CN106947844A - A kind of Slag modification method - Google Patents
A kind of Slag modification method Download PDFInfo
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- CN106947844A CN106947844A CN201710303914.9A CN201710303914A CN106947844A CN 106947844 A CN106947844 A CN 106947844A CN 201710303914 A CN201710303914 A CN 201710303914A CN 106947844 A CN106947844 A CN 106947844A
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- Prior art keywords
- slag
- high alumina
- modification method
- processes
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/12—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on oxides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention provides a kind of Slag modification method, comprises the following steps：Using one heat steel water as base, during converter tapping, 480~520kg limes and 80~120kg high alumina slag adjusting agents are added；In LF processes, 280~320kg corundum slags and 500~1000kg limes are added when heating is entered the station, 380~420kg high alumina slag adjusting agents are added in 1min before heating terminates；In RH processes, 80~120kg high alumina slag adjusting agents are added in the top of the slag after application of vacuum terminates.The application can form the ladle top slag of low melting point using above-mentioned Slag modification method, and the ladle top slag of formation can play a part of residue adjustment, effectively reduce ladle top slag oxidisability, can effectively adsorb slag inclusion, reduce Als scaling loss, the final degree of purity for improving molten steel.
Description
Technical field
The present invention relates to technical field of smelting, more particularly to a kind of Slag modification method.
Background technology
Current smelting suprelow carbon steel uses desulfurization-converter-LF-RH-CC processing route, wherein, desulfurization is to pass through
Blowing device is got to magnesium powder and active lime in molten steel, the sulphur in molten steel is removed by chemically reacting, LF processes are exactly to steel
Water is heated, and RH processes are exactly application of vacuum, and CC processes are exactly casting process, and molten steel is cast into strand, ingot casting is finally given.Should
The Slag modification method of processing route is specially：Lime 1000kg, high alumina slag adjusting agent 100kg, in electrical heating are added in converter tapping
When add lime 1000kg, before heating terminates 1min add high alumina slag adjusting agent 400kg, then to vacuum carry out decarburization deoxygenated alloy
Change, application of vacuum adds 100kg high alumina slag adjusting agents after terminating in the top of the slag.The ladle top slag fusing point of above-mentioned residue adjustment method formation exists
More than 1600 DEG C, slag crust is pushed up after electrical heating and application of vacuum serious, it is impossible to play a part of residue adjustment.
The content of the invention
Present invention solves the technical problem that being to provide a kind of Slag modification method, the Slag modification method that the application is provided can improve steel
The degree of purity of water.
In view of this, this application provides a kind of Slag modification method, comprise the following steps：
Using one heat steel water as base, during converter tapping, add 480~520kg limes and 80~120kg high aluminas are adjusted
Slag agent；
In LF processes, 280~320kg corundum slags and 500~1000kg limes are added when heating is entered the station, in heating knot
380~420kg high alumina slag adjusting agents are added before beam during 1min；
In RH processes, 80~120kg high alumina slag adjusting agents are added in the top of the slag after application of vacuum terminates.
It is preferred that, the one heat steel water is 200~230t.
It is preferred that, during converter tapping, the addition of the lime is 500kg, the high alumina slag adjusting agent plus
Enter amount for 100kg.
It is preferred that, in LF processes, the addition of the corundum slag is 300kg, and the addition of lime is 1000kg, high alumina
The content of slag adjusting agent is 400kg.
It is preferred that, in RH processes, the content of high alumina slag adjusting agent is 100kg.
It is preferred that, during converter tapping, the high alumina slag adjusting agent includes：26wt%~34wt% Al, surplus
CaO and CaF.
It is preferred that, in LF processes, the high alumina slag adjusting agent includes：26wt%~34wt% Al, the CaO of surplus and
CaF。
It is preferred that, in RH processes, the high alumina slag adjusting agent includes：26wt%~34wt% Al, the CaO of surplus and
CaF。
This application provides a kind of Slag modification method, comprise the following steps：Using one heat steel water as base, in the process of converter tapping
In, add 480~520kg limes and 80~120kg high alumina slag adjusting agents；In LF processes, when heating is entered the station add 280~
320kg corundum slags and 500~1000kg limes, 380~420kg high alumina slag adjusting agents are added in 1min before heating terminates；In RH
In process, 80~120kg high alumina slag adjusting agents are added in the top of the slag after application of vacuum terminates.The application by converter procedure,
LF processes and the species and addition that auxiliary agent is adjusted in RH processes, make CaO and Al2O3Certain ratio is reached, 7Al is formed2O3·
12CaO low melting point slags, abundant mixing of the aluminium in slag is conducive to after being conducive to improving the mobility of slag, the good fluidity of slag, from
And the oxidisability of ladle top slag is reduced, the scaling loss of the sour aluminum melting in molten steel is reduced after the slag oxidizing reduction of top, so as to reduce
Molten steel is mingled with, and finally improves the degree of purity of molten steel.
Embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, still
It should be appreciated that these descriptions are simply to further illustrate the features and advantages of the present invention, rather than to the claims in the present invention
Limitation.
In Ca-Al slag system, CaO and Al2O3Fusing point it is all higher, up to more than 2000 DEG C, liquid steel temperature only has 1600
DEG C or so, therefore CaO and Al2O3The inappropriate ladle top slag crust of ratio is serious, and mobility is poor, and fine aluminium cannot be introduced into slag
The purpose of reduction slag oxidisability is played, it is therefore necessary to ensure CaO and Al2O3Ratio it is suitable, 7Al could be formed2O3·
12CaO low melting point slags, to improve the mobility of slag.Therefore, this application provides a kind of Slag modification method, it is specially：
Using one heat steel water as base, during converter tapping, add 480~520kg limes and 80~120kg high aluminas are adjusted
Slag agent；
In LF processes, 280~320kg corundum slags and 500~1000kg limes are added when heating is entered the station, in heating knot
380~420kg high alumina slag adjusting agents are added before beam during 1min；
In RH processes, 80~120kg high alumina slag adjusting agents are added in the top of the slag after application of vacuum terminates.
CaO and Al in such scheme2O3Ratio it is suitable, form 7Al2O312CaO low melting point slags, it can be improved
The mobility of slag, the good fluidity of slag is conducive to aluminium fully to be mixed in slag, so as to reduce the oxidisability of ladle top slag, pushes up slag oxygen
The scaling loss of the sour aluminum melting in molten steel is reduced after the property changed reduction, is mingled with so as to reduce molten steel, finally improves the pure of molten steel
Degree.
General during steel melting to use desulfurization-converter-LF-RH-CC processing routes, the steel melting of the application is not yet
Exception, needs to carry out residue adjustment, to keep the degree of purity of molten steel during steel melting.
During residue adjustment, the auxiliary agent of addition is using one heat steel water as base, i.e., the addition of various materials is with one heat steel water
For unit.The one heat steel water is 200~230 tons.Lime 480~520kg and 80~120kg are added in converter tapping
High alumina slag adjusting agent；Above-mentioned lime is material well known to those skilled in the art with high alumina slag adjusting agent, and its application that originates does not enter
The special limitation of row, specifically, the high alumina slag adjusting agent includes：26wt%~34wt% Al, the CaO and CaF of surplus.In tool
In body embodiment, the addition of the lime is 500kg, and the addition of high alumina slag adjusting agent is 100kg.
In LF processes, 280~320kg of corundum slag, 500~1000kg of lime are added when electrical heating is entered the station, and in electricity
Heating terminates preceding 1min and adds 380~420kg of high alumina slag adjusting agent.In above process, corundum slag, lime and high alumina slag adjusting agent are
Material well known to those skilled in the art, originates to it to this application and has no particular limits, specifically, the high alumina residue adjustment
Agent includes：26wt%~34wt% Al, the CaO and CaF of surplus.In a particular embodiment, the addition of the corundum slag is
300kg, the addition of lime is 1000kg, and the addition of high alumina slag adjusting agent is 400kg.
It is during vacuum carries out decarburization deoxidation alloying, to be added after application of vacuum terminates in the top of the slag in RH processes
80~120kg high alumina slag adjusting agents.The high alumina slag adjusting agent is specifically included：26wt%~34wt% Al, the CaO and CaF of surplus.
In a particular embodiment, the content of the high alumina slag adjusting agent is 100kg.
The addition of above-mentioned auxiliary agent is added based on the molten steel of 200~230 tons of a stove.Meanwhile, above-mentioned mistake
Cheng Zhong, in converter procedure, LF processes and RH processes, simply the addition species and consumption of above-mentioned auxiliary agent are changed, its
It does not change, and the application is to other operations in said process without special limitation.
For a further understanding of the present invention, the Slag modification method that the present invention is provided is carried out specifically with reference to embodiment
Bright, protection scope of the present invention is not limited by the following examples.
Embodiment 1 is by taking melting M3A26 steel grades as an example, 210~225 tons of one heat steel water, during converter tapping, adds
Lime and high alumina slag adjusting agent, in LF processes, corundum slag and lime are added when heating is entered the station, 1min is added before heating terminates
High alumina slag adjusting agent；In RH processes, high alumina slag adjusting agent is added in the top of the slag after application of vacuum terminates.Added in said process
As shown in table 1, the performance of molten steel is as shown in table 1 after residue adjustment for specific auxiliary agent and content.
The Slag modification method of embodiment 2~4 is identical with embodiment, and the auxiliary agent added during specific residue adjustment is as shown in table 1.
The auxiliary agent and effect data table (kg) of the Slag modification method of 1 embodiment of table 1~4 addition
| Group | Converter lime | Converter slag adjusting agent | The outbound aluminium of vacuum | Finished product aluminium | Als scaling loss amounts |
| Embodiment 1 | 512 | 100 | 0.0342 | 0.028 | 0.0062 |
| Embodiment 2 | 498 | 100 | 0.0377 | 0.029 | 0.0087 |
| Embodiment 3 | 486 | 100 | 0.0391 | 0.033 | 0.0061 |
| Embodiment 4 | 521 | 100 | 0.0333 | 0.028 | 0.0053 |
The auxiliary agent and effect data table (continued) of the Slag modification method of 1 embodiment of table 1~4 addition
The explanation of above example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that pair
, under the premise without departing from the principles of the invention, can also be to present invention progress for those skilled in the art
Some improvement and modification, these are improved and modification is also fallen into the protection domain of the claims in the present invention.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (8)
1. a kind of Slag modification method, comprises the following steps：
Using one heat steel water as base, during converter tapping, 480~520kg limes and 80~120kg high alumina residue adjustments are added
Agent；
In LF processes, 280~320kg corundum slags and 500~1000kg limes are added when heating is entered the station, before heating terminates
380~420kg high alumina slag adjusting agents are added during 1min；
In RH processes, 80~120kg high alumina slag adjusting agents are added in the top of the slag after application of vacuum terminates.
2. Slag modification method according to claim 1, it is characterised in that the one heat steel water is 200~230t.
3. Slag modification method according to claim 1, it is characterised in that during converter tapping, the lime plus
Enter amount for 500kg, the addition of the high alumina slag adjusting agent is 100kg.
4. Slag modification method according to claim 1, it is characterised in that in LF processes, the addition of the corundum slag is
300kg, the addition of lime is 1000kg, and the content of high alumina slag adjusting agent is 400kg.
5. Slag modification method according to claim 1, it is characterised in that in RH processes, the content of high alumina slag adjusting agent is
100kg。
6. Slag modification method according to claim 1, it is characterised in that during converter tapping, the high alumina residue adjustment
Agent includes：26wt%~34wt% Al, the CaO and CaF of surplus.
7. Slag modification method according to claim 1, it is characterised in that in LF processes, the high alumina slag adjusting agent includes：
26wt%~34wt% Al, the CaO and CaF of surplus.
8. Slag modification method according to claim 1, it is characterised in that in RH processes, the high alumina slag adjusting agent includes：
26wt%~34wt% Al, the CaO and CaF of surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710303914.9A CN106947844A (en) | 2017-05-03 | 2017-05-03 | A kind of Slag modification method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710303914.9A CN106947844A (en) | 2017-05-03 | 2017-05-03 | A kind of Slag modification method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107686874A (en) * | 2017-09-11 | 2018-02-13 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for reducing ultra-low-carbon steel smelting process Als scaling loss |
| CN108179246A (en) * | 2018-01-29 | 2018-06-19 | 吉林建龙钢铁有限责任公司 | A kind of preparation process of crown plug cold formability steel |
| CN109252010A (en) * | 2018-11-22 | 2019-01-22 | 武汉钢铁有限公司 | Control the smelting process of IF steel top slag oxidizing |
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| KR100885118B1 (en) * | 2002-11-14 | 2009-02-20 | 주식회사 포스코 | Converter working method of phosphorous added low carbon steel using ladle slag |
| CN101956131A (en) * | 2009-07-16 | 2011-01-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of ultra-low carbon steel and ultra-low carbon steel plate |
| CN103898274A (en) * | 2012-12-28 | 2014-07-02 | 攀钢集团研究院有限公司 | Ultralow-sulfur steel smelting method |
| CN106148633A (en) * | 2016-07-28 | 2016-11-23 | 攀钢集团攀枝花钢铁研究院有限公司 | The stable control method of aluminum content in a kind of IF steel |
-
2017
- 2017-05-03 CN CN201710303914.9A patent/CN106947844A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100885118B1 (en) * | 2002-11-14 | 2009-02-20 | 주식회사 포스코 | Converter working method of phosphorous added low carbon steel using ladle slag |
| CN101956131A (en) * | 2009-07-16 | 2011-01-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of ultra-low carbon steel and ultra-low carbon steel plate |
| CN103898274A (en) * | 2012-12-28 | 2014-07-02 | 攀钢集团研究院有限公司 | Ultralow-sulfur steel smelting method |
| CN106148633A (en) * | 2016-07-28 | 2016-11-23 | 攀钢集团攀枝花钢铁研究院有限公司 | The stable control method of aluminum content in a kind of IF steel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107686874A (en) * | 2017-09-11 | 2018-02-13 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for reducing ultra-low-carbon steel smelting process Als scaling loss |
| CN108179246A (en) * | 2018-01-29 | 2018-06-19 | 吉林建龙钢铁有限责任公司 | A kind of preparation process of crown plug cold formability steel |
| CN109252010A (en) * | 2018-11-22 | 2019-01-22 | 武汉钢铁有限公司 | Control the smelting process of IF steel top slag oxidizing |
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Application publication date: 20170714 |