CN115807147A - Improved Consedi electric furnace for smelting steel slag and iron slag and smelting method - Google Patents
Improved Consedi electric furnace for smelting steel slag and iron slag and smelting method Download PDFInfo
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- CN115807147A CN115807147A CN202211638677.9A CN202211638677A CN115807147A CN 115807147 A CN115807147 A CN 115807147A CN 202211638677 A CN202211638677 A CN 202211638677A CN 115807147 A CN115807147 A CN 115807147A
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- slag
- electric furnace
- smelting
- iron
- steel
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000002893 slag Substances 0.000 title claims abstract description 108
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 57
- 238000003723 Smelting Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000007664 blowing Methods 0.000 claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 230000001427 coherent effect Effects 0.000 claims abstract description 5
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 238000009628 steelmaking Methods 0.000 claims abstract description 4
- 239000011449 brick Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims 3
- 238000007885 magnetic separation Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000006260 foam Substances 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses an improved Consisti electric furnace for smelting steel slag and iron slag and a smelting method, and relates to the field of metal smelting. The electric furnace comprises an electric furnace body, wherein a feed inlet of the electric furnace body is provided with horizontal continuous feeding equipment; the bottom of the non-eccentric area of the electric furnace body is provided with a bottom blowing system, the side wall of the eccentric area of the electric furnace body is provided with a carbon gun, and a consumable carbon-oxygen gun is arranged at a front steelmaking platform of the electric furnace body; the furnace wall oxygen lance on the water-cooled furnace wall of the electric furnace body is an oxygen combustion injection coherent oxygen lance. The bottom blowing system is arranged, so that the dynamic conditions in the furnace are enhanced, the melting speed of the slag iron furnace charge is accelerated, and the smelting period is shortened. According to the invention, the carbon gun is arranged in the eccentric area, so that the submerged arc operation of foam slag making in the eccentric area is realized, the smelting efficiency is improved, and the smelting period is shortened; effectively reduces the smelting power consumption of the electric furnace.
Description
Technical Field
The invention relates to the field of metal smelting, in particular to an improved Consisti electric furnace for smelting steel slag and iron and a smelting method.
Background
The common smelting process of the Consedi electric furnace is full scrap steel electric arc furnace smelting, scrap steel heating and molten iron charging electric arc furnace smelting, and the like, the charging of the scrap steel or hot molten iron into the furnace is relatively stable, but the raw material pig iron or scrap steel is high in purchase cost, and in smelting, the smelting period of the Consedi electric furnace is long, the electric consumption of the electric furnace is high, so that the overall cost for smelting the scrap steel by adopting the Consedi electric furnace is high.
The slag iron slag is a byproduct generated in the smelting process of a blast furnace and a converter, and the slag is discarded as waste for a long time, occupies land and pollutes the environment. The slag steel slag iron is used as a raw material for smelting, so that the production cost of an enterprise can be effectively reduced, but the slag steel slag iron belongs to non-standard products and has unstable indexes (including metal iron content corresponding to size and variety and the like). When the slag steel and slag iron are applied to the Consisti electric furnace smelting, the yield of the smelted molten steel is low due to the characteristics of more slag steel and slag iron varieties and unbalanced and unstable incoming materials, the smelting period is difficult to control, the smelting efficiency is low, and the technical and economic indexes of smelting are difficult to improve.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an improved Consisti electric furnace for smelting steel slag and iron slag in an electric furnace, which shortens the smelting period of the electric furnace and reduces the power consumption, and a smelting method.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the improved Consedi electric furnace for smelting steel slag and iron slag comprises an electric furnace body, wherein a feed inlet of the electric furnace body is provided with horizontal continuous feeding equipment; the bottom of the non-eccentric area of the electric furnace body is provided with a bottom blowing system, the side wall of the eccentric area of the electric furnace body is provided with a carbon gun, and a consumable carbon-oxygen gun is arranged at a front steelmaking platform of the electric furnace body; the furnace wall oxygen lance on the water-cooled furnace wall of the electric furnace body is an oxygen combustion injection coherent oxygen lance.
Further, the bottom blowing system comprises three bottom blowing air bricks which are respectively connected with the air supply pipeline; three bottom-blown air bricks are uniformly and circumferentially distributed along the center of an electrode pole center circle in a non-eccentric area of the electric furnace body.
A smelting method of an improved Consisti electric furnace for smelting steel slag and iron slag comprises the following steps:
s1: pretreating steel slag iron slag;
s2: adding the pretreated slag steel iron slag into the electric furnace body through horizontal continuous feeding equipment;
s3: smelting the slag steel and the slag iron by using an improved Considel electric furnace;
s4: the steel retention amount during tapping is 40-50%.
Furthermore, the content of the metallic iron in the slag steel slag iron is more than or equal to 70 percent.
Further, the step S1 comprises the step of crushing, magnetically separating, smashing or cutting the slag steel slag iron to ensure that the lumpiness of the slag steel slag iron is less than or equal to 600mm multiplied by 600mm, and the mass of each block of the slag steel slag iron is less than or equal to 500kg.
Further, when the improved Consedi electric furnace is used for smelting steel slag and iron slag in the step S3, the consumable carbon-oxygen gun extends into the improved Consedi electric furnace from a furnace door of the improved Consedi electric furnace, and the consumable carbon-oxygen gun is used for blowing oxygen and spraying carbon powder to the steel slag and iron slag in the furnace.
The invention has the beneficial effects that:
the bottom blowing system is arranged, so that the dynamic conditions in the furnace are enhanced, the melting speed of the slag iron furnace burden is accelerated, and the smelting period is shortened.
According to the invention, the carbon gun is arranged in the eccentric area, so that carbon powder is sprayed in the eccentric area to make foam slag to realize submerged arc operation, the smelting efficiency is improved, and the smelting period is shortened; effectively reduces the smelting power consumption of the electric furnace.
The invention can realize oxygen blowing fluxing by adopting the oxygen combustion blowing coherent oxygen lance on the furnace wall oxygen lance, thereby accelerating the decarburization of the steel slag and the iron slag and shortening the smelting period.
Drawings
FIG. 1 is a schematic top view of the internal structure of an electric furnace body.
Wherein, 1, the electric furnace body; 2. bottom-blown air brick; 3. a carbon gun; 4. a furnace door consumable carbon-oxygen gun; 5. an oxygen lance on the wall of the furnace.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in figure 1, the improved Consisti electric furnace for smelting steel slag and iron slag comprises an electric furnace body 1, wherein a horizontal continuous feeding device is arranged at a feeding hole of the electric furnace body 1; a bottom blowing system is arranged at the bottom of a non-eccentric area of the electric furnace body 1, a carbon gun 3 is arranged on the side wall of the eccentric area of the electric furnace body 1, and a consumable carbon-oxygen gun 4 is arranged at a stokehole steelmaking platform of the electric furnace body 1; three furnace wall oxygen lances 5 are arranged on the water-cooled furnace wall of the electric furnace body 1 and are all oxygen combustion injection coherent oxygen lances.
The bottom blowing structure comprises three bottom blowing air bricks 2, and the three bottom blowing air bricks 2 are respectively connected with an air supply pipeline; the three bottom-blown air bricks 2 are uniformly and circumferentially distributed along the center of an electrode pole center circle of a non-eccentric area of the electric furnace body 1.
A smelting method of an improved Consisti electric furnace for smelting steel slag and iron slag comprises the following steps:
s1: pretreating the slag steel and slag iron to meet the requirement of the size of horizontally and continuously feeding materials into the furnace;
s2: adding the pretreated slag steel iron slag into the electric furnace body through horizontal continuous feeding equipment;
s3: smelting the slag steel and the slag iron by using an improved Considel electric furnace;
s4: the steel retention amount during tapping is 40-50%.
The content of the metal iron in the slag steel is more than or equal to 70 percent.
The step S1 comprises the steps of crushing, magnetically separating, smashing or cutting the slag steel slag iron to ensure that the lumpiness of the slag steel slag iron is less than or equal to 600mm multiplied by 600mm, and the mass of each block of the slag steel slag iron is less than or equal to 500kg.
In the step S3, when the improved Consedi electric furnace is used for smelting the steel slag and iron slag, the consumable carbon-oxygen lance 4 extends into the furnace from the furnace door of the improved Consedi electric furnace, and the consumable carbon-oxygen lance 4 is used for blowing oxygen and spraying carbon powder to the steel slag and iron slag in the furnace.
During actual smelting, when slag steel slag iron is pretreated, slag in the slag steel slag iron needs to be screened and removed, the slag content of the slag steel slag iron is reduced, and fine materials are fed into a furnace. In order to avoid the situation that the slag cannot be closed in the final melting stage and the oxidation stage, the furnace capacity is fully considered when the furnace body of the Consedi electric furnace is built, and the slag flowing amount in the smelting process is reduced, so that conditions are created for realizing submerged arc operation of spraying carbon powder to make foam slag.
Claims (6)
1. An improved Consisti electric furnace for smelting steel slag and iron slag is characterized by comprising an electric furnace body (1), wherein a horizontal continuous feeding device is arranged in a feeding mode of the electric furnace body (1); a bottom blowing system is arranged at the bottom of a non-eccentric area of the electric furnace body (1), a carbon gun (3) is arranged on the side wall of the eccentric area of the electric furnace body (1), and a consumable carbon-oxygen gun (4) is arranged at a steelmaking platform in front of the electric furnace body (1); the furnace wall oxygen lance (5) on the water-cooled furnace wall of the electric furnace body (1) is an oxygen combustion injection coherent oxygen lance.
2. The improved Consisti electric furnace according to claim 1, characterized in that said bottom-blowing system comprises three bottom-blowing gas permeable bricks (2), said three bottom-blowing gas permeable bricks (2) being connected to gas supply pipes, respectively; the three bottom-blowing air bricks (2) are uniformly and circumferentially distributed along the center of an electrode pole center circle of a non-eccentric area of the electric furnace body (1).
3. A method of smelting using the improved constanta electric furnace of any one of claims 1 to 2 for smelting slag steel and slag iron, comprising the steps of:
s1: pretreating the slag iron and steel slag;
s2: adding the pretreated slag steel iron slag into the electric furnace body through horizontal continuous feeding equipment;
s3: smelting the slag steel and the slag iron by using an improved Considel electric furnace;
s4: the steel retention amount during tapping is 40-50%.
4. The improved Considel electric furnace smelting process for smelting slag steel and slag iron of claim 3, wherein the metallic iron content in the slag steel and slag iron is 70% or greater.
5. The improved Consisti electric furnace smelting method for smelting slag steel and slag iron as claimed in claim 3, wherein said step S1 includes subjecting the slag steel and slag iron to crushing, magnetic separation, smashing or cutting to make the lumpiness of the slag steel and slag iron less than or equal to 600mm x 600mm, and the mass of each piece of the slag steel and slag iron is less than or equal to 500kg.
6. The improved Consedi electric furnace for smelting slag steel and slag iron as claimed in claim 3, wherein in step S3, when the improved Consedi electric furnace is used for smelting slag steel and slag iron, the consumable carbon-oxygen lance (4) is extended into the furnace from the furnace door of the improved Consedi electric furnace, and the consumable carbon-oxygen lance (4) is used for blowing oxygen and spraying carbon powder to the slag steel and slag iron in the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211638677.9A CN115807147A (en) | 2022-12-19 | 2022-12-19 | Improved Consedi electric furnace for smelting steel slag and iron slag and smelting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211638677.9A CN115807147A (en) | 2022-12-19 | 2022-12-19 | Improved Consedi electric furnace for smelting steel slag and iron slag and smelting method |
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| Publication Number | Publication Date |
|---|---|
| CN115807147A true CN115807147A (en) | 2023-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211638677.9A Pending CN115807147A (en) | 2022-12-19 | 2022-12-19 | Improved Consedi electric furnace for smelting steel slag and iron slag and smelting method |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418970A (en) * | 2002-12-19 | 2003-05-21 | 北京科技大学 | Oxygen blasting powder spraying melting asistance technology for electric furnace steelmaking and making foam slag technology thereof |
| KR20120132903A (en) * | 2011-05-30 | 2012-12-10 | 현대제철 주식회사 | Lance device for supplying oxygen and carbon source in electric furnace |
| CN103014231A (en) * | 2012-12-28 | 2013-04-03 | 攀枝花钢城集团瑞钢工业有限公司 | Oxygen supplying method for smelting slag steel and slag iron by electric arc furnace |
| CN112760449A (en) * | 2020-12-22 | 2021-05-07 | 鞍钢铸钢有限公司 | Smelting method of slag steel used by Consteel electric furnace |
| CN114015831A (en) * | 2021-10-22 | 2022-02-08 | 张家港宏昌钢板有限公司 | Smelting method for improving end point carbon of high-carbon steel of electric furnace |
-
2022
- 2022-12-19 CN CN202211638677.9A patent/CN115807147A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418970A (en) * | 2002-12-19 | 2003-05-21 | 北京科技大学 | Oxygen blasting powder spraying melting asistance technology for electric furnace steelmaking and making foam slag technology thereof |
| KR20120132903A (en) * | 2011-05-30 | 2012-12-10 | 현대제철 주식회사 | Lance device for supplying oxygen and carbon source in electric furnace |
| CN103014231A (en) * | 2012-12-28 | 2013-04-03 | 攀枝花钢城集团瑞钢工业有限公司 | Oxygen supplying method for smelting slag steel and slag iron by electric arc furnace |
| CN112760449A (en) * | 2020-12-22 | 2021-05-07 | 鞍钢铸钢有限公司 | Smelting method of slag steel used by Consteel electric furnace |
| CN114015831A (en) * | 2021-10-22 | 2022-02-08 | 张家港宏昌钢板有限公司 | Smelting method for improving end point carbon of high-carbon steel of electric furnace |
Non-Patent Citations (1)
| Title |
|---|
| 杨虎林等: "60tCONSTEEL电弧炉用氧技术改造", 《河南冶金》, vol. 19, no. 2, pages 305 - 306 * |
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