CN107130078A - Smelting method for producing low-phosphorus high-alloy steel through alloying in converter - Google Patents
Smelting method for producing low-phosphorus high-alloy steel through alloying in converter Download PDFInfo
- Publication number
- CN107130078A CN107130078A CN201610113192.6A CN201610113192A CN107130078A CN 107130078 A CN107130078 A CN 107130078A CN 201610113192 A CN201610113192 A CN 201610113192A CN 107130078 A CN107130078 A CN 107130078A
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- CN
- China
- Prior art keywords
- steel
- converter
- smelting
- tapping
- low
- 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.)
- Granted
Links
- 238000003723 Smelting Methods 0.000 title claims abstract description 40
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 29
- 238000005275 alloying Methods 0.000 title claims abstract description 23
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 21
- 239000011574 phosphorus Substances 0.000 title abstract description 14
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 68
- 239000010959 steel Substances 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims abstract description 17
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 238000010079 rubber tapping Methods 0.000 claims description 38
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006698 induction Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 235000002908 manganese Nutrition 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000010257 thawing 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
- 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
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a smelting method for producing low-phosphorus high-alloy steel by alloying in a converter, which is a method for producing the low-phosphorus high-alloy steel by carrying out duplex smelting on a molten iron washing tank, a molten steel tank, the converter and a converter and carrying out slag removal operation on first half steel, wherein P in finished alloy steel is less than or equal to 0.020%, Cr is more than or equal to 6% or Mn is more than or equal to 6%; compared with the prior art, the invention has the beneficial effects that: a smelting method for alloying low-phosphorus steel in a converter can be used for smelting low-phosphorus high-alloy steel under the production condition of the converter, so that the low-phosphorus high-alloy steel can be produced on the premise of alloying at the smelting end point of the converter. The method can ensure that certain steel mills can produce low-phosphorus high-alloy steel under the existing conditions without introducing induction furnace equipment, thereby increasing the product types and simultaneously not increasing the investment cost.
Description
Technical field
The present invention relates to steelmaking technical field, alloying produces the smelting side of low-phosphorous high-alloy steel in especially a kind of Converter
Method.
Background technology
Rephosphorization phenomenon is phosphorus from slag and returned in steel, or phosphorus content is higher than the phenomenon of end phosphorus content in steel.From de-
From the point of view of phosphorus reaction, every condition for being conducive to backward reaction can all cause the rephosphorization of steel.Basicity or iron oxide such as slag contain
Amount reduction, or the bad slag of lime scorification is glutinous, furnace temperature is excessively high, can cause rephosphorization phenomenon；In addition, deoxygenation in tapping
Gold adds improper or tapping slag, and phosphorus content is higher in alloy, and the P content also resulted in finished steel contains higher than terminal P
Amount；
Low-phosphorous high-alloy steel is general all to be produced in Special Steel Works, in common steel mill, because manganese, chromium equal size are typically all higher than 6%,
Need to carry out alloying in converter smelting endpoint, while in order to ensure the thawing of alloy, it is necessary to add a number of aluminum shot,
This aspect causes the basicity and oxidisability of converter terminal slag extremely to reduce, simultaneously because Al, Mn and O reaction moment put
Go out substantial amounts of heat so that liquid steel temperature is drastically raised, along with the P brought into addition Mn alloys, ultimately result in substantial amounts of
P content in rephosphorization, steel is far above the P content of finished product requirement.It is domestic to have many on Low-phosphorus Steel, ultra-low phosphoretic steel at present
Converter smelting method, but the production method of the low-phosphorous high-alloy steel for carrying out alloying in converter smelting endpoint is not reported
Road.Therefore a kind of method that alloying produces low-phosphorous high-alloy steel in Converter is invented, to being needed due to no induction furnace
The steel mill that alloying is carried out in Converter has great importance.
The content of the invention
, can be in converter it is an object of the invention to provide the smelting process that alloying in a kind of Converter produces low-phosphorous high-alloy steel
Low-phosphorous high-alloy steel is smelted under working condition so that such low-phosphorous high alloy steel grade can carry out alloying in converter smelting endpoint
On the premise of produce.
To achieve the above object, the present invention is realized using following technical scheme：
Alloying produces the smelting process of low-phosphorous high-alloy steel in a kind of Converter, be by washed metal water pot, ladle, converter,
Converter duplex is smelted, the method that preceding half steel skims operation to produce low-phosphorous high-alloy steel, P≤0.020% in final alloy steel,
Cr >=6% or Mn >=6%；Specific method step is as follows：
1) carry out cleaning of evaporator operation to the hot-metal bottle for half steel molten steel before containing, washed hot-metal bottle require tank bottom, tank skin,
Tank is along without accumulated slag；
2) to carrying out cleaning of evaporator operation for containing the ladle of steel alloy molten steel, ladle last time is low P steel grades using steel grade,
Ladle after cleaning is without residue；
3) half steel smelting molten steel before converter is carried out, 1400~1450 DEG C of tapping temperature is controlled, carbon >=1.5% of tapping, tapping
P≤0.010%；
4) half steel tapping adds granule 6~8kg/t of lime before, and slag-stopping tapping, molten steel is poured into the hot-metal bottle cleaned, gone out
Steel terminates progress and takes off slag operation；
5) prepurging is carried out to the converter for half steel after smelting：Continuous prepurging >=3 time, do not allow to splash slag during prepurging, wash
Stove heat tapping temperature T >=1710 DEG C, C≤0.04%, P≤0.012%；
6) semisteel smelting after being carried out in the converter cleaned, 1620~1640 DEG C of the furnace temperature of control smelting endpoint, falls
Stove P≤0.005%；
7) after rear semisteel smelting terminal reaches requirement, require that adding alloy carries out alloy according to steel grades in Converter
Change, alloying carries out tapping steel after finishing, molten steel is gone out into the ladle cleaned,.
Compared with prior art, the beneficial effects of the invention are as follows：
Alloying produces the smelting process of low-phosphorous high-alloy steel in a kind of Converter, can in the low-phosphorous high-alloy steel of converter smelting,
Such low-phosphorous high alloy steel grade is produced on the premise of converter smelting endpoint carries out alloying.It can make some
Steel mill can produce low-phosphorous high-alloy steel under existence conditions, without introducing sensing furnace apparatus again, so that in increase product kind
Cost of investment need not be increased while class.
Embodiment
Embodiments of the present invention are further illustrated with reference to specific embodiment：
In a kind of Converter alloying produce Low-phosphorus Steel high alloy smelting process, be by washed metal water pot, ladle, converter,
Converter duplex is smelted, the method that preceding half steel skims operation to produce low-phosphorous high-alloy steel, P≤0.020% in final alloy steel,
Cr >=6% or Mn >=6%；Specific method step is as follows：
1) carry out cleaning of evaporator operation to the hot-metal bottle for half steel molten steel before containing, washed hot-metal bottle require tank bottom, tank skin,
Without accumulated slag；The requirement of washed metal water pot：It is 1500-1550 DEG C to control tapping temperature.
2) to carrying out cleaning of evaporator operation for the ladle for containing steel alloy molten steel, ladle requirement is washed：Ladle last time uses steel
It is low P steel grades to plant；Ladle after cleaning is without residue；.
3) half steel smelting molten steel before converter is carried out, 1400~1450 DEG C of tapping temperature is controlled, carbon >=1.5% of tapping, tapping
P≤0.010%；
4) half steel tapping adds granule 6~8kg/t of lime before, and slag-stopping tapping, molten steel is poured into the hot-metal bottle cleaned, gone out
Steel terminates progress and takes off slag operation；
5) prepurging is carried out to the converter for half steel after smelting：Continuous prepurging >=3 time, do not allow to splash slag during prepurging, wash
Stove heat tapping temperature T >=1710 DEG C, C≤0.04%, P≤0.012%；The prepurging process of converter is smelted with converter continuous several times
Process is identical.
6) semisteel smelting after being carried out in the converter cleaned, 1620~1640 DEG C of the furnace temperature of control smelting endpoint, falls
Stove P≤0.005%；
7) after rear semisteel smelting terminal reaches requirement, require that adding alloy carries out alloy according to steel grades in Converter
Change, alloying carries out tapping steel after finishing, molten steel is gone out into the ladle cleaned.
Embodiment 1：
For Mn contents 17%~18%, P≤0.02% steel grade；
Smelting operation process is：
1) cleaning of evaporator operation first is carried out to hot-metal bottle and ladle；
2) semisteel smelting before converter, 1415 DEG C of tapping temperature, carbon 1.59% of tapping, tap P 0.009%；
3) half steel tapping process adds granule lime 700kg before, and slag-stopping tapping is poured into the hot-metal bottle cleaned, tapping knot
Shu Jinhang takes off slag operation；
4) prepurging operation is carried out to converter：Continuously prepurging 3 times, 1710 DEG C of prepurging heat tapping temperature, C 0.04%, P 0.005%；
5) semisteel smelting afterwards, 1636 DEG C of furnace temperature, the P of falling stove 0.005%；
6) alloying is operated in stove, adds the spherical electrolytic manganeses of 23t, and 2.5t aluminum shots, lower oxygen rifle point blows 50s, tapping temperature
1652 DEG C, tap P 0.015%, and tap C 0.036%, and tap Mn 17.3%；Molten steel after alloying pours into the steel cleaned
In water pot.
Embodiment 2：
For Cr contents 6~18%, P≤0.02% steel grade；
Smelting operation process is：
1) cleaning of evaporator operation first is carried out to hot-metal bottle and ladle；
2) semisteel smelting before converter, 1440 DEG C of tapping temperature, carbon 1.87% of tapping, tap P 0.010%；
3) half steel tapping process adds granule lime 800kg before, and slag-stopping tapping is poured into the hot-metal bottle cleaned, tapping knot
Shu Jinhang takes off slag operation；
4) prepurging operation is carried out to converter：Continuously prepurging 3 times, 1750 DEG C of prepurging heat tapping temperature, C 0.03%, P 0.006%；
5) semisteel smelting afterwards, 1622 DEG C of furnace temperature, the P of falling stove 0.004%；
6) alloying is operated in stove, adds 9t low-carbon ferrochromiums, and 1.2t aluminum shots, lower oxygen rifle point blows 50s, tapping temperature 1646
DEG C, tap P 0.013%, and tap C 0.039%, and tap Cr 8.8%.
Claims (1)
1. alloying produces the smelting process of low-phosphorous high-alloy steel in a kind of Converter, it is characterised in that be by washed metal water
Tank, ladle, converter, converter duplex are smelted, and the method that preceding half steel skims operation to produce low-phosphorous high-alloy steel, finished product is closed
P≤0.020%, Cr >=6% or Mn >=6% in Jin Gang；Specific method step is as follows：
1) carry out cleaning of evaporator operation to the hot-metal bottle for half steel molten steel before containing, washed hot-metal bottle require tank bottom, tank skin,
Tank is along without accumulated slag；
2) to carrying out cleaning of evaporator operation for containing the ladle of steel alloy molten steel, ladle last time is low P steel grades using steel grade,
Ladle after cleaning is without residue；
3) half steel smelting molten steel before converter is carried out, 1400~1450 DEG C of tapping temperature is controlled, carbon >=1.5% of tapping, tapping
P≤0.010%；
4) half steel tapping adds granule 6~8kg/t of lime before, and slag-stopping tapping, molten steel is poured into the hot-metal bottle cleaned, gone out
Steel terminates progress and takes off slag operation；
5) prepurging is carried out to the converter for half steel after smelting：Continuous prepurging >=3 time, do not allow to splash slag during prepurging, wash
Stove heat tapping temperature T >=1710 DEG C, C≤0.04%, P≤0.012%；
6) semisteel smelting after being carried out in the converter cleaned, 1620~1640 DEG C of the furnace temperature of control smelting endpoint, falls
Stove P≤0.005%；
7) after rear semisteel smelting terminal reaches requirement, require that adding alloy carries out alloy according to steel grades in Converter
Change, alloying carries out tapping steel after finishing, molten steel is gone out into the ladle cleaned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610113192.6A CN107130078B (en) | 2016-02-29 | 2016-02-29 | Smelting method for producing low-phosphorus high-alloy steel through alloying in converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610113192.6A CN107130078B (en) | 2016-02-29 | 2016-02-29 | Smelting method for producing low-phosphorus high-alloy steel through alloying in converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107130078A true CN107130078A (en) | 2017-09-05 |
| CN107130078B CN107130078B (en) | 2019-03-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610113192.6A Active CN107130078B (en) | 2016-02-29 | 2016-02-29 | Smelting method for producing low-phosphorus high-alloy steel through alloying in converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107130078B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438285A (en) * | 2019-08-29 | 2019-11-12 | 建龙阿城钢铁有限公司 | A kind of viscous tank treatment process of converter smelting half steel hot-metal bottle |
| CN114959163A (en) * | 2022-06-30 | 2022-08-30 | 中国铁建股份有限公司 | Alloying smelting method in converter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255258A (en) * | 2013-06-11 | 2013-08-21 | 鞍钢股份有限公司 | Converter smelting method of low-phosphorus high-alloy steel |
-
2016
- 2016-02-29 CN CN201610113192.6A patent/CN107130078B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255258A (en) * | 2013-06-11 | 2013-08-21 | 鞍钢股份有限公司 | Converter smelting method of low-phosphorus high-alloy steel |
Non-Patent Citations (2)
| Title |
|---|
| 刘文飞等: "超低温 LNG 储罐用钢的炼钢生产实践", 《鞍钢技术》 * |
| 吕铭等: "双联炼钢法的研究与实践", 《炼钢》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438285A (en) * | 2019-08-29 | 2019-11-12 | 建龙阿城钢铁有限公司 | A kind of viscous tank treatment process of converter smelting half steel hot-metal bottle |
| CN114959163A (en) * | 2022-06-30 | 2022-08-30 | 中国铁建股份有限公司 | Alloying smelting method in converter |
| CN114959163B (en) * | 2022-06-30 | 2023-10-17 | 中国铁建股份有限公司 | Alloying smelting method in converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107130078B (en) | 2019-03-22 |
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