Activities of Fe_xO in Molten Slags Coexisting with Solid CaO and Ca₂SiO₄–Ca₃P₂O₈ Solid Solution

<i>In-situ</i> Phase Identification of Crystallized Compound from 2CaO·SiO₂–3CaO·P₂O₅ Liquid

“…Many previous dephosphorization studies [2][3][4][5][6][7][8][9][10][11][12][13][14][15] assumed that the α phase of the C2S-C3P solid solution is precipitated in molten steelmaking slag. However, since molten steelmaking slag is multi-component oxide system including FeO and MgO which could be dissolved into the dicalcium silicate, it has not been clear whether the α phase of the C2S-C3P solid solution is precipitated.…”

“…The dephosphorization process is mainly performed with the dicalcium silicate (2CaO•SiO 2 , C2S) -saturated molten slag, and phosphorus behavior during the dephosphorization has been investigated by many authors. [2][3][4][5][6][7][8][9][10][11][12][13][14][15] Generally, phosphorus in molten iron is oxidized to P 2 O 5 and preferentially distributed into molten slag, which forms the tri-calcium phosphate (3CaO•P 2 O 5, C3P) compound in the slag. On the other hand, as lime for the refining agent is dissolved to the molten slag, dicalcium silicate compound is spontaneously precipitated in the slag.…”

Thermal Conductivity of 2CaO·SiO₂ Bearing Solid Solution

“…Change in basicity with the composition of present solid solution may be proved by the fact that phosphorus distribution ration between molten CaO-SiO 2 -P 2 O 5 -FeO slag saturated with 2CaO·SiO 2 -3CaO·P 2 O 5 solid solution and carbon saturated molten iron sharply decreases with an increase in 3CaO·P 2 O 5 concentration of the solid solution. 13) On the basis of thermal conductivities presently obtained, heat transfer and supply in the practical process can be discussed from the kinetic point of view. As mentioned in the foregoing chapter of the introduction, residual CaCO 3 having survived the calcination process and remained in the quick-lime can be thermally decomposed to generate CO 2 gas on heating, which effectively breaks the covering layer of 2CaO·SiO 2 on the surface of lime.…”

Reevaluation and Measurements of Fe<i>_x</i>O Activities in Fe<i>_x</i>O–CaO–SiO₂ Pseudo-ternary System at 1573 K

“…/ , increased with an increase in the Fe x O concentration in liquid slag, {mass%Fe x O} L . [40][41][42][43] was greater than 10 at the composition of {mass%Fe x O} L > 50, and then the concentrations of P 2 O 5 in the liquid slag were so low that they were ignored. Namely, it could be assumed that the Ca 2 SiO 4 -Ca 3 P 2 O 8 solid solution coexisted with the Fe x O-CaO-SiO 2 ternary liquid slag.…”