METHOD OF MODIFYING STEEL SLAG AND STEEL SLAG

摘要

PROBLEM TO BE SOLVED: To modify steel slag at low costs in a short time, without transfer, as it is at high temperatures.SOLUTION: Steel slag in a molten state is kept in high-temperature water of 50°C or higher for a specified time to modify it, and the steel slag of grain sizes of 30 mm or smaller is recovered. Preferably, the steel slag in a molten state is reduced in grain sizes, poured into the high-temperature water and kept in the high-temperature water for a specified time to modify it. The grain sizes may be reduced to 10 mm or smaller by causing water to collide with the steel slag in a molten state, or the grain sizes may be reduced to 5 mm or smaller by causing a gas to collide with the steel slag in a molten state. The procedure allows modification of the steel slag at low costs in a short time, without transfer, as it is at high temperatures.