TREATMENT METHOD FOR REMOVING SULFUR IN SLAG CONTAINING SULFUR

摘要

PROBLEM TO BE SOLVED: To provide a method for easily and inexpensively removing a sulfur component from sulfur-containing slag with high efficiency.SOLUTION: This treatment method for removing sulfur in slag comprises: preparing a blast furnace smelting water that is brought into contact with molten slag in a blast furnace and has a pH of 8 or more; reducing a pH of the blast furnace smelting water to less than a pH of 8 by exposing the blast furnace smelting water to air; and then bringing the blast furnace smelting water into contact with slag containing sulfur while controlling a temperature of the blast furnace smelting water so as to be in a range of 15°C or higher and 80°C or lower in the presence of oxygen, to remove a sulfur component contained in the slag.