An immersion device is provided for molten metal, as well as a method for making steel. The immersion device allows a trouble free operation. The immersion device includes a measuring head, a carrier for the measuring head, and a lance detachably connected to the carrier, preferably by a detachable tubular connecting element. A gas path runs from the lance to the detachable tubular connecting element. A gas tight connection is provided between a connecting surface of the lance and the detachable tubular connecting element. The tubular connecting element has wipers in the form of fins, which wipe the connecting surface of the lance during attaching and/or detaching the tubular connecting element and the lance.

An immersion device is provided for molten metal, as well as a method for making steel. The immersion device allows a trouble free operation. The immersion device includes a measuring head, a carrier for the measuring head, and a lance detachably connected to the carrier, preferably by a detachable tubular connecting element. A gas path runs from the lance to the detachable tubular connecting element. A gas tight connection is provided between a connecting surface of the lance and the detachable tubular connecting element. The tubular connecting element has wipers in the form of fins, which wipe the connecting surface of the lance during attaching and/or detaching the tubular connecting element and the lance.

There is provided a method for manufacturing a duplex stainless steel sheet having reduced inclusions through argon oxygen decarburization (AOD), ladle treatment (LT), and twin roll strip casting. The method includes deoxidizing molten steel using silicon (Si) during the AOD, wherein the molten steel has a silicon (Si) content of 0.55 wt % to 0.75 wt % at the end of the AOD.

An argon oxygen decarburization (AOD) refining method for molten austenitic stainless steel includes, preparing molten austenitic stainless steel in an electric arc furnace, pouring the molten austenitic stainless steel into an AOD refining furnace by adjusting a carbon concentration of the molten austenitic stainless steel to 2.0 wt % to 2.5 wt %, decarburizing the poured molten austenitic stainless steel by blowing oxygen (O.sub.2) and argon (Ar) thereinto, and reduction-decarburizing the decarburized molten austenitic stainless steel by blowing argon (Ar) thereinto.

After molten metal has been poured from a ladle 6 into a converter, metal 6b adhering to the ladle 6 is dropped into the ladle 6 on-line, and molten metal is poured from an electric furnace into the ladle 6 into which the metal 6b has been dropped. As a result, the metal 6b is melted and is recovered as a material.

A method of recovering Fe from steel-making slag is disclosed. The method includes the steps of melting steel-making slag having a higher Fe content than iron-making slag by heating the steel-making slag to a first temperature; cooling the molten slag to a second temperature that is lower than the first temperature and then maintaining the same at the second temperature for a predetermined time to thus precipitate Fe in the molten slag, thereby forming and growing an Fe-rich phase; rapidly cooling the slag to room temperature; and crushing the solidified slag and magnetically separating a magnetically-susceptible portion from a magnetically-unsusceptible portion.

A method of recovering Fe from steel-making slag is disclosed. The method includes the steps of melting steel-making slag having a higher Fe content than iron-making slag by heating the steel-making slag to a first temperature; cooling the molten slag to a second temperature that is lower than the first temperature and then maintaining the same at the second temperature for a predetermined time to thus precipitate Fe in the molten slag, thereby forming and growing an Fe-rich phase; rapidly cooling the slag to room temperature; and crushing the solidified slag and magnetically separating a magnetically-susceptible portion from a magnetically-unsusceptible portion.

A metallurgical container (1) includes an outer wall (2), at least one connection element (4) for an electrode which is to be connected and/or a support element which is to be connected, and at least one transponder (3) which is surrounded by a protective housing (6) and can be read wirelessly. The transponder (3) is at a distance from the outer wall (2) on the container (1).

A metallurgical container (1) includes an outer wall (2), at least one connection element (4) for an electrode which is to be connected and/or a support element which is to be connected, and at least one transponder (3) which is surrounded by a protective housing (6) and can be read wirelessly. The transponder (3) is at a distance from the outer wall (2) on the container (1).

Cooling system and method suitable for cooling a blast furnace with a cooling fluid during its operation. The cooling system includes a source of a gaseous fluid that feeds the gaseous fluid to multiple flow paths. A liquid is atomized into each of the multiple flow paths, within which the atomized liquid is mixed with the gaseous fluid to form a mist. The system further includes means for selectively closing each of the multiple flow paths while at least one other of the multiple flow paths remains open.