| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for recovering a calcium-containing solid component from steel slag, making it possible to easily improve a calcium recovery rate.SOLUTION: The steel slag is immersed in aqueous solution comprising carbon dioxide, and calcium in the steel slag is eluted in the aqueous solution. Then, the immersed steel slag is removed from the aqueous solution, and thereafter, the pH of the aqueous solution is increased. The solid component thus deposited is recovered, which makes it possible to recover the solid component containing calcium of 20 mass% or more in terms of atom.SELECTED DRAWING: Figure 1 |
