INSTALLATION AND METHOD FOR PROCESSING MOLTEN MATERIAL PRODUCED BY A METALLURGICAL PLANT, IN PARTICULAR FOR PROCESSING BLAST FURNACE SLAG

摘要

An installation (100) for processing a metallurgical melt, in particular blast furnace slag, comprises at least one granulation unit (110; 120), which produces slurry of granulates and water, and a main dynamic dewatehng unit (130) connected downstream the granulation unit. The main dewatering unit (130) comprises a mobile component, in particular a rotary dewatering drum (132), for separating slurry into granulatesand water. According to the invention, the installation includes: - a slurry overflow (150) arranged upstream of or at the inlet of the main dewatering unit (130) and upstream of the water outlet (142), from which water is recovered from the main dewatering unit (130), this overflow being configured for draining slurry in excess of the unit's dewatering capacity; - a secondary dewatering unit (160) having an inlet (162) connected for receiving excess slurry from the overflow, a first outlet (164) for returning a secondary dewatered fraction to the main dewatering unit and a second outlet (166) for recovering water. The installation is configured to drain excess slurry so as to preclude excess slurry from reaching the water outlet (142) and to separate drained excess slurry into a secondary dewatered fraction returned to the main dewatering unit (130) and into a secondary water fraction recovered without passing through the main dynamic dewatering unit (130). A corresponding method of processing molten material, in particular for granulating blast furnace slag, is also proposed.