CN103333980A - Method for recycling casting residues - Google Patents
Method for recycling casting residues Download PDFInfo
- Publication number
- CN103333980A CN103333980A CN2013102921124A CN201310292112A CN103333980A CN 103333980 A CN103333980 A CN 103333980A CN 2013102921124 A CN2013102921124 A CN 2013102921124A CN 201310292112 A CN201310292112 A CN 201310292112A CN 103333980 A CN103333980 A CN 103333980A
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- Prior art keywords
- slag
- converter
- molten steel
- molten iron
- casting
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- 238000005266 casting Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004064 recycling Methods 0.000 title abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000002893 slag Substances 0.000 claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- 229910052742 iron Inorganic materials 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000009749 continuous casting Methods 0.000 claims abstract description 12
- 238000003723 Smelting Methods 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 5
- 238000009628 steelmaking Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 6
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 6
- 239000004571 lime Substances 0.000 abstract description 6
- 230000033764 rhythmic process Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000003203 everyday effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 5
- 229910052751 metal Inorganic materials 0.000 abstract 5
- 230000001133 acceleration Effects 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 238000007885 magnetic separation Methods 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
-
- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a method for recycling casting residues, wherein the clearance control of the liquid level of molten iron in a molten iron tank requires that the position from a pouring opening to the liquid level is more than 500mm, and then the molten iron tank is fixed on a recycling tank seat through a straddle trolley and a molten iron receiving bay in sequence; collecting continuous casting residues by using the hot-metal ladle, wherein the waiting time of the hot-metal ladle is not more than 2 hours; the hot metal ladle sequentially passes through the span trolley and the molten steel receiving span, molten iron in the hot metal ladle is added into the converter, single slag operation is adopted for converter smelting, and finally molten steel is produced. The invention has the advantages that: the recovery of the liquid slag is limited by the production rhythm, so about 10 cans can be recovered every day, the continuous casting liquid slag is recovered to a hot metal ladle and then added into a converter, and the liquid slag contains partial free CaO and Al2O3The method can provide partial slag amount and CaO, is beneficial to earlier-stage slag acceleration of the converter, simultaneously reduces the addition amount of lime, recycles residual molten steel left by casting and saves the production cost.
Description
Technical field
The present invention relates to a kind of metallurgical slag recycling method, relate in particular to a kind of residual casting slag recoverying and utilizing method.
Background technology
Residual casting slag is the inevitable outcome in the steel manufacture process, residual casting slag is that big jar carries out in the casting process in order to prevent that the slag in big jar from entering tundish in the continuously cast bloom production technique, pollute steel quality, be about to end casting when casting finishes at molten steel, remain in the slag steel reinforced concrete compound in big jar.The slag steel reinforced concrete compound of this part contains molten steel and the slag of some.Traditional technology is that the slag mixture with this part directly ploughs under slag ladle, and the cooling of fetching water then is to be cooled after room temperature, and slag is separated, and bulk slag steel sorts out and returns steel making working procedure and carry out secondary smelting; Separate slag and enter the magnetic separation line and carry out magnetic separation, the magnetic separation slag that comes out enters steel making working procedure equally and uses as the metallic substance of smelting, and the residue tailings is retained stand-by.
Utilize in the traditional technology of residual casting slag and have certain problem, produce the environmental improvement problem that reentrainment of dust causes in cooled discharging and the sepn process of slag steel, repeatedly have bad luck with the magnetic separation process and cause energy consumption, main is that this kind utilizes the mode utilising efficiency low, do not meet the main flow direction of iron and steel enterprise's green manufacturing, do not meet the demand that reduces the metallurgy industry production cost.
How the high-level efficiency utilization is the direction that the metallargist studied in recent years always at residual casting slag, and part steel mill ploughs under preparation through LF refining procedure residual casting slag and enters again in the molten steel jar of LF refining procedure, enters the LF refining procedure then and produces.This kind way of recycling not only can take full advantage of remaining molten steel, can also utilize the high basicity slag to replace partial furnaceman LF slag making materials of planting, save part flux cost, but there is certain problem in this kind way of recycling, molten steel jar headroom control accuracy needs to strengthen, leave certain space and volume must for the slag that reclaims, guarantee that the molten steel jar leaves safe clearance; Still need nearly LF refining procedure for utilizing again, for the many steel mills of refinery practice kind, suitability is not strong, and the utilization ratio of residual casting slag is not high; There is certain difficulty in organization of production, and steel-making is smelted, rhythm of production control all needs to carry out special treatment, needs painstakingly tissue, can't form normalization orderly management and popularization.
Summary of the invention
For overcoming the deficiencies in the prior art, the purpose of this invention is to provide a kind of residual casting slag recoverying and utilizing method, effective, the stable residual casting slag that utilizes liquid continuous casting reduces steel-making flux resource consumption, reduces the melting expense of making steel.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of residual casting slag recoverying and utilizing method in the converter steelmaking, is recycled the residual casting slag of continuous casting working procedure at steel making working procedure, may further comprise the steps:
1) control of molten iron liquid level headroom requires to irritate mouthful to liquid level position greater than 500mm in the iron ladle, strides chassis by crossing successively then, molten steel receives and strides, and iron ladle is fixed on the recovery fangs;
2) utilize described iron ladle to collect the continuous casting residual casting slag, the iron ladle waiting time is no more than 2 hours;
3) iron ladle is striden chassis by crossing successively, molten steel receives and strides, and the molten iron in the iron ladle is blended into converter, and converter smelting adopts single-slag operation, last output molten steel.
Compared with prior art, the invention has the beneficial effects as follows:
Liquid slag reclaims and limited by rhythm of production, so can reclaim about 10 jars every day, the continuous casting liquid slag is blended into converter after being recovered to iron ladle, owing to contain CaO and the Al of part free state in the liquid slag
2O
3, the part quantity of slag and CaO can be provided, and be conducive to the converter pre-slag and early change, reduce the lime add-on simultaneously, reclaim the remaining remaining molten steel of casting, the benefit of saving lime and reclaiming steel scrap is integrated, escapable cost was 172.7 ten thousand yuan in every month.
Description of drawings
Fig. 1 is the continuous casting working procedure layout drawing.
Embodiment
Following the present invention describes in detail, but should be noted that enforcement of the present invention is not limited to following embodiment.
See Fig. 1, the residual casting slag recoverying and utilizing method in the converter steelmaking, is recycled the residual casting slag of continuous casting working procedure at steel making working procedure, may further comprise the steps:
1) control of molten iron liquid level headroom requires to irritate mouthful to liquid level position greater than 500mm in the iron ladle, strides chassis by crossing successively then, molten steel receives and strides, and iron ladle is fixed on the recovery fangs;
2) utilize described iron ladle to collect the continuous casting residual casting slag, the iron ladle waiting time is no more than 2 hours;
3) iron ladle is striden chassis by crossing successively, molten steel receives and strides, and the molten iron in the iron ladle is blended into converter, and converter smelting adopts single-slag operation, last output molten steel.
Liquid slag reclaims and limited by rhythm of production, so can reclaim about 10 jars every day, the continuous casting liquid slag is blended into converter after being recovered to iron ladle, owing to contain CaO and the Al of part free state in the liquid slag
2O
3, the part quantity of slag and CaO can be provided, and be conducive to the converter pre-slag and early change, reduce the lime add-on simultaneously, reclaim the remaining remaining molten steel of casting.
Can find that by on-the-spot actually operating the normal running of lime consumption rate reduces 8kg/t, the flux cost of saving was 38.9 ten thousand yuan by 300 jars of calculating of tissue recovery in every month.Because contain small amount of molten steel in the casting later stage molten steel jar, remaining molten steel is added up (price is pressed the steel scrap calculation of price) by 2 tons in each molten steel jar, will save lime and reclaim 172.7 ten thousand yuan/month of steel scraps.
Claims (1)
1. a residual casting slag recoverying and utilizing method is characterized in that, in the converter steelmaking, the residual casting slag of continuous casting working procedure is recycled at steel making working procedure, may further comprise the steps:
1) control of molten iron liquid level headroom requires to irritate mouthful to liquid level position greater than 500mm in the iron ladle, strides chassis by crossing successively then, molten steel receives and strides, and iron ladle is fixed on the recovery fangs;
2) utilize described iron ladle to collect the continuous casting residual casting slag, the iron ladle waiting time is no more than 2 hours;
3) iron ladle is striden chassis by crossing successively, molten steel receives and strides, and the molten iron in the iron ladle is blended into converter, and converter smelting adopts single-slag operation, last output molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102921124A CN103333980A (en) | 2013-07-12 | 2013-07-12 | Method for recycling casting residues |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102921124A CN103333980A (en) | 2013-07-12 | 2013-07-12 | Method for recycling casting residues |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103333980A true CN103333980A (en) | 2013-10-02 |
Family
ID=49242176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102921124A Pending CN103333980A (en) | 2013-07-12 | 2013-07-12 | Method for recycling casting residues |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103333980A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004884A (en) * | 2014-06-12 | 2014-08-27 | 鞍钢股份有限公司 | Operation method for recycling continuous casting residual steel slag from hot-metal ladle |
| CN105087853A (en) * | 2015-09-21 | 2015-11-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for steel-making and slagging of semi-steel in converter |
| CN105506226A (en) * | 2014-09-26 | 2016-04-20 | 鞍钢股份有限公司 | Method for carrying out pre-desiliconization, pre-decarburization and pre-dephosphorization on molten iron in molten iron tank |
| CN105969931A (en) * | 2016-06-27 | 2016-09-28 | 江苏永钢集团有限公司 | Recycling method for large ladle of residues |
| CN107012293A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | Method for improving LF furnace temperature rise efficiency and reducing solvent consumption |
| CN107138723A (en) * | 2017-06-15 | 2017-09-08 | 中冶华天南京工程技术有限公司 | A kind of molten iron ladle pouring system and method based on the remaining steel line of return |
| CN109609721A (en) * | 2018-12-19 | 2019-04-12 | 钢铁研究总院 | A kind of method that converter recycles the hot casting residue of ladle |
| CN109797338A (en) * | 2019-02-11 | 2019-05-24 | 黑龙江建龙钢铁有限公司 | A kind of big packet of square billet process pours remaining back to half ladle semisteel smelting technique |
| CN113102712A (en) * | 2021-04-15 | 2021-07-13 | 马鞍山钢铁股份有限公司 | Steel ladle casting residue recycling method suitable for ultra-low carbon steel |
| CN114317870A (en) * | 2020-09-29 | 2022-04-12 | 宝山钢铁股份有限公司 | Method for directly returning hot-state casting residue to converter |
| CN115491444A (en) * | 2022-08-30 | 2022-12-20 | 马鞍山钢铁股份有限公司 | Method for preventing ladle from sticking and splashing by returning ladle casting residue to converter in hot state |
| CN115786621A (en) * | 2022-10-17 | 2023-03-14 | 山西太钢不锈钢股份有限公司 | Method for pretreating and dephosphorizing molten iron |
-
2013
- 2013-07-12 CN CN2013102921124A patent/CN103333980A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004884A (en) * | 2014-06-12 | 2014-08-27 | 鞍钢股份有限公司 | Operation method for recycling continuous casting residual steel slag from hot-metal ladle |
| CN105506226A (en) * | 2014-09-26 | 2016-04-20 | 鞍钢股份有限公司 | Method for carrying out pre-desiliconization, pre-decarburization and pre-dephosphorization on molten iron in molten iron tank |
| CN105087853A (en) * | 2015-09-21 | 2015-11-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for steel-making and slagging of semi-steel in converter |
| CN107012293A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | Method for improving LF furnace temperature rise efficiency and reducing solvent consumption |
| CN105969931A (en) * | 2016-06-27 | 2016-09-28 | 江苏永钢集团有限公司 | Recycling method for large ladle of residues |
| CN107138723B (en) * | 2017-06-15 | 2023-01-13 | 中冶华天南京工程技术有限公司 | Molten iron reladling system and method based on residual steel return line |
| CN107138723A (en) * | 2017-06-15 | 2017-09-08 | 中冶华天南京工程技术有限公司 | A kind of molten iron ladle pouring system and method based on the remaining steel line of return |
| CN109609721A (en) * | 2018-12-19 | 2019-04-12 | 钢铁研究总院 | A kind of method that converter recycles the hot casting residue of ladle |
| CN109797338A (en) * | 2019-02-11 | 2019-05-24 | 黑龙江建龙钢铁有限公司 | A kind of big packet of square billet process pours remaining back to half ladle semisteel smelting technique |
| CN114317870A (en) * | 2020-09-29 | 2022-04-12 | 宝山钢铁股份有限公司 | Method for directly returning hot-state casting residue to converter |
| CN113102712A (en) * | 2021-04-15 | 2021-07-13 | 马鞍山钢铁股份有限公司 | Steel ladle casting residue recycling method suitable for ultra-low carbon steel |
| CN115491444A (en) * | 2022-08-30 | 2022-12-20 | 马鞍山钢铁股份有限公司 | Method for preventing ladle from sticking and splashing by returning ladle casting residue to converter in hot state |
| CN115491444B (en) * | 2022-08-30 | 2024-01-30 | 马鞍山钢铁股份有限公司 | Method for preventing ladle from adhering and splashing by hot return of ladle casting residue to converter |
| CN115786621A (en) * | 2022-10-17 | 2023-03-14 | 山西太钢不锈钢股份有限公司 | Method for pretreating and dephosphorizing molten iron |
| CN115786621B (en) * | 2022-10-17 | 2024-04-05 | 山西太钢不锈钢股份有限公司 | Dephosphorization method for molten iron pretreatment |
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Application publication date: 20131002 |
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