A slag vertical mill circulating material system for optimizing external discharge material management

Abstract

The present invention discloses a slag vertical mill circulating material system for optimizing external material management, including a vertical mill and a first chain conveyor for recycling and conveying large-particle slag and iron slag outputted by the vertical mill, as well as a grinding material processing system, a circulating material processing system and an output system for vertical mill feeding, recycling and discharging, respectively, and the present invention relates to the technical field of slag micro-powder production. The slag vertical mill circulating material system for optimizing external material management replaces the traditional external slag material pool by adding a buffer bin process device, which is used for temporary storage of external slag during shutdown due to a fault, and is fully used for slag micro-powder production during normal production. Except for the by-product iron particles obtained by magnetic separation, no material is discharged during the entire production. The buffer bin is used to realize the reuse of the external discharge volume, reduce environmental pollution, and realize the clean production of the slag vertical mill production line. It has good market promotion prospects in the cement industry and slag micro-powder industry using vertical mills.

Description

Technical Field

[0001] The invention relates to the technical field of slag micro-powder production, and in particular to a slag vertical mill circulating material system for optimizing external discharge management. Background Art

[0002] The main raw material of slag powder is granulated slag discharged from iron-making blast furnaces. It is an industrial waste slag that flows out in a high-temperature molten state and is rapidly cooled by water quenching. It is a silicate cementitious material with high potential activity. It is mainly used to replace part of the cement in concrete and as a functional material for concrete.

[0003] Slag vertical mill is a process equipment for producing slag powder, which has the functions of drying, grinding, powder selection and material conveying. Figure 1 As shown, the existing slag vertical mill circulation system consists of a vertical mill, a first chain conveyor, an inlet grinding material processing system, a circulation material processing system and an output system. In the inlet grinding material processing system, the slag in the slag bin is transported to the vertical mill by a belt conveyor. When a fault occurs and the machine is shut down, the inlet grinding slag is switched to an external discharge pipeline through a first pneumatic three-way valve, and the externally discharged slag is collected in an inlet grinding material external discharge pool and transported to a storage yard by vehicles. In the circulation material processing system, the slag that has not been ground into fine particles after passing through the vertical mill is successively sent back to the vertical mill through the first chain conveyor, the first elevator, the second pneumatic three-way valve, the magnetic drum separator and the second chain conveyor for re-grinding. When a fault occurs and the machine is shut down, The second pneumatic three-way valve is switched to the external discharge pipeline to collect the discharged slag in the circulating material external discharge pool, wherein the existing circulating material external discharge pool is usually divided into two material pools for storing external slag and iron slag respectively. In the output system, the fine powder, i.e. the finished product, is collected by the bag dust collector and sent to the finished product warehouse for storage via the air conveying chute and the second elevator in turn, while the exhaust gas is dedusted by the bag dust collector and extracted by the fan. For energy-saving considerations, a part of the exhaust gas enters the vertical mill for recycling, and the excess exhaust gas is discharged into the atmosphere through the chimney. The drying heat source is generated by the hot air furnace and is drawn into the vertical mill by the fan to dry the slag entering the mill. The entire slag micro-powder production system is operated under negative pressure.

[0004] Due to the limitations of process technology development, the discharged material contains some powdered materials, which will cause a small amount of environmental pollution when discharged into the material pool. With the increasing pressure on environmental protection and the dual carbon control of process lines, in order to solve the environmental pollution caused by the discharged materials to production and reduce the spillage and carbon emissions caused by transportation, and realize the closed-loop use of materials, a slag vertical mill circulating material system that optimizes the management of discharged materials is proposed to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a slag vertical mill circulating material system that optimizes the management of external discharge materials, solves the environmental pollution problem caused by external discharge materials in production and reduces the spillage and carbon emissions caused by transportation.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a slag vertical mill circulating material system for optimizing external discharge management, comprising a vertical mill and a first chain conveyor for recycling and conveying large-particle slag and iron slag output by the vertical mill, and an inlet mill processing system, a circulating material processing system and an output system for processing the vertical mill feeding, recycling and discharging, respectively.

[0007] The inlet abrasive material processing system includes a slag bin and a belt conveyor erected below the slag bin for conveying slag, and a first buffer bin for storing slag discharge during shutdown due to a fault. The output pipeline of the belt conveyor is provided with a first pneumatic three-way valve, and both output ends of the first pneumatic three-way valve are respectively connected to the vertical mill and the first buffer bin through pipelines. The output end of the first buffer bin is erected above the first chain conveyor.

[0008] The circulating material processing system includes a first elevator installed on one side of the output end of the first chain conveyor, a second buffer bin and a magnetic drum separator for storing and magnetically separating the recovered materials after the machine is shut down due to a fault, and a slag pool and a second chain conveyor for storing and transporting the magnetic and non-magnetic materials output by the magnetic drum separator, respectively. The output pipeline of the first elevator is provided with a second pneumatic three-way valve, and the two output ends of the second pneumatic three-way valve are respectively connected to the second buffer bin and the magnetic drum separator through pipelines. The magnetic drum separator is provided with two discharge pipes for outputting the magnetic and non-magnetic materials, and the output ends of the two discharge pipes are respectively installed above the slag pool and the second chain conveyor, the output pipeline of the second chain conveyor is connected to the vertical mill, and the output end of the second buffer bin is installed above the first chain conveyor.

[0009] The output system includes a hot blast furnace and a bag dust collector which are respectively connected to the bottom and top of the vertical mill through pipelines, and a chimney and a second elevator which are respectively used for waste gas treatment and storage and transportation of slag fine powder. The bag dust collector is connected to the chimney and the second elevator through a main exhaust pipeline equipped with a fan and an air conveying chute, and a branch pipeline for partial waste gas circulation which is connected to the main exhaust pipeline is provided on the pipeline connecting the hot blast furnace and the vertical mill.

[0010] Preferably, the first buffer bin and the second buffer bin have the same structure and are respectively mounted above the input side and the output side of the first chain conveyor through brackets. The first buffer bin includes a hopper and a cover coaxially distributed above the hopper. The cover is connected to the hopper and encloses a storage cavity for storing external discharge materials. The top of the cover is provided with a flange pipe mouth extending vertically outward.

[0011] Preferably, the slag vertical mill circulation material system for optimizing external discharge material management also includes a pre-grinding part coaxially distributed between the hopper and the cover and respectively connected to the hopper and the cover flanges, the pre-grinding part includes a connecting frame and a sieve plate rotatably embedded in the connecting frame, and a motor mounted on the outside of the connecting frame, a large gear is fixedly mounted on the outer wall of the sieve plate, a small gear meshing with the large gear is fixedly connected to the output end of the motor, and a plurality of ribs distributed in a circular array about its axis are welded to the inside of the cover, and the plurality of ribs are distributed in the vertical direction and leave gaps between the sieve plate.

[0012] Preferably, the connecting frame is formed by enclosing and splicing a number of unit frames with arc-shaped structures, and two screws for flange connection are vertically welded on the top and bottom of the unit frames, and an installation groove extending radially outward is provided on the outer wall of one of the unit frames, and the top of the installation groove is covered with a cover plate matched with its shape, and the cover plate is connected to the installation groove and encloses a accommodating cavity for installing the pinion, and the motor is fixedly mounted on the cover plate.

[0013] Preferably, the slag vertical mill circulating material system for optimizing external discharge material management also includes a plurality of scrapers distributed in a circular array and welded to the bottom of the sieve plate, the plurality of scrapers are distributed in the vertical direction and welded with a plurality of reinforcing frames distributed in the vertical direction on the inner side, the reinforcing frames are annular frames distributed along the horizontal plane and have an inwardly inclined conical structure, and the outer sides of the plurality of scrapers are movably fitted with the inner wall of the hopper.

[0014] Preferably, the slag vertical mill circulation material system for optimizing external discharge material management also includes two anti-blocking material ports respectively installed between the output ends of the first buffer bin and the second buffer bin and the first chain conveyor, the anti-blocking material port includes a movable material pipe movably embedded in the output end of the buffer bin in the vertical direction and a fixed material pipe fixedly installed on the top of the closed cover shell of the first chain conveyor and connected to the interior of the closed cover shell, the movable material pipe is coaxially distributed above the fixed material pipe and is connected to a pneumatic butterfly valve at its bottom flange, two cylinders are provided on the outside of the pneumatic butterfly valve in a centrally symmetrical manner about its axis, the bottom of the cylinder is hinged to the closed cover shell through a hinge seat, the output end of the cylinder is hinged to the outer wall of the pneumatic butterfly valve, four guide columns distributed in a ring array are fixedly installed on the top of the fixed material pipe, the four guide columns are distributed in the vertical direction and movably penetrate the flange edge of the bottom of the pneumatic butterfly valve, a telescopic sleeve is installed between the pneumatic butterfly valve and the fixed material pipe and on the outside of the four guide columns.

[0015] Beneficial Effects

[0016] The present invention provides a slag vertical mill circulating material system that optimizes the management of external discharge. Compared with the prior art, it has the following beneficial effects:

[0017] The slag vertical mill circulating material system with optimized external discharge material management replaces the traditional external discharge slag material pool by adding a buffer bin process device, which is used for temporary storage of external discharge slag during shutdown due to faults, and is fully used for slag micro-powder production during normal production. Except for the by-product iron particles obtained through magnetic separation, no material is discharged during the entire production process. The buffer bin is used to reuse the external discharge volume, reduce environmental pollution and carbon emissions, and realize clean production of the slag vertical mill production line. It has good market promotion prospects in the cement industry and slag micro-powder industry using vertical mills, meets the company's personalized pursuit of low carbon, environmental protection, and economy, and adds new options for environmental protection, low carbon, and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the traditional slag vertical powder process flow chart;

[0019] Figure 2 This is a flow chart of the slag vertical powder process of the present invention;

[0020] Figure 3 This is a schematic diagram of the installation structure of the first buffer bin and the second buffer bin of the present invention;

[0021] Figure 4 This is a schematic structural diagram of the first buffer bin of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the sealing cover of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the pre-grinding part of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the scraper of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the anti-blocking material port of the present invention;

[0026] In the figure: 1. vertical mill; 2. first chain conveyor; 3. inlet abrasive handling system; 4. circulating material handling system; 5. output system; 6. slag bin; 7. belt conveyor; 8. first pneumatic three-way valve; 9. first buffer bin; 10. first elevator; 11. second pneumatic three-way valve; 12. second buffer bin; 13. magnetic drum separator; 14. iron slag pool; 15. second chain conveyor; 16. hot air furnace; 17. bag filter; 18. fan; 19. air conveying chute; 20. chimney; 21. second elevator Elevator; 22. Bracket; 23. Hopper; 24. Cover; 25. Flange pipe mouth; 26. Pre-grinding part; 27. Connecting frame; 28. Screen plate; 29. ​​Big gear; 30. Motor; 31. Small gear; 32. Rib plate; 33. Unit frame; 34. Screw; 35. Mounting groove; 36. Cover plate; 37. Scraper; 38. Reinforcement frame; 39. Anti-blocking material port; 40. Movable material pipe; 41. Fixed material pipe; 42. Pneumatic butterfly valve; 43. Cylinder; 44. Hinge seat; 45. Guide column; 46. Telescopic sleeve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 2The present invention provides a technical solution: a slag vertical mill circulating material system for optimizing external discharge management, comprising a vertical mill 1 and a first chain conveyor 2 for recycling and conveying large-particle slag and iron slag output by the vertical mill 1, and an inlet grinding material processing system 3, a circulating material processing system 4 and an output system 5 for processing the feeding, recycling and discharging of the vertical mill 1 respectively, the inlet grinding material processing system 3 comprises a slag bin 6 and a belt conveyor 7 erected below the slag bin 6 for conveying slag, and a first buffer bin 9 for storing slag external discharge when the machine is shut down due to a fault, and a belt conveyor 7 for storing the slag external discharge when the machine is shut down due to a fault. The output pipeline of the conveyor 7 is provided with a first pneumatic three-way valve 8, and the two output ends of the first pneumatic three-way valve 8 are respectively connected to the vertical mill 1 and the first buffer bin 9 through pipelines. The output end of the first buffer bin 9 is set above the first chain conveyor 2. The circulating material processing system 4 includes a first elevator 10 set on one side of the output end of the first chain conveyor 2 and a second buffer bin 12 and a magnetic drum separator 13 for storing the external material recovered during the failure shutdown and for magnetic separation of the recovered material, and a magnetic material and a non-magnetic material output by the magnetic drum separator 13. The iron slag pool 14 and the second chain conveyor 15 for storage and transportation, the output pipeline of the first hoist 10 is provided with a second pneumatic three-way valve 11, and the two output ends of the second pneumatic three-way valve 11 are respectively connected to the second buffer bin 12 and the magnetic drum separator 13 through pipelines, the magnetic drum separator 13 is provided with two discharge pipes for outputting magnetic materials and non-magnetic materials respectively, and the output ends of the two discharge pipes are respectively set above the iron slag pool 14 and the second chain conveyor 15, the output pipeline of the second chain conveyor 15 is connected to the vertical mill 1, and the output of the second buffer bin 12 is connected to the vertical mill 1. The end is erected above the first chain conveyor 2, and the output system 5 includes a hot blast furnace 16 and a bag dust collector 17 respectively connected to the bottom and top of the vertical mill 1 through pipelines, and a chimney 20 and a second elevator 21 respectively used for exhaust gas treatment and storage and transportation of slag fine powder. The bag dust collector 17 is connected to the chimney 20 and the second elevator 21 through a main exhaust pipeline equipped with a fan 18 and an air conveying chute 19, and a branch pipeline for partial exhaust gas circulation connected to the main exhaust pipeline is provided on the pipeline connecting the hot blast furnace 16 and the vertical mill 1.

[0029] Based on the above-mentioned structural setting, the slag vertical mill circulating material system for optimizing the external discharge management is composed of a vertical mill 1, a first chain conveyor 2, an inlet abrasive processing system 3, a circulating material processing system 4 and an output system 5. In the specific working process, in the inlet abrasive processing system 3, the slag in the slag bin 6 is sent to the vertical mill 1 via the belt conveyor 7. A belt feeding scale can be set at the bottom of the slag bin 6, so that the slag in the slag bin 6 is measured and discharged by the belt feeding scale. The slag sent by the belt conveyor 7 is fed into the vertical mill 1 through the first pneumatic three-way valve 8 to be dried and ground. When a fault occurs and the machine is shut down, the slag can be discharged to the first buffer bin 9 by switching the output port of the first pneumatic three-way valve 8. When normal production is restored, the output port of the first pneumatic three-way valve 8 is switched again, and the temporary The discharged slag stored in the first buffer bin 9 can be recovered by the first chain conveyor 2. In the vertical mill 1, the slag fed into the vertical mill 1 is squeezed by the grinding roller on the rotating grinding disc and crushed under a certain load by the hydraulic tensioning device. A part of the ground material is thrown to the edge of the grinding disc under the centrifugal force of the rotating grinding disc, and is sent to the high-efficiency powder classifier located on the upper part of the vertical mill 1 by the hot air rising from the edge of the grinding disc to be sorted into coarse powder and fine powder. In the output system 5, the fine powder, i.e. the finished product, is collected by the bag dust collector 17 and sent to the finished product warehouse for storage through the air conveying chute 19 and the second elevator 21 in turn. The exhaust gas is dedusted by the bag dust collector 17 and then extracted by the fan 18. For energy saving considerations, a part of the exhaust gas enters the vertical mill 1 for recycling, and the excess exhaust gas is discharged into the atmosphere through the chimney. The dry heat source is generated by the hot blast furnace 16 and is drawn into the vertical mill 1 by the fan 18 to dry the slag entering the mill. In the circulating material processing system 4, the coarse powder falls on the grinding disc and is ground again. The large particles of slag and iron slag that cannot be blown up by the hot air fall into the bellows under the grinding disc and are sent back to the vertical mill 1 for further grinding by the first chain conveyor 2, the first elevator 10, the second pneumatic three-way valve 11, the magnetic drum separator 13 and the second chain conveyor 15 in sequence. When the machine is shut down due to a fault, the output port of the second pneumatic three-way valve 11 is switched, and the slag is discharged into the second buffer bin 12. When normal production is resumed, the output port of the second pneumatic three-way valve 11 is switched again, and the slag temporarily stored in the second buffer bin 12 can be recovered by the first chain conveyor 2. Among them, the slag passing through the magnetic drum separator 13 is The slag is divided into magnetic material and non-magnetic material. The magnetic material is sent to the iron slag pool 14, and the non-magnetic material is sent to the second chain conveyor 15. The slag vertical mill circulating material system that optimizes the external discharge material management replaces the traditional external discharge slag material pool by adding a buffer bin process device, which is used for temporary storage of external discharge slag during shutdown due to failure, and is all used for slag micro-powder production during normal production. Except for the by-product iron particles magnetically separated, no material is discharged during the entire production. The buffer bin is used to realize the reuse of the external discharge volume, reduce environmental pollution and carbon emissions, and realize the clean production of the slag vertical mill production line. It has good market promotion prospects in the cement industry and slag micro-powder industry using vertical mills, and meets the personalized pursuit of enterprises for low carbon, environmental protection and economy.It adds new options for environmental protection, low carbon and economy.

[0030] For further information, see Figure 3 and Figure 4 The first buffer bin 9 and the second buffer bin 12 have the same structure and are respectively mounted on the input side and the output side of the first chain conveyor 2 through a bracket 22. The first buffer bin 9 includes a hopper 23 and a cover 24 coaxially distributed above the hopper 23. The cover 24 is connected to the hopper 23 and encloses a storage cavity for storing the external discharge material. The top of the cover 24 is provided with a flange pipe 25 extending vertically outward. Among them, the first buffer bin 9 and the second buffer bin 12 are respectively used as temporary storage devices for the external discharge of abrasive materials and the external discharge of circulating materials during fault shutdown. When normal production is restored, the external discharge materials temporarily stored in the buffer bin can be sent to the vertical mill 1 through the first chain conveyor 2 by the circulating material processing system 4 for re-grinding to achieve closed-loop management of the external discharge materials.

[0031] For further information, see Figure 4-Figure 6 The slag vertical mill circulation material system for optimizing external discharge management also includes a pre-grinding part 26 coaxially distributed between the hopper 23 and the cover 24 and flange-connected to the hopper 23 and the cover 24 respectively. The pre-grinding part 26 includes a connecting frame 27 and a sieve plate 28 rotatably embedded in the connecting frame 27, and a motor 30 mounted on the outside of the connecting frame 27. A large gear 29 is fixedly mounted on the outer wall of the sieve plate 28. A small gear 31 meshing with the large gear 29 is fixedly connected to the output end of the motor 30. A plurality of ribs 32 distributed in a ring array about its axis are welded inside the cover 24. The plurality of ribs 32 are distributed in a vertical direction and leave gaps between the sieve plate 28. Among them, the connecting frame 27 installed between the hopper 23 and the cover 24 by means of a flange is used as a mounting structure. The small gear 31 can be driven by the motor 30 to drive the large gear 29 to rotate, thereby driving the rotation of the sieve plate 28. In conjunction with a number of ribs 32 welded in the cover 24, the discharged material sent to the buffer bin can be pre-grinded when the machine is shut down due to a fault, so as to reduce the working pressure of the vertical mill 1 and improve the powder efficiency of the discharged slag.

[0032] For further information, see Figure 6The connection frame 27 is formed by enclosing and splicing a plurality of arc-shaped unit frames 33. Two screws 34 for flange connection are vertically welded on the top and bottom of the plurality of unit frames 33. A mounting groove 35 extending radially outward is provided on the outer wall of one of the unit frames 33. The top of the mounting groove 35 is covered with a cover plate 36 adapted to its shape. The cover plate 36 is connected to the mounting groove 35 and encloses a receiving cavity for installing the pinion 31. The motor 30 is fixedly mounted on the cover plate 36. Among them, since the sieve plate 28 is rotatably embedded in the connecting frame 27, in order to ensure the smooth rotation of the sieve plate 28, the connecting frame 27 is a concave frame structure, and its concave part is used to limit the sieve plate 28. In order to facilitate the installation of the sieve plate 28 in the connecting frame 27, as a preference, the connecting frame 27 is composed of several unit frames 33. At the same time, two screws 34 are vertically welded to the top and bottom of the unit frame 33 to facilitate the connection frame 27 to the flanges of the cover 24 and the hopper 23 respectively.

[0033] For further information, see Figure 7 The slag vertical mill circulating material system for optimizing external discharge management also includes a plurality of scrapers 37 distributed in a ring array and welded to the bottom of the sieve plate 28. The plurality of scrapers 37 are distributed in the vertical direction and welded to the inner side with a plurality of reinforcing frames 38 distributed in the vertical direction. The reinforcing frames 38 are ring frames distributed along the horizontal plane and have an inwardly inclined conical structure. The outer sides of the plurality of scrapers 37 are movably fitted with the inner wall of the hopper 23. Among them, the rotation of the sieve plate 28 and the several ribs 32 welded in the cover 24 can pre-grind the external discharge material entering the buffer bin. Preferably, a rotatable sieve plate 28 is used, and several scrapers 37 distributed in a circular array are welded at its bottom. As the sieve plate 28 rotates, the several scrapers 37 act on the inner wall of the hopper 23 to avoid the slag powder adhering to the inner wall of the hopper 23, thereby increasing the functionality. In addition, several reinforcement frames 38 are welded on the inner side of the several scrapers 37 to ensure the structural strength of the several scrapers 37, and the reinforcement frame 38 adopts an annular frame structure with an inwardly inclined cone surface to avoid the accumulation of slag powder on the top of the reinforcement frame 38.

[0034] For further information, see Figure 8The slag vertical mill circulation material system for optimizing external discharge management also includes two anti-blocking material ports 39 respectively installed between the output ends of the first buffer bin 9 and the second buffer bin 12 and the first chain conveyor 2. The anti-blocking material port 39 includes a movable material pipe 40 movably embedded in the output end of the buffer bin along the vertical direction and a fixed material pipe 41 fixedly installed on the top of the closed cover of the first chain conveyor 2 and connected to the inside of the closed cover. The movable material pipe 40 is coaxially distributed above the fixed material pipe 41 and is flange-connected to a pneumatic butterfly valve 42 at its bottom. Two cylinders 43 are provided on the outside of the pneumatic butterfly valve 42 and are centrally symmetrically distributed about its axis. The bottom of the cylinder 43 is hinged to the closed cover through a hinge seat 44, and the output end of the cylinder 43 is hinged to the outer wall of the pneumatic butterfly valve 42. Four guide pillars 45 distributed in a circular array are fixedly installed on the top of the fixed material pipe 41. The four guide pillars 45 are distributed in the vertical direction and movably penetrate the flange edge at the bottom of the pneumatic butterfly valve 42. A telescopic sleeve 46 is installed between the pneumatic butterfly valve 42 and the fixed material pipe 41 and on the outside of the four guide pillars 45. Among them, when normal production is resumed, the external discharge material temporarily stored in the buffer bin is discharged from the bottom of the bin into the first chain conveyor 2. Specifically, by setting an anti-blocking material port 39 at the bottom of the buffer bin, with the help of the synchronous extension and contraction of the output ends of the two cylinders 43, the pneumatic butterfly valve 42 can drive the movable material pipe 40 to rise and fall at the output end of the buffer bin, thereby helping to dredge the discharge port. The dredged slag material is sent to the first chain conveyor 2 through the fixed material pipe 41. The setting of the guide column 45 is used to ensure the stability of the lifting and lowering of the pneumatic butterfly valve 42.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A slag vertical mill circulation system that optimizes the management of external discharge materials. Features: The invention comprises a vertical mill (1) and a first chain conveyor (2) for recovering and conveying large-particle slag and iron slag outputted from the vertical mill (1), and an inlet mill processing system (3), a circulating material processing system (4) and an output system (5) respectively used for processing the inlet, the recycled material and the discharged material of the vertical mill (1); The abrasive material processing system (3) comprises a slag bin (6) and a belt conveyor (7) erected below the slag bin (6) for conveying slag, and a first buffer bin (9) for storing slag discharge when the machine stops due to a fault. The output pipeline of the belt conveyor (7) is provided with a first pneumatic three-way valve (8). Both output ends of the first pneumatic three-way valve (8) are respectively connected to the vertical mill (1) and the first buffer bin (9) through pipelines. The output end of the first buffer bin (9) is erected above the first chain conveyor (2). The circulating material processing system (4) comprises a first elevator (10) erected on one side of the output end of the first chain conveyor (2), a second buffer bin (12) and a magnetic drum separator (13) for storing the recovered discharged material during a shutdown and for magnetic separation of the recovered material, and a slag pool (14) and a second chain conveyor (15) for storing and transporting the magnetic material and the non-magnetic material output by the magnetic drum separator (13), respectively. The output pipeline of the first elevator (10) is provided with a second pneumatic three-way valve (11). The two output ends of the three-way valve (11) are respectively connected to the second buffer bin (12) and the magnetic drum separator (13) through pipelines. The magnetic drum separator (13) is provided with two discharge pipes for outputting magnetic substances and non-magnetic substances respectively, and the output ends of the two discharge pipes are respectively mounted above the slag pool (14) and the second chain conveyor (15). The output pipeline of the second chain conveyor (15) is connected to the vertical mill (1). The output end of the second buffer bin (12) is mounted above the first chain conveyor (2). The output system (5) comprises a hot air furnace (16) and a bag filter (17) which are respectively connected to the bottom and top of the vertical mill (1) through pipelines, and a chimney (20) and a second elevator (21) for waste gas treatment and slag fine powder storage and transportation respectively. The bag filter (17) is connected to the chimney (20) and the second elevator (21) through a main exhaust pipeline equipped with a fan (18) and an air conveying chute (19), and a branch pipeline for partial waste gas circulation connected to the main exhaust pipeline is provided on the pipeline connecting the hot air furnace (16) and the vertical mill (1); The first buffer bin (9) and the second buffer bin (12) have the same structure and are respectively mounted above the input side and the output side of the first chain conveyor (2) through a bracket (22). The first buffer bin (9) includes a hopper (23) and a cover (24) coaxially distributed above the hopper (23). The invention also comprises a pre-grinding part (26) coaxially distributed between the hopper (23) and the cover (24) and flange-connected to the hopper (23) and the cover (24) respectively, the pre-grinding part (26) comprising a connecting frame (27) and a sieve plate (28) rotatably embedded in the connecting frame (27), a plurality of ribs (32) distributed in a circular array about the axis of the ribs (24) are welded inside, the plurality of ribs (32) are distributed in a vertical direction and have gaps between them and the sieve plate (28); It also includes a plurality of scrapers (37) distributed in an annular array and welded to the bottom of the sieve plate (28), the plurality of scrapers (37) are distributed in a vertical direction and welded to the inner side thereof with a plurality of reinforcing frames (38) distributed in the vertical direction, the reinforcing frames (38) are annular frames distributed along a horizontal plane and presenting an inwardly inclined conical structure, and the outer sides of the plurality of scrapers (37) are movably fitted to the inner wall of the hopper (23).

2. A slag vertical mill circulating material system for optimizing discharge material management according to claim 1, Features: The cover (24) is connected to the hopper (23) and encloses a receiving cavity for storing the discharged material. The top of the cover (24) is provided with a flange pipe opening (25) extending vertically outward.

3. A slag vertical mill circulating material system for optimizing discharge material management according to claim 1, Features: It also includes a motor (30) mounted outside the connection frame (27), a large gear (29) is fixedly mounted on the outer wall of the sieve plate (28), and a small gear (31) meshing with the large gear (29) is fixedly connected to the output end of the motor (30).

4. A slag vertical mill circulating material system for optimizing discharge material management according to claim 3, Features: The connection frame (27) is formed by enclosing and splicing a plurality of arc-shaped unit frames (33), the tops and bottoms of the plurality of unit frames (33) are vertically welded with two screws (34) for flange connection, and an outer wall of one of the unit frames (33) is provided with a mounting groove (35) extending radially outward, the top of the mounting groove (35) is covered with a cover plate (36) adapted to its shape, the cover plate (36) is connected to the mounting groove (35) and encloses a receiving cavity for mounting the pinion (31), and the motor (30) is fixedly mounted on the cover plate (36).

5. A slag vertical mill circulating material system for optimizing discharge material management according to claim 1, Features: The invention also comprises two anti-blocking material ports (39) respectively installed between the output ends of the first buffer bin (9) and the second buffer bin (12) and the first chain conveyor (2), the anti-blocking material ports (39) comprising a movable material pipe (40) movably embedded in the output end of the buffer bin in the vertical direction and a fixed material pipe (41) fixedly installed on the top of the closed cover of the first chain conveyor (2) and connected to the inside of the closed cover, the movable material pipe (40) is coaxially distributed above the fixed material pipe (41) and is flange-connected to a pneumatic butterfly valve (42) at its bottom, and the pneumatic butterfly valve (42) is provided with a related Two cylinders (43) are centrally symmetrically distributed about the axis thereof, the bottom of the cylinder (43) is hinged to the closed cover through a hinge seat (44), the output end of the cylinder (43) is hinged to the outer wall of the pneumatic butterfly valve (42), four guide pillars (45) distributed in a ring array are fixedly installed on the top of the fixed material pipe (41), the four guide pillars (45) are distributed in the vertical direction and movably penetrate the flange edge of the bottom of the pneumatic butterfly valve (42), and a telescopic sleeve (46) is installed between the pneumatic butterfly valve (42) and the fixed material pipe (41) and outside the four guide pillars (45).

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