Method for operating a plant network
AssigneeThyssenKrupp Steel Europe AG
InventorsCaroline Biedermann, Matthias Jonas Fabry, Marius Großarth, Daniel Schubert, Matthias Weinberg
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Abstract
A method is described for operating a plant network comprising a direct reduction plant with a sluice and an electric melt furnace. In the method, a product property is determined by a sensor, and on the basis of this, the degree of metallization of the sponge iron in the direct reduction plant is set. To carry out the method, a control device can be used, for example to control a flow valve via an allocation amount by the return element indicated by reference sign, in order to change the degree of metallization via the setting of the flow rate of reducing gas.
Claims18
A method for operating a plant network comprising at least one direct reduction plant and an electric melt furnace arranged downstream of the direct reduction plant,
- wherein, during continuous operation of the plant network,
- iron ore passes through the direct reduction plant, wherein, when passing through the direct reduction plant, the iron ore is reduced to sponge iron by means of reducing gas to a degree of metallization MGDRA, and after passing through the sponge iron, which has the degree of metallization MGDRA, is introduced into the melt furnace, wherein
- the sponge iron is melted in the melt furnace while adding carbon carriers to form a molten bath of metal melt that has a product degree of metallization MGproduct and a slag floating on the metal melt, and metal melt is removed from the melt furnace in discrete succession by tapping the melt,
- wherein
- a product property of the product produced in the plant network is determined continuously or quasi-continuously by means of a sensor, and
- a change in the operation of the plant network is carried out depending on the determined product properties in order to adjust the degree of metallization MGDRA to a specified target value for the degree of metallization MGDRA, target.
Dependencies are inferred from the claim text.