CN114908200A

CN114908200A - Blast furnace water quenching slag steam treatment device and slag steam treatment process

Info

Publication number: CN114908200A
Application number: CN202210572202.8A
Authority: CN
Inventors: 陈生利; 廖经文; 包锋; 刘立广; 匡洪锋; 冯国亮; 邱平; 蓝兴升; 曹旭; 丁时明
Original assignee: SGIS Songshan Co Ltd
Current assignee: SGIS Songshan Co Ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-08-16

Abstract

The invention belongs to the technical field of blast furnace slag treatment, and discloses a blast furnace water quenching slag steam treatment device and a slag steam treatment process, wherein the device comprises a cooling component, a steam collecting component and a steam conveying component; one end of the spray water pipe is communicated with the cooling water tank, the other end of the spray water pipe extends into the exhaust chimney, water mist can be sprayed into the spray water pipe, the temperature measuring mechanism detects the temperature of steam in the exhaust chimney, and the spray water pipe is in communication connection with the temperature measuring mechanism; the closed cover plate can be movably covered above any slag pool, the steam transition pipe for collecting steam in the slag pool is arranged on the closed cover plate, and one end of the steam transition pipe is communicated with the slag pool; one end of the steam conveying component is communicated with the steam transition pipe, and the other end of the steam conveying component extends into the exhaust chimney. The blast furnace water quenching slag steam treatment device can condense and recover steam of water quenching slag, avoid environmental pollution and personnel health injury caused by air discharge of the steam, and save water resources; the slag steam treatment process adopts the device, can carry out environment-friendly recovery on slag steam, protects the environment and saves resources.

Description

Blast furnace water quenching slag steam treatment device and slag steam treatment process

Technical Field

The invention relates to the technical field of blast furnace slag treatment, in particular to a blast furnace water quenching slag steam treatment device and a slag steam treatment process.

Background

In order to save energy, most of furnace slag generated in the production process of the existing blast furnace adopts a water quenching slag process, water slag after slag-water separation is used for the fields of cement manufacture, paving and the like, and the separated water is recycled. The water quenching process of blast furnace slag comprises a plurality of processes, and is characterized in that high-temperature slag (about 1500 ℃) meets high-speed and high-pressure water and then is quenched into small-particle water slag, and in the water quenching process, the high-temperature slag is condensed to release energy and generate a large amount of high-temperature steam. At present, a small number of enterprises in the industry collect steam for heating, but the steam of the water granulated slag contains a large amount of harmful elements such as sulfide and chloride, and the harmful elements generate gaseous toxic substances when meeting water at high temperature, so that heating system equipment is easy to corrode, and the equipment maintenance cost is increased; moreover, the blast furnace water slag system of most enterprises does not consider the steam treatment technology at the beginning of the design, and the later-stage modification consumes manpower and material resources. Therefore, a large number of enterprises discharge steam to the air, a large number of toxic and harmful substances in the steam damage the environment greatly, a large number of harmful elements such as sulfides damage the bodies of regional operating personnel greatly, and fine particles contained in the steam seriously corrode buildings around the region, parked vehicles and the like after falling.

Moreover, a lot of energy is wasted by discharging steam to the air, and according to statistics, slag produced by the blast furnace with the annual output of 100 ten thousand tons needs to be quenched, the water consumption is 25-30 ten thousand tons every year, and the water resource is greatly wasted.

Disclosure of Invention

An object of the present invention is to provide a blast furnace water quenching slag steam treatment device, which can condense and recover steam generated by water quenching slag, avoid environmental pollution and personnel health injury caused by air discharge of steam, and save water resources.

In order to achieve the purpose, the invention adopts the following technical scheme:

a blast furnace water quenching slag steam treatment device comprises:

the cooling assembly is arranged on an exhaust chimney of the slag flushing tank and comprises a cooling water tank, a plurality of spray water pipes and a temperature measuring mechanism, one end of each spray water pipe is communicated with the cooling water tank, the other end of each spray water pipe extends into the exhaust chimney, the spray water pipes are configured to spray water mist into the slag flushing tank, the temperature measuring mechanism is configured to detect the temperature of steam in the exhaust chimney, and the temperature measuring mechanism is in communication connection with the spray water pipes;

the steam collecting assembly comprises a closed cover plate and a steam transition pipe, the closed cover plate can be movably covered above any slag pool, the steam transition pipe is arranged on the closed cover plate, one end of the steam transition pipe is communicated with the slag pool, and the steam transition pipe is configured to collect the steam in the slag pool; and

one end of the steam conveying assembly is communicated with one end, far away from the closed cover plate, of the steam transition pipe, the other end of the steam conveying assembly extends into the exhaust chimney, and the steam conveying assembly is configured to convey the steam.

As a preferred structure of the present invention, the spray water pipe is provided with a control valve configured to control the water output of the spray water pipe, and the control valve is in communication connection with the temperature measuring mechanism.

As a preferable structure of the invention, the cooling assembly is further provided with a compressed air pipe, one end of the compressed air pipe is communicated with an external high-pressure air source, and the other end of the compressed air pipe is communicated with the spray water pipe.

As a preferable structure of the present invention, a water level measuring mechanism configured to measure an amount of water in the cooling water tank is further provided in the cooling water tank.

As a preferred structure of the present invention, the vapor delivery assembly includes:

the steam guide pipe is obliquely arranged, and the high end of the steam guide pipe extends into the exhaust chimney;

the horizontal guide pipe is communicated with the lower end of the steam guide pipe, the horizontal guide pipe is provided with a plurality of sealing pipes, the sealing pipes correspond to the slag pools respectively, and the sealing pipes can be communicated with the steam transition pipe.

As a preferable structure of the invention, the steam transition pipe extends in parallel along the length direction of the closed cover plate, a plurality of guide pipes are arranged on the closed cover plate at intervals along the length direction of the closed cover plate, one end of each guide pipe is communicated with the steam transition pipe, and the other end of each guide pipe is communicated with the slag bath.

As a preferable structure of the invention, the steam collection assembly further comprises a slag bath communicating pipe, one end of the slag bath communicating pipe is arranged at the end part of the closed cover plate to be communicated with the slag bath, and the other end of the slag bath communicating pipe is communicated with the steam transition pipe.

The invention also aims to provide a slag steam treatment process, which can carry out environment-friendly recovery on slag steam, thereby protecting the environment and saving resources.

the blast furnace water quenching slag steam treatment process applying the blast furnace water quenching slag steam treatment device comprises the following steps of:

step S1, opening a blast furnace slag iron signal, manually selecting a slag pool, and moving a sealing cover plate to the position above the selected slag pool for sealing;

step S2, starting slag flushing water, wherein the slag flushing water enters a slag flushing tank to carry out water quenching on blast furnace slag, and water slag generated by the water quenching and the slag flushing water flow into the slag pool;

step S3, steam generated by the granulated slag enters an exhaust chimney of the slag flushing tank along a steam collecting assembly and a steam conveying assembly, and when a temperature measuring mechanism detects that the temperature of the steam is higher than a first set temperature, a water mist is sprayed into the slag flushing tank by a spray water pipe;

and step S4, shutting off the blast furnace slag iron signal, reducing the steam generated by the water granulated slag, and shutting off the spray water pipe when the temperature measuring mechanism detects that the temperature of the steam is reduced to a second set temperature.

As a preferred embodiment of the present invention, in step S3, the method further includes the following steps: and adjusting the water yield of the spray water pipe according to the temperature of the steam, wherein the opening of the control valve of the spray water pipe is increased by 10% every time when the temperature of the steam is increased by 5 ℃.

As a preferred embodiment of the present invention, before the step S1, the method further comprises the following steps: and starting a water pump to guide cooling water into a cooling water tank of the cooling assembly within 5 minutes before the blast furnace slag iron signal is turned on.

The invention has the beneficial effects that:

according to the blast furnace water quenching slag steam treatment device provided by the invention, the sealing cover plate can be movably covered above any slag pool, steam generated by water quenching slag is collected by the sealing cover plate cage and is output to the slag pool through the steam transition pipe, the steam conveying assembly guides the steam to enter the exhaust chimney, water mist sprayed by the spray water pipe condenses and liquefies the steam, most of the steam falls into the slag flushing tank after being condensed and can be recycled as slag flushing water and is not discharged through the steam discharge port, so that serious corrosion to buildings around the area, parked vehicles and the like after harmful particles in the steam discharged to the air fall off is avoided, a large amount of water resources are saved, and the water consumption of water quenching is reduced;

according to the slag steam treatment process provided by the invention, steam generated by slag water quenching can be rapidly cooled, so that environmental pollution and personnel health injury caused by air discharge are avoided, the consumption of slag flushing water of the blast furnace is greatly reduced, and energy conservation and production cost reduction are realized.

Drawings

FIG. 1 is a first schematic structural diagram of a blast furnace water quenching slag steam treatment device provided by a first embodiment of the invention;

fig. 2 is a schematic structural diagram of a blast furnace water quenching slag steam processing device according to the first embodiment of the invention.

In the figure:

1. a cooling assembly; 11. a cooling water tank; 111. a water level measuring mechanism; 12. a spray water pipe; 121. a control valve; 13. a temperature measuring mechanism; 14. a compressed air pipe; 2. a vapor collection assembly; 21. closing the cover plate; 211. a guide tube; 22. a steam transition pipe; 23. a slag pool communicating pipe; 3. a steam delivery assembly; 31. a steam conduit; 32. a horizontal conduit; 321. a sealing tube;

100. a slag flushing tank; 101. an exhaust stack; 102. a steam outlet; 103. a slag-water mixing tank; 200. and (4) a slag pool.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating 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 embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

Example one

As shown in fig. 1 and 2, an embodiment of the present invention provides a steam treatment apparatus for water-quenched blast furnace slag, which is used for treating steam generated in a water-quenching process of blast furnace slag. The blast furnace water quenching slag steam treatment device comprises a cooling assembly 1, a steam collecting assembly 2 and a steam conveying assembly 3. The cooling assembly 1 is arranged on an exhaust chimney 101 of the slag flushing tank 100, and a steam outlet 102 above the exhaust chimney 101 is used for discharging steam. The cooling assembly 1 comprises a cooling water tank 11, a plurality of spray water pipes 12 and a temperature measuring mechanism 13; in the first embodiment, the volume of the cooling water tank 11 is 10m ³ The water storage capacity is not more than 10 tons; the cooling water in the cooling water tank 11 needs to be cooled by a cooling tower (not shown in the figure) to ensure that the water temperature is lower than 30 ℃. One end of the spray water pipe 12 is communicated with the cooling water tank 11, and the other end extends into the exhaust chimney101, the water spray pipes 12 are configured to spray water into the slag flushing tank 100, in the first embodiment, the cooling module 1 is provided with four water spray pipes 12, the water spray pipes 12 are installed at intervals of 90 degrees around the lower part of the cooling water tank 11, and the diameter of the water spray pipes 12 is 50 mm. The temperature measuring means 13 is configured to detect the temperature of the steam in the exhaust stack 101, the temperature measuring means 13 is connected to the spray pipe 12 in communication, and the temperature measuring means 13 determines the opening and closing of the spray pipe 12 based on the detected temperature of the steam, thereby efficiently and effectively condensing the steam. The temperature measuring mechanism 13 may be a temperature thermocouple or other temperature sensor, and the embodiment is not limited herein.

The steam collection assembly 2 comprises a closed cover plate 21 and a steam transition pipe 22, wherein the closed cover plate 21 can be movably covered above any slag bath 200, and the closed cover plate 21 is arched and can contain and collect more steam. The steam collection assembly 2 further comprises a conveyor belt mechanism (not shown) to which the closure plate 21 is connected, and a drive motor for driving the conveyor belt mechanism to move the closure plate 21 over a selected slag bath 200. The blast furnace is usually provided with a plurality of slag pools 200, because the plurality of slag pools 200 can not be used simultaneously, and the use requirement can be met by moving the movable closed cover plate 21 to the position above the selected slag pool 200. The above-mentioned transmission structure is only an example, and in other embodiments, a transmission mechanism such as a rack and pinion may be adopted, which is not limited to this embodiment. The steam transition pipe 22 is arranged on the closed cover plate 21, one end of the steam transition pipe is communicated with the slag pool 200, and the steam transition pipe 22 is configured to collect steam in the slag pool 200; steam generated by the water quenched slag is collected by the closed cover plate 21 and is output to the slag bath 200 through the steam transition pipe 22. One end of the steam conveying component 3 is communicated with one end of the steam transition pipe 22 far away from the closed cover plate 21, the other end of the steam conveying component extends into the exhaust chimney 101, the steam conveying component 3 is configured to convey steam, the steam is guided to enter the exhaust chimney 101, water mist sprayed out of the spray water pipe 12 enables the steam to be condensed and liquefied, most of the steam falls into the slag flushing tank 100 after being condensed, the steam conveying component can be recycled as slag flushing water and is not discharged through a steam outlet 102 any more, serious corrosion to surrounding buildings in the area, stopped vehicles and the like after harmful particles fall in the steam discharged to the air is avoided, a large amount of water resources are saved, and the water consumption of water quenching is reduced.

Preferably, the spray water pipe 12 is provided with a control valve 121, the control valve 121 is configured to control the water output of the spray water pipe 12, and the control valve 121 is in communication connection with the temperature measuring mechanism 13. The aperture of the control valve 121 can be adjusted at will, and the water spraying amount of the spraying water pipe 12 is controlled through the control valve 121 according to the steam temperature detected by the temperature measuring mechanism 13, so that the environment is protected, the water is saved, and the steam can be effectively condensed.

Preferably, the cooling module 1 is further provided with a compressed air pipe 14, one end of the compressed air pipe 14 is communicated with an external high-pressure air source, and the other end is communicated with the spray water pipe 12. The end of the spray water pipe 12 adopts a porous nozzle structure, the compressed air pipe 14 introduces compressed air through an external high-pressure air source to atomize the cooling water, and the cooling water is sprayed out through the porous nozzle of the spray water pipe 12, so that the condensation effect of water mist on steam is better.

Preferably, a water level measuring mechanism 111 is further provided in the cooling water tank 11, and the water level measuring mechanism 111 is configured to measure the amount of water in the cooling water tank 11. The water level measuring mechanism 111 controls the water amount in the cooling water tank 11 to meet the use requirement and not to be excessive, so that the deformation caused by the excessive water amount in the cooling water tank 11 causing the excessive gravity borne by the exhaust chimney 101 can be avoided.

Preferably, the steam delivery assembly 3 comprises a steam duct 31 and a horizontal duct 32; the steam guide pipe 31 is obliquely arranged, the high end of the steam guide pipe 31 extends into the exhaust chimney 101, the preferred inclination angle of the steam guide pipe 31 is 120-145 degrees, not only can the gravity applied to the exhaust chimney 101 be reduced, but also the angle is beneficial to the steam to enter the exhaust chimney 101, and the steam is prevented from washing the pipelines in the exhaust chimney 101. The horizontal conduit 32 is communicated with the lower end of the steam conduit 31, the horizontal conduit 32 is provided with a plurality of sealing pipes 321, the plurality of sealing pipes 321 correspond to the plurality of slag pools 200 respectively, and the sealing pipes 321 can be communicated with the steam transition pipe 22. When different slag pools 200 are used, the steam transition pipe 22 above the slag pool 200 is communicated with the sealing pipe 321 corresponding to the slag pool 200, so that steam can be conveyed, the operation is simple, and the fast switching can be realized.

Preferably, the steam transition pipe 22 extends in parallel along the length direction of the closed cover plate 21, the closed cover plate 21 is further provided with a plurality of guide pipes 211, the guide pipes 211 are arranged at intervals along the length direction of the closed cover plate 21, one end of each guide pipe 211 is communicated with the steam transition pipe 22, and the other end of each guide pipe 211 is communicated with the slag bath 200. The number and the aperture of the guide tubes 211 may be designed according to the actual working condition, and the embodiment is not limited herein. The axial diameter of the guide pipe 211 is perpendicular to the axial diameter of the steam transition pipe 22, so that the steam flow speed in the slag bath 200 is guided to be higher.

Preferably, the steam collecting assembly 2 further includes a slag bath communicating pipe 23, one end of the slag bath communicating pipe 23 is disposed at the end of the closed cover plate 21 to communicate with the slag bath 200, and the other end is communicated with the steam transition pipe 22. Preferably, the slag bath communicating pipe 23 is an arc-shaped pipe, so that the steam at the end of the slag bath 200 can be conveniently guided into the steam transition pipe 22, and the steam in the slag bath 200 can be more thoroughly conveyed.

Example two

The embodiment of the invention provides a slag steam treatment process, and a blast furnace water quenching slag steam treatment device in the embodiment I is used, and the process specifically comprises the following steps:

step S1, opening a blast furnace slag iron signal, manually selecting the slag pool 200, and moving the sealing cover plate 21 to the position above the selected slag pool 200 for sealing;

step S2, starting slag flushing water, wherein the slag flushing water enters the slag flushing tank 100 to carry out water quenching on blast furnace slag, and water slag and the slag flushing water generated by the water quenching flow into the slag pool 200 through the slag-water mixing tank 103; in the step S2, the high-temperature slag in the slag flushing tank 100 is quenched by water under the action of high-pressure high-speed slag flushing water, a slag-slurry mixture including water slag and slag flushing water flows into the slag pool 200 through the slag-water mixing tank 103, the water slag is precipitated at the upper part of the slag pool 200, the slag flushing water leaks to the bottom through the lower filtering layer, and then is led back to the water pool through a water pumping pipeline for recycling;

step S3, allowing steam generated by the water granulated slag to enter an exhaust chimney 101 of the slag flushing tank 100 along the steam collecting assembly 2 and the steam conveying assembly 3, and spraying water mist into the slag flushing tank 100 by a spraying water pipe 12 when the temperature measuring mechanism 13 detects that the temperature of the steam is higher than a first set temperature; preferably, in the embodiment, the first set temperature is 50 ℃, and when the temperature of the steam is higher than 50 ℃, the water spray pipe 12 sprays water mist into the slag flushing tank 100;

step S4, the slag iron signal of the blast furnace is closed, the steam generated by the water granulated slag is reduced, and when the temperature measuring mechanism 13 detects that the temperature of the steam is reduced to a second set temperature, the spray water pipe 12 is closed without condensation; in the present embodiment, the second set temperature is 40 ℃.

According to the slag steam treatment process disclosed by the embodiment of the invention, steam generated by slag water quenching can be rapidly cooled, so that environmental pollution and personnel health injury caused by air discharge are avoided, the consumption of slag flushing water of the blast furnace is greatly reduced, and energy conservation and production cost reduction are realized.

Preferably, in step S3, the method further includes the steps of: the water yield of the spray water pipe 12 is adjusted according to the temperature of the steam, and the opening degree of the control valve 121 of the spray water pipe 12 is increased by 10% every time the temperature of the steam rises by 5 ℃. When the temperature of the steam is higher than 50 ℃, and the water spray pipe 12 sprays water mist into the slag flushing tank 100, the opening degree of the control valve 121 can be set to be 50 percent, and the opening degree of the control valve 121 of the water spray pipe 12 is increased by 10 percent every time along with the temperature of the steam rising by 5 ℃ until the steam is fully opened; more specifically, during the normal on period of the blast furnace tapping iron signal, indicating that the slag is continuously water quenched, when the temperature of the steam is gradually decreased, the opening of the control valve 121 is closed by 5% for every 5 ℃ decrease until the slag is completely closed. In addition, during the normal starting period of the blast furnace slag iron tapping signal, when the steam temperature is lower than 40 ℃, the spray water pipe 12 does not need to be started, thereby saving water resources.

Preferably, before step S1, the method further includes the following steps: in 5 minutes before the blast furnace slag iron signal is turned on, the water pump is started to guide cooling water to enter the cooling water tank 11 of the cooling assembly 1, so that the deformation caused by overlarge gravity borne by the exhaust chimney 101 due to the fact that the water amount in the cooling water tank 11 is too much can be avoided. Further, the water level measuring mechanism 111 controls the amount of water in the cooling water tank 11 to be more than 3 tons to meet the requirement of continuous water spraying.

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. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. 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

1. A blast furnace water quenching slag steam treatment device is characterized by comprising:

the cooling assembly (1) is arranged on an exhaust chimney (101) of a slag flushing tank (100), the cooling assembly (1) comprises a cooling water tank (11), a plurality of spray water pipes (12) and a temperature measuring mechanism (13), one end of each spray water pipe (12) is communicated with the cooling water tank (11), the other end of each spray water pipe extends into the exhaust chimney (101), the spray water pipes (12) are configured to spray water mist into the slag flushing tank (100), the temperature measuring mechanism (13) is configured to detect the temperature of steam in the exhaust chimney (101), and the temperature measuring mechanism (13) is in communication connection with the spray water pipes (12);

the steam collecting assembly (2) comprises a closed cover plate (21) and a steam transition pipe (22), the closed cover plate (21) can be movably covered above any slag bath (200), the steam transition pipe (22) is arranged on the closed cover plate (21) and one end of the steam transition pipe is communicated with the slag bath (200), and the steam transition pipe (22) is configured to collect the steam in the slag bath (200); and

the steam delivery assembly (3), one end of the steam delivery assembly (3) is communicated with one end, away from the closed cover plate (21), of the steam transition pipe (22), and the other end of the steam delivery assembly extends into the exhaust chimney (101), and the steam delivery assembly (3) is configured to deliver the steam.

2. The blast furnace water quenching slag steam processing device according to claim 1, wherein the spray water pipe (12) is provided with a control valve (121), the control valve (121) is configured to control the water outlet amount of the spray water pipe (12), and the control valve (121) is communicatively connected with the temperature measuring mechanism (13).

3. The blast furnace water quenching slag steam treatment device according to claim 1, wherein the cooling assembly (1) is further provided with a compressed air pipe (14), one end of the compressed air pipe (14) is communicated with an external high-pressure air source, and the other end is communicated with the spray water pipe (12).

4. The blast furnace water quenching slag steam processing device according to claim 1, wherein a water level measuring mechanism (111) is further provided in the cooling water tank (11), and the water level measuring mechanism (111) is configured to measure the amount of water in the cooling water tank (11).

5. The blast furnace water quenching slag steam processing device according to claim 1, wherein the steam delivery assembly (3) comprises:

the steam guide pipe (31) is obliquely arranged, and the high end of the steam guide pipe (31) extends into the exhaust chimney (101);

the horizontal guide pipe (32) is communicated with the lower end of the steam guide pipe (31), the horizontal guide pipe (32) is provided with a plurality of sealing pipes (321), the sealing pipes (321) correspond to the slag pools (200) respectively, and the sealing pipes (321) can be communicated with the steam transition pipe (22).

6. The blast furnace water quenching slag steam treatment device according to claim 1, wherein the steam transition pipe (22) extends in parallel along the length direction of the closed cover plate (21), a plurality of guide pipes (211) are further arranged on the closed cover plate (21), the guide pipes (211) are arranged at intervals along the length direction of the closed cover plate (21), one end of each guide pipe (211) is communicated with the steam transition pipe (22), and the other end of each guide pipe is communicated with the slag bath (200).

7. The blast furnace water quenching slag steam treatment device according to claim 1, wherein the steam collection assembly (2) further comprises a slag bath communicating pipe (23), one end of the slag bath communicating pipe (23) is arranged at the end of the closed cover plate (21) to communicate with the slag bath (200), and the other end of the slag bath communicating pipe is communicated with the steam transition pipe (22).

8. A slag steam treatment process, characterized in that the blast furnace water-quenched slag steam treatment apparatus according to any one of claims 1 to 7 is used, and comprises the steps of:

step S1, opening a blast furnace slag iron signal, manually selecting a slag pool (200), moving a sealing cover plate (21) to the position above the selected slag pool (200) for sealing;

step S2, starting slag flushing water, wherein the slag flushing water enters a slag flushing tank (100) to carry out water quenching on blast furnace slag, and water slag generated by water quenching and the slag flushing water flow into the slag pool (200);

step S3, steam generated by the granulated slag enters an exhaust chimney (101) of the slag flushing tank (100) along a steam collecting assembly (2) and a steam conveying assembly (3), and when a temperature measuring mechanism (13) detects that the temperature of the steam is higher than a first set temperature, a spray water pipe (12) sprays water mist into the slag flushing tank (100);

and step S4, the slag iron signal of the blast furnace is closed, the steam generated by the water granulated slag is reduced, and when the temperature measuring mechanism (13) detects that the temperature of the steam is reduced to a second set temperature, the spray water pipe (12) is closed.

9. The slag steaming process of claim 8, further comprising, in the step S3, the steps of: and adjusting the water yield of the spray water pipe (12) according to the temperature of the steam, wherein the opening degree of a control valve (121) of the spray water pipe (12) is increased by 10% every time the temperature of the steam is increased by 5 ℃.

10. The slag steaming process of claim 8, further comprising, before the step S1, the steps of: and starting a water pump to guide cooling water into a cooling water tank (11) of the cooling assembly (1) within 5 minutes before the blast furnace slag iron signal is turned on.