Described is a device for recovering heat and fumes from slag resulting from the steel production cycle which allows the heat emitted by the slag during the cooling to be used without the need to collect the slag in tubs which must then be transported to the cooling surface and tipped in order to discharge the slag; at the same time, this device allows the fumes and consequently the heat and the pollutants which the slag emits during the tipping and the time on the cooling surface to be conveyed and treated.

A method of ironmaking using full-oxygen hydrogen-rich gas which includes hot transferring and hot charging the high-temperature coke, sinter and pellet into the ironmaking furnace through transferring and charging device, and injecting oxygen and hydrogen-rich combustible gas at a predetermined temperature into the ironmaking furnace through the oxygen tuyere and the gas tuyere disposed at the ironmaking furnace, respectively. It also provides an apparatus for ironmaking using full-oxygen hydrogen-rich gas which includes a raw material system, a furnace roof gas system, a coke oven gas injecting system, a dust injecting system, a slag dry-granulation and residual heat recovering system and an oxygen system. Additionally an apparatus and method for hot transferring and hot charging of ironmaking raw material is disclosed.

A method for producing hydrogen and/or other gases from steel plant wastes and waste heat is disclosed. The method comprises the steps of providing molten waste from steel plant like molten slag in a reactor. The molten slag is contacted with water and/or steam in the presence of a reducing agent to form a stream of hydrogen and/or other gases. The hydrogen and/or other gases can then be extracted from the stream of gases from the reactor.

Methods and systems are provided for extracting and utilizing the energy contained in molten slags generated from metal producing operations. The energy is extracted while the slag is contained within a vessel, such as, a slag pot, after the slag has been discharged from a furnace. The energy is accessed by immersing into the slag a thermally stable treatment vessel, such as, a vessel made of graphite, having an internal cavity. The energy from the slag is transmitted by direct contact of the slag with the surface of the treatment vessel. The treatment vessel and slag may be moved relative to each other to overcome the low thermal conductivity of the slag. Any substance placed within the internal cavity is heated without directly contacting the molten slag. The methods and systems provide for high temperature chemical reactions, energy conversions, or transfer operations within the internal cavity.

Methods and systems are provided for extracting and utilizing the energy contained in molten slags generated from metal producing and refining operations. The energy is extracted while the slag is contained within a containment vessel, such as a slag pot, after the slag has been discharged from a furnace. The energy is accessed by immersing into the slag a temperature-resistant treatment vessel, such as, a cylindrical vessel made of graphite, having an internal cavity. The energy from the slag is transmitted by direct contact with the surface of the treatment vessel. The treatment vessel and slag may be moved relative to each other to overcome the low thermal conductivity of the slag. Any substance placed within the cavity is thereby heated without directly contacting the molten slag. The methods and systems provide for high temperature chemical reactions, energy conversions, or transfer operations within the internal cavity.

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.