Rotary bed-type electric furnace
US-10746467-B2 · Aug 18, 2020 · US
Method for producing an iron melt
US2024344155A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2024344155-A1 |
| Application number | US-202218682221-A |
| Country | US |
| Kind code | A1 |
| Filing date | Aug 22, 2022 |
| Priority date | Aug 30, 2021 |
| Publication date | Oct 17, 2024 |
| Grant date | — |
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- Title
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Abstract
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The present disclosure relates to a process for producing an iron melt. The method includes; reducing iron ore to sponge iron, carburizing sponge iron with a carbonaceous gas, melting the carburized sponge iron and/or treating the melt produced from the carburized sponge iron. According to the present disclosure, the carbonaceous gas is at least a portion of the process gas obtained in the melting of the carburized sponge iron and/or treating of the melt produced from the carburized sponge iron that has been recycled.
First claim
Opening claim text (preview).
1 . A method process for producing an iron melt, comprising the steps of: reducing iron ore to sponge iron, carburizing sponge iron with a carbonaceous gas, at least one of melting the carburized sponge iron and/or treating the melt produced from the carburized sponge iron, wherein the carbonaceous gas is at least a portion of a process gas obtained in the at least one of the melting of the carburized sponge iron and/or treating of the melt produced from the carburized sponge iron that has been recycled. 2 . The method process as claimed in claim 1 , wherein the reduction is effected using a hydrogenous reduction gas. 3 . The method process as claimed in claim 2 , wherein the hydrogenous reduction gas is heated to a temperature between 50° and 1200° C. 4 . The method process as claimed in claim 2 , wherein the melting is conducted in an electrical reduction furnace. 5 . The method as claimed in claim 3 , wherein the melting is conducted in a blast furnace. 6 . The method of claim 5 , wherein the carbonaceous gas is fed in at a temperature below 100° C. to cool the sponge iron. 7 . The method of claim 5 , wherein the carbonaceous gas is fed in at a temperature of at least 500° C. to heat the sponge iron. 8 . The method of claim 5 , wherein the iron ore passes through a shaft furnace in vertical direction. 9 . The method of claim 8 , wherein the sponge iron is one of cooled and heated in the lower portion of the shaft furnace. 10 . The method of claim 7 , wherein the iron ore is reduced in at least one fluidized bed reactors and the sponge iron is carburized in at least one fluidized bed reactors. 11 . A method for producing an iron melt, comprising the steps of: reducing iron ore to sponge iron; carburizing sponge iron with a carbonaceous gas, the carbonaceous gas being at least partially recycled carbonaceous gas; melting the carburized sponge iron; and treating the melt produced from the carburized sponge iron; wherein the carbonaceous gas is of a process gas obtained in the melting of the carburized sponge iron and treating of the melt produced from the carburized sponge iron is the at least partially recycled carbonaceous gas. 12 . The method as claimed in claim 11 , wherein the reduction is effected using a hydrogenous reduction gas. 13 . The method as claimed in claim 12 , wherein the hydrogenous reduction gas is heated to a temperature between 50° and 1200° C. 14 . The method as claimed in claim 12 , wherein the melting is conducted in an electrical reduction furnace. 15 . The method as claimed in claim 14 , wherein the melting is conducted in a blast furnace. 16 . The method of claim 15 , wherein the carbonaceous gas is fed in at a temperature below 100° C. to cool the sponge iron. 17 . The method of claim 15 , wherein the carbonaceous gas is fed in at a temperature of at least 500° C. to heat the sponge iron.
Assignees
Inventors
Classifications
Handling of exhaust gases produced during the manufacture of iron or steel · CPC title
wherein iron or steel is obtained in a molten state · CPC title
Conditioning, transformation of reduced iron ores · CPC title
In fluidised bed furnaces or apparatus containing a dispersion of the material · CPC title
Making spongy iron or liquid steel, by direct processes · CPC title
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- What does patent US2024344155A1 cover?
- The present disclosure relates to a process for producing an iron melt. The method includes; reducing iron ore to sponge iron, carburizing sponge iron with a carbonaceous gas, melting the carburized sponge iron and/or treating the melt produced from the carburized sponge iron. According to the present disclosure, the carbonaceous gas is at least a portion of the process gas obtained in the melt…
- Who is the assignee on this patent?
- Thyssenkrupp Steel Europe Ag
- What technology area does this patent fall under?
- Primary CPC classification C21B13/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Oct 17 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).