Method for granulating a metallurgical slag

US12319983B2 · kind B2 · utility

Assignee

• SMS group GmbH · DE

Inventors

• Rolf Degel · Ratingen, DE
• Timm LUX · Meerbusch, DE
• Alexander Bergs · Rheine, DE
• Nikolaus Peter Kurt BOROWSKI · Düsseldorf, DE

Key dates

• Filing date: Jan 28, 2021
• Grant date: Jun 3, 2025
• Expiry date: Jul 23, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21B2400/08
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for the granulation of a metallurgical slag includes blowing, from a blower or air nozzle, heated air onto liquid slag to atomize the liquid slag and subsequently form granulated slag as the atomized slag cools. The granulated slag is blown into and collected by a working chamber. In order to ensure a high quality of the granulated slag and operate in an energy-efficient manner, the atomization is provided by blowing a heated air jet free from the addition of water onto the liquid slag. The granulated slag particles are collected in the floor region of the working chamber. Air that is released from the working chamber is either supplied to a heat exchanger, which further heats the air jet blown onto the liquid slag, or the released air is directly recirculated to the blower or air nozzle in order to atomize the supply of liquid slag.