Combined system for producing steel and method for operating the combined system

• Main Authors: KOLBE, Bärbel, ACHATZ, Reinhold, GEHRMANN, Stefan, KRÜGER, Matthias Patrick, SCHMÖLE, Peter, WAGNER, Jens, OLES, Markus, KLEINSCHMIDT, Ralph
• Format: Patent
• Language: English
• Published: 03.09.2020
• Subjects: CHEMISTRY; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON

The invention relates to a plant complex for steel production comprising a blast furnace (1) for producing pig iron, a converter steel works (2) for producing crude steel, a gas-conducting system for gases that occur when producing the pig iron and/or producing the crude steel, and a power-generating plant (3) for electricity generation. The power-generating plant (3) is designed as a gas turbine power-generating plant or gas-turbine and steam-turbine power generating plant and is operated with a gas that comprises at least a partial amount of the blast-furnace top gas (7) that occurs in the blast furnace (1) when producing the pig iron and/or a partial amount of the converter gas (9) that occurs in the converter steel works (2). According to the invention, the plant complex additionally comprises a chemical plant (12) and a biotechnological plant (13), the power-generating plant (3), the chemical plant (12) and the biotechnological plant (13) being arranged in a parallel setup with regard to the gas supply. The gas-conducting system comprises an operationally controllable gas-distributing device (14) for dividing the streams of gas that are fed to the power-generating plant (3), the chemical plant (12) and the biotechnological plant (13). The subject of the invention is also a method for operating the plant complex. Fig. 1