Effects of reducer and slag concentrations in the iron-carbon nuggets coalescence in self reducing processes

Alberto Nogucira, Cyro Takano, Marcclo Mourão, Adolfo Pillihuaman

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

This paper studies the effects of reducer and slag concentrations on size distribution in iron-carbon nuggets. For this, it was used mixtures and self-reducing pellets composed of low and high grade hematite, petroleum coke, graphite and slag elements. The process was developed in a rotary kiln at 1773 K for 10 minutes. In each resulting product was determined its size distribution with a set of meshes (ASTM B 214-76). Results revealed different percent of iron-carbon nuggets with diameter higher than 7.93 mm sizes. Increasing the amount of reducer by 10% in self-reducing mixtures, resulted in an 80% drop of nuggets content, however, in self-reducing pellets was only a 15% drop. And increasing slag by 10% was generated a 67.6% nuggets drop in self-reducing mixture. In both cases, the increase of distance between particles, and the creation of a physical barrier between them caused a decrease of coalescence efficiency.

Original languageEnglish
Title of host publication5th International Symposium on High-Temperature Metallurgical Processing - Held During TMS 2014 143rd Annual Meeting and Exhibition
PublisherMinerals, Metals and Materials Society
Pages247-254
Number of pages8
ISBN (Print)9781118888117
DOIs
StatePublished - 2014
Event5th International Symposium on High-Temperature Metallurgical Processing - TMS 2014 143rd Annual Meeting and Exhibition - San Diego, CA, United States
Duration: 16 Feb 201420 Feb 2014

Publication series

NameTMS Annual Meeting

Conference

Conference5th International Symposium on High-Temperature Metallurgical Processing - TMS 2014 143rd Annual Meeting and Exhibition
Country/TerritoryUnited States
CitySan Diego, CA
Period16/02/1420/02/14

Keywords

  • Coalescence
  • Iron ore
  • Nuggets
  • Rotary kiln
  • Self-reducing
  • Slag

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