| 摘要 |
PROBLEM TO BE SOLVED: To provide a neutralization treatment method which allows an efficient neutralization treatment by reducing the use amount of a neutralizing agent such as hydrated lime, in a neutralization treatment, performed for discharging a process solution generated in a metal refining process to the outside of a system.SOLUTION: The neutralization treatment is carried out using, as a neutralizing agent for a solution discharged in the metal refining process, boiler ash obtained after the combustion of a fluidized-bed boiler, which is produced by burning a sulfur content derived from coal, which is a fuel, while desulfurizing the sulfur content by adding lime stone to the sulfur content. |
