CN105969943A - Short process method of recycling LF liquid refining slag in thermal-state steel ladle - Google Patents
Short process method of recycling LF liquid refining slag in thermal-state steel ladle Download PDFInfo
- Publication number
- CN105969943A CN105969943A CN201610506141.XA CN201610506141A CN105969943A CN 105969943 A CN105969943 A CN 105969943A CN 201610506141 A CN201610506141 A CN 201610506141A CN 105969943 A CN105969943 A CN 105969943A
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- CN
- China
- Prior art keywords
- stove
- slag
- molten steel
- refining slag
- ladle
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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
- 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
-
- 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
Abstract
The invention provides a short process method of recycling LF liquid refining slag in a thermal-state steel ladle. After molten steel is refined through new slag manufactured for the first time, the sulphur distribution coefficient of the slag and steel is far lower than a theoretical balance value, and the slag can be reused. After the molten steel is poured completely, through hoisting with a crown block, the liquid refining slag is mixed with the molten steel to be refined with the LF, and then the mixed molten steel is hoisted to the LF to be subjected to refining operation. Consumption of lime and fluorite can be reduced, rapid slagging is realized through the physical heat of the slag, electricity consumption is lowered, the cost can be reduced by 5 yuan per ton of steel, and residual molten steel obtained after pouring with a casting machine can be recycled.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, especially relate to a kind of LF stove liquid refining slag and return in hot ladle
Receive the Short flow method utilized.
Background technology
The important process link of LF stove refining process is slag making, by slagging process by harmful elements such as the sulfur in molten steel and oxygen
Transfer to slag is removed.But, due to the restriction of initial sulfur and refining time etc., the slag charge of addition the most fully profit
With, sulphur content distribution coefficient does not reaches theoretical equilibrium value, causes the biggest waste, if can be repeated by refining slag
Utilize, refining cost can be substantially reduced.
Therefore, how to be effectively improved the utilization rate of slag charge in LF stove refining process, reducing refining cost is current ability
Field technique personnel need badly and solve the technical problem that.
Summary of the invention
In view of this, it is an object of the invention to provide that a kind of LF stove liquid refining slag recycles in hot ladle is short
Flow and method, the method can be effectively improved the utilization rate of slag charge in LF stove refining process, reduces refining cost.
For solving above-mentioned technical problem, the technical scheme that the present invention provides is:
The Short flow method that a kind of LF stove liquid refining slag recycles in hot ladle, comprises the following steps:
1) molten steel after LF stove refine is after casting machine upper completes, and is continued by the LF stove liquid refining slag in ladle
Stay in ladle；
2) by step 1) in ladle retain LF stove liquid refining slag and the mixing of molten steel treating LF stove refine；
3) by step 2) in be mixed into the molten steel treating LF stove refine of LF stove liquid refining slag and be hoisted to LF refining furnace station,
Carry out LF stove refining operation, obtain target refined molten steel.
Preferably, by step 1) in the LF stove liquid refining slag retained of ladle pour into and contain the steel of molten steel treating LF stove refine
Bao Zhong.
Preferably, pour the molten steel treating LF stove refine into step 1) in retain and have in the ladle of LF stove liquid refining slag.
Preferably, described LF stove liquid refining slag includes following components in percentage by weight: the SiO of 16.5%～18.5%2；
The CaO of 54.5%～56.5%；The MgO of 7.5%～9.5%；The Al of 13.5%～15.5%2O3；The TFe of 0.45%～0.65%；
The S of 0.45%～0.65%；The P of 0.055%～0.075%.
Preferably, the LF stove liquid refining slag recycled for the first time is by LF stove refining process, adds granule
Calx, fluorite, refining slag and deoxidizer, and the white slag that argon bottom-blowing stirring is formed.
Preferably, described LF stove liquid refining slag can be recycled the LF stove refine of 2～3 stoves.
The invention provides the Short flow method that a kind of LF stove liquid refining slag recycles in hot ladle, for the first time
Making after new slag carries out LF stove refine to molten steel, the sulphur content distribution coefficient between slag steel does not reaches theoretical equilibrium value, permissible
Reuse, after molten steel has watered, by overhead traveling crane handling, LF liquid refining slag and the mixing of molten steel treating LF stove refine,
Then mixed molten steel is winched to LF stove and carry out refining operation, it is possible to reduce Calx and fluorite consumption, utilize the thing of slag
Reason heat, it is achieved rapid slagging, reduces power consumption, and steel per ton can reduce cost about 5 yuan/ton, and recyclable casting machine waters remaining
Molten steel.
Detailed description of the invention
In order to be further appreciated by the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should
Working as understanding, these descriptions simply further illustrate inventive feature and advantage rather than the limit to the claims in the present invention
System.
The invention provides the Short flow method that a kind of LF stove liquid refining slag recycles in hot ladle, including with
Lower step:
1) molten steel after LF stove refine is after casting machine upper completes, and is continued by the LF stove liquid refining slag in ladle
Stay in ladle；
2) by step 1) in ladle retain LF stove liquid refining slag and the mixing of molten steel treating LF stove refine；
3) by step 2) in be mixed into the molten steel treating LF stove refine of LF stove liquid refining slag and be hoisted to LF refining furnace station,
Carry out LF stove refining operation, obtain target refined molten steel.
In one embodiment of the invention, by step 1) in the LF stove liquid refining slag retained of ladle pour splendid attire into and treat LF
In the ladle of the molten steel of stove refine.
In one embodiment of the invention, pour the molten steel treating LF stove refine into step 1) in retain have LF stove liquid essence
In the ladle of refining slag, so the two is mixed, can improve and treat the molten steel of LF stove refine and mixing of LF stove liquid refining slag
Closing speed and mixing uniformity, after mixing, slag, during floating, carries out wash heat to molten steel, improves LF stove
Refining effect.
In one embodiment of the invention, described LF stove liquid refining slag includes following components in percentage by weight:
The SiO of 16.5%～18.5%2；The CaO of 54.5%～56.5%；The MgO of 7.5%～9.5%；The Al of 13.5%～15.5%2O3；
The TFe of 0.45%～0.65%；The S of 0.45%～0.65%；The P of 0.055%～0.075%.
In one embodiment of the invention, the LF stove liquid refining slag recycled for the first time is by LF stove refine
During, add lime, fluorite, refining slag and deoxidizer, and the white slag that argon bottom-blowing stirring is formed.
In one embodiment of the invention, described LF stove liquid refining slag can be recycled the LF stove refine of 2～3 stoves；
The LF stove refine of heat afterwards to make new slag, not in use by return slag.
Raw material that the present invention does not elaborates, method and device etc. are prior art.
In order to be further appreciated by the present invention, a kind of LF stove liquid refining slag provided the present invention below in conjunction with embodiment exists
The Short flow method recycled in hot ladle is described in detail, and protection scope of the present invention is not by following example
Limit.
Embodiment 1
The Short flow method that a kind of LF stove liquid refining slag recycles in hot ladle, comprises the following steps:
1) molten steel after LF stove refine is after casting machine upper completes, and continues to stay by the LF stove liquid refining slag in ladle
In ladle；Described LF stove liquid refining slag includes following components in percentage by weight: the SiO of 16.5%2；56.5%
CaO；The MgO of 7.5%；The Al of 15.5%2O3；The TFe of 0.45%；The S of 0.65%；The P of 0.055%；
2) by step 1) in the LF stove liquid refining slag retained of ladle pour into contain and treat in the ladle of molten steel of LF stove refine；
The inlet temperature of the molten steel of the described LF for the treatment of stove refine is 1580 DEG C；
3) by step 2) in be mixed into the molten steel treating LF stove refine of LF stove liquid refining slag and be hoisted to LF refining furnace station,
Carry out LF stove refining operation, obtain target refined molten steel.
Whole LF stove refining process consumes Calx 150kg, reduces 57.14% than traditional LF stove refine；Consume fluorite 40kg,
60% is reduced than traditional LF stove refine；Heating power consumption is 1494kwh, reduces 24.55% than traditional LF stove refine.
Embodiment 2
The Short flow method that a kind of LF stove liquid refining slag recycles in hot ladle, comprises the following steps:
1) molten steel after LF stove refine is after casting machine upper completes, and continues to stay by the LF stove liquid refining slag in ladle
In ladle；Described LF stove liquid refining slag includes following components in percentage by weight: the SiO of 18.5%2；54.5%
CaO；The MgO of 9.5%；The Al of 13.5%2O3；The TFe of 0.65%；The S of 0.45%；The P of 0.075%；
2) by step 1) in the LF stove liquid refining slag retained of ladle pour into contain and treat in the ladle of molten steel of LF stove refine；
The inlet temperature of the molten steel of the described LF for the treatment of stove refine is 1569 DEG C；
3) by step 2) in be mixed into the molten steel treating LF stove refine of LF stove liquid refining slag and be hoisted to LF refining furnace station,
Carry out LF stove refining operation, obtain target refined molten steel.
Whole LF stove refining process consumes Calx 150kg, reduces 57.14% than traditional LF stove refine；Consume fluorite 40kg,
60% is reduced than traditional LF stove refine；Heating power consumption is 1760kwh, reduces 11.11% than traditional LF stove refine.
Comparative example 1
Carry out LF stove refine, the return slag not using stove refine to produce traditionally, treat the molten steel of LF stove refine
Inlet temperature be 1570 DEG C, whole LF stove refining process consume Calx 350kg；Consume fluorite 100kg；Heating power consumption
For 1980kwh.
The explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.It should be pointed out that, for
For those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out
Some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.Right
Multiple amendment in these embodiments is apparent from for those skilled in the art, defined herein one
As principle can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, this
The bright the embodiments shown herein that is not intended to be limited to, and be to fit to and principles disclosed herein and features of novelty
Consistent widest range.
Claims (6)
1. the Short flow method that a LF stove liquid refining slag recycles in hot ladle, it is characterised in that include
Following steps:
1) molten steel after LF stove refine is after casting machine upper completes, and is continued by the LF stove liquid refining slag in ladle
Stay in ladle；
2) by step 1) in ladle retain LF stove liquid refining slag and the mixing of molten steel treating LF stove refine；
3) by step 2) in be mixed into the molten steel treating LF stove refine of LF stove liquid refining slag and be hoisted to LF refining furnace station,
Carry out LF stove refining operation, obtain target refined molten steel.
Short flow method the most according to claim 1, it is characterised in that by step 1) in ladle retain LF
Stove liquid refining slag is poured into and is contained in the ladle of molten steel treating LF stove refine.
Short flow method the most according to claim 1, it is characterised in that pour the molten steel treating LF stove refine into step
Rapid 1) retain in the ladle having LF stove liquid refining slag.
Short flow method the most according to claim 1, it is characterised in that described LF stove liquid refining slag include with
The component of lower percentage by weight: the SiO of 16.5%～18.5%2；The CaO of 54.5%～56.5%；The MgO of 7.5%～9.5%；
The Al of 13.5%～15.5%2O3；The TFe of 0.45%～0.65%；The S of 0.45%～0.65%；The P of 0.055%～0.075%.
Short flow method the most according to claim 1, it is characterised in that the LF stove liquid recycled for the first time
Refining slag is by LF stove refining process, adds lime, fluorite, refining slag and deoxidizer, and bottom blowing
The white slag that argon stirring is formed.
Short flow method the most according to claim 1, it is characterised in that described LF stove liquid refining slag is capable of circulation
Use the LF stove refine of 2～3 stoves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610506141.XA CN105969943A (en) | 2016-06-30 | 2016-06-30 | Short process method of recycling LF liquid refining slag in thermal-state steel ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610506141.XA CN105969943A (en) | 2016-06-30 | 2016-06-30 | Short process method of recycling LF liquid refining slag in thermal-state steel ladle |
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|---|---|
| CN105969943A true CN105969943A (en) | 2016-09-28 |
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ID=56954441
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610506141.XA Pending CN105969943A (en) | 2016-06-30 | 2016-06-30 | Short process method of recycling LF liquid refining slag in thermal-state steel ladle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107586916A (en) * | 2017-08-31 | 2018-01-16 | 日照钢铁控股集团有限公司 | High silicon discards recycling method of the refining slag in low silicon Aluminum steel |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041329A (en) * | 2009-10-12 | 2011-05-04 | 河南凤宝钢铁有限公司 | LF (Ladle Furnace) hot steel slag recycling process |
| CN102676743A (en) * | 2012-05-23 | 2012-09-19 | 莱芜钢铁集团有限公司 | Step-by-step returning recycling method of LF (Lactoferrin) refining slag in thermal state |
-
2016
- 2016-06-30 CN CN201610506141.XA patent/CN105969943A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041329A (en) * | 2009-10-12 | 2011-05-04 | 河南凤宝钢铁有限公司 | LF (Ladle Furnace) hot steel slag recycling process |
| CN102676743A (en) * | 2012-05-23 | 2012-09-19 | 莱芜钢铁集团有限公司 | Step-by-step returning recycling method of LF (Lactoferrin) refining slag in thermal state |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107586916A (en) * | 2017-08-31 | 2018-01-16 | 日照钢铁控股集团有限公司 | High silicon discards recycling method of the refining slag in low silicon Aluminum steel |
| CN107586916B (en) * | 2017-08-31 | 2019-05-24 | 日照钢铁控股集团有限公司 | High silicon discards recycling and reusing method of the refining slag in low silicon Aluminum steel |
| 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 |
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Application publication date: 20160928 |