CN112880423B - Method for controlling shutdown and startup in sintering machine overhauling process - Google Patents
Method for controlling shutdown and startup in sintering machine overhauling process Download PDFInfo
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- CN112880423B CN112880423B CN202110103594.9A CN202110103594A CN112880423B CN 112880423 B CN112880423 B CN 112880423B CN 202110103594 A CN202110103594 A CN 202110103594A CN 112880423 B CN112880423 B CN 112880423B
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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
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
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Abstract
The invention relates to the technical field of sintering machines, and particularly discloses a method for controlling shutdown and startup of a sintering machine in the process of overhauling the sintering machine, which comprises the following steps: closing the first bulk material hopper, closing the second bulk material hopper, closing the stop valve, integrally closing the sintering machine, starting to overhaul and completing overhaul, starting the sintering machine, opening the stop valve, starting the first bulk material hopper, starting the second bulk material hopper and integrally starting the sintering machine. According to the control method for shutdown and startup of the sintering machine in the overhauling process, the first bulk material hopper, the second bulk material hopper and the stop valve are closed in sequence before overhauling and shutdown, preparation for storing bedding materials is well made, and the stop valve, the first bulk material hopper and the second bulk material hopper are gradually opened after startup, so that the bedding materials in the bottom material bin are continuously and uninterruptedly supplied, and the problems of yield reduction and the like caused by no bedding materials at the bottom of a sintering trolley in the sintering process are avoided or reduced.
Description
Technical Field
The invention relates to the technical field of sintering machines, in particular to a method for controlling shutdown and startup of a sintering machine in the process of overhauling the sintering machine.
Background
When the sintering machine is overhauled and stopped, the sintering pallet of the sintering machine and the sintering ores on the ring cooling pallet of the ring cooling machine are generally emptied, so that the overhauling is convenient. After the overhaul is finished, the bedding materials in the bedding material bin can be paved on the bottom layer of the sintering trolley after about 30 minutes after the start-up production, the bedding materials stored in the bottom material bin are used up after 30 minutes, at the moment, the sintering ore does not reach the second vibrating screen, the bedding materials are not supplemented to the bottom material bin, and the process usually lasts for about 2-2.5 hours. In addition, because the bottom material is not paved in the sintering trolley, the burning loss of the fire bars and the heat insulation pads arranged on the bottom plate of the sintering trolley is quicker, and massive sintering mineral aggregate is easy to bond on the fire bars of the sintering trolley.
Disclosure of Invention
The invention aims to: the method for controlling shutdown and startup of the sintering machine in the overhauling process is provided, so that the problem of the broken supply of the bedding materials after the overhauled sintering machine is started for a period of time is solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for controlling shutdown and startup of a sintering machine in the overhaul process, which is applied to the sintering machine, wherein the sintering machine comprises a sintering trolley, and a first bulk bin is arranged below the sintering trolley; the material is crushed by the crushing mechanism after being sintered by the sintering trolley, the crushed material enters the ring cooling trolley for cooling, and a second bulk material hopper is arranged below the ring cooling trolley; the materials in the first bulk material hopper and the second bulk material hopper enter a first vibrating screen, the materials leaked from the first vibrating screen enter a first screen chute, the materials not leaked from the first vibrating screen enter a second vibrating screen, a stop valve is arranged at an outlet of the second vibrating screen, and the materials leaked from the second vibrating screen enter a bottom bin through the second screen chute;
the method comprises the following steps:
s001, closing the first bulk bin;
s002, closing the second bulk bin;
s003, closing the stop valve;
s004, integrally closing the sintering machine;
s005, starting and finishing maintenance;
s006, starting the sintering machine;
s007, opening the stop valve;
s008, starting the first bulk material hopper;
s009, starting the second bulk material hopper;
and S010, starting the whole sintering machine.
As a preferable scheme of the control method for stopping and starting up the sintering machine in the overhauling process, the step S001 is executed 30-40 hours before the overhauling.
As a preferable scheme of the control method for stopping and starting up the sintering machine during the overhaul process, the step S002 is executed 20-30 hours before the overhaul.
As a preferable scheme of the control method for stopping and starting up the sintering machine in the overhauling process, the double-layer ash discharge valve and the discharge car of the second bulk material hopper are closed when the step S002 is executed.
As a preferable scheme of the control method of the shutdown and the startup in the overhaul process of the sintering machine, the step S003 is executed after the materials in the sintering pallet of the sintering machine are emptied.
As a preferable scheme of the control method for stopping and starting up the sintering machine in the overhauling process, after step S003 is executed, the material cooled by the ring cooling trolley can enter the second vibrating screen, and the material sieved by the second vibrating screen is stored in a second screen chute.
As a preferable scheme of the control method for stopping and starting up the sintering machine during the overhaul process, when the bottom material of the bottom material bin is lowered to the lower limit, step S007 is executed.
As a preferable scheme of the method for controlling the shutdown and startup of the sintering machine during the overhaul process, when step S007 is executed, the opening degree of the stop valve is controlled to be opened so as to control the speed of the material passing through the stop valve.
As a preferable scheme of the control method for stopping and starting up the sintering machine in the overhauling process, step S008 is executed after the materials in the second sieve chute are used up.
As a preferable scheme of the method for controlling the shutdown and startup of the sintering machine during the overhaul process, step S009 is performed after the materials in the first bulk bin are used up.
The invention has the beneficial effects that:
the invention provides a method for controlling shutdown and startup of a sintering machine in the process of overhauling the sintering machine. After the machine is started, the stop valve, the first bulk material hopper and the second bulk material hopper are gradually opened, so that the bedding materials entering the bottom material bin can be continuously and uninterruptedly supplied, and the problems that the yield is reduced and the like caused by the fact that the bedding materials are not paved at the bottom of the sintering trolley in the sintering process are avoided or reduced.
Drawings
FIG. 1 is a flow chart of a method for controlling shutdown and startup of a sintering machine during overhaul according to an embodiment of the present invention;
fig. 2 is a schematic view of a sintering machine in an embodiment of the present invention.
In the figure:
1. a proportioning bin; 2. a first mixer; 3. a second mixer; 4. a mixing bin; 5. sintering the trolley; 6. a crushing mechanism; 7. circularly cooling the trolley; 8. a flue; 9. a first bulk bin; 10. a second bulk bin; 11. a discharging vehicle; 12. a first vibrating screen; 13. a second vibrating screen; 14. a first sieve chute; 15. a second sieve chute; 16. a third vibrating screen; 17. a bottom bin; 18. a stop valve; 100. a first conveyor belt; 200. a second conveyor belt; 300. a third conveyor belt; 400. a fourth conveyor belt; 500. a fifth conveyor belt; 600. a sixth conveyor belt; 700. and a seventh conveyor belt.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Example one
As shown in fig. 1-2, the present embodiment provides a method for controlling shutdown and startup of a sintering machine during maintenance of the sintering machine, which is applied to the sintering machine, the sintering machine includes a proportioning bin 1, a sintering pallet 5, a ring cooling pallet 7 and a screening system, wherein the proportioning bin 1 has a plurality of sets of containers for respectively containing raw materials such as iron ore powder, flux ore powder, fuel powder, return fines, etc., and various ore powders are added in proportion. The method comprises the following steps that materials in a proportioning bin 1 enter a first mixer 2 through a first conveying belt 100, water is added into the first mixer 2 for mixing, then the materials enter a second mixer 3, water is added into the second mixer 3 for pelletizing, then the materials enter a mixing bin 4 through a second conveying belt 200, then the materials are loaded into a sintering trolley 5 of a sintering machine for ignition and sintering, an air inlet pipe of an exhaust fan is communicated with a flue 8, the flue 8 is communicated with an air box below the sintering trolley 5, and a first bulk bin 9 is arranged below the flue 8; the first bulk bin 9 is used for receiving and collecting bulk materials leaked in the sintering trolley 5. The sintered ore cake after sintering is crushed by the crushing mechanism 6 and then enters the ring cooling trolley 7 of the ring cooling machine for cooling, the cooling mode of the ring cooling machine is blast cooling, a second bulk material hopper 10 is arranged below the ring cooling trolley 7 of the ring cooling machine, and the second bulk material hopper 10 is used for receiving and collecting bulk materials in the ring cooling trolley 7. The screening system comprises a first 12, a second 13 and a third 16 vibrating screen; wherein, the aperture of the first vibrating screen 12 is 10 mm, the aperture of the second vibrating screen 13 is 16 mm, and the aperture of the third vibrating screen 16 is 5 mm. A first sieve chute 14 is arranged below the first vibrating sieve 12, a second sieve chute 15 is arranged below the second vibrating sieve 13, a stop valve 18 is arranged at the outlet of the second sieve chute 15, and a third sieve chute is arranged below the third vibrating sieve 16.
During operation, the material in the first bulk cargo fill 9 is unloaded to fourth conveyer belt 400 through third conveyer belt 300, and the material in the second bulk cargo fill 10 is unloaded to fourth conveyer belt 400 through dummy car 11, gets into the screening system through fourth conveyer belt 400, and the material is divided into five specifications by the screening system and is transported to proportioning bins 1, backing material storehouse 17 and blast furnace respectively. The material entering the first screen chute 14 is in the form of a block having an outer diameter of less than 10 mm. The material in the first sieve chute 14 falls to the third vibrating sieve 16, the material entering the third sieve chute is a block structure with an outer diameter of less than 5 mm, and the material with an outer diameter of less than 5 mm enters the proportioning bin 1 through the sixth conveyor 600. The material not dropped by the third vibrating screen 16, which has an outer diameter of 5 to 10 mm, is conveyed to the blast furnace by the seventh conveyor 700. The materials with the outer diameter exceeding 10 mm enter the second vibrating screen 13 from the first vibrating screen 12, the materials which enter the second screen chute 15 through the second vibrating screen 13 are of block structures with the outer diameter of 10-16 mm, the materials with the outer diameter of 10-16 mm preferentially enter the bottom material bin 17 through the fifth conveyor belt 500, and the materials can be conveyed to the blast furnace through the seventh conveyor belt 700 when the bottom material bin 17 is fully loaded. Material larger than 16 mm on the second vibrating screen 13 is sent to the blast furnace through a seventh conveyor 700. In this embodiment, optionally, the crushing mechanism 6 is a single-roll crusher, and the stop valve 18 is an electrohydraulic gate valve.
The method for controlling the shutdown and the startup of the sintering machine in the overhauling process comprises the following steps:
s001, closing the first bulk bin 9.
S002, closing the second bulk bin 10.
S003, the stopper valve 18 is closed.
And S004, closing the whole sintering machine.
And S005, starting maintenance and finishing maintenance.
And S006, starting the sintering machine.
S007, opening the stop valve 18.
And S008, starting the first bulk material hopper 9.
S009, starting the second bulk material hopper 10.
And S010, starting the whole sintering machine.
According to the method, a certain amount of materials are stored in the first bulk material hopper 9, the second bulk material hopper 10 and the second sieve chute 15 after the whole sintering machine is closed, and when the sintering machine is restarted, the bottom material in the bottom material bin 17 can be supplemented to the bottom material bin 17 through the materials stored in the second sieve chute 15, the second bulk material hopper 10 and the first bulk material hopper 9 in sequence after the bottom material is used up, so that the continuous supply of the bottom material entering the bottom material bin 17 is ensured, and the bottom material is always arranged in the bottom material bin 17. On the first aspect of the arrangement, the materials screened by the screening system are always paved at the bottom of the sintering trolley 5, the materials screened by the screening system become bedding materials, the size is 10-16 mm, the air permeability of the bottom of the sintering trolley 5 is increased, and the yield is improved; in the second aspect, the laying of the bedding materials plays a role in blocking, so that the burning loss of the furnace bars and the heat insulation pads in the sintering trolley 5 in the sintering process is reduced; in the third aspect, the situation that the sintering amount is reduced next time due to the fact that the sintered material is adhered to the bottom of the sintering trolley 5 and cannot be poured out is avoided, and the production efficiency is improved; in the fourth aspect, the condition that sticky materials drop in the transportation process of the sintering trolley 5 is avoided, and the workload of cleaning workers is reduced.
In this embodiment, optionally, step S001 is performed 30 to 40 hours before the maintenance. Preferably 36 hours. Of course, in other embodiments, step S001 may be performed 20 hours, 41 hours, or 50 hours before the inspection. The specific time can also be comprehensively determined according to the volume of the first bulk bin 9, the material leaking speed of the sintering trolley 5 of the sintering machine and the like. This arrangement allows the first scattering bin 9 to be fully loaded after step S004 is executed, i.e., after the completion of the shutdown of the sintering machine.
In step S002, the double-layer ash discharge valve of the first bulk material bin 9 is closed. After step S001 is performed, the materials leaked from the sintering pallet 5 of the sintering machine during the sintering process are stored in the first scattering hopper 9.
In this embodiment, optionally, step S002 is performed 20-30 hours before the maintenance. Preferably 24 hours. Of course, in other embodiments, step S002 may be performed 10 hours, 31 hours, or 40 hours before the service. The specific time can be comprehensively determined according to the volume of the second bulk bin 10, the material leakage speed of the annular cooling trolley 7 of the annular cooler and the like. This arrangement allows the second scattering bin 10 to be fully loaded after step S004 is executed, i.e., after the completion of the shutdown of the sintering machine.
Preferably, step S002 is performed by closing the double-layer dust discharge valve of the second bulk hopper 10 and the dump car 11. After step S002 is performed, the material leaked from the ring cooling trolley 7 of the ring cooling machine during the cooling process is stored in the second bulk bin 10.
In the present embodiment, step S003 may be optionally performed after the materials in the pallet 5 of the sintering machine are emptied. Preferably, step S003 is performed after all the materials in the pallet 5 of the sintering machine are emptied. Of course, in other embodiments, step S003 may be performed after the material in the partial sintering pallet 5 of the sintering machine is emptied. In addition, step S003 may be performed within 1 to 5 hours after the materials in all the pallet 5 of the sintering machine are emptied. Step S003 is preferably performed 2 hours, i.e., 2 hours after the materials in all the sintering carriages 5 of the sintering machine are emptied. The specific execution time can be comprehensively determined according to the volume of the second sieve chute 15, the volume and the number of the sintering trolley 5 and the ring cooling trolley 7 and the like. This arrangement makes the second sieve chute 15 fully loaded after step S004 is executed, i.e., after the shutdown of the sintering machine is completed.
After step S003, the cooled material on the ring cooling trolley 7 can enter the second vibrating screen 13, and the material sieved by the second vibrating screen 13 is stored in the second screen chute 15.
Alternatively, in step S005, the inspection and maintenance of each part of the sintering machine are completed. After execution of S006, the sintering machine starts to operate.
In the present embodiment, the step S007 is optionally executed when the bed charge of the charge bin 17 falls to the lower limit. Wherein after step S007, the material in the second sieve chute 15 can enter the bottom silo 17 through the fifth conveyor 500. This setting makes the bed charge material in the end feed bin 17 can in time obtain supplementing, avoids not laying the condition that the bed charge material directly passes through mixing bunker 4 addition material in sintering pallet 5.
In the present embodiment, it is preferable that the opening degree of the open stop valve 18 is controlled to control the speed of the material passing through the stop valve 18 when step S007 is performed. This setting can avoid the unloading speed too fast, surpasss the transport capacity of fifth conveyer belt 500, leads to the accident.
In this embodiment, optionally, step S008 is executed after the materials in the second sieve chute 15 are used up, wherein after the first bulk material bin 9 is started, the materials in the first bulk material bin 9 flow out, enter the first vibrating sieve 12 through the third conveyor 300 and the fourth conveyor 400, the materials which are not leaked by the first vibrating sieve 12 enter the second vibrating sieve 13, and the materials leaked by the second vibrating sieve 13 are transported to the backing material bin 17 through the fifth conveyor 500. This setting makes the bedding material in the end feed bin 17 can in time obtain supplementing after the material in second sieve chute 15 is used up, avoids not laying the bedding material in sintering pallet 5, directly through the condition that the mixing bunker 4 added the material.
Step S009 is executed after the materials in the first bulk bin 9 are used up, wherein after the second bulk bin 10 is started, the materials in the second bulk bin 10 flow out and enter the first vibrating screen 12 through the fourth conveyor belt 400, the materials which are not leaked from the first vibrating screen 12 enter the second vibrating screen 13, and the materials leaked from the second vibrating screen 13 are transported to the backing material bin 17 through the fifth conveyor belt 500. This setting makes the bedding material in the bottom feed bin 17 can in time obtain supplementing after the material in first bulk bin 9 is used up, avoids not laying the condition that the bedding material directly adds the material through mixing bunker 4 in sintering pallet 5.
In fig. 2, the line with an arrow indicates a material conveying path, and the arrow indicates a material conveying direction.
Example two
The embodiment provides a method for controlling shutdown and startup in the overhaul process of a sintering machine, which is basically the same as the first embodiment, except that after the step S007 is executed, the steps S008 and S009 are executed at the same time. At this time, the materials in the first bulk bin 9 and the second bulk bin 10 start to enter the screening system through the fourth conveyor belt 400, and the materials with the outer diameter of 10-16 mm preferentially enter the bottom bin 17 through the fifth conveyor belt 500.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A control method for shutdown and startup in the overhaul process of a sintering machine is applied to the sintering machine, the sintering machine comprises a sintering trolley (5), and a first bulk bin (9) is arranged below the sintering trolley (5); the materials are sintered by the sintering trolley (5) and then crushed by the crushing mechanism (6), the crushed materials enter the ring cooling trolley (7) for cooling, and a second bulk material hopper (10) is arranged below the ring cooling trolley (7); the materials in the first bulk bin (9) and the second bulk bin (10) enter a first vibrating screen (12), the materials which leak from the first vibrating screen (12) enter a first screen chute (14), the materials which do not leak from the first vibrating screen (12) enter a second vibrating screen (13), a stop valve (18) is arranged at an outlet of the second vibrating screen (13), and the materials which leak from the second vibrating screen (13) enter a bottom bin (17) through a second screen chute (15);
the method is characterized by comprising the following steps:
s001, closing the first bulk material hopper (9);
s002, closing the second bulk material hopper (10);
s003, closing the stop valve (18);
s004, integrally closing the sintering machine;
s005, starting and finishing maintenance;
s006, starting the sintering machine;
s007, opening the stop valve (18);
s008, starting the first bulk material hopper (9);
s009, starting the second bulk material hopper (10);
and S010, starting the whole sintering machine.
2. The method for controlling shutdown and startup in the overhaul process of a sintering machine according to claim 1, wherein step S001 is performed 30-40 hours before overhaul.
3. The method for controlling shutdown and startup in the overhaul process of a sintering machine according to claim 1, wherein step S002 is performed 20 to 30 hours before the overhaul.
4. The method for controlling shutdown and startup during overhaul of a sintering machine according to any one of claims 1 to 3, characterized in that step S002 is performed by closing the double-layer ash discharge valve and the discharge car (11) of the second bulk hopper (10).
5. The method for controlling shutdown and startup in the overhaul of a sintering machine according to claim 1, characterized in that step S003 is performed after the materials in the sintering pallet (5) of a sintering machine are emptied.
6. The method for controlling shutdown and startup in the overhaul process of the sintering machine according to claim 1 or 5, characterized in that after step S003 is executed, the cooled materials of the ring cooling trolley (7) can enter the second vibrating screen (13), and the screened materials of the second vibrating screen (13) are stored in a second screen chute (15).
7. The method for controlling shutdown and startup in the overhaul process of the sintering machine according to claim 1, wherein step S007 is executed when the bedding material in the bottom bin (17) falls to a lower limit.
8. The method for controlling shutdown and startup in overhaul of a sintering machine according to claim 1 or 7, wherein step S007 is performed by controlling the opening degree of the stop valve (18) to be opened so as to control the speed of the material passing through the stop valve (18).
9. The method for controlling shutdown and startup in the overhaul of a sintering machine according to claim 1, characterized in that step S008 is performed after the material in the second sieve chute (15) is used up.
10. The method for controlling shutdown and startup in overhaul of a sintering machine according to claim 9, wherein step S009 is performed after the materials in the first bulk bin (9) are used up.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114199A (en) * | 2013-03-12 | 2013-05-22 | 攀钢集团攀枝花钢钒有限公司 | Starting-up production method of sintering machine |
| CN107699684A (en) * | 2017-09-04 | 2018-02-16 | 鞍钢集团工程技术有限公司 | A kind of method of sintering machine start production |
| CN108253797A (en) * | 2018-03-28 | 2018-07-06 | 柳州钢铁股份有限公司 | Pallet grate-layer material grading distributing device and method |
| CN110749197A (en) * | 2019-09-26 | 2020-02-04 | 首钢京唐钢铁联合有限责任公司 | Sintering screening material distribution device and method |
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- 2021-01-26 CN CN202110103594.9A patent/CN112880423B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114199A (en) * | 2013-03-12 | 2013-05-22 | 攀钢集团攀枝花钢钒有限公司 | Starting-up production method of sintering machine |
| CN107699684A (en) * | 2017-09-04 | 2018-02-16 | 鞍钢集团工程技术有限公司 | A kind of method of sintering machine start production |
| CN108253797A (en) * | 2018-03-28 | 2018-07-06 | 柳州钢铁股份有限公司 | Pallet grate-layer material grading distributing device and method |
| CN110749197A (en) * | 2019-09-26 | 2020-02-04 | 首钢京唐钢铁联合有限责任公司 | Sintering screening material distribution device and method |
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