Ideal Behavior of Sinter Block Densification and Relation Thereof to Yield and Strength in Iron Ore Sintering

Abstract

The authors assumed an ideal manner of sinter block densification due to increase in melt volume, and explained thereby changes in sinter strength and yield with operational factors such as ore porosity, CaO/Fe₂O₃ ratio and coke content.
Based on knowledge of liquid phase sintering, they drew polygonal lines to describe the change of sinter block strength with melt volume, which comprised two line segments for rapid and slow densification regions, where the position of broken point and the slope of later line segment reflected ore porosity as more porous ores sifted the broken point to more melt volume side and less strength and allowed the slope to turn from negative to positive.
After assuming a block strength distribution in sinter cake, they illustrated that relative location of the distribution curve to a polygonal line was to determine a sinter strength and a sintering yield, and predicted a disaccording manner of sinter strength to sintering yield and overmelting phenomena as a result of pairing of distribution curve's transformation to line segment's slope in the slow densification region.