METHOD FOR ACCELERATING AGING OF SLAG COOLED SLOWLY IN BLAST FURNACE

摘要

PURPOSE:To accelerate the aging of slag cooled slowly in a blast furnace by adding an oxidizing agent to the slag. CONSTITUTION:MnO2 as an oxidizing agent is dispersed in water and added to slag cooled slowly in a blast furnace to complete the aging of the slag in a short time. The amount of MnO2 to be added is =0.01wt%, and in order to produce a sufficient effect, MnO2 is added by =0.02wt%. A reaction for finally converting CaS in the slag into a sexivalent S compound represented by the equation is accelerated, and the production of yellow water is prevented. Hydrogen peroxide, org. peroxide, an iorn compound, a nitrogen compound or the like may be used as the oxidizing agent in place of MnO2.