Method for granulating a metallurgical slag

A method for the granulation of a metallurgical slag, the method comprising:

• blowing, from a blower, heated air onto a supply of liquid slag such that the liquid slag is transformed to atomized slag, wherein atomization is provided by blowing the heated air free of water onto the liquid slag;
• directing the atomized slag into a single working chamber in which the atomized slag forms into granulated slag particles which are collected in a floor region of the single working chamber;
• releasing, from the single working chamber, the heated air either to a heat exchanger, which further heats the released air and directs the further heated released air to an air inlet of the blower for blowing onto the liquid slag, or directly recirculating the released air from the single working chamber to the air inlet of the blower in order to atomize the liquid slag;
• and
• wherein the supply of the liquid slag and the blowing of heated air from the blower onto the liquid slag occurs in a first section of the single working chamber and the granulated slag particles accumulate in a second section of the single working chamber, at a distance from the first section, wherein the released air from the single working chamber is removed from the single working chamber in a region of the first section, and wherein the first section and the second section of the single working chamber are separated from each other by a baffle plate located in a ceiling region of the single working chamber, wherein a portion of energy contained in the released air is used to supply a consumer.