A Novel Process for Separation of Magnetite and Phosphorous Phases from a CaO–SiO2–FeO–P2O5 Slag

Guoxuan Li, Jinshan Liang, Jun Long, Dong Guan, Zushu Li, Sridhar Seetharaman, Juncheng Li

Research output: Contribution to journalArticlepeer-review

Abstract

Iron and phosphorus were successfully separated from CaO–SiO2–FeO–P2O5 slag through atmospheric control, B2O3 addition and a combination of magnetic separation and flotation. For the slag with basicity (CaO/SiO2) of 2.5 and B2O3 addition of 6% (weight percentage), iron and phosphorus in the slag were enriched in the form of magnetite (Fe3O4) and calcium phosphate (Ca10P6O25) phases respectively under Ar atmosphere. Using a combination of magnetic separation and flotation, the concentrates were obtained with Fe3O4 and P2O5 content of 92.84% and 37.66% respectively, corresponding to the recovery ratios of 85.8% for iron and 91.3% for phosphorus.

Original languageEnglish (US)
Pages (from-to)1556-1559
Number of pages4
JournalISIJ International
Volume62
Issue number7
DOIs
StatePublished - 2022

Keywords

  • atmospheric control
  • B2O3 addition
  • calcium phosphate
  • magnetite
  • steelmaking slag

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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