CN114772215B - Pneumatic sand adding system and sand adding method for electric furnace - Google Patents
Pneumatic sand adding system and sand adding method for electric furnace Download PDFInfo
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- CN114772215B CN114772215B CN202210510499.5A CN202210510499A CN114772215B CN 114772215 B CN114772215 B CN 114772215B CN 202210510499 A CN202210510499 A CN 202210510499A CN 114772215 B CN114772215 B CN 114772215B
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- sand adding
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- hopper
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- 239000004576 sand Substances 0.000 title claims abstract description 170
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 57
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 12
- 238000010079 rubber tapping Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 abstract description 10
- 238000010891 electric arc Methods 0.000 abstract description 6
- 230000033764 rhythmic process Effects 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/02—Devices for feeding articles or materials to conveyors
- B65G47/16—Devices for feeding articles or materials to conveyors for feeding materials in bulk
- B65G47/18—Arrangements or applications of hoppers or chutes
- B65G47/19—Arrangements or applications of hoppers or chutes having means for controlling material flow, e.g. to prevent overloading
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/06—Gas pressure systems operating without fluidisation of the materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/50—Pneumatic devices
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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
- F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/045—Sand, soil and mineral ore
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- 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
Abstract
The invention discloses an electric furnace pneumatic sand adding system and a sand adding method, wherein the sand adding system comprises a raw material bin, an electric furnace, a material receiving bin higher than the electric furnace, and a multi-degree-of-freedom hook device arranged above a sand adding port of an upper furnace shell of the electric furnace, wherein a self-locking sand adding hopper is hung on the multi-degree-of-freedom hook device; the outlet of the raw material bin is connected with a pneumatic conveying mechanism, the pneumatic conveying mechanism is connected with the receiving bin through a conveying pipe, and the outlet of the receiving bin is connected with the self-locking sand adding hopper through a hose. The invention mainly solves the problems of high labor intensity, low safety, low operation efficiency, special requirements on the drop point of the drainage sand, waste of the drainage sand materials and the like of the electric arc furnace drainage sand filling in the prior art, effectively reduces the labor intensity of post workers, improves the operation safety and the operation efficiency, improves the smelting rhythm of an electric furnace, ensures the sand adding success rate and reduces the waste of the drainage sand materials.
Description
Technical Field
The invention belongs to the technical field of electric arc furnace smelting, and particularly relates to an electric furnace pneumatic sand feeding system and a sand feeding method.
Background
In the field of electric arc furnace smelting, the steel of the electric furnace is filled with the diversion sand of the tap hole every time the electric furnace finishes smelting, the operation mode of the electric furnace generally needs to manually convey the diversion sand to a sand adding area, then the operation is performed manually, the operation time is longer, the filling quantity of the diversion sand is not easy to control, the smelting rhythm and the efficiency of the electric arc furnace are affected, the labor intensity of the diversion sand filling operation is high, and in addition, the field environment is high in temperature and dust, so that the electric arc furnace is not beneficial to the occupational health of post personnel. In addition, if the smelting process has the requirement of steel remaining, the electric furnace is required to be used for adding sand at a horizontal position, so that the requirement on sand adding is higher, and manual safety confirmation is required, so that the difficulty and risk of sand adding are increased.
Through retrieving, CN208261844U discloses a steel-tapping hole sand adding device, and it includes the support and sets up drainage sand storage device on the support, and drainage sand storage device's below is equipped with the ejection of compact pipeline, and the bottom of ejection of compact pipeline is equipped with the discharge gate, and ejection of compact pipeline and drainage sand storage device are located the top of the receiving hopper of steel-tapping hole top, still including can control the switching device of discharge gate switching, and the support can drive drainage sand storage device, ejection of compact pipeline and discharge gate horizontal migration and then be located the receiving hopper top or keep away from the receiving hopper. The steel tapping hole sand adding device is suitable for adding sand in a horizontal position, and cannot be applied to an electric furnace which does not add sand in the horizontal position.
Disclosure of Invention
Aiming at the problems of high labor intensity, low safety, low operation efficiency, special requirements on drainage sand drop points, waste of drainage sand materials and the like of the prior art when the existing electric arc furnace is filled with the drainage sand, the invention provides the pneumatic sand feeding system and the sand feeding method for the electric furnace, which effectively lighten the labor intensity of post workers, improve the operation safety and the operation efficiency, improve the smelting rhythm of the electric furnace, ensure the sand feeding success rate and reduce the waste of the drainage sand materials.
The technical scheme for solving the technical problems is as follows:
the invention relates to an electric furnace pneumatic sand feeding system, which comprises a raw material bin, an electric furnace, a receiving bin higher than the electric furnace, and a multi-degree-of-freedom hook device arranged above a sand feeding port of an upper furnace shell of the electric furnace, wherein a self-locking sand feeding hopper is hung on the multi-degree-of-freedom hook device; the outlet of the raw material bin is connected with a pneumatic conveying mechanism, the pneumatic conveying mechanism is connected with the receiving bin through a conveying pipe, and the outlet of the receiving bin is connected with the self-locking sand adding hopper through a hose.
Further, the self-locking sand adding hopper comprises a central material pipe communicated with the hose, a hanging ring used for hanging on the multi-degree-of-freedom hook device is arranged at the top of the central material pipe, and a sand adding hopper body is fixedly arranged at the outer side of the pipe wall at the lower part of the central material pipe; a baffle is arranged on the inner side of the central material pipe at the sand hopper body, a plurality of long upper openings and lower openings are respectively and uniformly formed in the pipe walls of the central material pipe at the upper side and the lower side of the baffle correspondingly, and the bottom end of the lower opening is not lower than the bottom end of the sand hopper body; the outside of the central material pipe is also provided with a sleeve switch capable of moving up and down, and the length of the sleeve switch is larger than the distance between one end, away from each pair of upper openings and one end, away from each other, of the lower openings.
Further, the multi-degree-of-freedom hook device comprises a fixed plate, a hook body and a hook head, wherein the fixed plate is movably connected with the hook body through a horizontal hinge, and the hook body is movably connected with the hook head through a vertical hinge.
According to the technical scheme, the pneumatic sand feeding system of the electric furnace comprises the air lock connected to the bottom of the raw material bin, the air lock is connected with the ejector, the tail end of the ejector is connected with the compressed air source, and the outlet of the ejector is connected with the material receiving bin through the material conveying pipe.
Further, a discharger is arranged between the conveying pipe and the receiving bin. Preferably, the discharger is a cyclone discharger.
Further, the electric furnace pneumatic sand feeding system further comprises a controller, the tail end of the ejector is connected with a compressed air source through an electromagnetic valve, a material level switch is arranged at the top of the material receiving bin, and the air lock, the electromagnetic valve and the material level switch are connected into the controller through lines respectively.
The sand adding method of the electric furnace pneumatic sand adding system in the technical scheme comprises the following steps:
s1, feeding: the drainage sand in the raw material bin is formed into gas-solid two-phase fluid through a pneumatic conveying mechanism and is sent into a receiving bin through a conveying pipe;
s2, adding sand: the self-locking sand adding hopper is hung on the multi-degree-of-freedom hook device, then drainage sand in the receiving bin is sent to the self-locking sand adding hopper through a hose by means of dead weight, the falling point of the drainage sand is aligned to the position of the tapping hole of the electric furnace through the multi-degree-of-freedom hook device, and then sand adding operation is carried out through the self-locking sand adding hopper.
Further, when sand is added, an operator lifts the sleeve switch, the drainage sand is sent into the sand adding hopper body from each upper opening of the central material pipe, then enters the central material pipe again through each lower opening, and is added into the steel tapping hole.
Further, the controller and the material level switch are used for carrying out interlocking control on the air lock and the electromagnetic valve, so that ventilation and feeding are ensured during feeding, and after feeding is finished, material stopping is carried out firstly and then air stopping is carried out.
Compared with the prior art, the invention has the following beneficial effects:
1. the electric furnace pneumatic sand feeding system has novel design and reasonable structure, the diversion sand and the compressed gas are mixed and fluidized through the gas locking device and the ejector to form gas-solid two-phase fluid, and then the gas-solid two-phase fluid is sent into the discharger for gas and diversion and separation, so that the pneumatic conveying of diversion sand materials is realized, the mechanism works reliably, and the failure rate is extremely low;
2. according to the invention, through the interlocking control of the motor of the air lock and the electromagnetic valve connected with the ejector, the accurate control of feeding is realized and the working reliability of the whole system is ensured;
3. according to the invention, the fixing plate, the hook body and the hook head are movably connected by the multi-degree-of-freedom hook device and the self-locking sand adding hopper, so that an operator can easily align the drainage sand drop point of the self-locking sand adding hopper hung on the hook head with the position of the steel outlet of the electric furnace, and the effects of improving sand adding efficiency and sand adding quality are achieved;
4. according to the self-locking sand adding hopper, when sand is added, only the sleeve adding switch is required to move upwards, the drainage sand can flow into the sand adding hopper body from each upper opening at the upper part of the baffle plate of the central sleeve, then flows into the lower part of the central material pipe through each lower opening and finishes the drainage sand filling work through the outlet, and after the sand adding is finished, the sleeve switch can automatically move downwards under the action of self gravity to block each upper opening and each lower opening to stop sand flow; the self-locking sand adding hopper is simple in structure, light in overall weight, convenient for sand adding operation, capable of accurately controlling drainage sand materials and reducing waste, and reduces the working intensity of operators;
5. by using the sand adding method, the time of the whole sand adding link can be shortened (from 3 minutes to 2 minutes), the smelting rhythm of the electric furnace is improved, the sand adding speed and the sand adding quality are both improved, the material consumption of the diversion sand is reduced, the labor intensity of operators is greatly reduced, and the safety is ensured.
Drawings
FIG. 1 is a schematic diagram of the pneumatic sand feeding system of the electric furnace;
FIG. 2 is a schematic top view of the pneumatic sand feeding system of the electric furnace of the present invention;
FIG. 3 is a schematic view of a multi-degree of freedom hook apparatus according to the present invention;
FIG. 4 is a schematic side view of a multiple degree of freedom hook apparatus of the present invention;
FIG. 5 is a schematic view of the self-locking sand hopper according to the present invention;
FIG. 6 is a schematic top view of a self-locking sand hopper according to the present invention;
FIG. 7 is a schematic diagram of the interlocking control of the controller, level switch, air lock and solenoid valve of the present invention;
in the figure: 1. a raw material bin; 2. an air lock; 3. an ejector; 31. an electromagnetic valve; 4. a feed delivery pipe 5, a discharger; 6. receiving a storage bin; 61. a material level switch; 7. a hose; 8. a multi-degree-of-freedom hook device; 9. self-locking sand adding hopper; 10. an electric furnace; 11. a fixing plate; 12. a horizontal hinge; 13. a hook body; 14. a vertical hinge; 15. a hook head; 21. a hanging ring; 22. a center tube; 23. a sleeve switch; 24. a sand hopper body; 25. an upper opening; 26. a lower opening; 27. a baffle; 28. and a controller.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. As used in the specification and claims of the present published patent application, "upper", "lower", "left", "right", "front", "rear", etc. are used only to indicate relative positional relationships, which change when the absolute position of the object to be described changes; the terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The present invention is not described in detail in the present application, and is well known to those skilled in the art.
Example 1:
as shown in fig. 1 to 6, the pneumatic sand feeding system of the electric furnace comprises a raw material bin 1, an electric furnace 10, a material receiving bin 6 and a multi-degree-of-freedom hook device 8, wherein the material receiving bin 6 is higher than the electric furnace 10, the multi-degree-of-freedom hook device 8 is arranged above a sand feeding hole (namely a steel tapping hole) of a furnace shell on the electric furnace 10, a self-locking sand feeding hopper 9 is hung on the multi-degree-of-freedom hook device 8, the multi-degree-of-freedom hook device 8 can be adjusted in multiple degrees, and the self-locking sand feeding hopper 9 hung on the multi-degree-of-freedom hook device is driven to adjust in position, so that the drainage sand falling point of the self-locking sand feeding hopper 9 is aligned with the steel tapping hole of the electric furnace; the outlet of the raw material bin 1 is connected with a pneumatic conveying mechanism for conveying drainage sand materials, the pneumatic conveying mechanism is connected with a receiving bin 6 through a conveying pipe 4, and the outlet of the receiving bin 6 is connected with a self-locking sand adding hopper 9 through a hose 7. In the embodiment, the raw material bin 1 stores the diversion sand material, the diversion sand and the compressed air are gently fluidized through a pneumatic conveying mechanism connected with an outlet of the diversion sand material to form gas-solid two-phase fluid, then the gas-solid two-phase fluid is sent into the material receiving bin 6 through the material conveying pipe 4, the material receiving bin 6 is higher than the electric furnace 10, the diversion sand flows to the self-locking sand adding hopper 9 through the hose 7 under the action of gravity, and the outlet position of the self-locking sand adding hopper 9 is aligned with the tapping hole position of the electric furnace 10 through the multi-degree-of-freedom hook device 8, so that sand adding operation can be performed.
In the embodiment, the pneumatic conveying mechanism comprises an air lock 2 connected to the bottom of a raw material bin 1, an ejector 3 is connected to the air lock 2, the tail end of the ejector 3 is connected with a compressed air source, and an outlet is connected with a material receiving bin 6 through a material conveying pipe 4; during feeding, the air lock 2 continuously operates, the drainage sand in the raw material bin 1 is uniformly added into the ejector 3, then the drainage sand in the ejector 3 is mixed with compressed air connected from the tail end of the ejector 3 and fluidized to form gas-solid two-phase fluid, and the gas-solid two-phase fluid is sent into the conveying pipe 4 and finally sent to the receiving bin 6.
In this embodiment, the multi-degree-of-freedom hook device 8 is designed to facilitate the adjustment and control of the sand flow drop point by the operator, and comprises a fixing plate 11, a hook body 13 and a hook head 15, wherein the fixing plate 11 and the hook body 13 are movably connected through a horizontal hinge 12, the hook body 13 and the hook head 15 are movably connected through a vertical hinge 14, through the above structure, under the action of the horizontal hinge 12, the hook body 13 can swing left and right relative to the fixing plate 11, under the action of the vertical hinge 14, the hook head 15 can move back and forth relative to the hook body 13, so that the hook head 15 can flexibly adjust the position of the drainage sand drop point, so that the self-locking sand adding hopper 9 hung on the hook head 15 can be flexibly adjusted, the hook head 15 can be made into a flat surface shape, and the self-locking sand adding hopper 9 is convenient for the operator to hang.
In this embodiment, the self-locking sand adding hopper 9 is also specially designed to facilitate the adjustment and control of the sand flow by the operator, and comprises a central pipe 22 communicated with the hose 7, a hanging ring 21 for hanging on the multi-degree-of-freedom hook device 8 is arranged at the top of the central pipe 22, and a sand adding hopper body 24 is fixedly arranged at the outer side of the lower pipe wall; a baffle 27 is arranged on the inner side of the central material pipe 22 at the sand hopper body 24, the baffle 27 divides the central material pipe 22 into an upper section and a lower section, a plurality of strip-shaped upper openings 25 and lower openings 26 are respectively and uniformly formed on the pipe walls of the central material pipe 22 at the upper side and the lower side of the baffle 27 correspondingly, the upper openings 25 and the lower openings 26 are all in the range of the sand hopper body 24, and the bottom end of the lower opening 26 is not lower than the bottom end of the sand hopper body 24; the outside of the central tube 22 is also provided with a sleeve switch 23 which can move up and down, the length of the sleeve switch 23 is longer than the distance between the upper opening 25 and the lower opening 26 of each pair, which are far away from one end, and when the sleeve switch moves up and down, the bottom can be limited through the bottom of the inside of the sand hopper body 24; through the structure, when sand is required to be added into the steel outlet of the electric furnace, the sleeve switch 23 is moved upwards, at the moment, the drainage sand enters the sand hopper body 24 from each upper opening 25 at the upper layer of the central material pipe 22, then enters the lower layer of the central material pipe 22 from each lower opening 26, and finally enters the steel outlet from the outlet of the central material pipe 22; when the sand feeding is finished, the operator puts down the sleeve switch 23, the sleeve switch 23 automatically moves downwards under the action of gravity, the upper opening 25 and the lower opening 26 are blocked, and the sand flow is stopped.
In this embodiment, a discharger 5 is disposed between the material conveying pipe 4 and the material receiving bin 6, preferably, the discharger 5 is a cyclone discharger, so as to separate gas of gas-solid two-phase fluid from drainage sand, the drainage sand is settled into the material receiving bin 6 for storage, and the gas is connected and sucked away by a dust removing system of the discharger 5 and the electric furnace.
Example 2:
on the basis of the embodiment 1, as shown in fig. 1-7, the pneumatic sand feeding system of the electric furnace further comprises a controller 28, the tail end of the ejector 3 is connected with a compressed air source through a solenoid valve 31, a material level switch 61 is arranged at the top of the receiving bin 6, and the air lock 2, the solenoid valve 31 and the material level switch 61 are respectively connected into the controller 28 through lines. When the full signal of the material level switch 61 is transmitted to the controller 28 during feeding, the controller 28 controls the air lock 2 and the electromagnetic valve 31 to stop feeding; in addition, the electromagnetic valve 31 connected to the injector 3 can be interlocked with the motor of the air lock 2, so that ventilation and then feeding are ensured at the beginning of feeding, and air is stopped after stopping feeding.
Example 3
The sand adding method of the electric furnace pneumatic sand adding system in the embodiment 1 or 2 comprises the following steps:
s1, feeding: mixing the drainage sand in the raw material bin 1 with compressed air in an ejector 3 through a gas locker 2 to form a gas-solid two-phase fluid, then conveying the gas-solid two-phase fluid to a discharger 5 through a conveying pipe 4, settling the drainage sand in the gas-solid two-phase fluid into a receiving bin 6 by the discharger 5, and sucking the gas through a dust fall system of the electric furnace;
s2, adding sand: the self-locking sand adding hopper 9 is hung on the multi-degree-of-freedom hook device 8, then drainage sand in the receiving bin 6 is sent to the self-locking sand adding hopper 9 through the hose 7 by means of dead weight, the dropping point of the drainage sand is aligned to the position of the tapping hole of the electric furnace 10 through the multi-degree-of-freedom hook device 8, and then sand adding operation is carried out through the self-locking sand adding hopper 9.
In this embodiment, during sand feeding, the operator lifts the sleeve switch 23, directs sand from each upper opening 25 of the central tube 23 into the hopper body 24, and then reenters the central tube 23 through each lower opening 26 and into the tap hole.
In order to improve the reliability of the sand feeding operation, in this embodiment, the air lock 2 and the electromagnetic valve 31 can be interlocked by the controller 28 and the level switch 61, and the level switch 61 is used for controlling the feeding to be performed or stopped by a signal, and ensuring that the feeding is performed before ventilation is performed at the beginning of feeding, and the feeding is stopped before stopping after completion of feeding.
After the invention is applied, the actual production time per furnace is reduced by 1 minute, each round of production is carried out for 550 furnaces, each month is calculated for 22 days, the smelting time is saved by 550 multiplied by 30/22 multiplied by 12=9000 minutes each year, the steel tapping amount per furnace is calculated for 115 tons at the current smelting rhythm for 40 minutes, the steel can be produced more by 25875 tons all the year, and if the steel benefit per ton is calculated for 300 yuan, the benefit 776.25 ten thousand yuan can be realized.
Claims (7)
1. The utility model provides an electric stove strength adds sand system, includes former feed bin (1) and electric stove (10), its characterized in that: the device also comprises a receiving bin (6) which is higher than the electric furnace (10) and a multi-degree-of-freedom hook device (8) which is arranged above the sand adding port of the upper furnace shell of the electric furnace (10), wherein the multi-degree-of-freedom hook device (8) is hung with a self-locking sand adding hopper (9); the outlet of the raw material bin (1) is connected with a pneumatic conveying mechanism, the pneumatic conveying mechanism is connected with a receiving bin (6) through a conveying pipe (4), and the outlet of the receiving bin (6) is connected with a self-locking sand adding hopper (9) through a hose (7);
the self-locking sand adding hopper (9) comprises a central material pipe (22) communicated with the hose (7), a hanging ring (21) used for hanging on the multi-degree-of-freedom hook device (8) is arranged at the top of the central material pipe (22), and a sand adding hopper body (24) is fixedly arranged at the outer side of the lower pipe wall of the self-locking sand adding hopper; a baffle (27) is arranged on the inner side of the central material pipe (22) at the sand hopper body (24), a plurality of long upper openings (25) and lower openings (26) are respectively and uniformly formed in the pipe wall of the central material pipe (22) at the upper side and the lower side of the baffle (27), and the bottom end of the lower opening (26) is not lower than the bottom end of the sand hopper body (24); the outside of the central tube (22) is also provided with a sleeve switch (23) which can move up and down, and the length of the sleeve switch (23) is longer than the distance between the far ends of each pair of upper openings (25) and lower openings (26);
the multi-degree-of-freedom hook device (8) comprises a fixed plate (11), a hook body (13) and a hook head (15), wherein the fixed plate (11) is movably connected with the hook body (13) through a horizontal hinge (12), the hook body (13) is movably connected with the hook head (15) through a vertical hinge (14), and the hook head (15) is integrally straight;
the pneumatic conveying mechanism comprises an air locker (2) connected to the bottom of the raw material bin (1), an ejector (3) is connected to the air locker (2), the tail end of the ejector (3) is connected with a compressed air source, and the outlet of the ejector is connected with the material receiving bin (6) through a conveying pipe (4).
2. The pneumatic sanding system of an electric furnace according to claim 1, wherein: a discharger (5) is arranged between the conveying pipe (4) and the receiving bin (6).
3. An electric furnace pneumatic sanding system as defined in claim 2, wherein: the discharger (5) is a cyclone discharger.
4. A pneumatic sanding system for an electric furnace as claimed in any one of claims 1 to 3 wherein: the automatic air lock is characterized by further comprising a controller (28), wherein the tail end of the ejector (3) is connected with a compressed air source through an electromagnetic valve (31), a material level switch (61) is arranged at the top of the receiving bin (6), and the air lock (2), the electromagnetic valve (31) and the material level switch (61) are connected into the controller (28) through circuits respectively.
5. The sand adding method of the pneumatic sand adding system of the electric furnace according to claim 4, wherein the steps are as follows:
s1, feeding: the drainage sand in the raw material bin (1) is formed into gas-solid two-phase fluid through a pneumatic conveying mechanism and is sent into a receiving bin (6) through a conveying pipe (4);
s2, adding sand: the self-locking sand adding hopper (9) is hung on the multi-degree-of-freedom hook device (8), then drainage sand in the receiving bin (6) is sent to the self-locking sand adding hopper (9) through the hose (7) by self weight, the falling point of the drainage sand is aligned to the position of the tapping hole of the electric furnace (10) through the multi-degree-of-freedom hook device (8), and then sand adding operation is carried out through the self-locking sand adding hopper (9).
6. The sand adding method of the pneumatic sand adding system of the electric furnace according to claim 5, wherein the sand adding method comprises the following steps: during sand feeding, an operator lifts the sleeve switch (23), and drainage sand is fed into the sand feeding hopper body (24) from each upper opening (25) of the central material pipe (22), then enters the central material pipe (22) again through each lower opening (26) and is fed into the steel tapping hole.
7. The sand adding method of the pneumatic sand adding system of the electric furnace according to claim 5, wherein the sand adding method comprises the following steps: the interlocking control is carried out on the air lock (2) and the electromagnetic valve (31) through the controller (28) and the material level switch (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210510499.5A CN114772215B (en) | 2022-05-11 | 2022-05-11 | Pneumatic sand adding system and sand adding method for electric furnace |
Applications Claiming Priority (1)
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Citations (6)
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| US4395179A (en) * | 1976-03-10 | 1983-07-26 | Davy Inc. | Apparatus and method for charging material into a receptacle |
| CN103789044A (en) * | 2014-01-22 | 2014-05-14 | 煤炭科学研究总院 | Coal powder conveying device |
| CN104065927A (en) * | 2014-06-25 | 2014-09-24 | 中国矿业大学 | Solid filling mining feeding and conveying monitoring system |
| CN204209081U (en) * | 2014-09-23 | 2015-03-18 | 江阴兴澄特种钢铁有限公司 | The automatically adding device of ladle draining sand |
| CN205708867U (en) * | 2016-04-13 | 2016-11-23 | 湖南杉杉能源科技股份有限公司 | A kind of gas force transmission system |
| CN214878521U (en) * | 2021-06-02 | 2021-11-26 | 上海精汇包装设备有限公司 | Dry-mixing feeding system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9993908B2 (en) * | 2015-04-08 | 2018-06-12 | Cyclonaire Corporation | Pneumatically powered locomotive sander |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4395179A (en) * | 1976-03-10 | 1983-07-26 | Davy Inc. | Apparatus and method for charging material into a receptacle |
| CN103789044A (en) * | 2014-01-22 | 2014-05-14 | 煤炭科学研究总院 | Coal powder conveying device |
| CN104065927A (en) * | 2014-06-25 | 2014-09-24 | 中国矿业大学 | Solid filling mining feeding and conveying monitoring system |
| CN204209081U (en) * | 2014-09-23 | 2015-03-18 | 江阴兴澄特种钢铁有限公司 | The automatically adding device of ladle draining sand |
| CN205708867U (en) * | 2016-04-13 | 2016-11-23 | 湖南杉杉能源科技股份有限公司 | A kind of gas force transmission system |
| CN214878521U (en) * | 2021-06-02 | 2021-11-26 | 上海精汇包装设备有限公司 | Dry-mixing feeding system |
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| CN114772215A (en) | 2022-07-22 |
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