CN107012293A - Method for improving LF furnace temperature rise efficiency and reducing solvent consumption - Google Patents
Method for improving LF furnace temperature rise efficiency and reducing solvent consumption Download PDFInfo
- Publication number
- CN107012293A CN107012293A CN201610059312.9A CN201610059312A CN107012293A CN 107012293 A CN107012293 A CN 107012293A CN 201610059312 A CN201610059312 A CN 201610059312A CN 107012293 A CN107012293 A CN 107012293A
- Authority
- CN
- China
- Prior art keywords
- slag
- ladle
- lime
- molten steel
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000002904 solvent Substances 0.000 title claims abstract description 10
- 239000002893 slag Substances 0.000 claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 20
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 20
- 239000004571 lime Substances 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 9
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 9
- 238000010079 rubber tapping Methods 0.000 claims abstract description 9
- 238000011282 treatment Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000007670 refining Methods 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000005275 alloying Methods 0.000 claims description 2
- 238000009847 ladle furnace Methods 0.000 abstract 5
- 238000003723 Smelting Methods 0.000 description 2
- 229910014813 CaC2 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- 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
- C21C7/06—Deoxidising, e.g. killing
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a method for improving the heating efficiency of an LF (ladle furnace) and reducing solvent consumption, wherein molten steel discharged from the converter is loaded into a molten steel tank B ready for tapping from the converter, and after the molten steel tank A refined by the LF is cast on a machine, residual steel slag is immediately turned into the molten steel tank B; when the molten steel tank B enters an LF furnace for treatment, adding lime slag-making materials in 2-4 batches, wherein the adding amount of each batch is 480-650 kg; adding a first batch of lime, and simultaneously adding an aluminum wire section and fluxing slag, wherein the adding amount of the fluxing slag is 0.15-0.25% of the lime; the adding amount of the slag is reduced by 200-800 kg compared with the tank times without recovering steel slag, and the adding amount of the fluxing slag is reduced by 100-375 kg compared with the tank times without recovering steel slag; when the steel in the molten steel tank B has alloy residual elements, if the molten steel tank A contains the alloy components, the alloy components are not recycled; when the ladle B has been recovered for more than 2 times, it is not recovered. The invention can greatly improve the heating efficiency of the LF furnace, effectively reduce the consumption of energy, alloy and solvent and reduce the cost of steel per ton.
Description
Technical field
The invention belongs to process for making technical field, and in particular to one kind can improve LF stoves heating efficiency, reduce
The method of solvent consumption.
Background technology
LF stoves heating power consumption is one of main power consumption items of smeltery.At present, the main technique of power consumption is reduced
Measure mainly has：1st, converter cold melt ratio is controlled, prevents from effectively being buried because of top slag crust
Arc is heated；2nd, entered the station molten steel tank deck slag situation according to LF stoves, determine heating gear；3rd, added before heating
CaC2Making foamed slag etc., these measures have served suitable to reduction power consumption.The purpose of above-mentioned technique is sought to
The time required to shortening slagging process as much as possible, so that LF stoves can carry out submerged arc heating.Can by above measure
Slag making is set to foreshorten to 15min or so.But how further to shorten the slag making time, carry out submerged arc heating, most
Reduce power consumption to limits, it is clear that it is impossible to rely solely on above-mentioned measure.
The content of the invention
The purpose of the present invention is intended to improve LF stoves heating efficiency, reduces the energy, alloy and solvent consumption, reduction
Smelting cost.
Therefore, the technical solution that the present invention is taken is：
A kind of method that raising LF stoves heating efficiency reduces solvent consumption, it is characterised in that：
(1) two kinds of ladles are defined, after one kind is LF stove refining treatments, the ladle A cast in casting machine；
Another is to prepare the ladle B in converter tapping, is planned into LF stove refining treatments；
(2) during converter tapping, molten steel is loaded into ladle B, it is ensured that headroom is in 500~550mm；
(3) after machine has been cast on ladle A, remaining slag is translated into ladle B immediately；
(4) when ladle B enters the processing of LF stoves, after 4~4.5 DEG C/min 4~5min of speed heating,
2~4 batches are divided to add lime slag material, every batch of lime addition is in 480~650kg；
Plus aluminum steel section is added while first lime, addition is：(finished product reach the standard grade aluminium content+0.01%)
×10000×30；
Fluxing slag is added while adding lime together, fluxing slag addition is the 0.15%~0.25% of lime；
The tank time that the total amount that slag charge adds less reclaims slag reduces by 200~800kg, and fluxing slag adds total amount less
The tank time for reclaiming slag reduces by 100~375kg；
(5) condition that slag is reclaimed in ladle A is：When steel grade has alloy residual elements will in ladle B
Ask, if containing the alloying component in ladle A, do not reclaim；When ladle B reclaimed 2 times with
When upper, then recovery or only recovery section slag were not continued to.
Beneficial effects of the present invention are：
LF stoves heating efficiency can be greatly improved in the present invention, effectively reduce the energy, alloy and solvent consumption, reduction
Smelting cost.By taking typical steel grade AH32 as an example, the present invention is with common process contrast statistical result：
| Comparative example | Embodiment | |
| Heating-up time, min/ tanks | 22 | 17 |
| Lime addition, kg/ tanks | 1719 | 1305 |
| Fluxing slag addition, kg/ tanks | 446 | 200 |
The present invention does not include the benefit for reclaiming residual steel, only reduces the energy, alloy, the ton steel benefit of solvent consumption
I.e. up to 2.59 yuan.
Embodiment
Embodiment 1：
1st, two kinds of ladles are defined, after one kind is LF stove refining treatments, the ladle A cast in casting machine, separately
A kind of is to prepare the ladle B in converter tapping, is planned into LF stove refining treatments.
2nd, during converter tapping, molten steel is loaded into ladle B, it is ensured that headroom is in 530mm.
3rd, after machine has been cast on ladle A, remaining slag is translated into ladle B immediately, to reduce slag
Dissipated heat, while avoiding slag temperature low, turns over unnet when turning over slag.
4th, when ladle B enters the processing of LF stoves, because top slag is thicker and good fluidity, thus the 4th grade of selection
Heating, after 4 DEG C/min speed heating 5min, point 2 addition lime slag materials.
Plus aluminum steel section is added while first lime, finished product reaches the standard grade aluminium content for 0.045%, and aluminum steel section is added
Measure as (0.045%+0.01%) × 10000 × 30=165kg.
Fluxing slag, the total addition 209kg of fluxing slag are added together while adding lime.
The tank time that the total amount that slag charge adds less reclaims slag reduces 774kg, and fluxing slag adds total amount and less reclaims steel
The tank time of slag reduces 208kg.
Embodiment 2：
1st, two kinds of ladles are defined, after one kind is LF stove refining treatments, the ladle A cast in casting machine, separately
A kind of is to prepare the ladle B in converter tapping, is planned into LF stove refining treatments.
2nd, during converter tapping, molten steel is loaded into ladle B, it is ensured that headroom is in 540mm.
3rd, after machine has been cast on ladle A, remaining slag is translated into ladle B immediately, to reduce slag
Dissipated heat, while avoiding slag temperature low, turns over unnet when turning over slag.
4th, ladle B enters after LF stoves, because top slag is thicker and good fluidity, thus the 4th grade of heating of selection,
After 4.5 DEG C/min speed heating 4min, point 2 addition lime slag materials.
Aluminum steel section is added while first lime is added, finished product reaches the standard grade aluminium content for 0.045%, aluminum steel section plus
Enter amount for (0.045%+0.01%) × 10000 × 30=165kg.
Fluxing slag, the total addition 190kg of fluxing slag are added together while lime is added.
The tank time that the total amount that slag charge adds less reclaims slag reduces 546kg, and fluxing slag adds total amount and less reclaims steel
The tank time of slag reduces 285kg.
Claims (1)
1. a kind of method that raising LF stoves heating efficiency reduces solvent consumption, it is characterised in that：
(1) two kinds of ladles are defined, after one kind is LF stove refining treatments, the ladle A cast in casting machine；
Another is to prepare the ladle B in converter tapping, is planned into LF stove refining treatments；
(2) during converter tapping, molten steel is loaded into ladle B, it is ensured that headroom is in 500~550mm；
(3) after machine has been cast on ladle A, remaining slag is translated into ladle B immediately；
(4) when ladle B enters the processing of LF stoves, after 4~4.5 DEG C/min 4~5min of speed heating,
2~4 batches are divided to add lime slag material, every batch of lime addition is in 480~650kg；
Plus aluminum steel section is added while first lime, addition is：(finished product reach the standard grade aluminium content+0.01%)
×10000×30；
Fluxing slag is added while adding lime together, fluxing slag addition is the 0.15%~0.25% of lime；
The tank time that the total amount that slag charge adds less reclaims slag reduces by 200~800kg, and fluxing slag adds total amount less
The tank time for reclaiming slag reduces by 100~375kg；
(5) condition that slag is reclaimed in ladle A is：When steel grade has alloy residual elements will in ladle B
Ask, if containing the alloying component in ladle A, do not reclaim；When ladle B reclaimed 2 times with
When upper, then recovery or only recovery section slag were not continued to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610059312.9A CN107012293A (en) | 2016-01-27 | 2016-01-27 | Method for improving LF furnace temperature rise efficiency and reducing solvent consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610059312.9A CN107012293A (en) | 2016-01-27 | 2016-01-27 | Method for improving LF furnace temperature rise efficiency and reducing solvent consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107012293A true CN107012293A (en) | 2017-08-04 |
Family
ID=59438680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610059312.9A Pending CN107012293A (en) | 2016-01-27 | 2016-01-27 | Method for improving LF furnace temperature rise efficiency and reducing solvent consumption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107012293A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813225A (en) * | 2020-12-28 | 2021-05-18 | 芜湖新兴铸管有限责任公司 | Control method for reducing power consumption in refining of ordinary steel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051441A (en) * | 2011-01-21 | 2011-05-11 | 储鸿文 | Quick refining process for LF (ladle furnace) |
| CN103255264A (en) * | 2013-06-07 | 2013-08-21 | 鞍钢股份有限公司 | Method for dephosphorizing by using LF refining furnace |
| CN103276148A (en) * | 2013-06-07 | 2013-09-04 | 鞍钢股份有限公司 | Method for reducing influence of casting residue recovery on LF molten steel recarburization |
| CN103333980A (en) * | 2013-07-12 | 2013-10-02 | 鞍钢股份有限公司 | Method for recycling casting residues |
| CN103710484A (en) * | 2014-01-06 | 2014-04-09 | 鞍钢股份有限公司 | Silicon recovery method for controlling casting residues to be recovered into low-silicon steel |
-
2016
- 2016-01-27 CN CN201610059312.9A patent/CN107012293A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051441A (en) * | 2011-01-21 | 2011-05-11 | 储鸿文 | Quick refining process for LF (ladle furnace) |
| CN103255264A (en) * | 2013-06-07 | 2013-08-21 | 鞍钢股份有限公司 | Method for dephosphorizing by using LF refining furnace |
| CN103276148A (en) * | 2013-06-07 | 2013-09-04 | 鞍钢股份有限公司 | Method for reducing influence of casting residue recovery on LF molten steel recarburization |
| CN103333980A (en) * | 2013-07-12 | 2013-10-02 | 鞍钢股份有限公司 | Method for recycling casting residues |
| CN103710484A (en) * | 2014-01-06 | 2014-04-09 | 鞍钢股份有限公司 | Silicon recovery method for controlling casting residues to be recovered into low-silicon steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813225A (en) * | 2020-12-28 | 2021-05-18 | 芜湖新兴铸管有限责任公司 | Control method for reducing power consumption in refining of ordinary steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102212749B (en) | Method for producing steel for high-efficiency alloy welding wires through continuous billet casting | |
| CN109913607B (en) | Smelting method of ultra-low carbon steel | |
| CN105886787B (en) | A kind of method that vanadium is reclaimed from corundum slag containing vanadium | |
| CN106811567B (en) | Method for producing low manganese steel | |
| CN105154623A (en) | Efficient alloying method for smelting 38CrMoAl steel | |
| CN114032354A (en) | Smelting process for improving low-temperature impact energy of 32CrNi3MoVE steel | |
| CN116043068B (en) | GH4169 high-temperature alloy and smelting process thereof | |
| CN105132616B (en) | Method for preventing surface of flange steel from cracking | |
| CN103205536A (en) | Semi-steel dephosphorizing agent and semi-steel dephosphorizing method | |
| CN103276148A (en) | Method for reducing influence of casting residue recovery on LF molten steel recarburization | |
| CN105648301A (en) | 42CrMo melting process | |
| CN109825674A (en) | Conducive to the RH heating by O2 blowing method of IF steel Cleanliness of Molten Steel control | |
| CN104531953A (en) | Refining argon blowing method applied to SPHC steel grade | |
| CN107012293A (en) | Method for improving LF furnace temperature rise efficiency and reducing solvent consumption | |
| CN113913580B (en) | Production method of ultralow-carbon low-aluminum structural molten steel | |
| CN105087853B (en) | The method of converter semi-steel making slag making | |
| CN103468868A (en) | Method for improving cleanliness of low-phosphorus interstitial-free steel | |
| CN103667875B (en) | Preparation method of low-carbon acid-resistant pipeline steel | |
| CN110106432A (en) | A kind of preparation method of high nitrogen steel | |
| CN101487098A (en) | Tube blank for N80 steel pipe and method of manufacturing the same | |
| CN105238907B (en) | Method for refining molten steel in vacuum | |
| CN106834610A (en) | A kind of high-strength micro alloyed steel multistage combination control nitrogen method | |
| CN113604727A (en) | Smelting method for improving yield of scrap steel metal based on BOF-CC process | |
| CN110218839B (en) | Deep desulfurization method in bearing steel smelting process | |
| CN108796164B (en) | Smelting method of No. 45 steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170804 |
|
| WD01 | Invention patent application deemed withdrawn after publication |