SciELO - Scientific Electronic Library Online

 
vol.114 issue5Evaluation of different adsorbents for copper removal from cobalt electrolyteAtmospheric oxidative and non-oxidative leaching of Ni-Cu matte by acidified ferric chloride solution author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Journal of the Southern African Institute of Mining and Metallurgy

On-line version ISSN 2411-9717

Abstract

CHEN, G.  and  HE, S.. Thermodynamic analysis and experimental study of manganese ore alloy and dephosphorization in converter steelmaking. J. S. Afr. Inst. Min. Metall. [online]. 2014, vol.114, n.5, pp. 391-399. ISSN 2411-9717.

In this study, the effects of slag compositions, slag amount, temperature, and carbon content of steel on the manganese and phosphorus distribution ratios during converter steelmaking were analysed using the classical regular solution theory, and industrial tests were performed using two 80 t top-and-bottom combined blown converters (duplex melting process). The results indicate that the slag amount, temperature, and carbon content in steel are the main factors affecting the manganese yield when converter slag compositions remain constant. The FeO content of the slag has a strong impact on the manganese distribution ratio, while the slag basicity and MgO content have no obvious effect. The calculations and experimental results show that the phosphorus distribution ratio increases sharply with increasing slag basicity R, but then decreases with the increase of MgO and MnO contents in the slag. The final slag in converter steelmaking should have the following characteristics: 3.5 < R < 4.5, 15% < (FeO) < 20%, and 6% < (MgO) < 8%. The slag amount should be controlled appropriately at the same time. The results of this investigation would be useful in deciding on the application of manganese ore in alloying and identifying the slagging regime in converter steelmaking.

Keywords : slag compositions; distribution ratios; classical regular solution theory; slagging regime.

        · text in English

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License