A ferrosilicon inoculant for gray cast iron containing between 0.1 to 10% by weight strontium, less than 0.35% by weight calcium, 1.5 to 10% by weight aluminum and 0.1 to 15% zirconium, The inoculant, method for producing the inoculant, method for inoculating the melt and a gray cast iron inoculated with the inoculant are covered.

The invention relates to a plant complex for steel production comprising a blast furnace for producing pig iron, a converter steel mill for producing crude steel and a gas-conducting system for gases that occur in the production of pig iron and/or in the production of crude steel. According to the invention, the plant complex additionally has a chemical or biotechnological plant connected to the gas-conducting system and a plant for producing hydrogen. The plant for producing hydrogen is connected to the gas-conducting system by a hydrogen-carrying line. Also the subject of the invention is a method for operating the plant complex.

The invention relates to a plant complex for steel production comprising a blast furnace for producing pig iron, a converter steel mill for producing crude steel and a gas-conducting system for gases that occur in the production of pig iron and/or in the production of crude steel. According to the invention, the plant complex additionally has a chemical or biotechnological plant connected to the gas-conducting system and a plant for producing hydrogen. The plant for producing hydrogen is connected to the gas-conducting system by a hydrogen-carrying line. Also the subject of the invention is a method for operating the plant complex.

Method and apparatus for producing direct reduced iron (DRI) powder or molten iron from iron ore fines by mixing said iron ore fines with hydrogen and oxygen and igniting the mixture in a flame reactor with flame temperatures controlled to produce solid iron powder or molten iron.

Method and apparatus for producing direct reduced iron (DRI) powder or molten iron from iron ore fines by mixing said iron ore fines with hydrogen and oxygen and igniting the mixture in a flame reactor with flame temperatures controlled to produce solid iron powder or molten iron.

A steel strip is produced by melting a steel melt containing (In wt. %): C: 0.1 to <0.3; Mn: 4 to <8; Al: >1 to 2.9; P: <0.05; S: <0.05; N: <0.02; remainder iron including unavoidable steel-associated elements. The steel melt is cast to form a pre-strip or to form a slab and heated to a rolling temperature of 1050 to 1250? C. or in-line rolling out of the casting heat. The pres-strip or slab is hot rolled into a hot strip having a thickness of 12 to 0.8 mm, at a final rolling temperature of 1050 to 800? C. The hot strip is reeled at a temperature of more than 200 to 800? C., pickled, annealed for an annealing time of 1 min to 48 h and at a temperature of 540 to 840? C., and cold rolled at room temperature or elevated temperature in at least one rolling pass.

A method for treating molten cast iron includes, performing an inoculation treatment to the molten cast iron, with the use of an inoculant containing: 15 to 80 wt % Si; either 80 to 100 wt % purity La or 80 to 100 wt % purity Ce as RE; Ca; Al; and the balance Fe with inevitable impurities, by adding the inoculant to the molten cast iron such that: the addition amount of La or Ce relative to the molten cast iron is 0.001 to 0.009 wt %; the addition amount of Ca relative to the molten cast iron is 0.001 to 0.02 wt %; and the addition amount of Al relative to the molten cast iron is 0.001 to 0.02 wt %.

Method and apparatus for producing direct reduced iron (DRI) powder or molten iron from iron ore fines by mixing said iron ore fines with hydrogen and oxygen and igniting the mixture in a flame reactor with flame temperatures controlled to produce solid iron powder or molten iron.

Provided is an iron-based amorphous alloy and a method of manufacturing the same. More particularly, provided is an high carbon iron-based amorphous alloy expressed by a general formula Fe.sub.C.sub.SiBxPyCrz, wherein , , , x, y and z are atomic % of iron (Fe), carbon (C), silicon (Si), boron (B), phosphorus (P), and chrome (Cr) respectively, wherein is expressed by =100(++x+y+z) atomic %, is expressed by 13.5 atomic %17.8 atomic %, is expressed by 0.30 atomic %1.50 atomic %, x is expressed by 0.1 atomic %x4.0 atomic %, y is expressed by 0.8 atomic %y7.7 atomic %, and z is expressed by 0.1 atomic %z3.0 atomic %.

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.