Design for Carbon Core Pellet toward Co-production with Sinter

Kazumi Iwase, Takahide HigucHi, Tetsuya Yamamoto, Taichi Murakami

Research output: Contribution to journalArticlepeer-review


Current global demand for the carbon emission reduction and the depletion progress of high-grade iron ore deposits require the integrated solution toward sinter and ironmaking process. Several countermeasures have been proposed regarding the development of highly reducible burden materials for the blast furnace and the use of beneficiated fine iron ores in the sintering machine. However, their application to actual sintering and ironmaking equipment have been limited because the sinter productivity is deteriorated. Here the present study investigated co-production of the carbon composite pellet and sinter with existing sintering machines. Even if fired in an oxidizing atmosphere, carbon-core-pellets can be produced under conditions that simulate the conventional sintering process. This is because a protective shell over the carbon core inhibits the carbon from combustion. Importantly, the structure and composition of the pellets are properly designed so that this protective shell does not melt overly or break during firing. The design parameters govern the strength and reducibility of pellets after firing, and those influence is analyzed quantitatively. Overall, a pot test trial in which designed pellets have been blended exhibited the viability of the pellet-sinter co-production.

Original languageEnglish
Pages (from-to)483-493
Number of pages11
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Issue number6
Publication statusPublished - 2021 Jun 1


  • Carbon core pellet
  • Co-production
  • Highly reducible sinter

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry


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