Title
Correlation between the cold compression test and abrasion resistance test (astm e 279-97) in self-reducing pellets
Date Issued
01 December 2012
Access level
metadata only access
Resource Type
conference paper
Author(s)
University of Sao Paulo
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.
Start page
224
End page
233
Volume
1
Language
English
OCDE Knowledge area
Electroquímica
Ingeniería química
Subjects
Scopus EID
2-s2.0-84883721749
ISBN
9781627480215
ISBN of the container
978-162748021-5
Conference
6th 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
Sources of information:
Directorio de Producción Científica
Scopus