A Study on the Dephosphorization Equilibrium in an LD Converter

Application of Schenck's equilibrium formula and Herasymenko's ionic method

Abstract

The authers applied the dephosphorization equilibrium formulas reported by Schenck and Herasymenko to the final slag and metal of the 3-ton experimental LD converter.
The results obtained were as follows.
(1) The observed values of logK^IV_P in the Schenck's formula had a linear relation to 1/t, but they located in the upper region against the Schenck's equilibrium.
(2) Assuming, the next formula was obtained
(3) had a maximum value on the value of 25-30% of (T. Fe).
(4) In the Herasymenko's formula, linear relation was obtained between logK^P_Fe and Ca⁺⁺ and this relation was expressed as follows,
This formula had a deviation from the open-hearth formula reported by Herasymenko. This meant that the dephosphorization of an LD converter did not approach closer to the equilibrium than open-hearth furnaces.