Abstract
Coke in a blast furnace has many significant functions such as a heat source, a spacer for a stable gas and liquid flow, a carburization agent for modifying the dripping behavior of metal and a reducing agent of iron ore. As the blast furnace operation moved into a more difficult stage where a high productivity and a high level of pulverized coal injection is demanded in a large volume blast furnace, coke strength has been considered important. On the other hand, the blending ratio of slightly caking coal has been increased in cokemaking process to meet cost reduction. With the development of cokemaking technology, reactivity of coke is attracting attention in terms of improving blast furnace reaction efficiency and reducing CO2 emission. In this paper, reviewed are how production technology of highly reactive coke and improvement in blast furnace reaction efficiency through the use of highly reactive coke have developed.
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