Abstract:
Knowing the reduction of the concentration of iron in the mineral load extracted in the last decades and, therefore, greater need for comminution processes, there is no denying that iron ores tend to get increasingly thin for steelmakers. In Reactors such as Blast Furnace and others of fusion-reduction, where the reduction of the iron ore for the metallic iron for the steel production occurs, we observed that one of the alternatives is to agglomerate the raw materials in the form of briquettes, improving the kinetics of the chemical reactions, since ores in the form of fines impair factors such as the permeability required for reduction. These agglomerates are composed of a reducer, fines of ferrous materials and a binder material, and require, in addition to satisfactory Metallization, mechanical resistance, avoiding losses when the compound is fragmented during transport or during its deposition in the Steel Reactor. In the following work, Briquettes were produced with 65% Charcoal, 25% Pellet Feed, 6% Molasses Cane and 4% Hydrated Lime. After adjusting the granulometry of the coal to less than 170 ° and mixing the materials manually, the process of pressing the blends was started, this step being carried out under different pressure conditions (1.2 and 3 tons) and pressing time ( 20,60 and 100 seconds), aiming, through fall tests, to analyze the influence of these two variables on the mechanical resistance of the briquettes generated.