CN110042187B - Device for modifying slag powder spraying and separating slag steel during converter tapping and use method - Google Patents
Device for modifying slag powder spraying and separating slag steel during converter tapping and use method Download PDFInfo
- Publication number
- CN110042187B CN110042187B CN201910460167.9A CN201910460167A CN110042187B CN 110042187 B CN110042187 B CN 110042187B CN 201910460167 A CN201910460167 A CN 201910460167A CN 110042187 B CN110042187 B CN 110042187B
- Authority
- CN
- China
- Prior art keywords
- slag
- powder spraying
- pipeline
- converter
- 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.)
- Active
Links
- 239000002893 slag Substances 0.000 title claims abstract description 161
- 239000000843 powder Substances 0.000 title claims abstract description 105
- 238000005507 spraying Methods 0.000 title claims abstract description 102
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 83
- 239000010959 steel Substances 0.000 title claims abstract description 83
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 57
- 230000000903 blocking effect Effects 0.000 claims abstract description 51
- 238000007664 blowing Methods 0.000 claims abstract description 33
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 28
- 239000007789 gas Substances 0.000 claims abstract description 21
- 230000004048 modification Effects 0.000 claims abstract description 14
- 238000012986 modification Methods 0.000 claims abstract description 14
- 239000003607 modifier Substances 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 7
- 239000011819 refractory material Substances 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims abstract description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 22
- 239000000395 magnesium oxide Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000007921 spray Substances 0.000 abstract description 5
- 239000006260 foam Substances 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000009628 steelmaking Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 150000003568 thioethers Chemical class 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
- 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
- C21C5/36—Processes yielding slags of special composition
-
- 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
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
-
- 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
- C21C7/072—Treatment with gases
-
- 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)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The device and the method for slag powder spraying modification and slag steel separation during converter tapping are characterized in that a gun body of the multi-channel pneumatic powder spraying slag blocking gun is formed by casting refractory materials, three steel pipes are used as gas channels, and a nozzle adopts a Laval form. The rear end of the powder spraying pipeline is connected with a nitrogen main pipeline and a rotary feeder, and the two air blowing pipelines spray nitrogen to the upper part of the steel tapping hole to separate slag steel. In the tapping process, a multichannel pneumatic powder spraying slag blocking gun is stretched into a converter, the gun head is aligned to a tap hole, and a powder spraying pipeline is used for spraying a slag modifier to carry out powder spraying modification on slag; the high-speed airflow is formed through the powder spraying pipeline and the air blowing pipeline to push away the slag to form a rigid pit above the steel tapping hole, and the powder spraying slag blocking gun and the converter are quickly retracted and shaken up after the steel tapping is finished. The invention carries out advanced modification on the slag in the tapping process, thickens the slag, reduces foam slag, pushes away the slag above the tapping hole by utilizing high-speed airflow, prevents the slag from being involved into molten steel vortex, reduces the slag discharging amount and improves the purity of the molten steel.
Description
Technical Field
The invention belongs to the technical field of steelmaking in the metallurgical industry, and particularly relates to a device and a use method for slag modification and slag-steel separation during converter tapping, in particular to a device and a use method for slag powder injection modification and slag-steel separation during converter tapping.
Background
During converter steelmaking, a large amount of molten steel slag is produced, and the molten steel slag has complex chemical components and mainly contains oxides such as CaO, mgO, feO, siO 2、P2O5 and MnO and partial sulfides. Slag discharging occurs in the middle and later stages of the tapping process of the converter, because the amount of molten steel in the converter gradually decreases as tapping is performed, and when the depth of the molten steel is lower than a certain critical value, a funnel-shaped confluence vortex appears above the tap hole, and part of steel slag is involved into the molten steel vortex flow and enters a ladle below the converter before tapping is finished. The steel slag is mixed into the steel ladle, so that the contents of impurity elements such as S, P, O and the like in the steel are increased, the subsequent processing of molten steel is not facilitated, and the finished product performance of the steel is damaged. Therefore, the slag discharging problem of converter tapping is solved, the content of phosphorus, sulfur and oxide inclusions in molten steel can be reduced, the purity of the molten steel is improved, the consumption of deoxidizer in the next working procedure is reduced, the alloy yield is improved, and finally the production cost of ton steel is reduced and the income is increased.
With the continuous improvement of the requirements on the quality of the molten steel of the converter, various slag blocking process technologies are developed by various steel factories, including: a slag-cutting disc method, a slag-stopping cover method, a sliding water gap method, a slag-stopping plug method, a slag-stopping ball method, a slag-stopping tank slag-stopping method, a pneumatic slag-stopping method, a siphon tapping method and the like. But only pneumatic slag blocking, slag blocking balls, slag blocking plugs and sliding gate slag blocking are widely applied to steel factories at home and abroad at present. The pneumatic slag blocking is to blow nitrogen from the outside of the steel tapping hole to the inside of the furnace, so that slag is blown away, the slag blocking effect is good, but air flow is blown from the outside to the inside, the flow direction of molten steel is reversed, the impact is larger, the splashing is larger, and equipment outside the furnace is easy to burn; the slag blocking ball or the slag blocking plug is characterized in that the slag blocking ball or the slag blocking plug is used for blocking the steel tapping hole to block slag from flowing into the steel ladle when tapping is finished by utilizing the characteristic that the specific gravity of the slag blocking ball or the slag blocking plug is between that of slag steel, but the slag blocking ball or the slag blocking plug is judged to be put into the steel ladle by means of naked eyes, so that slag liquid cannot be prevented from being mixed into the steel ladle, and the slag cannot be put into the steel tapping hole in a hundred percent manner; the slag blocking of the sliding water gap is realized by installing a sliding valve plate made of refractory materials outside the steel tapping hole of the converter, and the steel tapping hole is opened or closed in a mechanical or hydraulic control mode through an operating system, so that the slag blocking effect is good, but the cost is high, and meanwhile, the slag blocking device is inconvenient to install, disassemble, maintain and overhaul and is easily influenced by molten steel splashing during blowing. In addition, these methods simply use physical means to prevent tapping at the tap hole, and do not consider modifying treatment of slag using chemical principles, changing chemical and physical properties of slag, including alkalinity, viscosity, and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a device for modifying slag powder spraying and separating slag from steel during converter tapping and a use method thereof, wherein chemical principles and physical means are comprehensively utilized to modify slag and blow to stop slag during converter tapping, foam slag and thickened slag are reduced, slag is prevented from being involved in molten steel vortex, the purity of molten steel is improved, the consumption of alloy is reduced, and the comprehensive economic benefit of steelmaking is improved.
The device comprises a multi-channel pneumatic powder spraying slag blocking gun, wherein the multi-channel pneumatic powder spraying slag blocking gun consists of a gun body and gas channels, the cross section of the gun body is round and is formed by casting refractory materials, three steel pipes are used as gas channels in the middle of the gun body, the three steel pipes comprise a powder spraying pipeline and two gas blowing pipelines, and the three finished products are distributed in a shape of Chinese character 'mu'; the multichannel pneumatic powder spraying slag blocking gun is arranged on a support of a rail car and can move back and forth along with the front of the rail car, and the rail car is arranged on the upper surface of a furnace rear platform; the inlets at the rear ends of the powder spraying pipeline and the air blowing pipeline are connected with a main nitrogen pipeline through hoses, and the front end nozzles of the powder spraying pipeline and the air blowing pipeline are in Laval forms; the feed inlet at the rear end of the powder spraying pipeline is connected with the high-level stock bin through a rotary feeder and a pipeline and is used for providing slag modifier.
The diameter of the powder spraying pipeline is 30-35mm, and the diameter of the air blowing pipeline is 25-30mm.
The slag modifier adopts magnesia gunning material, the main component is MgO, the MgO content is more than 75 percent, and the adding amount of the magnesia gunning material is controlled at 20-30kg/min.
The hose at the rear ends of the powder spraying pipeline and the air blowing pipeline is connected with the main nitrogen pipeline through an adjusting valve.
The device for modifying the slag powder spraying and separating the slag steel during the tapping of the converter further comprises the converter, wherein the converter is positioned on the right side of the outlet of the multi-channel pneumatic powder spraying slag blocking gun, a tapping hole is formed in the side wall of the converter, which is close to one end of the multi-channel pneumatic powder spraying slag blocking gun, and the tapping hole is positioned at the joint of the inclined side wall and the vertical side wall of the converter.
The application method of the device for slag powder spraying modification and slag steel separation during converter tapping adopts the device for slag powder spraying modification and slag steel separation during converter tapping, and comprises the following steps:
step 1, when tapping is needed, tilting a converter to a rear platform direction by 90-95 degrees, enabling a furnace mouth to face a furnace rear product table, simultaneously operating a rail car to move to one end of the converter, feeding a gun head of a powder spraying slag blocking gun into the converter through the furnace mouth, adjusting the gun head of the powder spraying slag blocking gun to be aligned to the upper part of the tapping hole, and carrying out powder spraying modification on slag by utilizing a powder spraying pipeline of a multi-channel pneumatic powder spraying slag blocking gun; when the molten steel amount in the furnace is 50-60%, firstly opening a powder spraying pipeline to connect with an adjusting valve of a main nitrogen pipeline, adjusting the nitrogen flow of the powder spraying pipeline through the adjusting valve, then opening a switch of a rotary feeder, blowing slag modifier to slag by using high-speed nitrogen as a carrier until the slag thickens, closing the rotary feeder to finish powder spraying, still introducing nitrogen into the powder spraying pipeline, opening adjusting valves of two air blowing pipelines, and pushing away slag above a steel outlet by using high-speed air flow and forming a rigid pit after adjusting the total air flow of the powder spraying pipeline and the air blowing pipeline, wherein the continuously blown nitrogen can prevent the slag from flowing back above the steel outlet; and after tapping, operating the rail car to withdraw the multichannel pneumatic powder spraying slag stopping gun from the converter, and immediately shaking the converter when the gun head of the multichannel pneumatic powder spraying slag stopping gun leaves the mouth of the converter, so that the tapping process of the converter is finished.
The diameter of the rigid pit in the step 1 is 500-800mm; the nitrogen flow of the powder spraying pipeline is 300-500Nm 3/h; the total flow of the gas of the powder spraying pipeline and the gas blowing pipeline is 900-1200Nm 3/h.
The beneficial effects of the invention are as follows:
The novel multichannel pneumatic powder spraying slag blocking gun provided by the invention is utilized to spray magnesia gunning material to slag during tapping of a converter, so that the generation of foam slag can be reduced, the viscosity of molten steel can be improved, the slag can be effectively prevented from being mixed into the molten steel, and the slag splashing time can be shortened by modifying in advance; the high-speed nitrogen gas flow is blown on the molten steel surface above the steel tapping hole, so that slag can be completely blown off, a rigid pit without slag is formed, the pit can inhibit molten steel vortex from forming above the steel tapping hole, and the combined action of the high-speed gas and slag thickening can prevent the slag from flowing back to the steel tapping hole.
In addition, the multichannel pneumatic powder spraying slag blocking gun sprays on the surface of molten steel in the furnace, so that the impact is small, the spraying is not serious, the adverse effect is avoided, the gun body is mainly made of refractory materials, the cost is low, and explosion accidents caused by pipe explosion or water leakage of the water-cooling spray pipe are avoided. In conclusion, the invention achieves the expected effect, the slag modification and nitrogen blowing slag blocking effect is good, the slag steel is thoroughly separated, the thickness of a slag layer in the steel ladle is obviously reduced, the purity of molten steel is obviously improved, the consumption of deoxidizer and alloy is reduced, the cost of ton steel is reduced, and the steelmaking benefit is obviously improved.
Drawings
FIG. 1 is a schematic view of the novel device provided by the invention applied to converter tapping on-site;
FIG. 2 is a schematic structural view of the novel multi-channel pneumatic powder spraying slag blocking gun provided by the invention;
1. The device comprises a converter, a 2-channel pneumatic powder spraying slag blocking gun, a 3-tap hole, a 4-track car, a 5-furnace mouth, a 6-furnace rear platform, a 7-gun body, an 8-powder spraying pipeline, a 9-blowing pipeline, a 10-adjusting valve, a 11-main nitrogen pipeline.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
Example 1
As shown in fig. 1 and 2, the device for modifying slag powder spraying and separating slag steel during converter tapping comprises a multi-channel pneumatic powder spraying slag blocking gun 2, wherein the multi-channel pneumatic powder spraying slag blocking gun 2 consists of a gun body 7 and gas channels, the cross section of the gun body 7 is round and is formed by casting refractory materials, three steel pipes are used as the gas channels in the middle of the gun body 7, the device comprises a powder spraying pipeline 8 with the diameter of 35mm and two gas blowing pipelines 9 with the diameter of 30mm as the gas channels, and the powder spraying pipeline 8 and the two gas blowing pipelines 9 are distributed in a finished product shape; the multichannel pneumatic powder spraying slag blocking gun 2 is arranged on a support of the rail car 4 and can move back and forth along with the rail car 4, and the rail car 4 is arranged on the upper surface of the furnace rear platform 6; the inlets at the rear ends of the powder spraying pipeline 8 and the air blowing pipeline 9 are connected with a main nitrogen pipeline 11 through hoses, the hoses at the rear ends of the powder spraying pipeline 8 and the air blowing pipeline 9 are connected with the main nitrogen pipeline 11 through an adjusting valve 10, and the spray nozzles at the front ends of the powder spraying pipeline 8 and the air blowing pipeline 9 are in Laval forms, so that the flow rate of a gas outlet is improved; the feeding port at the rear end of the powder spraying pipeline 8 is connected with a high-level stock bin through a rotary feeder and a pipeline and is used for providing a slag modifier, wherein the slag modifier adopts magnesium gunning material, the main component is MgO, the MgO content is more than 75%, the adding amount of the magnesium gunning material is controlled to be 20-30kg/min, and when the slag overflow phenomenon occurs in the early stage of tapping, the slag modifier can be used for spraying powder to modify and reduce foam slag; spraying powder to the slag in the middle and later stages of tapping to modify and thicken the slag, and stopping spraying powder after the viscosity of the slag is suitable for blowing and stopping slag; the device for modifying the slag powder spraying and separating slag steel during converter tapping further comprises a converter 1, wherein the converter 1 is positioned on the opposite side of an outlet of the multi-channel pneumatic powder spraying slag blocking gun 2, a tapping hole 3 is formed in the side wall, close to one end of the multi-channel pneumatic powder spraying slag blocking gun 2, of the converter 1, and the tapping hole 3 is positioned at the joint of the inclined side wall and the vertical side wall of the converter 1.
The application method of the device for slag powder spraying modification and slag steel separation during converter tapping adopts the device for slag powder spraying modification and slag steel separation during converter tapping, and comprises the following steps:
Step 1, when tapping is needed, tilting a converter 1 to 90-95 degrees towards a rear platform 6, enabling a furnace mouth 5 to face a rear product platform 6, simultaneously operating a rail car 4 to move towards one end of the converter 1, feeding gun heads of a multi-channel pneumatic powder spraying slag blocking gun 2 into the converter 1 through the furnace mouth 5, adjusting gun heads of the multi-channel pneumatic powder spraying slag blocking gun 2 to be aligned to the upper part of a tap hole 3, and carrying out powder spraying modification on slag by using a powder spraying pipeline 8 of the multi-channel pneumatic powder spraying slag blocking gun 2; when the molten steel amount in the furnace is 50-60%, firstly opening a regulating valve 10 of a powder spraying pipeline 8 connected with a main nitrogen pipeline 11, enabling the nitrogen flow of the powder spraying pipeline 8to be within 300Nm 3/h through the regulating valve 10, then opening a switch of a rotary feeder, controlling the adding amount of a slag modifier to be 25kg/min, blowing the slag modifier to slag by using high-speed nitrogen as a carrier until the slag is thickened, closing the rotary feeder, after finishing powder spraying, the powder spraying pipeline 8 is still filled with nitrogen, opening regulating valves 10 of two air blowing pipelines 9, controlling the total gas flow of one powder spraying pipeline 8 and the two air blowing pipelines 9 to be 900Nm 3/h, pushing the slag above a steel outlet 3 by using high-speed air flow, and forming a rigid 'pit' with the diameter of 600mm, and continuously blowing the nitrogen to prevent the slag from flowing back to the upper part of the steel outlet 3; after tapping is finished, the rail car 4 is operated to withdraw the multichannel pneumatic powder spraying slag stopping gun 2 from the converter 1, and when the gun head of the multichannel pneumatic powder spraying slag stopping gun 2 leaves the furnace mouth 5 of the converter 1, the converter 1 is immediately shaken up, so that the tapping process of the converter 1 is finished.
Claims (5)
1. The device for modifying the slag powder spraying and separating slag steel during converter tapping is characterized by comprising a multi-channel pneumatic powder spraying slag blocking gun, wherein the multi-channel pneumatic powder spraying slag blocking gun consists of a gun body and gas channels, the cross section of the gun body is round and is formed by casting refractory materials, three steel pipes are used as gas channels in the middle of the gun body, the three steel pipes comprise a powder spraying pipeline and two gas blowing pipelines, and the three finished products are distributed in a shape; the multichannel pneumatic powder spraying slag blocking gun is arranged on a support of a rail car and can move back and forth along with the front of the rail car, and the rail car is arranged on the upper surface of a furnace rear platform; the inlets at the rear ends of the powder spraying pipeline and the air blowing pipeline are connected with a main nitrogen pipeline through hoses, and the front end nozzles of the powder spraying pipeline and the air blowing pipeline are in Laval forms; the feed inlet at the rear end of the powder spraying pipeline is connected with a high-level stock bin through a rotary feeder and a pipeline and is used for providing slag modifier;
the diameter of the powder spraying pipeline is 30-35mm, and the diameter of the air blowing pipeline is 25-30mm.
2. The device for modifying slag powder injection and separating slag steel during converter tapping according to claim 1, wherein the device comprises the following components: the slag modifier adopts magnesia gunning material, the main component is MgO, the MgO content is more than 75 percent, and the adding amount of the magnesia gunning material is controlled at 20-30kg/min.
3. The device for modifying slag powder injection and separating slag steel during converter tapping according to claim 1, wherein the device comprises the following components: the hose at the rear ends of the powder spraying pipeline and the air blowing pipeline is connected with the main nitrogen pipeline through an adjusting valve.
4. The device for modifying slag powder injection and separating slag steel during converter tapping according to claim 1, wherein the device comprises the following components: the device also comprises a converter, wherein the converter is positioned on the right opposite side of the outlet of the multi-channel pneumatic powder spraying slag blocking gun, a steel tapping hole is arranged on the side wall of the converter, which is close to one end of the multi-channel pneumatic powder spraying slag blocking gun, and the steel tapping hole is positioned at the joint of the inclined side wall and the vertical side wall of the converter.
5. A method for using the slag powder injection modification and slag steel separation device during converter tapping, which is characterized by comprising the following steps:
When tapping is needed, tilting the converter by 90-95 degrees towards a rear platform of the converter, enabling a furnace mouth to face a rear product table of the converter, simultaneously operating a rail car to move towards one end of the converter, feeding a gun head of a powder spraying slag blocking gun into the converter through the furnace mouth, adjusting the gun head of the powder spraying slag blocking gun to be aligned to the upper part of the tapping hole, and carrying out powder spraying modification on slag by utilizing a powder spraying pipeline of the multi-channel pneumatic powder spraying slag blocking gun; when the molten steel amount in the furnace is 50-60%, firstly opening a regulating valve of a powder spraying pipeline connected with a main nitrogen pipeline, regulating the nitrogen flow of the powder spraying pipeline through the regulating valve, and then opening a switch of a rotary feeder, wherein the nitrogen flow of the powder spraying pipeline is 300-500Nm 3/h, and the total gas flow of the powder spraying pipeline and the gas blowing pipeline is 900-1200Nm 3/h; blowing a slag modifier to slag by using high-speed nitrogen as a carrier until the slag is thickened, closing a rotary feeder to finish powder spraying, still introducing nitrogen into a powder spraying pipeline, opening regulating valves of two gas blowing pipelines, pushing away the slag above a steel outlet by using high-speed air flow after adjusting the total air flow of the powder spraying pipeline and the gas blowing pipelines, and forming a rigid pit with the diameter of 500-800mm, wherein the continuously blown nitrogen can prevent the slag from flowing back to the upper part of the steel outlet; and after tapping, operating the rail car to withdraw the multichannel pneumatic powder spraying slag stopping gun from the converter, and immediately shaking the converter when the gun head of the multichannel pneumatic powder spraying slag stopping gun leaves the mouth of the converter, so that the tapping process of the converter is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460167.9A CN110042187B (en) | 2019-05-30 | 2019-05-30 | Device for modifying slag powder spraying and separating slag steel during converter tapping and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460167.9A CN110042187B (en) | 2019-05-30 | 2019-05-30 | Device for modifying slag powder spraying and separating slag steel during converter tapping and use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110042187A CN110042187A (en) | 2019-07-23 |
| CN110042187B true CN110042187B (en) | 2024-05-28 |
Family
ID=67284121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910460167.9A Active CN110042187B (en) | 2019-05-30 | 2019-05-30 | Device for modifying slag powder spraying and separating slag steel during converter tapping and use method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110042187B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226576B (en) * | 2020-09-27 | 2023-07-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Device and method for carbon spraying and deoxidizing by utilizing slag blocking system |
| CN113832286B (en) * | 2021-09-17 | 2023-01-17 | 东北大学 | Device and method for powder injection dephosphorization and slag blocking at converter steel tapping hole and composite dephosphorization agent |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10176212A (en) * | 1996-12-18 | 1998-06-30 | Sumitomo Metal Ind Ltd | Method for preventing flow-out of slag at the time of discharging molten steel |
| KR20010065418A (en) * | 1999-12-29 | 2001-07-11 | 이구택 | Lance for powder blasting at high speed |
| CN101880751A (en) * | 2009-05-07 | 2010-11-10 | 营口东邦冶金设备耐材有限公司 | Composite desulfurization/dephosphorization spray gun for molten iron |
| CN201969631U (en) * | 2011-02-28 | 2011-09-14 | 攀钢集团钢铁钒钛股份有限公司 | Spray gun |
| CN102978341A (en) * | 2012-12-24 | 2013-03-20 | 营口戴斯玛克科技发展有限公司 | Desulfuration spray gun for molten iron refining |
| CN104263877A (en) * | 2014-10-14 | 2015-01-07 | 钢铁研究总院 | Powder spraying and blowing combined spray gun for treating molten iron with medium and high phosphorus content in converter as well as application method |
| CN104759613A (en) * | 2015-04-15 | 2015-07-08 | 中冶南方工程技术有限公司 | Molten iron tank slag removal system and method |
| WO2015102190A1 (en) * | 2013-12-30 | 2015-07-09 | 주식회사 우진 | Gas injection lance having rotating injecting nozzle, and slag outflow preventing device equipped with same |
| CN105624358A (en) * | 2016-01-12 | 2016-06-01 | 中冶赛迪上海工程技术有限公司 | Method for producing low-phosphorous steel by single converter and double oxygen lances |
| CN105714013A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Control method for vortex slag entrapment during converter tapping |
| CN106048136A (en) * | 2016-07-27 | 2016-10-26 | 北京科技大学 | Online steelmaking tapping process powder injection deoxidizing method and system |
| JP3213241U (en) * | 2017-08-16 | 2017-10-26 | 唐山正豊鋼鉄有限公司 | Out-of-furnace molten steel dephosphorization system |
| CN109136455A (en) * | 2018-10-15 | 2019-01-04 | 马鞍山钢铁股份有限公司 | A method of it bessemerizing terminal slag bubble and quickly eliminates |
| CN109306392A (en) * | 2017-07-27 | 2019-02-05 | 佟萌 | A kind of use for refining molten steel air-flow dusts element with spray formula Ladle Bottom |
| CN209974818U (en) * | 2019-05-30 | 2020-01-21 | 无锡东大汉森冶金实业有限公司 | Device for modifying slag powder spraying and separating slag and steel during converter tapping |
-
2019
- 2019-05-30 CN CN201910460167.9A patent/CN110042187B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10176212A (en) * | 1996-12-18 | 1998-06-30 | Sumitomo Metal Ind Ltd | Method for preventing flow-out of slag at the time of discharging molten steel |
| KR20010065418A (en) * | 1999-12-29 | 2001-07-11 | 이구택 | Lance for powder blasting at high speed |
| CN101880751A (en) * | 2009-05-07 | 2010-11-10 | 营口东邦冶金设备耐材有限公司 | Composite desulfurization/dephosphorization spray gun for molten iron |
| CN201969631U (en) * | 2011-02-28 | 2011-09-14 | 攀钢集团钢铁钒钛股份有限公司 | Spray gun |
| CN102978341A (en) * | 2012-12-24 | 2013-03-20 | 营口戴斯玛克科技发展有限公司 | Desulfuration spray gun for molten iron refining |
| WO2015102190A1 (en) * | 2013-12-30 | 2015-07-09 | 주식회사 우진 | Gas injection lance having rotating injecting nozzle, and slag outflow preventing device equipped with same |
| CN104263877A (en) * | 2014-10-14 | 2015-01-07 | 钢铁研究总院 | Powder spraying and blowing combined spray gun for treating molten iron with medium and high phosphorus content in converter as well as application method |
| CN105714013A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Control method for vortex slag entrapment during converter tapping |
| CN104759613A (en) * | 2015-04-15 | 2015-07-08 | 中冶南方工程技术有限公司 | Molten iron tank slag removal system and method |
| CN105624358A (en) * | 2016-01-12 | 2016-06-01 | 中冶赛迪上海工程技术有限公司 | Method for producing low-phosphorous steel by single converter and double oxygen lances |
| CN106048136A (en) * | 2016-07-27 | 2016-10-26 | 北京科技大学 | Online steelmaking tapping process powder injection deoxidizing method and system |
| CN109306392A (en) * | 2017-07-27 | 2019-02-05 | 佟萌 | A kind of use for refining molten steel air-flow dusts element with spray formula Ladle Bottom |
| JP3213241U (en) * | 2017-08-16 | 2017-10-26 | 唐山正豊鋼鉄有限公司 | Out-of-furnace molten steel dephosphorization system |
| CN109136455A (en) * | 2018-10-15 | 2019-01-04 | 马鞍山钢铁股份有限公司 | A method of it bessemerizing terminal slag bubble and quickly eliminates |
| CN209974818U (en) * | 2019-05-30 | 2020-01-21 | 无锡东大汉森冶金实业有限公司 | Device for modifying slag powder spraying and separating slag and steel during converter tapping |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110042187A (en) | 2019-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209974818U (en) | Device for modifying slag powder spraying and separating slag and steel during converter tapping | |
| CN100370036C (en) | Slit type ladle bottom blowing powder injection process and apparatus | |
| CN104480251B (en) | The pretreatment unit of molten iron simultaneously desulfurization, desiliconization, dephosphorization and application and smelting method | |
| CN110042187B (en) | Device for modifying slag powder spraying and separating slag steel during converter tapping and use method | |
| TWI448555B (en) | Method of refining molten iron | |
| CN102643946A (en) | Converter steelmaking method through power injection dephosphorization by adopting supersonic speed oxygen lance and supersonic speed oxygen lance | |
| CN103667581B (en) | A kind of low nitrogen SWRH82B smelting steel method | |
| CN113930574A (en) | Slag splashing fettling method beneficial to furnace bottom maintenance | |
| CN105624358B (en) | A kind of method of single-turn stove dioxygen rifle production Low-phosphorus Steel | |
| CN107034336B (en) | A kind of device and method for improving converter and splashing slag effect | |
| CN105420452B (en) | A kind of supersonic speed shower nozzle of anti-slag | |
| CN214270950U (en) | LF stove is concise blows slag face deoxidation device | |
| CN114015828A (en) | Slag splashing furnace protection method for modifying converter slag through bottom blowing powder injection | |
| CN105441624B (en) | Gun head structure and method for regulating converter top blown oxygen flow by double-path oxygen flow | |
| CN112609042B (en) | Method for modifying slag in final casting stage of ladle with cover | |
| CN114959158A (en) | Efficient desulfurization, desilicication and dephosphorization method for molten iron runner self-rotating flow | |
| CN203238298U (en) | Torpedo ladle desulfurization spray gun with multi-segment nozzle structure | |
| CN204237812U (en) | The pretreatment unit of the desulfurization simultaneously of a kind of molten iron, desiliconization, dephosphorization | |
| CN105219909B (en) | Molten iron desulfuring spray gun is directly blown for magnesium desulfurizer | |
| CN212293649U (en) | HIsmelt technology composite desulfurization recarburization device | |
| CN205313599U (en) | Rifle head structure of converter top blowing oxygen flow is adjusted to double - circuit oxygen flow | |
| CN113832286A (en) | Device and method for powder injection dephosphorization and slag blocking at converter steel tapping hole and composite dephosphorization agent | |
| CN206204349U (en) | A kind of anticlogging iron melt pretreating spray gun | |
| CN107723416B (en) | Ladle rotation spray gun dephosphorization device | |
| CN112680568A (en) | LF stove is concise blows slag face deoxidation device |
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 | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 215600 Xiangyang Village, Jinfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Applicant after: Suzhou Dongda Hansen Metallurgical Industry Co.,Ltd. Address before: Nantang community, Qianqiao street, Huishan District, Wuxi City, Jiangsu Province Applicant before: Shenyang Dongye Hansen Metallurgy Equipment Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |