| 摘要 |
PROBLEM TO BE SOLVED: To provide: a water granulation nozzle capable of easily performing grain-coarsening of water-granulated slag when the water-granulated slag is formed by subjecting molten slag to water granulation; and a grain-coarsening method for water-granulated slag using the water granulation nozzle.SOLUTION: A water granulation nozzle is configured to jet water-granulation water, which is used for making molten slag discharged from a metal smelting process into water-granulated slag, to the molten slag. A front surface part of the water granulation nozzle includes: approximately rectangular water-granulation water injection ports that further project than the front surface part of the water granulation nozzle and are respectively disposed on three stages; and a plurality of high-pressure water injection ports that are disposed below the water-granulation water injection ports and are communicated with the front surface part of the water granulation nozzle. |
