1 results listed
These ores are primarily enriched in order to make low-grade iron ores (> 50% Fe content) available at the blast furnace, which can be fed directly to the blast furnace. The most widely used method of agglomeration after enrichment is pelleting. In this study, the characteristic features of three different pellet types, one domestic and two imported (Ferroexpo and east); chemical, physical and metallurgical properties have been determined. The element and compound analysis were performed with XRF and XRD devices. By using different size of sieves, grain size analysis and moisture were determined before entering the blast furnace. By the Rul (R40) test at 1050 °C, with the mix gas (%40 CO+ 2% H2 + 58% N2), the reduction rate of the furnace was measured by difference in height and pressure inside the furnace. The volume increase during reduction was determined by swelling test on 18 pellets at 900 C. The degredation index of the iron ores reduced by mix gas at 500 °C was determined by the LTD test. The crumbling and dusting indexies of pellets during transport in the plant was measured by the drum test. At the end of the research, it was found out that 3 different pellets provided by KARDEMİR A.Ş. were advantageous, and the changes in mineral ratios changed the technological test results and this effect on the blast furnace reactions.
International Iron & Steel Symposium
UDCS
Fatma MEYDANERİ TEZEL
Neslihan ATALAY