Correlation between the cold compression test and abrasion resistance test (astm e 279-97) in self-reducing pellets

Alberto Eloy Anduze Nogueira, Adolfo Pillihuaman Zambrano, Cyro Takano, Marcelo Breda Mourão, Guilherme Frederico Bernardo Guilherme Frederico

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

Abstract

Mechanical properties are very important on development of self-reducing technologies of iron ore raw materials. In order to use the self-reducing pellets, is necessary to improve their mechanical stresses and abrasion resistance. In the iron ore reduction processes, the self-reducing pellets need to present a good cold crushing strength to support the material column weight within the blast furnace, or need a wear resistance when they are being transported or handled in a rotary kiln; In this work, the cold compressive strength and resistance to abrasion were measured in terms of the graphite concentration. The abrasion resistance was measured by tumbler test (ASTM 279-97). It was prepared different self-reducing pellet of 17 mm diameter, containing iron ore, graphite and with 10% mass of Portland cement High Initial Strength (HIS). The cement was kept constant at level of 10% and iron ore plus graphite proportions was changed from 90/0 up to 0/90 respectively. This selected method enables a more uniform variation of the mechanical strength of the pellets, keeping constant the amount of cement. It was obtained compressive strengths of mixtures, testing 10 samples for each composition of pellets. Samples were tested in the tumbler, adjusting the drum volume to sample quantity and was measured the amount of retained material in the 6.3 mm mesh sieve. The results with increasing graphite content presented a decrease on compressive strength and increase on abrasion resistance.

Original languageEnglish
Title of host publication6th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore
Pages224-233
Number of pages10
StatePublished - 2012
Externally publishedYes
Event6th International Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Rio de Janeiro, Brazil
Duration: 14 Oct 201218 Oct 2012

Publication series

Name6th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore
Volume1

Conference

Conference6th International Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012
Country/TerritoryBrazil
CityRio de Janeiro
Period14/10/1218/10/12

Keywords

  • Abrasion
  • Compression test
  • Friction
  • Self-reducing pellets
  • Tumbler test

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