Method for dephosphorization of chromium-containing molten...

Details Method for dephosphorization of chromium-containing molten... Method for dephosphorization of chromium-containing molten...

C - Chemistry, Metallurgy

21

C

53/104, 53/94

C21C 1/02 (2006.01) C21C 5/00 (2006.01)

Patent

CA 2035886

A method for the dephosphorization of a chromium-containing molten pig iron with a reduced oxidation loss of chromium wherein a solid-gas mixture of a particulate flux dispersed in an oxygen-containing gas is injected into the chromium-containing molten pig iron from a location below a surface level of the chromium-containing molten pig iron, the flux containing at least 70 % by weight of CaO and CaF2 in sum with a weight ratio of CaO to CaF2 (CaO/CaF2) of not lower than 4/6, the solid-gas mixture having an O2/(CaO + CaF2) ratio within the range of from 20 to 120 Nl/kg wherein O2 is an amount of oxygen in Nl contained in the oxygen-containing gas.

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