CN114058764A - Rotary blowing device for molten iron desulphurization - Google Patents
Rotary blowing device for molten iron desulphurization Download PDFInfo
- Publication number
- CN114058764A CN114058764A CN202111361323.XA CN202111361323A CN114058764A CN 114058764 A CN114058764 A CN 114058764A CN 202111361323 A CN202111361323 A CN 202111361323A CN 114058764 A CN114058764 A CN 114058764A
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- CN
- China
- Prior art keywords
- molten iron
- rotary
- spray gun
- blowing device
- telescopic frame
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
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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
- 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
- C21C7/064—Dephosphorising; Desulfurising
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/168—Introducing a fluid jet or current into the charge through a lance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/168—Introducing a fluid jet or current into the charge through a lance
- F27D2003/169—Construction of the lance, e.g. lances for injecting particles
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention belongs to the field of ferrous metallurgy, and particularly relates to a rotary type injection device for molten iron desulphurization, which is characterized by comprising a support, a rotary table, a telescopic frame, a spray gun, a lifting driver and a rotary driving mechanism, wherein the support is a gantry-shaped frame body, the rotary table is arranged on the support in the middle, and the side edge of the rotary table is also connected with the support through the rotary driving mechanism; the lifting driver is connected to the top of the telescopic frame, and the telescopic frame is of a scissor fork structure; the spray gun is a zigzag tubular structure formed by hinging a plurality of sections of pipe bodies end to end, and is connected with the telescopic frame and can synchronously stretch under the driving of the lifting driver. Compared with the prior art, the invention has the beneficial effects that: 1) the material spraying holes are spatially distributed and rotate around the center of the molten iron tank under the driving of the rotary driving mechanism, so that the efficiency and effect of adjusting the components of the molten iron are ensured; 2) the foldable spray gun structure is adopted, the duty height of the spray gun is reduced, a top hoisting traction mechanism is omitted, and the overall height of the device is reduced.
Description
Technical Field
The invention belongs to the field of ferrous metallurgy, and particularly relates to a rotary blowing device for molten iron desulphurization.
Background
The pre-desulfurization of molten iron is one of the indispensable processes for optimizing the metallurgical production process, and can reduce the iron making of continuous casting steelCoke ratioAnd the production efficiency is improved, the lime consumption, the slag amount and the like of steel making are reduced, and the production cost is reduced. Molten iron entersMaking steelMolten iron pretreatment process for removing sulfur in molten iron before furnace smelting, also called molten iron furnaceDesulfurization of. ConventionalBlast furnaceContinuous steel casting/iron making-Converter steelmakingThe process is difficult to remove sulfur in the molten iron only inMaking steelAdding a molten iron pre-desulfurization procedure before the process, and adding the process after the steel makingExternal refiningThe process can produce high-quality low-sulfur steel. The patent application number is 201621358957.4's chinese utility model patent discloses a molten iron desulfurization is with rotatory jetting equipment, including rotary driving mechanism, walking dolly, channel-section steel track, location cylinder, channel-section steel track longitudinal fixation is on metal steel structural framework, and the walking dolly walks in the channel-section steel track through the walking wheel, and rotary driving mechanism's bearing frame and motor are fixed on the walking dolly, are provided with the cylinder at the walking dolly back, and the one end of cylinder is fixed on metal steel structural framework, other end butt joint walking dolly. The traveling trolley is connected with the lifting equipment through a chain to realize the up-and-down traveling in the channel steel rail, and the defect is that the structure needs double space height.
The invention discloses a rotary spray gun with the patent application number of 202010699178.5, which is a rotary spray gun for molten iron desulphurization and can skillfully combine a stirring method and a blowing method. The rotary spray gun comprises a central spray pipe and an outer sleeve, the central spray pipe is sleeved at the axial center of the outer sleeve in an axial direction, the rotary spray gun further comprises a scum stirring structure and a protective isolation structure, and the scum stirring structure is arranged at the middle upper part of the outer sleeve; the outer sleeve in the working process is separated from the high-temperature molten iron through the protective isolation structure, and the desulfurization scum floating above the molten iron liquid level is stirred and mixed with the molten iron at the liquid level position in the rotating process of the rotary spray gun through the scum stirring structure. The spray gun also has the problem of overhigh space height through the lifting of the central spray pipe relative to the outer sleeve.
Therefore, in the prior art, the lifting of the spray gun is mostly provided with lifting power by the hoisting mechanism, the duty height of the spray gun is far higher than that of the device, and the spatial arrangement of production equipment is greatly influenced; in addition, the blowing device is operated by a single gun, and a single-hole or multi-hole spray gun can be used for improving the dispersion effect of the powder, but the dispersion effect is negligible compared with the section size of the hot metal ladle.
Disclosure of Invention
The invention aims to provide a rotary type injection device for molten iron desulphurization, which overcomes the defects of the prior art, adopts a folding type spray gun lifting structure, reduces the duty height of the spray gun, utilizes the spatial three-dimensional distribution of a plurality of injection holes to rotate around the center of a molten iron tank under the driving of a rotary driving mechanism, and improves the efficiency and the effect of component adjustment in the refining process.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the rotary type blowing device for molten iron desulphurization is characterized by comprising a support, a rotary table, a telescopic frame, a spray gun, a lifting driver and a rotary driving mechanism, wherein the support is a gantry-shaped frame body; the lifting driver is connected to the top of the telescopic frame, and the telescopic frame is of a scissor fork structure; the spray gun is a zigzag tubular structure formed by hinging a plurality of sections of pipe bodies end to end, the spray gun is formed by steel pipes coated with refractory materials, and adjacent pipe bodies are hinged through short pipes; the spray gun is connected with the telescopic frame and can synchronously extend and retract under the driving of the lifting driver.
Further, the lifting driver is any one of a hydraulic cylinder, an air cylinder or an electric push rod.
Furthermore, the rotary driving mechanism comprises a large gear, a planetary reducer and a small gear, wherein the large gear is arranged on the periphery of the rotary table, the small gear is arranged on an output shaft of the planetary reducer, and the large gear is meshed with the small gear.
Furthermore, the short pipe is a refractory material prefabricated part with two tile-shaped split structures, the inner sides of the tile-shaped split structures are provided with protruding teeth matched with the grooves in the spray gun pipe body, the outer sides of the tile-shaped split structures are provided with flanges, flange holes are formed in the flanges, and the two tile-shaped split structures are connected through a refractory material prefabricated pin.
Furthermore, the telescopic frame comprises refractory material prefabricated rods and refractory material prefabricated pins, and two adjacent refractory material prefabricated rods are hinged through the refractory material prefabricated pins.
Furthermore, the top of the spray gun is communicated with the feeding hose through a connecting piece, and an electric control valve or a pneumatic control valve is arranged on the connecting piece.
Furthermore, the centre of the shear fork of the telescopic frame and the pipe body of the spray gun is connected through a fixing pin.
Furthermore, the pipe body and/or the short pipe are/is provided with material spraying holes in a distributed mode.
Furthermore, the refractory precast rod and the refractory precast pin are both corundum-spinel or corundum-silicon carbide precast members.
Compared with the prior art, the invention has the beneficial effects that: 1) the radiation area is enlarged by utilizing the spatial three-dimensional distribution of a plurality of material spraying holes, and the material spraying holes rotate around the center of the molten iron tank under the driving of a rotary driving mechanism, so that the efficiency and the effect of adjusting the components of the molten iron are ensured; 2) adopt foldable spray gun structure, reduce the fill height of spray gun, cancelled top hoist drive mechanism, reduce the whole height of device, provide convenience for the spatial arrangement of other production facility. 3) Through the extension degree of control expansion bracket, can realize spouting the regulation effect of material scope, can use as experimental facilities, reachs the contrast data of material scope and effect of spouting of difference.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the fitting structure of the pipe body and the short pipe of the lance in the embodiment of the present invention.
Fig. 3 is a schematic view of the hinge point structure of the telescopic frame in the embodiment of the invention.
In the figure: 1-support, 2-rotary table, 3-expansion bracket, 4-spray gun, 5-lifting driver, 6-rotary driving mechanism, 7-thrust bearing, 8-connecting piece, 9-feeding hose, 10-spraying hole, 11-hot metal tank, 31-refractory prefabricated rod, 32-refractory prefabricated pin, 41-pipe body, 42-short pipe, 421-tile-shaped split body, 422-projecting tooth, 423-flange, 61-big gear, 62-planetary reducer and 63-small gear.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples:
in the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-3, which are schematic structural views of an embodiment of a rotary blowing device for molten iron desulphurization according to the present invention, the rotary blowing device comprises a support 1, a turntable 2, a telescopic frame 3, a spray gun 4, a lifting driver 5 and a rotary driving mechanism 6, wherein the support 1 is a gantry frame body, the turntable 2 is centrally disposed on the support 1, the turntable 2 is connected with the support 1 through a thrust bearing 7, a side edge of the turntable 2 is further connected with the support 1 through the rotary driving mechanism 6, and the rotary driving mechanism 6 can enable the turntable 2 to rotate relative to the support 1; the lifting driver 5 is connected to the top of the telescopic frame 3, the telescopic frame 3 is of a scissor fork structure, the telescopic frame 3 comprises refractory prefabricated rods 31 and refractory prefabricated pins 32, and two adjacent refractory prefabricated rods 31 are hinged through the refractory prefabricated pins 32. The lifting driver 5 can be any one of a hydraulic cylinder, an air cylinder or an electric push rod, and can realize the extension and contraction of the telescopic frame 3 in the vertical direction and change the length. The scissor fork of the telescopic frame 3 is connected with the middle part of the pipe body 41 of the spray gun 4 through a fixing pin. The material spraying holes 10 are distributed on the pipe body 41 and/or the short pipe 42. The top of the spray gun 4 is communicated with a feeding hose 9 through a connecting piece 8, and an electric control valve or a pneumatic control valve is arranged on the connecting piece 8. The connecting piece 8 is a rotary sealing joint, and the sealing effect of the spray gun in the rotating process is guaranteed.
The rotary driving mechanism 6 comprises a large gear 61 arranged on the periphery of the rotary table 2, a planetary reducer 62 and a small gear 63 arranged on an output shaft of the planetary reducer 62, the large gear 61 is meshed with the small gear 63, the planetary reducer achieves first speed reduction, the large gear pair and the small gear pair achieve second speed reduction, and the rotary table 2 finally achieves rotation at the speed of 1-5 circles/minute.
The refractory preform rod and the refractory preform pin in the examples are both corundum-spinel or corundum-silicon carbide preforms having sufficient strength to allow casting of shaped preforms.
The operation steps of the rotary blowing device for molten iron desulphurization provided by the invention are as follows:
1) moving the hot metal ladle to the lower part of a bracket 1 of the device, starting a lifting driver 5, lowering a spray gun 2 into the hot metal ladle, stopping the lifting driver 5 when the distance between the lifting driver and the bottom of the hot metal ladle is 380-450 mm, and starting a rotary driving mechanism 6;
2) blowing nitrogen or inert gas with the purity of more than 99.9% and the pressure of 0.4-0.6 MPa into molten iron through a spray gun 4, wherein the rotating speed of a rotary table 2 is 3-5 r/min, continuously blowing the powder to be added into the molten iron, and the particle size of the powder is 0.075-0.15 mm until the reaction is finished;
3) stopping powder spraying supply, starting the lifting driver 5 to lift the spray gun 4 to the upper edge of the molten iron tank, and continuously supplying nitrogen or inert gas to the spray gun 4 for 15-60 seconds to clean the material spraying hole 10;
4) after the injection is completed, the hot metal ladle 11 is started to perform desulfurization operation on the next ladle of molten iron.
The steps can be suitable for various powder injection operations such as molten iron desulphurization, dephosphorization and the like, but not limited to a certain occasion, and the powder is prepared by selecting suitable materials according to the process requirements, such as CaO, CaCO3, CaF2 and other desulfurizing agents.
In order to further improve the desulfurization efficiency, a plurality of rotary blowing devices for molten iron refining can be continuously arranged along the track, so that the simultaneous operation of a plurality of tanks can be realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention.
Claims (9)
1. The rotary type blowing device for molten iron desulphurization is characterized by comprising a support, a rotary table, a telescopic frame, a spray gun, a lifting driver and a rotary driving mechanism, wherein the support is a gantry-shaped frame body; the lifting driver is connected to the top of the telescopic frame, and the telescopic frame is of a scissor fork structure; the spray gun is a zigzag tubular structure formed by hinging a plurality of sections of pipe bodies end to end, the spray gun is formed by steel pipes coated with refractory materials, and adjacent pipe bodies are hinged through short pipes; the spray gun is connected with the telescopic frame and can synchronously extend and retract under the driving of the lifting driver.
2. The rotary blowing device for molten iron desulfurization according to claim 1, wherein the elevating driver is any one of a hydraulic cylinder, an air cylinder, or an electric push rod.
3. The rotary blowing device according to claim 1, wherein the rotary driving mechanism includes a large gear provided on an outer periphery of the turntable, a planetary reduction gear, and a small gear provided on an output shaft of the planetary reduction gear, and the large gear is engaged with the small gear.
4. The rotary blowing device for molten iron desulphurization according to claim 1, wherein the short pipe is two prefabricated refractory materials with tile-shaped split structure, the inner side of the tile-shaped split body is provided with a protruding tooth matched with the groove on the spray gun tube body, the outer side of the tile-shaped split body is provided with a flange, the flange is provided with a flange hole, and the two tile-shaped split bodies are connected through a prefabricated refractory material pin.
5. The rotary blowing device for desulfurizing molten iron of claim 1, wherein the expansion bracket comprises a refractory preform rod and a refractory preform pin, and two adjacent refractory preform rods are hinged by the refractory preform pin.
6. The rotary blowing device for molten iron desulphurization according to claim 1, characterized in that the top of the lance is communicated with the feed hose through a connector, and an electric control valve or a pneumatic control valve is arranged on the connector.
7. The rotary blowing device for desulfurizing molten iron of claim 1, wherein the scissor fork of the telescopic frame is connected to a center of the body of the lance by a fixing pin.
8. The rotary blowing device for desulfurizing molten iron of claim 1, wherein the nozzle body and/or the short pipe are provided with a plurality of nozzle holes.
9. The rotary blowing device for desulfurizing molten iron according to claim 5, wherein the refractory preform rod and the refractory preform pin are both corundum-spinel or corundum-silicon carbide material preforms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111361323.XA CN114058764A (en) | 2021-11-17 | 2021-11-17 | Rotary blowing device for molten iron desulphurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111361323.XA CN114058764A (en) | 2021-11-17 | 2021-11-17 | Rotary blowing device for molten iron desulphurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114058764A true CN114058764A (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111361323.XA Withdrawn CN114058764A (en) | 2021-11-17 | 2021-11-17 | Rotary blowing device for molten iron desulphurization |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106987684A (en) * | 2017-05-12 | 2017-07-28 | 山东钢铁股份有限公司 | A kind of desulfuring spray gun |
| US20170362672A1 (en) * | 2016-06-15 | 2017-12-21 | Larry J. Epps | Multiple chamber material-stirring lance and method |
| CN207563154U (en) * | 2017-12-05 | 2018-07-03 | 浙江嘉宝铝业有限公司 | A kind of spray equipment of aluminium alloy extrusions |
| CN209227011U (en) * | 2018-11-09 | 2019-08-09 | 五矿营口中板有限责任公司 | A kind of composite blowing molten iron pre-desulfurization device |
| CN110396572A (en) * | 2019-07-30 | 2019-11-01 | 钢铁研究总院 | A kind of the dephosphorization of molten iron device and dephosphorization method of smelting stainless steel |
| CN212321733U (en) * | 2020-04-17 | 2021-01-08 | 中国兵器工业火炸药工程与安全技术研究院 | Automatic detection device for saturated electrostatic charge quantity in vacuum conveying of energetic material |
| CN113649181A (en) * | 2021-09-01 | 2021-11-16 | 贵州盘江煤电集团技术研究院有限公司 | Long-distance liquid pressure spraying device used in underground and using method thereof |
-
2021
- 2021-11-17 CN CN202111361323.XA patent/CN114058764A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170362672A1 (en) * | 2016-06-15 | 2017-12-21 | Larry J. Epps | Multiple chamber material-stirring lance and method |
| CN106987684A (en) * | 2017-05-12 | 2017-07-28 | 山东钢铁股份有限公司 | A kind of desulfuring spray gun |
| CN207563154U (en) * | 2017-12-05 | 2018-07-03 | 浙江嘉宝铝业有限公司 | A kind of spray equipment of aluminium alloy extrusions |
| CN209227011U (en) * | 2018-11-09 | 2019-08-09 | 五矿营口中板有限责任公司 | A kind of composite blowing molten iron pre-desulfurization device |
| CN110396572A (en) * | 2019-07-30 | 2019-11-01 | 钢铁研究总院 | A kind of the dephosphorization of molten iron device and dephosphorization method of smelting stainless steel |
| CN212321733U (en) * | 2020-04-17 | 2021-01-08 | 中国兵器工业火炸药工程与安全技术研究院 | Automatic detection device for saturated electrostatic charge quantity in vacuum conveying of energetic material |
| CN113649181A (en) * | 2021-09-01 | 2021-11-16 | 贵州盘江煤电集团技术研究院有限公司 | Long-distance liquid pressure spraying device used in underground and using method thereof |
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Application publication date: 20220218 |
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