Distribution of P_2O_5 between P-rich Phase and Matrix Phase in P-bearing Steelmaking Slag

摘要

To recycle the phosphorus in P-bearing steelmaking slag and use the slag as phosphate fertilizer, it is necessary to study the distribution of P_(2)O_(5) between the P-rich phase and matrix phase in P-bearing steelmaking slag. The addition of MgO and MnO into the slag has no effect on the phosphorus form of existence in the slag and has little effect on the %(P_(2)O_(5))_(SS). In contrast, Na_(2)O and CaF_(2) in the slag change the phosphorus form of existence in the slag and increase %(P_(2)O_(5))_(SS) obviously. L _(p)’, γ P 2 O 5 ( S S ) ${gamma _{{{m{P}}_2}{{m{O}}_5}(SS)}}$ , γ P 2 O 5 ( M ) ${gamma _{{{m{P}}_2}{{m{O}}_5}(M)}}$ , C _(P(M)) and C _(P(SS)) were calculated, and it was found that %(CaO), %(T.Fe) and %(P_(2)O_(5)) in the P-rich phase and matrix phase significantly affect L _(p)’. MnO and MgO in the slag have little effect on the distribution of P_(2)O_(5) between the P-rich phase and matrix phase, whereas Na_(2)O and CaF_(2) affect the distribution of P_(2)O_(5) between the P-rich phase and matrix phase.