MMK Blast Furnace Operation with a High Proportion of Pellets in a Charge. Part 2*

Abstract

Results are given for calculation of blast furnace operation with a high proportion of Sokolovo-Sarbaiskii Metallurgical Production Association unfluxed pellets with a different content of local agglomerate. It is shown that with an increase in the proportion of unfluxed pellets (up to 60%) in a loading charge in order to achieve the required blast furnace slag basicity charging limestone into the furnace is necessary. In order to reduce the weight of loaded “raw” limestone, it is necessary to produce agglomerate with high basicity. As the proportion of pellets increases in a loaded charge, there is a reduction in blast furnace slag magnesia content. In order to increase slag magnesium oxide concentration, it is expedient during agglomerate preparation to use a combined basic flux consisting of 70% normal and 30% dolomitized limestone.