| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a production method by which recycled slag available as a slag-making agent can be produced at a low cost by modifying ladle desulfurization slag.SOLUTION: The production method for recycled slag is provided for modifying slag having a basicity of 1.5 or more and 10 or less, an AlOcontent of 15 mass% or more and 40 mass% or less and a T.Fe content of 10 mass% or less. The production method comprises the steps of: discharging the slag into a slag receiving vessel on the conditions of satisfying the following formula (1) while maintaining a temperature of 1000°C or more; and sprinkling water to the discharged slag having a temperature of 200°C or more so as to satisfy the following conditions (A), (B) and (C). E/M≥2.0 ... (1) (where, E is an area (m) in which the discharged slag is exposed to the atmosphere, and M is the mass (t) of the discharged slag.) (A) an S content in the discharged slag is 0.1 mass% or less. (B) A mass ratio of water deposited on a discharged slag surface layer in the discharged slag is 2 mass% or less. (C) A mass ratio of water hydrated in the discharged slag is 6 mass% or less.</p> |
