CN107794328B - Method for controlling iron yield through converter molten iron deoxidation process - Google Patents
Method for controlling iron yield through converter molten iron deoxidation process Download PDFInfo
- Publication number
- CN107794328B CN107794328B CN201610785641.1A CN201610785641A CN107794328B CN 107794328 B CN107794328 B CN 107794328B CN 201610785641 A CN201610785641 A CN 201610785641A CN 107794328 B CN107794328 B CN 107794328B
- Authority
- CN
- China
- Prior art keywords
- tapping
- iron
- converter
- time
- molten iron
- 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.)
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000010079 rubber tapping Methods 0.000 claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000007599 discharging Methods 0.000 claims abstract description 20
- 239000011449 brick Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000004886 process control Methods 0.000 claims description 5
- 238000009628 steelmaking Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000033764 rhythmic process Effects 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction 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
-
- 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
-
- 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)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a method for preparing iron content by a converter molten iron deoxidation process, which comprises the following steps: 1) adding scrap steel into the converter, and connecting a molten steel tank to prepare tapping after the iron adding is finished; 2) determining the amount of molten iron to be added into the steel in the furnace according to the type of the steel; 3) plugging the steel outlet with a plug brick before tapping of the converter; 4) when the converter is used for tapping, after the primary furnace is abandoned to the 30-degree position, the secondary furnace is abandoned to the 60-degree position, and the secondary furnace is abandoned to the 70-degree position, and the molten iron begins to be tapped; 5) a stopwatch is used for controlling the molten iron discharging time in a timing mode when the molten iron discharging is started; determining a time coefficient according to the diameter of the steel tapping hole and the using times of the steel tapping hole, wherein the time coefficient is an empirical value; the amount of molten iron to be added, i.e. the tapping amount, is divided by the time coefficient to obtain the tapping time. The invention accurately controls the iron output by controlling the tapping angle and the tapping time of the converter, reduces the occupation time of a crane in front of the converter, improves the iron deoxidation rate and ensures the normal production rhythm.
Description
Technical field
The present invention relates to iron and steel smelting technology field, more particularly to it is a kind of by control converter angle and molten iron discharging time come
The method that control converter goes out iron.
Background technique
Converter molten steel deoxidization technology has the characteristics that deoxidation effectiveness height, high-cleanness, temperature drop are small, is a kind of ideal deoxidation side
Method, conventional implementation are as follows: converter is fallen after slag, is blended into 3~5 tons of molten iron into converter by cast house crane, is then led to
It crosses tapping hole to go out the molten iron in converter into ladle, converter reorganizes plus steel scrap, iron making.Tapping process is by steel stream
It stirs, the oxygen generation sufficiently reaction in the carbon and molten steel in molten iron removes the part oxygen in molten steel, and de- rear product generates CO gas
Discharge.
The problem of occupying cast house crane is deposited in such a way that cast house crane controls out iron, since it is desired that molten iron twice is converted,
And must be 3~5 tons of first iron making, add steel scrap, iron making again after organizing tapping, cast house crane holding time is longer；When production saves
When playing tight, the development for steel rhythm and iron deoxidation heat is directly affected.
Summary of the invention
The present invention provides a kind of methods that converter molten steel deoxidization process control goes out iron, by controlling converter tapping angle
Iron is accurately controlled out with tapping duration, reduces the holding time of cast house crane, improves the ratio of iron deoxidation, guarantees normal production
Rhythm.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of method that converter molten steel deoxidization process control goes out iron, includes the following steps:
1) converter contacts ladle after adding steel scrap, iron making, and ladle is sat on and prepares tapping on ladle car；
2) determine that this furnace steel needs the iron water amount that is blended into according to institute's steelmaking kind；
3) before converter tapping that tapping hole is stifled real with plug brick；
4) when converter tapping, first slowly put down furnace with first gear speed, to 30 ° of positions after use third speed instead and put down furnace, to 60 ° of positions
Postpone and switch to first gear speed again and slowly put down furnace, to 70 ° of positions after stop putting down furnace, open tapping hole and start molten iron discharging；
5) from converter to 70 ° of positions while molten iron discharging, the molten iron discharging time is controlled with manual time-keeping；According to tapping hole
Diameter, tapping hole access times determine that a time coefficient, the time coefficient are empirical value；The iron water amount for needing to be blended into i.e. tapping
Amount is the molten iron discharging time divided by time coefficient, and unit is the second: the occurrence of time coefficient is as shown in table 1- table 3:
Table 1
Table 2
Table 3
6) after timing time arrives, stop molten iron discharging, lift furnace with fourth speed, ladle is transported into roasting tank position and bakes tank.
Compared with prior art, the beneficial effects of the present invention are:
Iron is accurately controlled out by control converter tapping angle and tapping duration, reduces the holding time of cast house crane,
The ratio for improving iron deoxidation, guarantees normal rhythm of production.
Specific embodiment
The method that a kind of converter molten steel deoxidization process control of the present invention goes out iron, includes the following steps:
1) converter contacts ladle after adding steel scrap, iron making, and ladle is sat on and prepares tapping on ladle car；
2) determine that this furnace steel needs the iron water amount that is blended into according to institute's steelmaking kind；
3) before converter tapping that tapping hole is stifled real with plug brick；
4) when converter tapping, first slowly put down furnace with first gear speed, to 30 ° of positions after use third speed instead and put down furnace, to 60 ° of positions
Postpone and switch to first gear speed again and slowly put down furnace, to 70 ° of positions after stop putting down furnace, open tapping hole and start molten iron discharging；
5) from converter to 70 ° of positions while molten iron discharging, the molten iron discharging time is controlled with manual time-keeping；According to tapping hole
Diameter, tapping hole access times determine that a time coefficient, the time coefficient are empirical value；The iron water amount for needing to be blended into i.e. tapping
Amount is the molten iron discharging time divided by time coefficient, and unit is the second: the occurrence of time coefficient is as shown in table 1- table 3:
Table 1
Table 2
Table 3
6) after timing time arrives, stop molten iron discharging, lift furnace with fourth speed, ladle is transported into roasting tank position and bakes tank.
Following embodiment is implemented under the premise of the technical scheme of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
Not mentionleting alone bright is conventional method.
[embodiment]
1) after 260 tons of converters add steel scrap iron making, ladle is contacted, ladle is sat on and prepares tapping on ladle car；
2) tapping hole diameter 150mm, produces Q235B steel grade, and the iron water amount for needing to be blended into is 5 tons；
3) before converter starts tapping, tapping hole has been blocked up with floating plug brick.
4) when converter tapping, furnace is slowly first put down with first gear speed, is put down to 30 ° of positions, third speed is used instead and puts down furnace, stove is put down
Switch to first gear speed after to 60 ° of positions again and slowly put down furnace, stove stops putting down furnace after putting down to 70 ° of positions, opens tapping hole and start
Molten iron；
5) operative employee since converter to 70 ° of positions and molten iron discharging while manual time-keeping, tapping hole access times are
20 times, 2 time coefficients of tabling look-up are 0.5, and 5 tons of iron is divided by 0.5 out, therefore tapping duration control should be at 10 seconds；
6) after 10 seconds timing times arrive, stop molten iron discharging, furnace is lifted using fourth speed, ladle is transported into roasting tank position and is baked
Tank.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (1)
1. a kind of method that converter molten steel deoxidization process control goes out iron, which is characterized in that by control converter tapping angle and
Tapping duration accurately controls out iron, specifically comprises the following steps:
1) converter contacts ladle after adding steel scrap, iron making, and ladle is sat on and prepares tapping on ladle car；
2) determine that this furnace steel needs the iron water amount that is blended into according to institute's steelmaking kind；
3) before converter tapping that tapping hole is stifled real with plug brick；
4) when converter tapping, first slowly put down furnace with first gear speed, to 30 ° of positions after use third speed instead and put down furnace, to after 60 ° of positions
Switch to first gear speed again and slowly put down furnace, to 70 ° of positions after stop putting down furnace, open tapping hole and start molten iron discharging；
5) from converter to 70 ° of positions while molten iron discharging, the molten iron discharging time is controlled with manual time-keeping；It is straight according to tapping hole
Diameter, tapping hole access times determine that a time coefficient, the time coefficient are empirical value；The iron water amount for needing to be blended into i.e. tapping iron
Amount is the molten iron discharging time divided by time coefficient, and unit is the second: the occurrence of time coefficient is as shown in table 1- table 3:
Table 1
Table 2
Table 3
6) after timing time arrives, stop molten iron discharging, lift furnace with fourth speed, ladle is transported into roasting tank position and bakes tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610785641.1A CN107794328B (en) | 2016-08-31 | 2016-08-31 | Method for controlling iron yield through converter molten iron deoxidation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610785641.1A CN107794328B (en) | 2016-08-31 | 2016-08-31 | Method for controlling iron yield through converter molten iron deoxidation process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107794328A CN107794328A (en) | 2018-03-13 |
| CN107794328B true CN107794328B (en) | 2019-08-06 |
Family
ID=61529464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610785641.1A Active CN107794328B (en) | 2016-08-31 | 2016-08-31 | Method for controlling iron yield through converter molten iron deoxidation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107794328B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1141655A (en) * | 1993-12-15 | 1997-01-29 | 保尔·沃特公司 | Loading device for feeding electric furnace |
| CN103014222A (en) * | 2012-12-21 | 2013-04-03 | 鞍钢股份有限公司 | Method for reducing smelting cost of medium-high carbon steel |
| CN103667582A (en) * | 2013-08-19 | 2014-03-26 | 赖成章 | Method for removing oxygen contained in converter liquid steel by using total water gas |
| CN105063265A (en) * | 2015-08-31 | 2015-11-18 | 山东钢铁股份有限公司 | Method for recarburizing No.45 steel by means of low-sulfur molten iron |
-
2016
- 2016-08-31 CN CN201610785641.1A patent/CN107794328B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1141655A (en) * | 1993-12-15 | 1997-01-29 | 保尔·沃特公司 | Loading device for feeding electric furnace |
| CN103014222A (en) * | 2012-12-21 | 2013-04-03 | 鞍钢股份有限公司 | Method for reducing smelting cost of medium-high carbon steel |
| CN103667582A (en) * | 2013-08-19 | 2014-03-26 | 赖成章 | Method for removing oxygen contained in converter liquid steel by using total water gas |
| CN105063265A (en) * | 2015-08-31 | 2015-11-18 | 山东钢铁股份有限公司 | Method for recarburizing No.45 steel by means of low-sulfur molten iron |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107794328A (en) | 2018-03-13 |
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