PULVERIZED COAL AND IRON-ORE INJECTION IN THE BLAST-FURNACE

Survey of the previous tests for the injection of coal and iron ore. D escription of a combustion plant for the investigation of the combusti on behaviour of coal and the reduction behaviour of iron ores under bl ast furnace similar conditions. Charged coal and ore mixtures (gas coa l/Carajas ore, gas coal Fabrica ore, anthracite coal/Carajas ore, anth raicite coal/Fabrica ore, gas coal/sponge iron, gas coal/wustite, anth racite coal/wustite). Combustion properties of the coal iron ore mixtu res as a function of the O/C ratio. Analysis of the various steps on t he combustion process and of the reduction behaviour of the iron ores on the basis of the experimental results and additional scanning elect ron microscope investigations of the combustion ashes.