CN113416805A - Method and device system for flushing slag by blast furnace water - Google Patents
Method and device system for flushing slag by blast furnace water Download PDFInfo
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- CN113416805A CN113416805A CN202110829323.1A CN202110829323A CN113416805A CN 113416805 A CN113416805 A CN 113416805A CN 202110829323 A CN202110829323 A CN 202110829323A CN 113416805 A CN113416805 A CN 113416805A
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- slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
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- Manufacturing & Machinery (AREA)
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- Metallurgy (AREA)
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Abstract
The invention provides a method for flushing slag by blast furnace water and a device system thereof, wherein the device system comprises a reservoir, a main flushing slag pipe, a branch flushing slag pipe, a back flushing pipeline, a flushing slag runner, a crown block and at least 2 slag pools; a water outlet of the reservoir is sequentially connected in parallel with the slag flushing ditch and at least 2 slag pools through a slag flushing main pipe; a water inlet of the reservoir is sequentially connected in parallel with at least 2 slag pools through a blowback pipeline; the slag flushing branch pipe connects the slag flushing main pipe with a back flushing pipeline; the slag flushing ditch is sequentially connected with at least 2 slag pools; the overhead traveling crane is suspended over at least 2 slag ponds. The method comprises the steps of slag flushing, slag grabbing and back blowing which are sequentially carried out. By utilizing the device system provided by the invention, when a fault occurs in a respective pump device, an emergency scheme can be started, the normal operation of the slag flushing system is ensured, the loss caused by shutdown maintenance is avoided, the slag tank can be subjected to back flushing in time, the permeability of the slag tank filter material is improved, and the normal production of the blast furnace is ensured.
Description
Technical Field
The invention belongs to the technical field of steel smelting, and relates to a method for flushing slag by water, in particular to a method for flushing slag by water in a blast furnace and a device system thereof.
Background
At present, the blast furnace slag treatment method mainly comprises slag water quenching, dry slag discharging, slag flushing cotton or slag expansion production and the like, but the most common method is the slag water flushing treatment method.
The traditional slag flushing system has the following process flow: the slag flushing water is lifted to the head of the slag flushing chute in the workshop from the water storage tank by using a slag flushing pump, liquid slag is scattered by using slag flushing water jet to form slag particles, and the slag in the slag flushing chute is flushed into the slag bath. After the slag is precipitated in the slag pool, the slag is grabbed out by using a grab type gantry crane and then transported outwards. The slag flushing water collected in the slag flushing tank is pumped back to the reservoir by the upper tower pump after being filtered for cyclic utilization.
However, because the temperature and the humidity in the working environment are both high, the process flow generally has the problem that the slag flushing pump or the upper tower pump has frequent faults to cause the normal operation of the slag flushing system. In addition, the slag bath needs to be blowbacked in time to promote the permeability of slag bath filter material, if not blowbacked for a long time, the slag bath filter material will harden, and the water permeability worsens, can cause the pond not to ooze even when serious, makes the blast furnace can't slag tap, and then influences the normal production of blast furnace, need utilize manual work or mechanical clearance slag bath bottom plate knot thing, intensity of labour is big, and the danger coefficient is high.
Therefore, how to provide a method for flushing slag by blast furnace water and a device system thereof can start an emergency scheme when a single pump device fails to work, ensure the normal operation of a slag flushing system, avoid the loss caused by shutdown and maintenance, and can carry out back flushing on a slag tank in time, improve the permeability of a slag tank filter material, ensure the normal production of a blast furnace, and become the problem which needs to be solved urgently by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a method for flushing slag by using water in a blast furnace and a device system thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a blast furnace slag flushing device system, which comprises a water reservoir, a main slag flushing pipe, branch slag flushing pipes, a blowback pipe, a slag flushing channel, a crown block and at least 2 slag pools, such as 2, 3, 4 or 5, but not limited to the recited values, and other values not recited in the recited values are also applicable.
And the water outlet of the water storage tank is sequentially connected in parallel with the slag flushing ditch and at least 2 slag pools through the slag flushing main pipe.
And a water inlet of the reservoir is sequentially connected with at least 2 slag ponds in parallel through a blowback pipeline.
The slag flushing branch pipe connects the slag flushing main pipe with a back flushing pipeline.
The slag sluiceway is connected with at least 2 slag pools in sequence.
The overhead traveling crane is suspended over at least 2 slag ponds.
The slag flushing branch pipe is arranged, the slag flushing main pipe is connected with the back flushing pipeline by the slag flushing branch pipe, and the slag flushing branch pipe is started when a single pump device fails, so that the normal operation of a water flushing slag system is ensured, the loss caused by shutdown maintenance is avoided, the slag tank can be subjected to back flushing in time, the permeability of a filter material in the slag tank is improved, and the normal production of a blast furnace is ensured.
Preferably, at least 2 slag flushing pumps are uniformly distributed on the slag flushing main pipe, for example, 2, 3, 4 or 5 slag flushing pumps can be uniformly distributed on the slag flushing main pipe, but the slag flushing main pipe is not limited to the enumerated values, and other values in the numerical value range are also applicable.
Preferably, at least 2 upper tower pumps are uniformly distributed on the blowback pipeline, for example, 2, 3, 4 or 5 are possible, but not limited to the recited values, and other values not recited in the range of the recited values are also applicable.
Preferably, 3 slag flushing pumps are uniformly distributed on the slag flushing main pipe, and a first slag flushing pump, a second slag flushing pump and a third slag flushing pump are sequentially arranged in the slag flushing water flow direction.
Preferably, the connecting point of the flushing slag branch pipe and the flushing slag main pipe is arranged between the first flushing slag pump and the second flushing slag pump.
Preferably, a first valve is further arranged between the connection point of the flushing slag branch pipe and the flushing slag main pipe and the second flushing slag pump.
Preferably, the slag flushing branch pipe is also provided with a second valve.
In the invention, the first slag flushing pump is a standby pump, when the second slag flushing pump and/or the third slag flushing pump fails, the first slag flushing pump is started, the first valve is closed, the second valve is started, slag flushing water in the water storage tank is conveyed to the slag pool through the slag flushing branch pipe, and slag discharged from the blast furnace is flushed; when the upper tower pump has faults, the first slag flushing pump, the second slag flushing pump, the third slag flushing pump, the first valve and the second valve are opened, slag discharged from the blast furnace is flushed, and the slag tank is subjected to back flushing, so that hardening of a slag tank filter material is prevented.
Preferably, the at least 2 slag flushing pumps are each independently a centrifugal pump or a vortex pump.
Preferably, the at least 2 upper tower pumps are each independently a centrifugal pump or a vortex pump.
Preferably, the first valve is a ball valve or a stop valve.
Preferably, the second valve is a ball valve or a stop valve.
In a second aspect, the invention provides a method for flushing slag in a blast furnace by using the device system according to the first aspect, wherein the method comprises flushing slag, grabbing slag and back flushing sequentially.
Preferably, the slag flushing comprises the following specific processes: slag flushing water of the reservoir is conveyed to the slag flushing ditch and at least 2 slag pools through the slag flushing main pipe, and the slag discharged from the blast furnace is flushed.
Preferably, the slag grabbing specific process is as follows: and (4) sequentially grabbing the granulated slag in at least 2 slag pools by using a crown block.
Preferably, the specific process of the back flushing is as follows: and conveying the filtered slag flushing water in at least 2 slag pools to a reservoir through a back flushing pipeline, and then recycling.
Preferably, when the pump device on the main flushing slag pipe fails, the flushing slag branch pipe is started to flush the slag discharged from the blast furnace.
Preferably, when the pump device on the back flushing pipeline breaks down, the slag flushing branch pipe is started to carry out back flushing on the slag bath.
Compared with the prior art, the invention has the following beneficial effects:
the slag flushing branch pipe is arranged, the slag flushing main pipe is connected with the back flushing pipeline by the slag flushing branch pipe, and the slag flushing branch pipe is started when a single pump device fails, so that the normal operation of a water flushing slag system is ensured, the loss caused by shutdown maintenance is avoided, the slag tank can be subjected to back flushing in time, the permeability of a filter material in the slag tank is improved, and the normal production of a blast furnace is ensured.
Drawings
FIG. 1 is a schematic view of a blast furnace slag flushing device system provided in example 1;
FIG. 2 is a schematic view of a system of a blast furnace slag flushing device provided in example 2;
FIG. 3 is a schematic view of the blast furnace slag flushing device system provided in comparative example 1.
Wherein: 10-a water reservoir; 20-slag flushing main pipe; 30-flushing slag branch pipe; 40-a blowback pipeline; 50-slag flushing; 61-first slag pool; 62-second slag pool; 63-third slag pool; 71-a slag flushing pump; 72-second slag flushing pump; 73-third slag flushing pump; 81-first tower pump; 82-second upper column pump; 83-third upper tower pump; 91-valve number one; 92-valve number two.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides a device system for flushing slag by using blast furnace water, as shown in fig. 1, the device system comprises a water reservoir 10, a main slag flushing pipe 20, a branch slag flushing pipe 30, a back flushing pipeline 40, a slag flushing ditch 50, a crown block (not shown in the figure) and 3 slag pools, namely a first slag pool 61, a second slag pool 62 and a third slag pool 63 in sequence; the water outlet of the water storage tank 10 is sequentially connected with the slag flushing ditch 50 and the 3 slag pools in parallel through the slag flushing main pipe 20; a water inlet of the water storage tank 10 is connected in parallel with the 3 slag pools in sequence through a blowback pipeline 40; the slag flushing branch pipe 30 connects the slag flushing main pipe 20 with a back flushing pipeline 40; the slag sluiceways 50 are sequentially connected with 3 slag pools; the overhead traveling crane is suspended over the 3 slag pools.
In this embodiment, 3 slag flushing pumps are uniformly distributed on the main slag flushing pipe 20, and the first slag flushing pump 71, the second slag flushing pump 72 and the third slag flushing pump 73 are sequentially arranged in the direction of slag flushing water flow; 3 upper tower pumps are uniformly distributed on the back flushing pipeline 40, and a first upper tower pump 81, a second upper tower pump 82 and a third upper tower pump 83 are sequentially arranged in the back flushing water flow direction; the connecting point of the flushing slag branch pipe 30 and the flushing slag main pipe 20 is arranged between the first flushing slag pump 71 and the second flushing slag pump 72; a first valve 91 is further arranged between the connection point of the flushing slag branch pipe 30 and the flushing slag main pipe 20 and the second flushing slag pump 72, and a second valve 92 is further arranged on the flushing slag branch pipe.
In this embodiment, 3 flushing cinder pumps are respectively independent centrifugal pumps, 3 upper tower pumps are respectively independent vortex pumps, and first valve 91 and second valve 92 are respectively independent stop valves.
Example 2
The embodiment provides a device system for flushing slag by using blast furnace water, as shown in fig. 2, the device system comprises a water reservoir 10, a main slag flushing pipe 20, a branch slag flushing pipe 30, a back flushing pipe 40, a slag flushing ditch 50, a crown block (not shown in the figure) and 2 slag pools, namely a first slag pool 61 and a second slag pool 62 in sequence; the water outlet of the water storage tank 10 is sequentially connected with the slag flushing ditch 50 and 2 slag pools in parallel through the slag flushing main pipe 20; a water inlet of the water storage tank 10 is connected in parallel with the 2 slag pools in sequence through a blowback pipeline 40; the slag flushing branch pipe 30 connects the slag flushing main pipe 20 with a back flushing pipeline 40; the slag sluiceway 50 is sequentially connected with 2 slag pools; the overhead traveling crane is suspended over the 2 slag pools.
In this embodiment, 2 slag flushing pumps are uniformly distributed on the slag flushing main pipe 20, and a first slag flushing pump 71 and a second slag flushing pump 72 are sequentially arranged in the direction of slag flushing water flow; 2 upper tower pumps are uniformly distributed on the back flushing pipeline 40, and are a first upper tower pump 81 and a second upper tower pump 82 in sequence according to the back flushing water flow direction; the connecting point of the flushing slag branch pipe 30 and the flushing slag main pipe 20 is arranged between the first flushing slag pump 71 and the second flushing slag pump 72; a first valve 91 is further arranged between the connection point of the flushing slag branch pipe 30 and the flushing slag main pipe 20 and the second flushing slag pump 72, and a second valve 92 is further arranged on the flushing slag branch pipe.
In this embodiment, the 2 slag flushing pumps are respectively and independently vortex pumps, the 2 upper tower pumps are respectively and independently centrifugal pumps, and the first valve 91 and the second valve 92 are respectively and independently ball valves.
Comparative example 1
The comparative example provides a device system for flushing slag by blast furnace water, and as shown in fig. 3, the device system comprises a water reservoir 10, a main slag flushing pipe 20, a back flushing pipeline 40, a slag flushing ditch 50, a crown block (not shown in the figure) and 3 slag pools, namely a first slag pool 61, a second slag pool 62 and a third slag pool 63 in sequence; the water outlet of the water storage tank 10 is sequentially connected with the slag flushing ditch 50 and the 3 slag pools in parallel through the slag flushing main pipe 20; a water inlet of the water storage tank 10 is connected in parallel with the 3 slag pools in sequence through a blowback pipeline 40; the slag sluiceways 50 are sequentially connected with 3 slag pools; the overhead traveling crane is suspended over the 3 slag pools.
In the comparative example, 3 slag flushing pumps are uniformly distributed on the slag flushing main pipe 20, and the slag flushing main pipe is provided with a first slag flushing pump 71, a second slag flushing pump 72 and a third slag flushing pump 73 in sequence according to the direction of slag flushing water flow; 3 tower feeding pumps are uniformly distributed on the blowback pipeline 40 and sequentially comprise a first tower feeding pump 81, a second tower feeding pump 82 and a third tower feeding pump 83 according to the blowback water flow direction.
In the comparative example, the 3 slag flushing pumps are respectively and independently centrifugal pumps, and the 3 upper tower pumps are respectively and independently vortex pumps.
Application example 1
The application example uses the device system provided by the embodiment 1 to carry out blast furnace slag flushing, and the specific method comprises the following steps:
(1) slag flushing: starting a second slag flushing pump 72 and a third slag flushing pump 73, conveying slag flushing water in the water storage tank 10 to the slag flushing ditch 50 and 3 slag pools through the main slag flushing pipe 20, and flushing blast furnace slag;
(2) slag grabbing: sequentially grabbing the granulated slag in the 3 slag pools by using a crown block;
(3) back flushing: and starting the first upper tower pump 81, the second upper tower pump 82 and the third upper tower pump 83, conveying the slag flushing water filtered in the 3 slag pools to the water reservoir 10 through the blowback pipeline 40, and then recycling.
The first slag flushing pump 71 is a standby pump, when the second slag flushing pump 72 or the third slag flushing pump 73 on the slag flushing main pipe 20 fails, the first slag flushing pump 71 is started, the first valve 91 is closed, the second valve 92 is opened, and slag flushing water in the water storage tank 10 is conveyed to 3 slag pools through the slag flushing branch pipes 30 to flush slag discharged from the blast furnace; when the first upper tower pump 81, the second upper tower pump 82 and the third upper tower pump 83 on the back flushing pipeline 40 all have faults, the first slag flushing pump 71, the second slag flushing pump 72, the third slag flushing pump 73, the first valve 91 and the second valve 92 are started, and back flushing is carried out on 3 slag ponds while flushing blast furnace slag, so that hardening of slag pond filter materials is prevented.
Application example 2
The device system provided by the application example 2 is applied to blast furnace slag flushing, and the specific method comprises the following steps:
(1) slag flushing: starting a second slag flushing pump 72, conveying slag flushing water in the water storage tank 10 to the slag flushing ditch 50 and 2 slag pools through the slag flushing main pipe 20, and flushing the slag discharged from the blast furnace;
(2) slag grabbing: sequentially grabbing the granulated slag in the 2 slag pools by using a crown block;
(3) back flushing: and (3) starting the first upper tower pump 81 and the second upper tower pump 82, conveying the slag flushing water filtered in the 2 slag pools to the water reservoir 10 through the blowback pipeline 40, and then recycling.
Wherein, the first slag flushing pump 71 is a standby pump, when the second slag flushing pump 72 on the slag flushing main pipe 20 breaks down, the first slag flushing pump 71 is started, the first valve 91 is closed, the second valve 92 is opened, the slag flushing water of the water storage tank 10 is conveyed to 2 slag pools through the slag flushing branch pipes 30, and the slag discharged from the blast furnace is flushed; when the first upper tower pump 81 and the second upper tower pump 82 on the back flushing pipeline 40 both break down, the first slag flushing pump 71, the second slag flushing pump 72, the first valve 91 and the second valve 92 are opened, so that back flushing is performed on 2 slag ponds while flushing the slag discharged from the blast furnace, and hardening of the slag pond filter material is prevented.
Comparative application example 1
The comparative application example uses the device system provided in comparative example 1 to carry out blast furnace slag flushing, and the specific method comprises the following steps:
(1) slag flushing: starting a second slag flushing pump 72 and a third slag flushing pump 73, conveying slag flushing water in the water storage tank 10 to the slag flushing ditch 50 and 3 slag pools through the main slag flushing pipe 20, and flushing blast furnace slag;
(2) slag grabbing: sequentially grabbing the granulated slag in the 3 slag pools by using a crown block;
(3) back flushing: and starting the first upper tower pump 81, the second upper tower pump 82 and the third upper tower pump 83, conveying the slag flushing water filtered in the 3 slag pools to the water reservoir 10 through the blowback pipeline 40, and then recycling.
Wherein, the first slag flushing pump 71 is a standby pump, and when the second slag flushing pump 72 or the third slag flushing pump 73 on the slag flushing main pipe 20 fails, the first slag flushing pump 71 is started to flush the slag discharged from the blast furnace; but when first tower pump 81, second tower pump 82 and third tower pump 83 on blowback pipeline 40 all broke down, this device system can't carry out the blowback to the slag bath, if long-time operation, the slag bath filter material will harden, and the water permeability worsens, can cause the pond to not seep water even when serious for the unable slag tapping of blast furnace, and then influence the normal production of blast furnace, need utilize manual work or mechanical clearance slag bath bottom board knot thing, and intensity of labour is big, and the danger coefficient is high.
Therefore, the slag flushing branch pipe is arranged, the slag flushing main pipe is connected with the back flushing pipeline by the slag flushing branch pipe, and the slag flushing branch pipe is started when a single pump device fails, so that the normal operation of a water slag flushing system is ensured, the loss caused by shutdown maintenance is avoided, the slag tank can be subjected to back flushing in time, the permeability of a slag tank filter material is improved, and the normal production of a blast furnace is ensured.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. A blast furnace water slag flushing device system is characterized by comprising a water storage tank, a slag flushing main pipe, slag flushing branch pipes, a back flushing pipeline, a slag flushing ditch, a crown block and at least 2 slag pools;
a water outlet of the reservoir is sequentially connected in parallel with the slag flushing ditch and at least 2 slag pools through a slag flushing main pipe;
a water inlet of the reservoir is sequentially connected in parallel with at least 2 slag pools through a blowback pipeline;
the slag flushing branch pipe connects the slag flushing main pipe with a back flushing pipeline;
the slag flushing ditch is sequentially connected with at least 2 slag pools;
the overhead traveling crane is suspended over at least 2 slag ponds.
2. The device system of claim 1, wherein at least 2 slag flushing pumps are uniformly distributed on the slag flushing main pipe;
preferably, at least 2 upper tower pumps are uniformly distributed on the blowback pipeline.
3. The device system of claim 2, wherein 3 slag flushing pumps are uniformly distributed on the slag flushing main pipe, and the slag flushing main pipe comprises a first slag flushing pump, a second slag flushing pump and a third slag flushing pump in sequence according to the direction of slag flushing water flow.
4. The apparatus system of claim 3, wherein the connection point of the flushing slag branch pipe and the flushing slag main pipe is arranged between the first flushing slag pump and the second flushing slag pump.
5. The device system of claim 4, wherein a first valve is further arranged between the connection point of the flushing slag branch pipe and the flushing slag main pipe and the second flushing slag pump;
preferably, the slag flushing branch pipe is also provided with a second valve.
6. The plant system of claim 2, wherein the at least 2 slag pumps are each independently a centrifugal pump or a vortex pump;
preferably, the at least 2 upper tower pumps are each independently a centrifugal pump or a vortex pump.
7. The device system of claim 5, wherein the first valve is a ball valve or a stop valve;
preferably, the second valve is a ball valve or a stop valve.
8. A method for flushing slag with blast furnace water by using the device system as claimed in any one of claims 1-7, characterized in that the method comprises flushing slag, grabbing slag and back flushing in sequence.
9. The method according to claim 8, wherein the specific process of slag flushing is as follows: slag flushing water of the reservoir is conveyed to a slag flushing ditch and at least 2 slag pools through a slag flushing main pipe, and the slag discharged from the blast furnace is flushed;
preferably, the slag grabbing specific process is as follows: sequentially grabbing the granulated slag in at least 2 slag pools by using a crown block;
preferably, the specific process of the back flushing is as follows: and conveying the filtered slag flushing water in at least 2 slag pools to a reservoir through a back flushing pipeline, and then recycling.
10. The method according to claim 9, characterized in that when the pump device on the main flushing slag pipe fails, the flushing slag branch pipe is started to flush the blast furnace slag;
preferably, when the pump device on the back flushing pipeline breaks down, the slag flushing branch pipe is started to carry out back flushing on the slag bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110829323.1A CN113416805A (en) | 2021-07-22 | 2021-07-22 | Method and device system for flushing slag by blast furnace water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110829323.1A CN113416805A (en) | 2021-07-22 | 2021-07-22 | Method and device system for flushing slag by blast furnace water |
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| CN113416805A true CN113416805A (en) | 2021-09-21 |
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| CN202110829323.1A Pending CN113416805A (en) | 2021-07-22 | 2021-07-22 | Method and device system for flushing slag by blast furnace water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114053768A (en) * | 2021-11-24 | 2022-02-18 | 中冶京诚工程技术有限公司 | Method for preventing hardening of filter material of blast furnace water slag bottom filtering system |
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2021
- 2021-07-22 CN CN202110829323.1A patent/CN113416805A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114053768A (en) * | 2021-11-24 | 2022-02-18 | 中冶京诚工程技术有限公司 | Method for preventing hardening of filter material of blast furnace water slag bottom filtering system |
| CN114053768B (en) * | 2021-11-24 | 2022-12-20 | 中冶京诚工程技术有限公司 | Method for preventing hardening of filter material of blast furnace water slag bottom filtering system |
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