CN107012279A - Molten iron slagging-off method for horizontal blowing slag removal - Google Patents
Molten iron slagging-off method for horizontal blowing slag removal Download PDFInfo
- Publication number
- CN107012279A CN107012279A CN201610059453.0A CN201610059453A CN107012279A CN 107012279 A CN107012279 A CN 107012279A CN 201610059453 A CN201610059453 A CN 201610059453A CN 107012279 A CN107012279 A CN 107012279A
- Authority
- CN
- China
- Prior art keywords
- slag
- gun
- molten iron
- air
- jet
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 239000002893 slag Substances 0.000 title claims abstract description 46
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007664 blowing Methods 0.000 title abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 claims abstract description 6
- 230000037431 insertion Effects 0.000 claims abstract description 6
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 3
- 239000005864 Sulphur Substances 0.000 claims description 6
- 235000006679 Mentha X verticillata Nutrition 0.000 claims description 5
- 235000002899 Mentha suaveolens Nutrition 0.000 claims description 5
- 235000001636 Mentha x rotundifolia Nutrition 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 abstract description 4
- 239000011593 sulfur Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000006477 desulfuration reaction Methods 0.000 abstract description 2
- 230000023556 desulfurization Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 24
- 230000008569 process Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 239000010959 steel Substances 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
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/005—Removing slag from a molten metal surface
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention provides a molten iron slagging-off method for flat blowing slag removal, which is characterized in that an air gun consisting of a gun body and a gun head is manufactured, the gun head and the gun body are connected through a screw port, and the front end of an air blowing pipe of the gun head is provided with a linear or cross air blowing hole. When the hot-metal ladle is tilted to a slag skimming position, vertically inserting 1 air lance from the top of the hot-metal ladle, wherein the insertion depth of the air lance is that an air hole of an air blowing pipe is positioned on the surface of molten iron or is slightly lower than the surface of the molten iron; when the air gun descends, air starts to be supplied, the air supply intensity is not less than 1.5 NL/(min.t), and the pressure is more than 0.5 MPa; adjusting the flow according to the condition of the slag, and stabilizing the gas flow and starting to slag off when the gas flow can smoothly blow open top slag and the exposed molten iron area is not less than 2/3; and after slagging off is finished, lifting the air gun and then stopping the gas. The invention has the advantages of simple structure, convenient construction, high operation efficiency and low failure rate. The slag skimming time can be shortened, the slag skimming effect is improved, and the iron loss and the converter sulfur return amount during desulfurization and slag skimming are greatly reduced.
Description
Technical field
The invention belongs to hot metal pretreatment technology field, the clinker after more particularly to a kind of dephosphorization, desiliconization and desophorization for hot metal or single desulfurization removes method.
Background technology
After molten iron pretreatment, to prevent later process " returning sulphur ", " rephosphorization ", increase metallurgy lime consumes and causes quality accident
Etc. reason, it is necessary to which top slag of the molten iron after de- is removed.For top slag is smoothly removed, current Normal practice is input Slag conglomeration agent,
The top slag of good fluidity is become sticky, recycles manipulator to concentrate and removes, the requirement because of indivedual steel grades to sulfur content is tight sometimes
Lattice, particularly with pure magnesium powder sulfur removal technology is blown, the dilute amount of slag is small, generally requires repeatedly to put into Slag conglomeration agent.So, not only increase
Slag conglomeration agent is consumed, and can be increased molten iron and taken off damage.
Application number 200710015162.2 provides a kind of molten iron pot narrow gap gas-blowing slag-removing device and operating procedure, and its narrow slit is blown and removed
The mechanical arm that slag device is made up of first, second hydraulic cylinder, first, second ultrasonic transformer and turning joint, mechanical arm, which is provided with, to be blown
Pipe, blowpipe is provided with gas connection pipe and narrow slit shape nozzle, and its operating procedure is:A. first by gas connection pipe connected nitrogen tube or
Air compressor；B. after hot-metal bottle being tilted into certain angle in position of skimming, narrow slit shape nozzle and iron are adjusted by amplitude-variable mechanical arm
The top of the slag distance of water pot, is then driven to hot-metal bottle to top of the slag nitrogen-blow or compressed air by narrow slit shape nozzle by liquid slag
Outside mouthful.Narrow slit that this method is used is blown it is difficult to ensure that difficulty is built in service life, increase tank lining cutting, and due to some air blowing,
Top slag can only be blown out " falcate ", bent moon two ends top slag, which is removed, still to acquire a certain degree of difficulty.
Application number 201010272903.7 discloses a kind of blowing slag-removing equipment for molten iron pretreatment, including guide rail, pivoting support, can
Adjust bearing, guide roller, jockey sprocket, lifting drive, lift cart, inflatable bar and refractory segment.Guide rail is inclined at
Above hot-metal bottle, lift cart is arranged on guide rail, and lifting drive is driven lift cart along above and below guide rail by jockey sprocket
Motion.Pivoting support is connected in the middle part of guide upper, adjustable seats connection guide rail, and guide roller is arranged on guide rail bottom, pivoting support
And adjustable seats are each attached to and skimmed on machine platform.Inflatable bar is arranged on lift cart, and refractory segment is connected to inflatable bar bottom.
When Cinder Machine works, inflatable bar is inserted into nitrogen blowing in ladle.With the progress for the process of skimming, the quantity of slag is constantly reduced, iron
Water exposed surface constantly expands, until slag is almost removed completely.Because jet gun is tilting insertion molten iron, in spite of guide rail and
The effect of bearing, certain amount of deflection will be unavoidably produced under natural gravity effect, and refractory material only possesses insulation energy
Power, jet gun upper epidermis refractory material easily produces micro-crack under a stretching force, can accelerate molten iron erosive velocity, and jet gun is inserted
Entering the service life of part can greatly shorten.
The content of the invention
It is contemplated that overcome the defect of prior art, and then offer one kind can reduce residue and iron loss, effectively shorten slag-removing time
Flat blow the molten iron drossing method for catching up with slag.
For up to this purpose, this invention takes following technical solution：
A kind of to equal the molten iron drossing method blown and catch up with slag, its concrete operation step is：
(1) jet gun is made：Jet gun includes the permanent gun body in top and bottom jet pipette tips, and jet pipette tips are 1~1.2 meter long
Resistance to material, pipette tips and gun body are connected by screw socket, and gun body 1 is provided with gas blow pipe 3, the gas blow pipe front end band of pipette tips with the center of pipette tips 2
There are in-line or cross gas hole；
(2) set two sets by control button and control hand valve group into control operation disk：One is sheathed on the lower rifle position on operating platform
Put, it is another to be set on forklift for slag or interior of skimming；
(3) rifle is operated under：Taken off after sulphur, when hot-metal bottle tipping is to when skimming, from hot-metal bottle at the top of be inserted perpendicularly into molten iron face
1 jet gun, 0.8~1.2 meter away from tank skin of jet gun insertion position, insertion depth is located at molten iron surface for the gas hole of gas blow pipe
Or slightly less than molten iron surface；
(4) jet is operated：Jet gun starts supply when declining, air supply intensity is not less than 1.5NL/ (mint), and pressure is more than
0.5MPa；Flow is adjusted according to clinker situation, when gas flow can smoothly blow top slag open, exposed molten iron area is not less than 2/3
When, stabilizing gas flux, and start to skim；
(5) skim after end, first carry jet gun and close down gas again.
Beneficial effects of the present invention are：
1. method of the present invention by being inserted perpendicularly into jet gun, solves the problems, such as the amount of deflection of spear, makes mechanical structure simpler.
2. the present invention only needs a jet gun, easy construction, operating efficiency is high, and fault rate is relatively fewer.
3. the method that the present invention blows slag by horizontal top layer, residue is effectively assembled, be conducive to skimming more thoroughly, greatly subtract
Sulfur content is returned in converter when light iron loss and desulphurization and slag skimming.
Brief description of the drawings
Fig. 1 is air gun structure schematic diagram.
In figure：Gun body 1, screw socket 2, gas blow pipe 3, pipette tips 4, gas hole 5.
Embodiment
Make jet gun：Jet gun includes the permanent gun body 1 in top and bottom jet pipette tips 2, and jet pipette tips 2 are 1 meter long resistance to material,
Pipette tips 2 and gun body 1 are connected by screw socket, and gun body 1 is provided with gas blow pipe 3, the gas blow pipe 3 in pipette tips 4 with the center of pipette tips 2
Front end carries in-line or cross gas hole 5, realizes the air blowing of multiple directions.
Set two sets by control button and control hand valve group into control operation disk：The one lower rifle position being sheathed on operating platform is put,
It is another to be set on forklift for slag or interior of skimming.
Flat blow of 3 stoves is carried out with reference to desulfurizing iron and catches up with slag molten iron drossing embodiment, and the invention will be further described.
Embodiment 1：
Hot-metal bottle charge weight is 260 tons, 1400 DEG C of molten iron temperature.The normal quantity of slag of taking off is 5 tons/tank.
The gas hole 5 of jet gun is set for in-line, a diameter of 11mm of gas hole 5.Jet gun gun body 1 passes through spiral shell with pipette tips 4
Mouth 2 is connected, and coupling part is in order to prevent top slag splash to interface, to be unfavorable for pipette tips 4 and change, and in joint, parcel asbestos are resistance to
Material, and fixed tightly with iron wire.The asbestos that only need to dismantle when changing pipette tips 4 just can very easily change pipette tips 4.
Take off after sulphur, hot-metal bottle tipping to position of skimming.Then start to fall jet gun, when jet gun drops to gas hole 5 just
Stop during into molten iron, work of skimming manually adjusts jet gun air supply intensity to 2.5NL/ (mint), at this moment jet gun can have
Top slag is blown to skimming gate by effect.Start to skim, process of skimming is according to top slag aggregation extent fine setting jet gun flow.Skim after end,
Rifle is carried, and continues to supply 1min.Iron loss 4.2t/ tanks.
Embodiment 2：
Hot-metal bottle charge weight is 265 tons, 1350 DEG C of molten iron temperature.The normal quantity of slag of taking off is 5.1 tons/tank.
The gas hole 5 of jet gun is in-line, a diameter of 12mm of gas hole 5.
Take off after sulphur, hot-metal bottle tipping to position of skimming.Then start to fall jet gun, when jet gun drops to gas hole 5 just
Stop during into molten iron, work of skimming manually adjusts jet gun air supply intensity to 2.8NL/ (mint), at this moment jet gun can have
Top slag is blown to skimming gate by effect.Start to skim, process of skimming is according to top slag aggregation extent fine setting jet gun flow.Skim after end,
Rifle is carried, and continues to supply 1min.Iron loss 4.1t/ tanks.
Embodiment 3：
Hot-metal bottle charge weight is 270 tons, 1380 DEG C of molten iron temperature.The normal quantity of slag of taking off is 5.2 tons/tank.
The gas hole 5 of jet gun is cross, a diameter of 11mm of gas hole 5.
Take off after sulphur, hot-metal bottle tipping to position of skimming.Then start to fall jet gun, when jet gun drops to gas hole 5 just
Stop during into molten iron, work of skimming manually adjusts jet gun air supply intensity to 2.6NL/ (mint), at this moment jet gun can have
Top slag is blown to skimming gate by effect.Start to skim, process of skimming is according to top slag aggregation extent fine setting jet gun flow.Skim after end,
Rifle is carried, and continues to supply 1min.Iron loss 4.4t/ tanks.
Claims (1)
1. flat the molten iron drossing method for catching up with slag is blown a kind of, it is characterised in that concrete operation step is：
(1) jet gun is made：Jet gun includes the permanent gun body in top and bottom jet pipette tips, and jet pipette tips are
1~1.2 meter long resistance to material, pipette tips and gun body are connected by screw socket, and gun body is provided with gas blow pipe, rifle with pipette tips center
The gas blow pipe front end of head carries in-line or cross gas hole；
(2) set two sets by control button and control hand valve group into control operation disk：One, which is sheathed on operation, puts down
Lower rifle position on platform is put, another to be set on forklift for slag or interior of skimming；
(3) rifle is operated under：Taken off after sulphur, when hot-metal bottle tipping is to when skimming, from hot-metal bottle at the top of and iron
The water surface is inserted perpendicularly into 1 jet gun, 0.8~1.2 meter away from tank skin of jet gun insertion position, and insertion depth is to blow
The gas hole of tracheae is located at molten iron surface or slightly less than molten iron surface；
(4) jet is operated：Jet gun starts supply when declining, air supply intensity is not less than 1.5NL/ (mint),
Pressure is more than 0.5MPa；Flow is adjusted according to clinker situation, when gas flow can smoothly blow top slag open, made
When exposed molten iron area is not less than 2/3, stabilizing gas flux, and start to skim；
(5) skim after end, first carry jet gun and close down gas again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610059453.0A CN107012279A (en) | 2016-01-27 | 2016-01-27 | Molten iron slagging-off method for horizontal blowing slag removal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610059453.0A CN107012279A (en) | 2016-01-27 | 2016-01-27 | Molten iron slagging-off method for horizontal blowing slag removal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107012279A true CN107012279A (en) | 2017-08-04 |
Family
ID=59438698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610059453.0A Pending CN107012279A (en) | 2016-01-27 | 2016-01-27 | Molten iron slagging-off method for horizontal blowing slag removal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107012279A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107779554A (en) * | 2017-10-31 | 2018-03-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Desulfurizing iron blowing slag-removing device |
| CN113337674A (en) * | 2021-05-31 | 2021-09-03 | 攀钢集团攀枝花钢钒有限公司 | Air blowing slag removing gun and slag removing method |
| CN114737018A (en) * | 2022-05-07 | 2022-07-12 | 湖南华菱涟源钢铁有限公司 | Consumable air gun for slagging off molten iron and use method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201331268Y (en) * | 2008-12-30 | 2009-10-21 | 中钢设备有限公司 | Air assist slagging-off device |
| CN201778055U (en) * | 2010-06-25 | 2011-03-30 | 上海梅山钢铁股份有限公司 | Air blow gun for blowing air and removing slag |
| CN102031339A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Molten iron slagging-off method |
| CN203972854U (en) * | 2014-07-10 | 2014-12-03 | 鞍钢民企机电检修公司 | Spring up the micro-damage system of the skimming cross jet gun of formula molten iron |
| CN204401043U (en) * | 2014-12-10 | 2015-06-17 | 马钢(集团)控股有限公司 | A kind of molten iron drossing device |
| 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 |
-
2016
- 2016-01-27 CN CN201610059453.0A patent/CN107012279A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201331268Y (en) * | 2008-12-30 | 2009-10-21 | 中钢设备有限公司 | Air assist slagging-off device |
| CN102031339A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Molten iron slagging-off method |
| CN201778055U (en) * | 2010-06-25 | 2011-03-30 | 上海梅山钢铁股份有限公司 | Air blow gun for blowing air and removing slag |
| CN203972854U (en) * | 2014-07-10 | 2014-12-03 | 鞍钢民企机电检修公司 | Spring up the micro-damage system of the skimming cross jet gun of formula molten iron |
| CN204401043U (en) * | 2014-12-10 | 2015-06-17 | 马钢(集团)控股有限公司 | A kind of molten iron drossing device |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107779554A (en) * | 2017-10-31 | 2018-03-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Desulfurizing iron blowing slag-removing device |
| CN113337674A (en) * | 2021-05-31 | 2021-09-03 | 攀钢集团攀枝花钢钒有限公司 | Air blowing slag removing gun and slag removing method |
| CN114737018A (en) * | 2022-05-07 | 2022-07-12 | 湖南华菱涟源钢铁有限公司 | Consumable air gun for slagging off molten iron and use method |
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Application publication date: 20170804 |
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