Steam condensation tower for a granulation installation

A granulation installation for granulating molten material produced in a metallurgical plant, said installation comprising:

• a water injection device, for injecting granulation water into a flow of molten material and thereby granulating the molten material;
• a granulation tank for collecting the granulation water and the granulated material;
• a steam condensation tower located above said granulation tank, for collecting steam generated in said granulation tank, said steam condensation tower having an external shell with a top cover and a steam condensing system that includes
• a water-spraying device for spraying water droplets into said steam condensation tower, and
• a water-collecting device located in said steam condensation tower below said water-spraying device, for collecting sprayed water droplets and condensed steam;
• said collecting device dividing said tower into an upper zone, in which steam can condense, and a lower zone through which steam can rise from said granulation tank into said upper zone;
• the installation further comprising
• a stack having at least a portion thereof extending into said steam condensation tower and configured for selectively evacuating excessive steam to the atmosphere, said stack having an inlet arranged to communicate with said lower zone of said condensation tower and an outlet arranged to release steam at or above the level of said top cover of said condensation tower.