METHOD FOR INHIBITING FOAMING OF MOLTEN SLAG AND METHOD FOR MANUFACTURING SLAG PRODUCT

摘要

2Provided is a method whereby it is possible to effectively alleviate foaming of molten slag removed from a converter type refining furnace to a molten slag storage container in an intermediate slag removal step so that the intermediate slag removal step can be performed in a short time in refining of molten iron in which two oxygen feeding refining steps and an intermediate slag removal step interposed therebetween are performed continuously using a single converter type refining furnace. During and/or after slag removal in the intermediate slag removal step a water jet stream 8 having a momentum per unit time of 50 kg·m/s or greater is jetted to slag stored in the molten slag storage container and a flow is imparted to the slag so that water droplets are drawn into the foaming slag and foaming of the slag is thereby alleviated. The water droplets drawn into and dispersed in the slag evaporate/expand and thereby break the slag foam and vapor contained in a foamed slag bath 6 is released to the outside of the foamed slag bath 6 and foaming of the slag is thereby alleviated.