Dephosphorisation of high carbon ferromanganese using BaCO^sub 3^ based fluxes

Dephosphorisation of ferromanganese under oxidising conditions is difficult to achieve without significant manganese loss. The present study identifies the suitable conditions for selective removal of phosphorus using BaCO sub 3 based fluxes. Initially Ba-P-O predominance diagrams for both standard...

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Bibliographic Details
Published in:Ironmaking & steelmaking 2001-01, Vol.28 (5), p.396-403
Main Authors: Chaudhary, P N, Goel, R P, Roy, G G
Format: Article
Language:English
Subjects:
Carbon
Manganese steel
Phosphorus
Studies
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Summary:Dephosphorisation of ferromanganese under oxidising conditions is difficult to achieve without significant manganese loss. The present study identifies the suitable conditions for selective removal of phosphorus using BaCO sub 3 based fluxes. Initially Ba-P-O predominance diagrams for both standard and non-standard conditions were constructed, and studied to identify the best possible flux composition for selective removal of phosphorus without significant manganese loss. Experiments were conducted by varying the flux composition BaCO sub 3 BaF sub 2 ), flux rate, metal composition, and temperature under the desired conditions for phosphorus removal. A method was evolved to melt BaCO sub 3 based flux at temperatures below 1400 deg C. A flux composition consisting of 66% BaCO sub 3 and 34% BaF sub 2 added at the rate of 16 wt-% of the amount of ferromanganese charged was found to be most effective.
ISSN:0301-9233
1743-2812