503–508.

Pak

and Fruehan

: Metall. Trans. B, 1986, 17B, 797–804.

10.

Ahundov

Tsukihashi

and Sano

: ISIJ Int., 1991, 31, 685–688.

11.

Turkdogan

and Bills

: Iron Steel Inst. (Lond.), 1958, 188, 143–153.

12.

Knuppel

and Oeters

: Stahl Eisen, 1961, 81, (22), 1437–1449.

13.

Mohassab-Ahmed

and Sohn

: ‘Method and device for digestion of materials in a microwave oven’, US patent application no. 61/651, 789, May 25, 2012.

14.

Mohassab-Ahmed

Sohn

and Kim

: Ind. Eng. Chem. Res., 2012, 51, (9), 3639–3645.

15.

Mohassab-Ahmed

Sohn

and Kim

: Ind. Eng. Chem. Res., 2012, 51, (20), 7028–7034.

16.

Cavanagh

: ‘Progress in the development of the jet smelting process’, Proc. Symp. Electrochemical Society on ‘Iron ore reduction’, Oxford, UK, May 1960, Pergamon Press, 221.

17.

Mohassab-Ahmed

and Sohn

: ‘Slag structures and properties by spectroscopic analysis: effect of water vapour relevant to a novel flash ironmaking technology’, Proc. 5th Int. Symp. on ‘High-temperature metallurgical processing’, Proc. 143rd Annual TMS Meet., (ed. Jiang

et al.), 11–18; 2014, San Diego, CA, TMS/Wiley.

18.

Mohassab

and Sohn

: Steel Res. Int., DOI 10.1002/srin.201400197.

19.

Mohassab

and Sohn

: Steel Res. Int., DOI 10.1002/srin.201400186.

20.

Mohassab-Ahmed

and Sohn

: ‘Effect of water vapour on the activities of FeO and MgO in slags relevant to a novel flash ironmaking technology’, Proc. 5th Int. Symp. on ‘High-temperature metallurgical processing’, Proc. 143rd Annual TMS Meet., (ed. Jiang

et al.), 83–90; 2014, San Diego, CA, TMS/Wiley.

21.

Mohassab-Ahmed

and Sohn

: Ironmaking Steelmaking, 41, (9), 665–675.

22.

Mohassab Ahmed

Sohn

and Zhu

: Ironmaking Steelmaking, 2014, 41, (8), 575–582.