CN109423537A - Method for quickly removing cold steel in RH vacuum chamber - Google Patents
Method for quickly removing cold steel in RH vacuum chamber Download PDFInfo
- Publication number
- CN109423537A CN109423537A CN201710742651.1A CN201710742651A CN109423537A CN 109423537 A CN109423537 A CN 109423537A CN 201710742651 A CN201710742651 A CN 201710742651A CN 109423537 A CN109423537 A CN 109423537A
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- CN
- China
- Prior art keywords
- oxygen
- vacuum chamber
- flow
- oxygen blast
- steel
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000001301 oxygen Substances 0.000 claims abstract description 92
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 92
- 239000002893 slag Substances 0.000 claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 9
- 238000007654 immersion Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000003780 insertion Methods 0.000 claims description 13
- 230000037431 insertion Effects 0.000 claims description 13
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 12
- 240000005373 Panax quinquefolius Species 0.000 claims description 12
- 238000010926 purge Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 abstract 7
- 238000002844 melting Methods 0.000 abstract 2
- 230000008018 melting Effects 0.000 abstract 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000004860 Blast Crisis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C21C7/10—Handling in a vacuum
-
- 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 relates to a method for rapidly removing cold steel in an RH vacuum chamber, which changes an energy medium for off-line baking of the RH vacuum chamber into oxygen, and starts to bake off-line within 30 minutes after the last furnace of molten steel is finished in the working period of the RH vacuum chamber; carrying out immersion resetting operation on a slag-containing molten steel tank for receiving the melting residue of the vacuum chamber according to a jacking mode during molten steel treatment, and setting the total oxygen blowing amount, the ignition oxygen blowing flow and the oxygen blowing gun position of an RH top gun; starting oxygen blowing operation, and adjusting oxygen blowing flow when the oxygen lance reaches a set position and the flow reaches a set value; after liquid slag flows out of the insert pipe, adjusting the position of the RH oxygen lance for 2-5 times during oxygen blowing, and blowing oxygen for 5-20min each time; and after the slagging operation is finished, starting RH top lance nitrogen protection gas to sweep the vacuum chamber to reduce the oxygen concentration in the vacuum chamber. The invention realizes rapid baking and melting of cold steel. The RH top lance has the function of oxygen baking during the period of non-treatment of molten steel. The off-line baking process of the vacuum chamber is changed, so that the baking time is shortened by 1.5 h.
Description
Technical field
The present invention relates to a kind of methods of quickly removal cold steel of RH vacuum chamber.
Background technique
RH is a kind of multi-functional molten steel secondary refining process equipment for having decarburization, degassing, adjustment temperature and ingredient.Entirely
Molten steel metallurgical reaction is carried out in the vacuum chamber that block has refractory lining.Vacuum chamber is by hot top cover, intermediate channel, base channel and insertion
Pipe composition.Before steel treatment, first insertion tube is immersed in ladle molten steel to be processed.When vacuum chamber, molten steel surface
Atmospheric pressure force molten steel from insertion tube flow into vacuum chamber in, under the action of lift gas, realize vacuum chamber in molten steel follow
Ring.In the vacuum chamber work phase, molten steel constantly recycles and occurs metallurgical reaction, and steel slag splash is in vacuum chamber interior walls, in intermediate channel
Cold steel not easily to fall off is formed with base channel.After vacuum chamber is offline, needs to split intermediate channel and base channel, safeguard vacuum again
Room.If cold steel does not remove, when fractionation, will cause the resistance to material damage of intermediate channel and base channel, influence the vacuum chamber resistance to material service life.
The method for removing cold steel at present is to lead to gas of high flow rate before vacuum chamber is offline using RH top gun and oxygen baking 2h is molten
Smelting cold steel, gas flow reach 800m3The proportion of/h, coal gas and oxygen is 1:1.15.This removing method must toast online,
It is too long to occupy the RH production time, while energy consumption is big.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of methods of quickly removal cold steel of vacuum chamber, and quickly removal is true
The cold steel of empty room reduces the offline holding time of vacuum chamber, reduces energy consumption.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of method of the quick cold steel of removal RH vacuum chamber, the specific steps are as follows:
1) start to toast within 30 minutes after last furnace steel treatment in the RH vacuum chamber work phase offline；
2) oxygen concentration test equipment is opened；
3) the Sheng slag ladle for accepting RH vacuum chamber fusing residue is soaked according to the jack-up method during processing molten steel
It is deep to reset operation, it jacks Sheng slag ladle to the insertion tube of RH vacuum chamber, guarantees that immersion depth is greater than 400mm；
4) RH top gun oxygen blast total amount is set as 200-500m3, light a fire oxygen blast flow 100-1000m3/ h, oxygen blast rifle position 2000-
6000mm；
5) start oxygen blast operation, oxygen blast flow is 200-450m3/ h, oxygen rifle start downlink, when oxygen rifle reaches setting position, stream
Amount reaches setting value, adjustment oxygen blast flow to 500-2000m3/h；
6) after having liquid slag to flow out insertion tube, RH oxygen rifle position is adjusted, each adjusting range is 100-500mm, oxygen blast phase
Between adjust 2-5 times, each oxygen blast 5-20min；
7) RH oxygen rifle automatic lifting completes this slagging operation to standby position after reaching oxygen blast total amount；
8) RH top gun nitrogen protection gas, nitrogen flow 100-200m are opened3/ h, purge time 5-20min are reduced true
Oxygen concentration in empty room.
Empty ladle in step 3 using arrival service life is as the Sheng slag ladle for accepting vacuum chamber fusing residue.
Compared with prior art, the beneficial effects of the present invention are:
The energy medium of the offline baking of RH vacuum chamber is changed to oxygen by the present invention, is improved oxygen flow, is accurately controlled oxygen rifle
Quick baking is realized in position, melts smelting cold steel.The function of being toasted during making RH top gun have non-process molten steel using oxygen.Pass through
Change the offline baking process of vacuum chamber, energy saving 1800 yuan/time shortens baking time 1.5h, improves the production efficiency of RH furnace.
Specific embodiment
Below with reference to embodiment, the present invention is further described:
The present invention will be described in detail for following embodiment.These embodiments be only to preferred embodiment of the invention into
Row description, does not limit the scope of the present invention.
Embodiment 1
A kind of method of the quick cold steel of removal RH vacuum chamber, the specific steps are as follows:
Last furnace steel treatment terminates in the 1.RH vacuum chamber work phase, starts to toast after ten minutes offline；
2. opening oxygen concentration test equipment, personnel are forbidden to enter in turntable fence area interior.Heat top bell, processing position vacuum
Trolley forbids personnel to stop, and each layer platform forbids fire operation；
3. being soaked according to the jack-up method during processing molten steel to the Sheng slag ladle for accepting RH vacuum chamber fusing residue
It is deep to reset operation, it jacks Sheng slag ladle to the insertion tube of RH vacuum chamber, guarantees that immersion depth is greater than 400mm；Contain slag
Ladle is used using the empty ladle for reaching service life.
4. setting RH top gun oxygen blast total amount as 300m3, light a fire oxygen blast flow 200m3/ h, oxygen blast rifle position 4000mm；
5. starting oxygen blast operation, oxygen blast flow is 200m3/ h, oxygen rifle start downlink, and when oxygen rifle reaches setting position, flow reaches
To setting value, oxygen blast flow is adjusted to 1400m3/h；
6. after thering is liquid slag to flow out insertion tube, RH oxygen rifle position is adjusted, increases 500mm every time, is adjusted 3 times during oxygen blast,
Each oxygen blast 5min；
7. reaching RH oxygen rifle automatic lifting after oxygen blast total amount completes this slagging operation to standby position；
8. opening RH top gun nitrogen protection gas, nitrogen flow 150m3/ h, purge time 10min are reduced in vacuum chamber
Oxygen concentration.
Embodiment 2
A kind of method of the quick cold steel of removal RH vacuum chamber, the specific steps are as follows:
Last furnace steel treatment terminates to start to toast after twenty minutes offline in the 1.RH vacuum chamber work phase；
2. opening oxygen concentration test equipment, personnel are forbidden to enter in turntable fence area interior.Heat top bell, processing position vacuum
Trolley forbids personnel to stop, and each layer platform forbids fire operation；
3. carrying out depth of immersion to the Sheng slag ladle for accepting vacuum chamber fusing residue according to the jack-up method during processing molten steel
Operation is resetted, jacks Sheng slag ladle to the insertion tube of RH vacuum chamber, guarantees that immersion depth is greater than 400mm；Contain slag steel
Water pot is using the empty ladle for reaching service life.
4. setting RH top gun oxygen blast total amount as 280m3, light a fire oxygen blast flow 400m3/ h, oxygen blast rifle position 3000mm；
5. starting oxygen blast operation, oxygen blast flow is 240m3/ h, oxygen rifle start downlink, and when oxygen rifle reaches setting position, flow reaches
To setting value, oxygen blast flow is adjusted to 1000m3/h；
6. after thering is liquid slag to flow out insertion tube, RH oxygen rifle position is adjusted, increases 400mm every time, is adjusted 3 times during oxygen blast,
Each oxygen blast 6min；
7. reaching RH oxygen rifle automatic lifting after oxygen blast total amount completes this slagging operation to standby position；
8. opening RH top gun nitrogen protection gas, nitrogen flow 100m3/ h, purge time 20min are reduced in vacuum chamber
Oxygen concentration.
Embodiment 3
A kind of method of the quick cold steel of removal RH vacuum chamber, the specific steps are as follows:
Last furnace steel treatment starts to toast offline after terminating 15 minutes in the 1.RH vacuum chamber work phase；
2. opening oxygen concentration test equipment, personnel are forbidden to enter in turntable fence area interior.Heat top bell, processing position vacuum
Trolley forbids personnel to stop, and each layer platform forbids fire operation；
3. being soaked according to the jack-up method during processing molten steel to the Sheng slag ladle for accepting RH vacuum chamber fusing residue
It is deep to reset operation, it jacks Sheng slag ladle to the insertion tube of RH vacuum chamber, guarantees that immersion depth is greater than 400mm；Contain slag
Ladle is using the empty ladle for reaching service life.
4. setting RH top gun oxygen blast total amount as 400m3, light a fire oxygen blast flow 600m3/ h, oxygen blast rifle position 2000mm；
5. starting oxygen blast operation, oxygen blast flow is 300m3/ h, oxygen rifle start downlink, and when oxygen rifle reaches setting position, flow reaches
To setting value, oxygen blast flow is adjusted to 1200m3/h；
6. after thering is liquid slag to flow out insertion tube, RH oxygen rifle position is adjusted, increases 300mm every time, is adjusted 4 times during oxygen blast,
Each oxygen blast 5min；
7. reaching RH oxygen rifle automatic lifting after oxygen blast total amount completes this slagging operation to standby position；
8. opening RH top gun nitrogen protection gas, nitrogen flow 130m3/ h, purge time 15min are reduced in vacuum chamber
Oxygen concentration.
Claims (2)
1. a kind of method of the quickly removal cold steel of RH vacuum chamber, which is characterized in that specific step is as follows:
1) start to toast within 30 minutes after last furnace steel treatment in the RH vacuum chamber work phase offline；
2) depth of immersion is carried out to the Sheng slag ladle for accepting RH vacuum chamber fusing residue according to the jack-up method during processing molten steel to answer
Bit manipulation jacks Sheng slag ladle to the insertion tube of RH vacuum chamber, guarantees that immersion depth is greater than 400mm；
3) RH top gun oxygen blast total amount is set as 200-500m3, light a fire oxygen blast flow 100-1000m3/ h, oxygen blast rifle position 2000-
6000mm；
4) start oxygen blast operation, oxygen blast flow is 200-450m3/ h, oxygen rifle start downlink, and when oxygen rifle reaches setting position, flow reaches
To setting value, oxygen blast flow is adjusted to 500-2000m3/h；
5) after having liquid slag to flow out insertion tube, RH oxygen rifle position is adjusted, each adjusting range is 100-500mm, each oxygen blast 5-
20min is adjusted 2-5 times during oxygen blast；
6) RH oxygen rifle automatic lifting completes this slagging operation to standby position after reaching oxygen blast total amount；
7) RH top gun nitrogen protection gas, nitrogen flow 100-200m are opened3/ h, purge time 5-20min reduce vacuum chamber
Interior oxygen concentration.
2. a kind of method of quickly removal cold steel of RH vacuum chamber according to claim 1, which is characterized in that adopted in step 3
Use the empty ladle for reaching service life as the Sheng slag ladle for accepting vacuum chamber fusing residue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742651.1A CN109423537A (en) | 2017-08-25 | 2017-08-25 | Method for quickly removing cold steel in RH vacuum chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742651.1A CN109423537A (en) | 2017-08-25 | 2017-08-25 | Method for quickly removing cold steel in RH vacuum chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109423537A true CN109423537A (en) | 2019-03-05 |
Family
ID=65500822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710742651.1A Pending CN109423537A (en) | 2017-08-25 | 2017-08-25 | Method for quickly removing cold steel in RH vacuum chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109423537A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438299A (en) * | 2019-09-02 | 2019-11-12 | 湖南华菱湘潭钢铁有限公司 | A method of the removal cold steel slag of RH vacuum tank |
| CN110819768A (en) * | 2019-11-20 | 2020-02-21 | 马鞍山钢铁股份有限公司 | Method for improving RH vacuum grooving cold steel efficiency for low-carbon aluminum killed steel |
| CN111979377A (en) * | 2020-08-11 | 2020-11-24 | 大冶特殊钢有限公司 | Method for recycling RH vacuum tank cold steel by using high-temperature airflow |
| CN113981189A (en) * | 2021-10-29 | 2022-01-28 | 中天钢铁集团有限公司 | Flue gas cleaning method in RH vacuum tank cold steel cleaning process |
| CN114703340A (en) * | 2022-03-14 | 2022-07-05 | 广东韶钢松山股份有限公司 | Method for reducing RH furnace and hot bent pipe junction cold steel slag |
| CN114752730A (en) * | 2022-05-18 | 2022-07-15 | 山西太钢不锈钢股份有限公司 | Method for improving AOD (argon oxygen decarburization) ignition success rate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892359A (en) * | 2010-07-21 | 2010-11-24 | 中国重型机械研究院有限公司 | Arrangement technology of multifunctional gun in refining outside RH furnace |
| JP5073269B2 (en) * | 2006-11-13 | 2012-11-14 | 株式会社神戸製鋼所 | Method of cooling the iron shell of RH equipment |
| CN102851456A (en) * | 2011-06-29 | 2013-01-02 | 鞍钢股份有限公司 | Method for online removing cold steel in RH vacuum chamber |
| CN104775007A (en) * | 2014-01-09 | 2015-07-15 | 宝山钢铁股份有限公司 | RH cold steel removing method |
| CN105714024A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Method for removing steel slag in bottom groove of RH vacuum chamber |
-
2017
- 2017-08-25 CN CN201710742651.1A patent/CN109423537A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5073269B2 (en) * | 2006-11-13 | 2012-11-14 | 株式会社神戸製鋼所 | Method of cooling the iron shell of RH equipment |
| CN101892359A (en) * | 2010-07-21 | 2010-11-24 | 中国重型机械研究院有限公司 | Arrangement technology of multifunctional gun in refining outside RH furnace |
| CN102851456A (en) * | 2011-06-29 | 2013-01-02 | 鞍钢股份有限公司 | Method for online removing cold steel in RH vacuum chamber |
| CN104775007A (en) * | 2014-01-09 | 2015-07-15 | 宝山钢铁股份有限公司 | RH cold steel removing method |
| CN105714024A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Method for removing steel slag in bottom groove of RH vacuum chamber |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438299A (en) * | 2019-09-02 | 2019-11-12 | 湖南华菱湘潭钢铁有限公司 | A method of the removal cold steel slag of RH vacuum tank |
| CN110819768A (en) * | 2019-11-20 | 2020-02-21 | 马鞍山钢铁股份有限公司 | Method for improving RH vacuum grooving cold steel efficiency for low-carbon aluminum killed steel |
| CN111979377A (en) * | 2020-08-11 | 2020-11-24 | 大冶特殊钢有限公司 | Method for recycling RH vacuum tank cold steel by using high-temperature airflow |
| CN113981189A (en) * | 2021-10-29 | 2022-01-28 | 中天钢铁集团有限公司 | Flue gas cleaning method in RH vacuum tank cold steel cleaning process |
| CN114703340A (en) * | 2022-03-14 | 2022-07-05 | 广东韶钢松山股份有限公司 | Method for reducing RH furnace and hot bent pipe junction cold steel slag |
| CN114752730A (en) * | 2022-05-18 | 2022-07-15 | 山西太钢不锈钢股份有限公司 | Method for improving AOD (argon oxygen decarburization) ignition success rate |
| CN114752730B (en) * | 2022-05-18 | 2023-03-21 | 山西太钢不锈钢股份有限公司 | Method for improving AOD (argon oxygen decarburization) ignition success rate |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190305 |
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| RJ01 | Rejection of invention patent application after publication |