Conversion of Calcium Phosphide to Calcium Phosphate in Reducing Dephosphorization Slags by Oxygen Injection

Jae Hong Shin; Joo Hyun Park

doi:10.2355/isijinternational.53.2266

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Conversion of Calcium Phosphide to Calcium Phosphate in Reducing Dephosphorization Slags by Oxygen Injection

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Keywords: manganese ferroalloys, reducing dephosphorization (RDP), phosphine gas (PH₃), calcium phosphide (Ca₃P₂), Tricalcium phosphate (3CaO·P₂O₅), tetracalcium phosphate (4CaO·P₂O₅), oxygen injection

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2013 Volume 53 Issue 12 Pages 2266-2268

DOI https://doi.org/10.2355/isijinternational.53.2266

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Abstract

We tried to confirm the conversion of Ca₃P₂ to calcium phosphate by oxygen injection into the molten Reducing Dephosphorization (RDP) slag as well as to find the stoichiometry of calcium phosphate compound by the treatment. It was experimentally confirmed that the Ca₃P₂ was converted to beta-3CaO·P₂O₅ and 4CaO·P₂O₅ phases by oxygen injection treatment of the molten RDP slag by XRD analysis and thermodynamic estimation.

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