Enrichment of phosphorus from iron ore to dicalcium-silicate phase by partial reduction

Nobuhiro Maruoka, Hironari Kubo

Research output: Contribution to journalArticlepeer-review


Due to the low quality of available iron ore, it is necessary to develop a new technology to produce high quality steel from ore containing a high concentration of phosphorous. In this study, we propose a new process for producing low-P steel by concentrating P in the dicalcium silicate phase through a partial reduction process. High-P iron ore was mixed with varying quantities of CaO and graphite and heated at 1 573 K in an Ar atmosphere, and the obtained product was analyzed by electron probe microanalysis. It was found that in the reduced product mixture that was obtained under specific conditions of high basicity and a lower amount of added carbon, more than 95% of P was concentrated in the dicalcium silicate phase, and the P content in metallic iron was sufficiently low.

Original languageEnglish
Pages (from-to)2220-2226
Number of pages7
JournalIsij International
Issue number8
Publication statusPublished - 2021


  • Dicalcium silicate
  • Ironmaking
  • Low grade ore
  • Phosphorous separation

ASJC Scopus subject areas

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


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