| Abstrakt: |
Pellets from concentrates obtained from the ores of the Sokolov and Sarbai deposits are roasted on conveyor machines. The ores of the deposits differ both in mineralogical and chemical composition. Therefore, it was necessary to study and compare the technological and metallurgical properties of the obtained pellets. At the same time, the firing parameters of the pellets also differ. It was necessary to find out which ore pellets from which deposit have higher metallurgical properties, on the basis of which their production is more preferable. The properties of varieties of concentrates according to the degree of grinding, with different content of silicon oxide, waste rock and sulfur, were studied. At the same time, the fractional composition, true density and specific surface of the concentrates were determined using physicochemical methods. Firing of pellets was studied on a sintering bowl and on a Tamman furnace. After firing, the pellets were tested for strength, the yield of fines, the degree of reduction of the pellets, and their strength during recovery were determined depending on the content of silicon oxide and sulfur in them. The main difference between the concentrates from the ores of the Sokolov and Sarbai deposits, associated with the intensity of their recovery, was established. The results of the study are of interest for technologists in the issue of optimizing regime parameters during the firing of pellets from ore varieties on conveyor machines, and can also be useful in studying the processes of reduction of iron oxides in pellets obtained from the ores of the Sokolov and Sarbai deposits in the zone of indirect reduction in a blast furnace. [ABSTRACT FROM AUTHOR] |
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