METHOD FOR TREATING HIGH TEMPERATURE SLAG

摘要

PROBLEM TO BE SOLVED: To provide a method for treating high temperature slag with which the slag can be recovered as valuables without generating a dust-generating problem and strong basic water in the treating process and further, without needing the long time in this treatment. SOLUTION: The high temperature slag containing CaO exhausted from a furnace is classified after drying-type cooling from the hot-state and the coarse grains having low CaO content and the fine grains having high CaO content are obtained. The cooling is desired to make two-step coolings of a primary-cooling and a secondary-cooling and the primary-cooling sprays the cooling water in a cooling box 2 and the water-cooling in the range which does not generate free water can be obtained. The secondary-cooling is desired to perform the air-cooling method in a dry-type cooling device 3. The coarse grains having low CaO content and the fine grains having high CaO content can be obtained by classifying the crushed slag with the secondary-cooling. COPYRIGHT: (C)2008,JPO&INPIT