CN115627316B - Dust-proof device and method for feeding and summarizing - Google Patents
Dust-proof device and method for feeding and summarizing Download PDFInfo
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- CN115627316B CN115627316B CN202211217831.5A CN202211217831A CN115627316B CN 115627316 B CN115627316 B CN 115627316B CN 202211217831 A CN202211217831 A CN 202211217831A CN 115627316 B CN115627316 B CN 115627316B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 140
- 239000000956 alloy Substances 0.000 claims abstract description 140
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 111
- 239000010959 steel Substances 0.000 claims abstract description 111
- 239000000428 dust Substances 0.000 claims description 45
- 238000010079 rubber tapping Methods 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 23
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims 2
- 238000009628 steelmaking Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 230000008569 process Effects 0.000 description 8
- 238000003723 Smelting Methods 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001603 reducing effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000002436 steel type Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
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- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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- 238000007670 refining Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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Classifications
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- 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
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- 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
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to the field of converter steelmaking, in particular to a feeding, collecting and dust-insulating device and a method, wherein the feeding, collecting and dust-insulating device comprises an alloy collecting pipe (6), N air pipes (8) and an annular air pipe (9), and N is more than or equal to 2; the annular air pipe (9) is semi-encircling the top end of the alloy collecting pipe (6), N openings are uniformly formed in the lower end of the annular air pipe (9), and N is more than or equal to 2; the air pipes (8) are uniformly distributed on the upper half section of the alloy collecting pipe (6) in a surrounding mode, the upper openings of the air pipes (8) are connected to the openings of the corresponding annular air pipes (9), and the lower openings of the air pipes (8) are inserted into the alloy collecting pipe (6) for application. The method can be applied to any steel plant and has the advantages of wide application range, high popularization value and the like.
Description
Technical Field
The invention relates to the field of converter steelmaking, in particular to a feeding and collecting dust-proof device and method.
Background
A conventional converter steelmaking system is characterized in that molten iron and scrap steel are smelted into qualified molten steel, the qualified molten steel is placed into a ladle through a tapping hole of a converter, the ladle is lifted by a crane to be transported to refining, and the molten steel is further processed. Because the molten steel components at the smelting end point of the converter are generally lower than the steel types, such as carbon, silicon, manganese, microelements such as chromium, vanadium, nickel and the like are far lower than the steel types, and different alloy elements in the steel have different functions, such as grain refinement, strength improvement, steel technological properties improvement and the like, when tapping, a special alloy blanking system is used for weighing and blanking alloys corresponding to the steel types to the alloy collection after the converter, and component adjustment is carried out in the process of tapping to the steel ladle. In addition, some necessary deoxidizing agent and auxiliary materials can be added into the ladle through the channel.
Various alloys, deoxidizers and auxiliary materials added through alloy summarizing are mostly in a block shape, a certain powder surface or crushed aggregates can be generated in the feeding and belt conveying processes, and fine dust of particles is very easy to appear due to back-and-forth collision.
In patent CN201320187188.6, "a device for reducing the feeding dust in steelmaking of a converter", in order to solve the problem that alloy dust is scattered around and dispersed in air, a device for reducing the feeding dust in steelmaking of a converter is provided. The device comprises a converter dust removal system pipeline, an alloy high-level bin, an alloy blanking launder and an alloy swinging launder; an alloy dust removing pipeline is arranged between the dust removing system pipeline and the alloy blanking launder, an alloy dust removing fan is arranged in the alloy dust removing pipeline, and the alloy dust removing fan is started or stopped under the control of an alloy dust removing fan switch. When the dust is removed, the control box starts the alloy dust removing fan, the generated suction force pumps up dust in alloy lump materials in the alloy blanking launder, and the dust is sent into a converter dust removing system pipeline through the alloy dust removing pipeline. Under the action of inertia force, the speed of the dust is reduced after the dust moves in a pipeline of the converter dedusting system for a period of time, and the dust falls into the dust collecting box under the action of gravity force. The absorption force of the alloy dust removal fan is related to the feeding amount in unit time, the size and the amount of dust in the ferroalloy or alloy blocks; the cross section area ratio of the converter dust removal system pipeline to the alloy dust removal pipeline is 2:1, a suction ratio of 2:1, dust can conveniently enter a converter dust removal system pipeline from an alloy dust removal pipeline; the alloy dust removing pipeline is connected with the alloy blanking launder at or near the tail end of the alloy blanking launder; and after the charging is finished, the dust removing fan is stopped after 5-10 seconds of operation. The method can effectively prevent alloy dust from drifting around, can be widely used for adding alloy into a converter operation area of a ladle from a high-level alloy bin, but the scheme cannot prevent dust, and has the conventional measures that the alloy gathering part is plugged, but the plugging effect is poor, and the charging process is greatly influenced, so that the problems of alloy lump formation, difficult melting, low recovery rate and the like are caused, the molten steel components are easy to generate larger fluctuation, waste products are seriously caused, and the quality control is not facilitated.
Disclosure of Invention
In order to effectively influence on people by on-site dust emission, a converter charging collecting dust-proof device and a converter charging collecting dust-proof method are provided. The invention has simple manufacture, convenient operation and good use effect, and can greatly reduce dust emission in the surrounding environment and achieve better dust reducing effect by using the invention.
In order to achieve the aim, the invention provides a feeding, collecting and dust-insulating device which comprises an alloy collecting pipe 6, N air pipes 8 and annular air pipes 9,N which are more than or equal to 2;
the annular air pipe 9 is semi-encircling the top end of the alloy collecting pipe 6, N openings are uniformly formed in the lower end of the annular air pipe 9, and N is more than or equal to 2;
the air pipes 8 are evenly distributed on the upper half section of the alloy collecting pipe 6 in a surrounding mode, the upper openings of the air pipes 8 are connected to the openings of the corresponding annular air pipes 9, and the lower openings of the air pipes 8 are inserted into the alloy collecting pipe 6.
Preferably, the air duct 8 isHollow steel pipe with N being 4-8; the lower opening of the air pipe 8 is inserted into the alloy collecting pipe 6 obliquely downwards.
Preferably, the insertion length of the air pipe 8 is 8-12mm, the insertion opening is 0.5-2m away from the outlet end of the alloy collecting pipe 6, and the obliquely inserted bending sections are arc-shaped.
Preferably, the air circulating pipe 9 isThe hollow steel tube is welded with the alloy collecting pipe 6; one end of the annular air pipe 9 is connected with compressed air, and the other end of the annular air pipe is closed; the lower end of the circular air pipe 9 is uniformly opened for 4 to 8 +.>And is welded with the upper opening of the air pipe 8 in a seamless way. Preferably, the feeding, collecting and dust-insulating device further comprises a converter 1, a tapping hole 2, a ladle 3, molten steel 4 and an alloy chute 5.
The converter 1 is a general smelting container for iron and steel enterprises, the outer shell of the converter is made of steel, a refractory lining is built in the converter, and molten iron can be changed into molten steel through smelting.
The steel tapping hole 2 is a part of a converter body, the outer shell is made of steel, the integral refractory bricks are built in the steel, the steel tapping hole is cylindrical, and the steel tapping hole is a necessary passage for pouring out molten steel after qualified molten steel is smelted by the converter.
The steel ladle 3 is a container for containing molten steel, and the molten steel is poured out from the converter 1 through the steel tapping hole 2 and then is contained by the steel ladle, and the molten steel is operated to other smelting processes.
The molten steel 4 is the most main metal material of a steel mill, is a converter production product, is liquid high-temperature liquid, is usually at 1600-1700 ℃, and comprises various elements such as iron, carbon, silicon, manganese, sulfur, phosphorus and the like. After the converter is smelted, molten steel is poured into a ladle 3 from a tapping hole 2, a columnar steel flow is formed in the process, and the pouring point of the columnar steel flow moves along with the change of the inclination angle of the converter.
The alloy chute 5 is used for enabling alloy and auxiliary materials to enter the alloy collecting pipe 6 through the lower opening of the alloy chute 5. Is a necessary passage for various alloys and auxiliary materials. After various alloys and auxiliary materials are weighed, the materials enter the alloy collection through the lower opening of the alloy chute.
Preferably, the upper opening of the alloy collecting pipe 6 is arranged at the horizontal position on the ground and is used for enabling various alloys and auxiliary materials to enter the ladle, and the alloy collecting pipe 6 is a necessary passage for enabling various alloys and auxiliary materials to enter the ladle, is driven by a gear and can horizontally rotate, and the rotation angle is less than 150 degrees. The purpose of rotation is to ensure that the outlet end of the alloy is aligned with the steel flow in the ladle at any time, and various alloys and auxiliary materials enter the alloy collecting pipe 6 from the outlet end of the alloy chute 5 and then enter molten steel in the ladle from the outlet of the alloy collecting pipe 6. An operator can observe whether the outlet end is aligned with the steel flow or not from the upper opening end of the alloy collecting pipe 6, and can adjust the angle at any time.
The horizontal ground 7 is a standing position when an operator works, the upper opening of the alloy collecting pipe 6) is arranged at the horizontal position of the ground, and the operator can observe the alignment condition of the alloy collecting pipe and the steel flow conveniently.
The invention provides a feeding, summarizing and dust-insulating method of the device, which comprises the following steps:
step 1), the opening of the annular air pipe 9 is connected with compressed air for debugging, and N outlets of the annular air pipe 9 are connected to the lower opening of the air pipe 8, wherein N is more than or equal to 2;
step 2) tilting the converter 1 until the molten steel at the end point meets the tapping requirement, and turning down the tap hole 2 from a high position to open a compressed gas switch;
step 3) when molten steel 4 flows out of the steel tapping hole 2 into the steel ladle 3, rotating the alloy collecting pipe 6 to an angle, and aligning the outlet at the lower end of the alloy collecting pipe with the steel flow;
step 4) a charging switch is turned on, and alloy and auxiliary materials enter an alloy collecting pipe 6 from an alloy chute 5;
step 5) rotating downwards along with the converter 1, rotating downwards along with the tap hole 2, moving downwards along with the steel flow in the ladle 3, rotating the alloy collecting pipe 6, and aligning the outlet at the lower end with the steel flow;
after the alloy is added in the step 6), the compressed air flow is regulated to 300L/min-400L/min; the alloy collecting pipe (6) is rotated to adjust the compressed air flow to 100L/min-200L/min.
And 7) after tapping, closing the compressed air valve.
Preferably, in the step 2), the flow rate of the compressed gas is adjusted to 200L/min-300L/min.
Preferably, in the step 3), when the molten steel (4) flows out from the steel tapping hole 2 to the ladle 3 for 20s-30s, the alloy collecting pipe 6 is rotated for an angle; the flow rate of the compressed gas is adjusted to 800L/min-1000L/min.
Preferably, in the step 6), after the alloy is added, the flow rate of the compressed air is adjusted to 300L/min-400L/min; the alloy summary 6 is rotated to adjust the compressed air flow to 100L/min-200L/min.
Compared with the prior art, the invention has the advantages that:
the invention has the advantages of simple and easily obtained required materials, simple installation and operation, and provides the device for greatly reducing the dust emission and the use method thereof, thereby improving the dust prevention effect. The method can be applied to any steel plant and has the advantages of wide application range, high popularization value and the like.
Drawings
FIG. 1 is a schematic diagram of a feed summary dust insulation process of the present invention;
FIG. 2 is a schematic diagram of the feed summary details of the present invention;
reference numerals:
1. 2 parts of a converter, 2 parts of a tapping hole, 3 parts of a ladle, 4 parts of molten steel, 5 parts of an alloy chute, 6 parts of an alloy collecting pipe, 7 parts of a horizontal ground, 8 parts of an air pipe, 9 parts of an annular air pipe.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Taking a 120-ton top-bottom combined blown converter of a mountain steel group steel mill as an example, the following details of the embodiment of the present invention.
The invention provides a feeding, summarizing and dust-insulating device which comprises: as shown in fig. 1, the steel ladle comprises a converter 1, a steel tapping hole 2, a ladle 3, molten steel 4, an alloy chute 5, an alloy collecting pipe 6, a horizontal ground 7, an air pipe 8 and an annular air pipe 9.
The converter 1 is a general smelting container for iron and steel enterprises, the outer shell of the converter is made of steel, a refractory lining is built in the converter, and molten iron can be changed into molten steel through smelting.
The steel tapping hole 2 is a part of a converter body, the outer shell is made of steel, the integral refractory bricks are built in the steel, the steel tapping hole is cylindrical, and the steel tapping hole is a necessary passage for pouring out molten steel after qualified molten steel is smelted by the converter.
The steel ladle 3 is a container for containing molten steel, and the molten steel is poured out from the converter 1 through the steel tapping hole 2 and then is contained by the steel ladle, and the molten steel is operated to other smelting processes.
The molten steel 4 is the most main metal material of a steel mill, is a converter production product, is liquid high-temperature liquid, is usually at 1600-1700 ℃, and comprises various elements such as iron, carbon, silicon, manganese, sulfur, phosphorus and the like. After the converter is smelted, molten steel is poured into a ladle 3 from a tapping hole 2, a columnar steel flow is formed in the process, and the pouring point of the columnar steel flow moves along with the change of the inclination angle of the converter.
The alloy chute 5 is a necessary passage for various alloys and auxiliary materials. After various alloys and auxiliary materials are weighed, the materials enter the alloy collection through the lower opening of the alloy chute.
The alloy collecting pipe 6) is a necessary passage for various alloys and auxiliary materials to enter the steel ladle, and is driven by a gear, can horizontally rotate with a rotation angle smaller than 150 degrees, and the rotation aim is to ensure that the outlet end of the alloy collecting pipe is aligned with the steel flow in the steel ladle at any time, and various alloys and auxiliary materials enter the alloy collecting pipe 6 from the outlet end of the alloy chute 5 and then enter molten steel in the steel ladle from the outlet of the alloy collecting pipe 6. An operator can observe whether the outlet end is aligned with the steel flow or not from the upper opening end of the alloy collecting pipe 6, and can adjust the angle at any time.
The horizontal ground 7 is an operationThe operator is working in a standing position, the upper opening of the alloy collecting pipe 6) is arranged in a ground horizontal position, and meanwhile, the operator can observe the alignment condition of the alloy collecting pipe and steel flow conveniently. The feeding, collecting and dust-insulating device comprises N air pipes 8 and annular air pipes 9,N which are more than or equal to 2; the air pipes 8 are evenly distributed on the upper half section of the alloy collecting pipe 6 in a surrounding mode, the upper openings of the air pipes 8 are connected to the openings of the corresponding annular air pipes 9, and the lower openings of the air pipes 8 are inserted into the alloy collecting pipe 6. Preferably, the air duct 8 isHollow steel pipe with N being 4-8; the lower opening of the air pipe 8 is inserted into the alloy collecting pipe 6 obliquely downwards. The insertion length of the air pipe 8 is 8-12mm, the distance between the insertion opening and the outlet end of the alloy collecting pipe 6 is 0.5-2m, and the obliquely inserted bending sections are arc-shaped. Further preferably, the air duct 8 is +.>The hollow steel pipes are 6 in total and uniformly distributed and encircle the upper half section of the alloy collecting pipe 6, the upper openings of the hollow steel pipes are connected to the annular air pipe 9, the lower openings of the hollow steel pipes are obliquely downwards inserted into the alloy collecting pipe 6 by about 10mm, the insertion openings are 1m away from the outlet end part of the alloy collecting pipe 6, and the bending sections of the hollow steel pipes are arc-shaped so as to reduce wind resistance.
The annular air pipe 9 is semi-encircling the top end of the alloy collecting pipe 6, N openings are uniformly formed in the lower end of the annular air pipe 9, and N is more than or equal to 2; preferably, the air circulating pipe 9 isThe hollow steel tube is welded with the alloy collecting pipe 6; one end of the annular air pipe 9 is connected with compressed air, and the other end of the annular air pipe is closed; the lower end of the circular air pipe 9 is uniformly opened for 4 to 8 +.>And is welded with the upper opening of the air pipe 8 in a seamless way. Further preferably, the circular air pipe 9 is +.>Hollow bodyThe steel pipe is semi-looped at the top end of the alloy collecting pipe 6 and welded with the alloy collecting pipe 6; the lower end of the circular air pipe is uniformly opened by 6 +.>Is welded at the upper opening of the air pipe (8) in a seamless way; one end of the air pipe is connected with compressed air, the other end of the air pipe is airtight, and the air is ensured to flow into 6 air pipes from the opening end and flow into an alloy collecting pipe 6 from the lower opening of the air pipes. The flow meter is arranged at the compressed air valve connected with the valve, and the valve opening corresponding to different flows is set, so that the valve can be accurately regulated and controlled in actual operation.
The specific operation steps are as follows:
step 1), the opening of the annular air pipe 9 is connected with compressed air for debugging, and the air flow in the annular air pipe and the air flow in the air pipe are smooth through 6 outlets of the annular air pipe 9 to the lower opening of the air pipe 8;
and 2) tilting the converter when the converter 1 smelts to the end point and the molten steel meets the tapping requirement, and enabling the tapping hole (2) to rotate downwards from a high position. Opening a compressed gas switch to adjust the flow to 200L/min;
and 3) when the molten steel 4 flows out of the steel tapping hole 2 into the steel ladle 3 for about 30S, rotating the alloy summarizing (6) to an angle, aligning the outlet at the lower end of the alloy summarizing to the steel flow, and adjusting the flow rate of the compressed gas to 900L/min.
And 4) opening a charging switch, and enabling the alloy and auxiliary materials to enter an alloy collecting pipe 6 from an alloy chute 5.
Step 5) rotates downwards along with the converter 1, the steel tapping hole 2 rotates downwards along with the converter, the steel flow in the ladle 3 also moves downwards along with the converter, the alloy collecting pipe 6 rotates, and the lower end outlet is aligned with the steel flow at any time.
Step 6) adjusting the flow rate of the compressed air to 400L/min after the alloy is added; the alloy manifold 6 is turned to an angle that ensures that its lower outlet is far from the steel flow to the furthest end. The compressed air flow was adjusted to 100L/min.
And 7) after tapping, closing the compressed air valve.
The invention may be practiced without these specific details, using any knowledge known in the art.
The technical scheme of the invention solves the problem of alloy gathering dust, avoids the harm of dust to operators, and has convenient manufacture, simple operation and good use effect.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the appended claims.
Claims (9)
1. The feeding, collecting and dust-insulating method is realized based on a feeding, collecting and dust-insulating device and is characterized by comprising an alloy collecting pipe (6), N air pipes (8) and an annular air pipe (9), wherein N is more than or equal to 2;
the annular air pipe (9) is semi-encircling the top end of the alloy collecting pipe (6), N openings are uniformly formed in the lower end of the annular air pipe (9), and N is more than or equal to 2;
the air pipes (8) are uniformly distributed on the upper half section of the alloy collecting pipe (6) in a surrounding mode, the upper openings of the air pipes (8) are connected to the openings of the corresponding annular air pipes (9), and the lower openings of the air pipes (8) are inserted into the alloy collecting pipe (6);
the method comprises the following steps:
step 1), the opening end of the annular air pipe (9) is connected with compressed air for debugging, and N outlets of the annular air pipe (9) are connected to the lower opening of the air pipe (8), wherein N is more than or equal to 2;
step 2) tilting the converter (1) when the molten steel is smelted to the end point and meets the tapping requirement, and turning down the tapping hole (2) from a high position to open a compressed gas switch;
step 3) when the molten steel (4) flows out of the steel tapping hole (2) into the steel ladle (3), rotating the alloy collecting pipe (6) to an angle, and aligning the outlet at the lower end of the alloy collecting pipe with the steel flow;
step 4) a charging switch is turned on, and alloy and auxiliary materials enter an alloy collecting pipe (6) from an alloy chute (5);
step 5) rotating downwards along with the converter (1), rotating downwards along with the steel tapping hole (2), moving downwards along with the steel flow in the steel ladle (3), rotating the alloy collecting pipe (6), and aligning the outlet at the lower end with the steel flow;
after the alloy is added in the step 6), the compressed air flow is regulated to 300L/min-400L/min; rotating the angle of the alloy collecting pipe (6) to adjust the compressed air flow to 100L/min-200L/min;
and 7) after tapping, closing the compressed air valve.
2. The method for collecting and insulating dust according to claim 1, wherein the air duct (8) is8-12mm hollow steel pipe, N is more than or equal to 4 and less than or equal to 8; the lower opening of the air pipe (8) is obliquely downwards inserted into the alloy collecting pipe (6).
3. The method for collecting and dust-insulating materials according to claim 2, wherein the insertion length of the air pipe (8) is 8-12mm, the insertion opening is 0.5-2m away from the outlet end of the alloy collecting pipe (6), and the obliquely inserted bending sections are arc-shaped.
4. The method for collecting and insulating dust according to claim 1, wherein the circular air pipe (9) isThe hollow steel pipe with the diameter of 23-27mm is welded with the alloy collecting pipe (6); one end of the annular air pipe (9) is connected with compressed air, and the other end of the annular air pipe is airtight; the lower end of the annular air pipe (9) is uniformly opened for 4 to 8 +.>An opening of 8-12mm is welded with the upper opening of the air pipe (8) in a seamless way.
5. The method for collecting and insulating dust according to claim 1, wherein the device for collecting and insulating dust further comprises an alloy chute (5) for feeding the alloy and the auxiliary materials into the alloy collecting pipe (6) through a lower opening of the alloy chute (5).
6. The method for collecting and dust-proof materials according to claim 1, wherein the upper opening of the alloy collecting pipe (6) is arranged at the horizontal position on the ground for enabling various alloys and auxiliary materials to enter the ladle, and the alloy collecting pipe (6) is driven by a gear to horizontally rotate with the rotation angle less than 150 degrees.
7. The method for collecting and insulating dust in a material feed according to claim 1, wherein the flow rate of the compressed gas in the step 2) is adjusted to 200L/min-300L/min.
8. The method for collecting and dust-insulating materials according to claim 1, wherein in the step 3), when the molten steel (4) flows out of the steel tapping hole (2) to the ladle (3) for 20s-30s, the alloy collecting pipe (6) is rotated for an angle; the flow rate of the compressed gas is adjusted to 800L/min-1000L/min.
9. The method of claim 1, wherein in step 6), the compressed air flow is adjusted to 300L/min-400L/min after the alloy is added; the alloy collecting pipe (6) is rotated to adjust the compressed air flow to 100L/min-200L/min.
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| CN112958443A (en) * | 2021-03-17 | 2021-06-15 | 江西中烟工业有限责任公司 | Negative pressure type vibrating screen and screening material sorting and dust removing device |
| CN218507825U (en) * | 2022-09-30 | 2023-02-21 | 山东钢铁股份有限公司 | Reinforced dust insulation device that gathers |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4225033A (en) * | 1978-04-21 | 1980-09-30 | Hitachi Metals, Ltd. | Dustproof chute for particulate material loader |
| DE3225281C1 (en) * | 1982-07-06 | 1983-11-17 | Deutsche Kommunal-Anlagen Miete GmbH, 8000 München | Device for loading a furnace, in particular a rotary kiln, with material to be burned, in particular waste |
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| CN218507825U (en) * | 2022-09-30 | 2023-02-21 | 山东钢铁股份有限公司 | Reinforced dust insulation device that gathers |
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| CN115627316A (en) | 2023-01-20 |
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