CN110317914B - Blast furnace top distributing device for fixed-point feeding of scrap steel - Google Patents
Blast furnace top distributing device for fixed-point feeding of scrap steel Download PDFInfo
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- CN110317914B CN110317914B CN201910674640.3A CN201910674640A CN110317914B CN 110317914 B CN110317914 B CN 110317914B CN 201910674640 A CN201910674640 A CN 201910674640A CN 110317914 B CN110317914 B CN 110317914B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/18—Bell-and-hopper arrangements
- C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
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Abstract
The invention relates to a blast furnace top distributing device for fixed-point feeding of scrap steel, which comprises a distributing device shell arranged at the top of a furnace throat, wherein a feeding hole is formed in the upper part in the distributing device shell, a rotary support is arranged on the inner wall of the distributing device shell at the lower end of the feeding hole, the outer side of the rotary support is connected with a rotary support rotating motor through a gear, a long-strip-structured rotating body is arranged in the rotary support along the radial direction, a receiving support is arranged at the lower rotating end, and a chute device is connected below the receiving support; the chute device comprises a main chute which is rotatably connected with the inner side of the rotating body and an auxiliary chute which is connected with the bottom of the upper end of the main chute, the main chute part which is butted with the auxiliary chute is a material distribution area, the material distribution area is provided with convex edges along the longitudinal direction, and a plurality of meshes are uniformly arranged between every two adjacent convex edges; the upper end of the main chute is just arranged at the lower end of the feed inlet. The distributor has good effect of feeding raw fuel into the furnace according to the classification and quality, and is flexible and simple to operate.
Description
Technical Field
The invention belongs to the technical field of metallurgical industry, and particularly relates to a blast furnace top distributing device for fixed-point feeding of scrap steel.
Background
There are two main sources of iron-containing raw materials for the steel industry: firstly, ore and secondly, scrap steel; the former is a natural resource, and the latter is a recycled renewable resource; the scrap steel is mainly used as a steel-making additive in a long-process converter or a steel-making main material of a short-process electric furnace; the waste steel is taken as the steelmaking raw material, so that the processes of sintering, coking, ironmaking and other iron pre-processes are omitted, the energy consumption and the pollution discharge are reduced, and the social accumulated waste steel resources are consumed; at present, with the increase of domestic waste steel sources and the great reduction of prices, the production cost can be greatly reduced by using the waste steel as a raw material to carry out blast furnace smelting. In the process of smelting scrap steel, charging materials are loaded into a furnace from the top of a blast furnace, and a distributor is the most key part of the top of the furnace and directly operates under the working conditions of high temperature of top gas, large dust content, large pressure fluctuation and strong corrosivity. The existing distributing device mainly realizes various distributing forms of the chute through two movements, namely the rotation movement of the chute around the central line of the distributing device and the tilting movement of the chute around the suspension trunnion. This type of distributor transmission system tends to introduce a large amount of small-particle-size raw fuel into the central region of the blast furnace and gradually into the dead column as the charge descends, and the particle size of the raw fuel in this central region becomes smaller as the smelting process proceeds, thereby further deteriorating the permeability of the dead column. For scrap and ore, the small particle size is concentrated in a certain zone or a certain number of zones due to segregation phenomena, sometimes even along with the collapse of raw fuel into the center of the blast furnace or even the central area, so that fluidization and airflow turbulence appear in local areas, and the airflow in certain areas is weak or even no airflow, which is very unfavorable for scrap reduction.
Therefore, aiming at the existing distributing system, the invention provides the blast furnace top distributing device for the fixed-point feeding of the scrap steel, and the raw fuels with different granularities are loaded at different positions in the radial direction of the blast furnace through the adjustment of the distributing device, thereby solving the problems.
Disclosure of Invention
In order to solve the technical problem, the invention provides the blast furnace top distributing device for the fixed-point feeding of the scrap steel, which has good effect of grading and grading raw fuels such as the scrap steel, ore and the like into the furnace and is flexible and simple to operate.
In order to achieve the purpose, the invention provides a blast furnace top distributing device for fixed-point feeding of scrap steel, which comprises a distributing device shell arranged at the top of a furnace throat, wherein a feeding hole is formed in the upper part in the distributing device shell, a rotary support is arranged on the inner wall of the distributing device shell at the lower end of the feeding hole, the outer side of the rotary support is connected with a rotary support rotating motor through a gear, a rotating body with a long strip structure is arranged on the inner side of the rotary support along the radial direction, a supporting bracket is arranged at the lower end of the rotation, and a chute device is connected below the supporting bracket; the chute device comprises a main chute and an auxiliary chute, the main chute is rotatably connected with the inner side of the rotating body, the auxiliary chute is connected with the bottom of the upper end of the main chute, the main chute abutting against the auxiliary chute is a distribution area, the distribution area is provided with convex edges along the longitudinal direction, and a plurality of meshes are uniformly arranged between every two adjacent convex edges; the upper end of the main sliding groove is just arranged at the lower end of the feeding hole, and an included angle not smaller than 30 degrees is formed between the main sliding groove and the auxiliary sliding groove.
Furthermore, the mesh structure butted at the auxiliary sliding groove position on the main sliding groove is arranged below the feeding point of the main sliding groove.
The cross section of the convex edges is of an arc structure, the height of the convex edges is 20-35mm, and the distance between the convex edges is not less than 20 mm.
Furthermore, the main sliding groove part corresponding to the upper end position of the convex edge and the main sliding groove part corresponding to the upper end position of the mesh are respectively provided with a transverse convex rib, and the height of each convex rib is 5-15 mm.
The bottom of the material distribution area is also provided with a net blocking mechanism, the net blocking mechanism comprises a net body with meshes overlapped with the meshes of the material distribution area, a screw nut arranged on one side of the net body and a screw fixed at the bottom of the material distribution area through a bearing, the other end of the screw is connected to the bottom of the upper end of the main chute through a bracket, the screw can rotate on the bearing, and the screw can drive the screw nut to move through the rotation of the screw;
the other side of the net body is provided with a sliding sleeve and a sliding rod fixed at the bottom of the material distribution area through a fixing frame, the other end of the sliding rod is connected to the bottom of the upper end of the main sliding groove through a support, and the sliding rod is driven by the net body, and the sliding sleeve slides on the sliding rod.
Furthermore, a hand-held operation end is arranged at the end part of the screw rod corresponding to the support end.
Furthermore, the rotating body is of a strip-shaped annular structure, a concave joint is arranged at one end of the bearing support, an adjusting through hole is formed in the concave joint, the concave joint is inserted into the ring body of the rotating body from the bottom and is screwed to the adjusting through hole through a screw assembly for fixing; the other end of the bearing support is connected to the inner side of the distributing device shell through an air cylinder telescopic device, and when the air cylinder telescopic device extends, the bearing support rotates by taking a screw rod part pivoted with the rotating body as a fulcrum.
Furthermore, the inner side of the adjusting through hole is of a gear structure, the screw assembly is composed of four gears sleeved on the rod body, the four gears are respectively a side gear which is arranged on two sides in the adjusting through hole and meshed with the gears of the adjusting through hole, and a pinion which is arranged in the middle of the two side gears and meshed with the gears of the two side gears, and the two pinions are also respectively meshed with the side gears of the opposite side.
Furthermore, side rails are arranged on the side edges of the main sliding groove, the top of the auxiliary sliding groove is fixedly connected to a U-shaped supporting frame, the open end of the U-shaped supporting frame is connected with the auxiliary sliding groove and is provided with a second adjusting through hole, and the open end of the U-shaped supporting frame is inserted into the outer sides of the side rails on the two sides of the main sliding groove and is screwed to the second adjusting through hole through a screw rod for fixing; the other end of the U-shaped bearing frame is connected with the rotating body through a second cylinder telescopic device, and when the second cylinder telescopic device extends, the U-shaped bearing frame rotates by taking a screw rod part pivoted with the side rail as a fulcrum.
The blast furnace top distributing device for the fixed-point charging of the scrap steel distributes the small-granularity raw fuel in the peripheral area of the blast furnace as much as possible through the auxiliary chute, so that the poor air permeability of the central dead charge column caused by the excessive small-granularity raw fuel is avoided. In addition, the angle of the main sliding chute and the auxiliary sliding chute can be adjusted, so that the swinging mode of the sliding chutes is diversified, and various modes of material distribution are better realized.
Drawings
FIG. 1 is a schematic structural view of one embodiment of the blast furnace top distributor for the fixed point charging of scrap steel according to the present invention;
FIG. 2 is a schematic structural view of one embodiment of a primary chute;
FIG. 3 is a schematic structural view of another embodiment of the main chute;
FIG. 4 is a schematic structural view of one embodiment of a primary chute and a secondary chute;
FIG. 5 is a schematic view of the main chute with the distribution area and the mesh body overlapping;
FIG. 6 is a schematic structural view of another embodiment of the blast furnace top distributor for the fixed point charging of scrap steel according to the present invention;
FIG. 7 is a schematic view of the angle adjustment of the main and auxiliary chutes of the present invention
FIG. 8 is a schematic structural diagram of an embodiment of an adjustment via according to the present invention.
Reference numerals
In the figure: 1-distributing device shell; 10-a feed inlet; 11-a slewing bearing; 110-a slewing bearing motor; 12-a rotator; 13-main chute; 14-auxiliary chute; 15-a material distribution area; 16-ribs; 17-mesh; 18-a rib; 20-a mesh body; 21-screw nut; 22-a bearing; 23-a screw; 24-a handheld operation end; 120-a receiving support; 121-female connector; 122-adjusting the through hole; 126-screw assembly; 127-side gear; 128-pinion gear; 130-side rail; 144-U-shaped carrier; 145 — a second adjustment via; 4-cylinder telescoping device; 42-second cylinder telescopic device.
Detailed Description
The specific embodiment of the top distributor for blast furnace of the present invention for feeding scrap at a fixed point will be further described with reference to the following examples. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby; various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the invention, and all equivalent technical solutions also fall within the scope of the invention, which is defined by the claims.
Examples
Fig. 1 shows an embodiment of the invention of a blast furnace top distributor for the fixed-point feeding of scrap steel.
The blast furnace top distributing device comprises a distributing device shell 1 arranged at the top of a furnace throat, wherein a feed inlet 10 is arranged at the upper part in the distributing device shell 1, a rotary support 11 is arranged on the inner wall of the distributing device shell 1 at the lower end of the feed inlet 10, the outer side of the rotary support 11 is connected with a rotary support rotating motor 110 through a gear, a rotating body 12 with a long strip structure is arranged at the inner side of the rotary support 11 along the radial direction, a supporting bracket 120 is arranged at the lower end of the rotating body 12, and a chute device is connected below the supporting bracket 120; the chute device comprises a main chute 13 rotatably connected with the inner side of the rotating body 12 and an auxiliary chute 14 connected with the bottom of the upper end of the main chute 13, the part of the main chute 13 butted at the position of the auxiliary chute 14 is a material distribution area 15, the material distribution area 15 is provided with convex ribs 16 along the longitudinal direction, and a plurality of meshes 17 are uniformly arranged between the adjacent convex ribs 16, as shown in fig. 2; the upper end of the main chute 13 is just arranged at the lower end of the feed port 10, and an included angle of not less than 30 degrees is formed between the main chute 13 and the auxiliary chute 14.
The main chute can filter the steel scraps and ores with small particle size removed through the auxiliary chutes, the raw fuel of the main chute falls to the center and the secondary center area, and the raw fuel with small particle size of the auxiliary chutes can be discharged to the peripheral area, so that the air permeability of the center area is ensured. On the other hand, the raw fuel is prevented from being clamped on the meshes, and the convex edges are arranged on the material distribution area, so that the raw fuel with larger granularity is kept out of the meshes.
Further, in order to avoid direct collision of falling raw fuel on meshes and cause mesh blockage, the main chute 13 is butted with a mesh structure at the position of the auxiliary chute 14 and is arranged below a feeding point of the auxiliary chute.
The cross section of the convex ribs 16 is of an arc structure, the height of the convex ribs 16 is 20-35mm, and the distance between the convex ribs 16 is not less than 20 mm. The circular arc-shaped convex edges are arranged, so that the raw fuel is not easy to clamp on the meshes and falls smoothly.
As shown in fig. 3, the main chute 13 slot portion corresponding to the upper end position of the rib 16 and the main chute 16 slot portion corresponding to the upper end position of the mesh 17 are both provided with a transverse rib 18, and the height of the rib 18 is 5-15 mm. The setting of protruding muscle can further avoid less granularity to the jam of mesh, reduces the former fuel of small-size simultaneously and gets into supplementary spout, reduces the piling up of the former fuel area of small-size of supplementary spout guide, guarantees the air permeability in the whole stove.
In some examples, as shown in fig. 4, a net blocking mechanism is further disposed at the bottom of the material separating area 15, the net blocking mechanism includes a net body 20 having a mesh overlapping with the mesh 17 of the material separating area 15, a screw nut 21 disposed at one side of the net body 20, and a screw 23 fixed at the bottom of the material separating area 15 through a bearing 22, the other end of the screw 23 is connected to the bottom of the upper end of the main chute 13 through a bracket, the screw 23 is rotatable on the bearing 22, and the screw 23 is rotatable to drive the screw nut 21 to move. Fig. 5 shows the condition when the meshes of the net body are overlapped with the meshes of the material distribution area, when the sizes of the meshes need to be adjusted, the meshes of the material distribution area can be shielded through the movement of the net body, and the blanking meshes are reduced.
In a specific embodiment, the other side of the net body 20 is provided with a sliding sleeve and a sliding rod fixed at the bottom of the material distribution area 15 through a fixing frame, the other end of the sliding rod is connected to the bottom of the upper end of the main chute 13 through a bracket, and the sliding sleeve of the sliding rod slides on the sliding rod under the driving of the net body 20.
The end of the screw 23 corresponding to the holder end is provided with a hand-held operating end 24. When the mesh size needs to be adjusted, the mesh body is moved through the operation end to shield the mesh.
Fig. 6-7 are schematic views showing another embodiment of the blast furnace top distributor for fixed-point charging of scrap steel according to the present invention, wherein the rotating body 12 is a strip-shaped annular structure, one end of the receiving bracket 120 is provided with a female connector 121, the female connector 121 is provided with an adjusting through hole 122, the female connector 121 is inserted into the ring body of the rotating body 12 from below and is fixed by a screw assembly 126 screwed into the adjusting through hole 122; the other end of the receiving support 120 is connected to the inner side of the distributing device shell 1 through an air cylinder telescopic device 4, when the air cylinder telescopic device 4 extends, the piston rod moves downwards, and the receiving support 120 rotates by taking a screw part pivoted with the rotating body 12 as a fulcrum, so that the angle adjustment of the main chute is realized. The invention reduces the complexity of the multi-toothed wheel structure for adjusting the chute angle by adjusting the telescopic rod and simplifies the mechanical structure.
As shown in fig. 8, the inner side of the adjusting through hole 122 is a gear structure, the screw assembly 126 is composed of four gears sleeved on the rod body, which are respectively a side gear 127 disposed at two sides in the adjusting through hole 122 and engaged with the gear thereof, and a pinion 128 disposed at the middle of the two side gears 127 and engaged with the side gear 127 at the opposite side, and the two pinions 128 are also respectively engaged with the side gear 127 at the opposite side. When the cylinder expansion device 4 extends, the rotary fulcrum on the other side moves up the concave joint through the gear assembly to adapt to the deformation caused by the extension of the cylinder expansion device, and in the application process, the length of the adjusting through hole is specifically set, so that the main sliding groove can be adjusted by an angle of 45 degrees within the adjusting range.
In some examples, as shown in fig. 6 to 7, the side of the main sliding chute 13 is provided with a side rail 130, the top of the auxiliary sliding chute 14 is fixedly connected to a U-shaped receiving frame 144, the open end of the U-shaped receiving frame 144 is connected to the auxiliary sliding chute 14 and is provided with a second adjusting through hole 145, and the open end of the U-shaped receiving frame 144 is inserted into the outer side of the side rail 130 at both sides of the main sliding chute 13 and is fixed by screwing to the second adjusting through hole 145; the other end of the U-shaped receiving frame 144 is connected to the rotating body 12 through a second cylinder extension device 42, and when the second cylinder extension device 42 extends, the U-shaped receiving frame 144 rotates with a screw portion pivotally connected to the side rail 130 as a fulcrum. It should be noted that the screw structure can also be configured as the structure of the screw assembly 126, which is not described herein too much.
It should be noted that, in this document, the term "comprises/comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or apparatus that comprises a list of elements does not include only those elements but also other elements not expressly listed or inherent to such process, method, article or apparatus.
The preferred embodiments and examples of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments and examples described above, and various changes can be made within the knowledge of those skilled in the art without departing from the concept of the present invention.
Claims (9)
1. The blast furnace top distributing device for fixed-point feeding of the scrap steel comprises a distributing device shell (1) arranged at the top of a furnace throat, and is characterized in that a feeding hole (10) is formed in the upper portion of the distributing device shell (1), a rotary support (11) is arranged on the inner wall of the distributing device shell (1) at the lower end of the feeding hole (10), the outer side of the rotary support (11) is connected with a rotary support rotating motor (110) through a gear, a rotating body (12) with a long strip structure is arranged on the inner side of the rotary support (11) along the radial direction, a supporting bracket (120) is arranged at the lower end of the rotating body (12), and a chute device is connected below the supporting bracket (; the chute device comprises a main chute (13) which is rotatably connected with the inner side of the rotating body (12) and an auxiliary chute (14) which is connected with the bottom of the upper end of the main chute (13), the part of the main chute (13) which is butted with the auxiliary chute (14) is a material distribution area (15), the material distribution area (15) is provided with convex ribs (16) along the longitudinal direction, and a plurality of meshes (17) are uniformly arranged between the adjacent convex ribs (16); the upper end of the main sliding groove (13) is just arranged at the lower end of the feeding hole (10), and an included angle of not less than 30 degrees is formed between the main sliding groove (13) and the auxiliary sliding groove (14).
2. The blast furnace top distributor for the fixed point charging of scrap steel according to claim 1, characterized in that the mesh structure of the main chute (13) abutting at the position of the auxiliary chute (14) is arranged below the feeding point thereof.
3. The blast furnace top distributor for the spot charging of scrap steel according to claim 1, characterized in that said ribs (16) have a circular arc configuration in cross section, said ribs (16) having a height of 20-35mm, the distance between said ribs (16) being not less than 20 mm.
4. The blast furnace top distributor for the fixed point charging of scrap steel according to claim 3, wherein the grooves of the main chutes (13) corresponding to the upper ends of said ribs (16) and the grooves of the main chutes (13) corresponding to the upper ends of said meshes (17) are provided with ribs (18) arranged transversely, and the height of said ribs (18) is 5-15 mm.
5. The blast furnace top distributing device for the fixed-point feeding of the scrap steel according to claim 1, wherein the bottom of the distributing area (15) is further provided with a screen blocking mechanism, the screen blocking mechanism comprises a net body (20) with meshes overlapped with the meshes (17) of the distributing area (15), a screw nut (21) arranged on one side of the net body (20), and a screw rod (23) fixed at the bottom of the distributing area (15) through a bearing (22), the other end of the screw rod (23) is connected to the bottom of the upper end of the main chute (13) through a bracket, the screw rod (23) can rotate on the bearing (22), and the screw rod (23) can rotate to drive the screw nut (21) to move;
the other side of the net body (20) is provided with a sliding sleeve and a sliding rod fixed at the bottom of the material distribution area (15) through a fixing frame, the other end of the sliding rod is connected to the bottom of the upper end of the main sliding groove (13) through a support, and the sliding rod is driven by the net body (20) to slide on the sliding rod through the sliding sleeve.
6. The blast furnace top distributor for the fixed point feeding of scrap steel according to claim 5, characterized in that the end of the screw (23) corresponding to one end of the receiving bracket is provided with a hand-held operating end (24).
7. The blast furnace top distributor for the fixed-point charging of scrap steel according to claim 1, wherein said rotating body (12) is of a strip-shaped annular configuration, one end of said receiving bracket (120) is provided with a female connector (121), said female connector (121) is provided with an adjusting through hole (122), said female connector (121) is inserted from below into the ring body of said rotating body (12) and is fixed by a screw assembly (126) screwed into said adjusting through hole (122); the other end of the bearing support (120) is connected to the inner side of the distributing device shell (1) through an air cylinder telescopic device (4), and when the air cylinder telescopic device (4) extends, the bearing support (120) rotates by taking a screw rod part pivoted with the rotating body (12) as a fulcrum.
8. The blast furnace top distributor for the fixed point charging of scrap steel according to claim 7, wherein the inside of the adjusting through hole (122) is of a gear structure, the screw assembly (126) is composed of four gears sleeved on the rod body, which are respectively a side gear (127) arranged at two sides inside the adjusting through hole (122) and meshed with the gears thereof, and a pinion (128) arranged at the middle part of the two side gears (127) and meshed with the side gear (127) at the opposite side, and the two pinions (128) are also respectively meshed with the side gears (127) at the opposite side.
9. The blast furnace top distributor for the fixed-point charging of scrap steel according to claim 1, wherein the side of the main chute (13) is provided with a side rail (130), the top of the auxiliary chute (14) is fixedly connected to a U-shaped receiving frame (144), the open end of the U-shaped receiving frame (144) is connected with the auxiliary chute (14) and is provided with a second adjusting through hole (145), and the open end of the U-shaped receiving frame (144) is inserted into the outer sides of the side rails (130) at both sides of the main chute (13) and is fixed by screwing a screw to the second adjusting through hole (145); the other end of the U-shaped bearing frame (144) is connected to the rotating body (12) through a second air cylinder telescopic device (42), and when the second air cylinder telescopic device (42) extends, the U-shaped bearing frame (144) rotates by taking a screw rod part pivoted with the side rail (130) as a fulcrum.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910674640.3A CN110317914B (en) | 2019-07-25 | 2019-07-25 | Blast furnace top distributing device for fixed-point feeding of scrap steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910674640.3A CN110317914B (en) | 2019-07-25 | 2019-07-25 | Blast furnace top distributing device for fixed-point feeding of scrap steel |
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| CN110317914B true CN110317914B (en) | 2021-01-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111074030B (en) * | 2020-01-17 | 2021-05-07 | 北京科技大学 | Blast furnace material distribution system and method |
| CN111074031B (en) * | 2020-01-17 | 2021-05-07 | 北京科技大学 | Blast furnace distributing system with multiple storage devices for distributing materials simultaneously |
| CN115109875B (en) * | 2021-03-19 | 2024-01-05 | 上海梅山钢铁股份有限公司 | Control method for adding scrap steel into blast furnace |
| CN114921601B (en) * | 2022-07-22 | 2022-09-30 | 徐州永冠铸业有限公司 | Scrap steel adding device for smelting molten iron |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1014995B (en) * | 1988-04-01 | 1991-12-04 | 北京科技大学 | Multi-ring loading chute and method of controlling feed distribution |
| CN2795222Y (en) * | 2005-04-22 | 2006-07-12 | 刘起 | Slide chute of blast furnace |
| JP5410065B2 (en) * | 2008-10-20 | 2014-02-05 | 日鉄住金ハード株式会社 | Transport structure |
| BRPI1010065B1 (en) * | 2009-10-09 | 2017-10-31 | Nippon Steel & Sumikin Engineering Co., Ltd. | LOADING DEVICE |
| KR20140140343A (en) * | 2013-05-29 | 2014-12-09 | 주식회사 포스코 | Distribution apparatus and material processing apparatus having the same |
| CN106702060B (en) * | 2016-12-01 | 2019-03-15 | 北京科技大学 | A kind of blast furnace material flow track measuring device and measuring method based on radar |
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