METHOD OF STABILIZING POWDERY STEEL MAKING SLAG AND STABILIZED STEEL MAKING SLAG

摘要

PROBLEM TO BE SOLVED: To provide a method of stabilizing powdery steel making slag by turning the powdery steel making slag having high expansion factor to powdery steel making slag having low expansion factor. SOLUTION: The powdery steel making slag which contains≥60 mass% one having≤1 mm particle diameter and has≥3% volume expansion factor is controlled to contain≥10 mass% and≤25 mass% water and is held for≥5 hr while a gas containing carbon dioxide is supplied at a rate of≥5 Nm3/hr and≤100 Nm3/hr expressed in terms of pure carbon dioxide per 1 ton slag. As a result, the powdery steel making slag attains≤1.5% volume expansion factor and is used in place of a civil engineering material such as natural sand, crushed sand or the like. COPYRIGHT: (C)2008,JPO&INPIT