Method for minimizing reductive decomposition of iron ore and iron ore agglomerates used as furnace charging

摘要

Fe ores or Fe ore aggreates are treated with reagents which prevent or lower grain decomposition on reduction at 400-600 deg.C in a blast furnace. The reagents are halogen-containing solutions or halogen- containing solids and are added to the ores or agglomerates. The reagents can be used as solutions, sea water or sea water-like liquids containing 0.1-50 g/l halogen. The aggregates or ores can be sprayed with or immersed in a bath containing the halogen compound in solution. The halogen compound treated ores or aggregates are produced before washing out with water.