Interfacial Kinetics of Nitrogen with Molten Iron Containing Sulfur.

Behavior of Nitrogen During AOD Process

“…Many investigators 1,9,10,13,14) have concluded that absorption and desorption of nitrogen between gas phase and steel melt occurs by either single-site or dual-sites mechanisms. The single-site mechanism is only possible mechanism when other surface active elements, such that oxygen and sulphur, are blocking the movement of adsorbed nitrogen atoms on the surface (Fig.…”

“…Many studies of nitrogen absorption and desorption in iron alloys [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] and in stainless steels or chromium rich alloys [17][18][19][20][21][22] have been published in literature. Effect of surface active elements such as oxygen and sulphur, composition of steel melt as well as partial nitrogen pressure and total pressure on nitrogen absorption and removal have been studied in these investigations.…”

“…Typically, in the industrial cases the rate of absorption and desorption of nitrogen is limited by high interfacial contents of sulphur and oxygen of melt. Many researchers 9,10,[13][14][15][16][17][18][19][20][21][22][23] have reported that absorption of nitrogen is first order or second order reaction depending on the amount of vacant sites and desorption is second order reaction. Reaction rate constants for first and second order reactions with different melt composition have been determined in many studies.…”

Effect of P2O5 Addition on the Rate of CO2 Dissociation on the Surface of FetO-base Molten Oxides

“…The residual rate constant is also observed with the addition of some elements for the dissolution of nitrogen gas into molten iron. [19][20][21][22][23] From Eqs. (8) and (9), Eq.…”

Kinetic Study on Surface Dissolution of Nitrogen on Liquid Steel by Isotope Exchange Technique

“…13,14) Previous experimental results from the isotope exchange technique indicated that nitrogen dissolution was a first order reaction 15) in terms of nitrogen partial pressure and that its rates strongly depended on surface active elements such as oxygen and sulfur. 11,13,16) Glaws and Fruehan [17][18][19] reported the effects of S, Cr and Ni on the rate of nitrogen dissolution reaction on the surface of liquid iron alloys, and Tsukihashi and Fruehan,20) using a carbon-saturated liquid iron specimen, found the effect of some alloying elements (P, Pb, Bi, Te, and S) on the rate of the nitrogen dissolution reaction.…”