Multifunctional liquid slag storage device

Abstract

The utility model relates to the technical field of metallurgical engineering, in particular to a multifunctional liquid slag storage device which comprises a ladle body and a ladle cover which are made of refractory materials, the ladle cover is detachably installed on the top of the ladle body, the ladle body is provided with a slag inlet and a slag outlet, the slag inlet is formed in one side of the ladle body, and a main body of the slag inlet is inclined. The slag outlet is formed in the bottom of the ladle body, the ladle cover is formed by splicing a plurality of ladle cover block units, a stopper rod which is controlled by a flow control mechanism to move up and down is mounted on the ladle cover, and the stopper rod corresponds to the slag outlet up and down. The ladle cover is arranged to be the multiple ladle cover block units, the overall weight is equally divided, hoisting is convenient, every two adjacent ladle cover block units are tightly matched and convenient to mount or dismount, large-area falling of refractory materials caused by the too large size of the ladle cover is effectively prevented, compared with the original design, the heat preservation effect is enhanced, and the service life of the slag storage device is prolonged; the slag inlet of the ladle body is changed to be inclined, so that the inflow direction of the slag is changed, and the impact force of the slag on the ladle body is reduced.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical engineering technology, and in particular to a multifunctional liquid slag storage device. Background Technology

[0002] Molten slag is a byproduct of blast furnace ironmaking, with discharge temperatures reaching 1400-1550℃. Slag storage devices are primarily used to store the high-temperature molten slag flowing from the slag ditch and are a type of metallurgical tundish in the steel industry. The slag storage device consists of a ladle body and a lid. The outer shell is welded from steel plates, while the interior is lined with refractory material. The ladle body is a container made of refractory material, and its cross-sectional shape can be trapezoidal, rectangular, or semi-circular. The shape of the lid can be customized to match the shape of the ladle body. The lid provides a sealed space for the ladle body, offering initial insulation for the molten slag.

[0003] Currently, in dry granulation, molten slag needs to flow from the slag outlet of the slag storage device to the granulation equipment for granulation. Due to the intermittent slag discharge of the blast furnace, a large amount of molten slag needs to be stored for use by the dry granulation equipment. Therefore, a large-volume slag storage device needs to be designed, resulting in a large overall size of the slag storage device's body and lid. For such a large body, the traditional one-piece lid design is no longer suitable.

[0004] Long-term use can lead to problems such as ladle cover cracking and large-scale refractory material detachment, severely impacting the service life of the tundish. Furthermore, during hoisting, the integral ladle cover may deform, preventing it from fitting snugly against the ladle body and affecting its sealing and insulation performance. This can easily cause molten slag to solidify, disrupting subsequent dry granulation processes. Additionally, the molten slag flows horizontally from the slag channel and then vertically into the slag storage device. Due to the large slag flow rate in the blast furnace, the refractory material at the bottom of the ladle is subjected to prolonged impact and erosion by the molten slag, causing corrosion and cracking, further shortening the tundish's service life. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the present invention provides a multifunctional liquid slag storage device.

[0006] The multifunctional liquid slag storage device provided by this utility model adopts the following technical solution:

[0007] A multifunctional liquid slag storage device includes a ladle body and a ladle cover made of refractory material. The ladle cover is detachably installed on the top of the ladle body. The ladle body has a slag inlet and a slag outlet. The slag inlet is located on one side of the ladle body and is inclined. The slag outlet is located at the bottom of the ladle body. The ladle cover is assembled from multiple ladle cover block units. A stopper rod that moves up and down under the control of a flow control mechanism is installed on the ladle cover. The stopper rod corresponds vertically to the slag outlet.

[0008] By adopting the above technical solution, the ladle cover is set up as multiple cover block units, which distribute the overall weight evenly and facilitates hoisting. The two adjacent cover block units fit tightly and are easy to install or disassemble, effectively preventing large-area refractory material from falling off due to the excessive volume of the ladle cover. Compared with the original design, the heat preservation effect is enhanced and the service life of the slag storage device is extended. The slag inlet of the ladle body is changed to an inclined shape, which changes the flow direction of slag and reduces the impact force of slag on the ladle body.

[0009] Optionally, the cover block unit has an outwardly protruding overlapping part on its side, and two adjacent cover block units overlap each other.

[0010] By adopting the above technical solution, the overlapping connection facilitates mutual support and improves the stability of the cover block unit after installation.

[0011] Optionally, an impact platform can be detachably installed on the bottom of the bag near the slag inlet. The impact platform is U-shaped.

[0012] By adopting the above technical solution, the impact table can slow down the slag flow speed, prevent slag splashing, and play a buffering role.

[0013] Optionally, a slag weir and / or slag dam may be provided between the impact platform and the slag outlet.

[0014] By adopting the above technical solutions, the slag weir and / or slag dam purify the slag flow and slow down the slag flow velocity again, thereby forming a stable slag flow.

[0015] Optionally, the bag lid is equipped with a temperature sensor and a burner heating mechanism that extend into the bag body.

[0016] By adopting the above technical solution, when the temperature sensor detects that the temperature inside the ladle is below 1200℃, the burner heating mechanism is activated to heat the molten slag inside the ladle; when the temperature inside the ladle is above 1500℃, the burner heating mechanism is disconnected, so that the temperature of the molten slag is kept within a stable range during the dry granulation process, ensuring the stable operation of the subsequent dry granulation process.

[0017] Optionally, a radar material meter extending into the bag body is installed on the bag cover, and an emergency slag discharge port is provided at the bottom of the side wall of the bag body.

[0018] By adopting the above technical solution, the radar material meter can monitor the volume change of molten slag in the ladle in real time. During the period of maximum slag discharge of the blast furnace, when the molten slag storage reaches more than 80% of the maximum volume of the ladle, some molten slag flows into the dry slag pit through the emergency slag discharge port to avoid molten slag overflow and ensure personnel safety and stable equipment operation.

[0019] In summary, this utility model has at least one of the following beneficial technical effects:

[0020] The lid is set up as multiple lid block units, which distribute the overall weight evenly and facilitates hoisting. The two adjacent lid block units fit tightly and are easy to install or disassemble, effectively preventing large-area refractory material from falling off due to the excessive size of the lid. Compared with the original design, the heat preservation effect is enhanced and the service life of the slag storage device is extended.

[0021] The slag inlet of the ladle was changed to an inclined shape, which changed the direction of slag flow and reduced the impact of slag on the ladle. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the multifunctional liquid slag storage device according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the cover block unit according to an embodiment of the present utility model.

[0024] Figure 3 This is a schematic diagram of the flow control mechanism and emergency slag discharge port according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Bag body; 100. Slag inlet; 101. Slag outlet; 102. Emergency slag discharge outlet; 2. Bag cover; 200. Bag cover block unit; 3. Stopper rod; 4. Flow control mechanism; 5. Impact platform; 6. Slag weir; 7. Slag dam; 8. Temperature sensor; 9. Burner heating mechanism; 10. Radar material meter. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 The present invention will be described in further detail below.

[0027] This utility model discloses a multifunctional liquid slag storage device. (Refer to...) Figures 1-3 The multifunctional liquid slag storage device includes a ladle body 1. The outer shell of the ladle body 1 is welded from steel plates, and the inner shell is made of refractory material. The ladle body 1 can store 50%-80% of the slag from the blast furnace slag removal cycle. A slag inlet 100 is provided on one side of the ladle body 1. The slag inlet 100 includes a vertical section connecting to the outside and an inclined section connecting to the inside of the ladle body 1. The slag flows horizontally from the slag channel, first entering the vertical section and then the inclined section, and finally flowing into the ladle body 1 at an angle, reducing the impact force on the ladle body 1. A slag outlet 101 is provided in the middle of the bottom plate of the ladle body 1, and an emergency slag discharge outlet 102 is also provided at the bottom of the rear wall of the ladle body 1.

[0028] Reference Figure 1 and Figure 2The ladle body 1 has a detachable lid 2 installed on its top. The lid 2 has an outer shell made of welded steel plates and an inner shell made of refractory material. The lid 2 is composed of three lid block units 200 spliced ​​together. The sides of the lid block units 200 are provided with outwardly protruding overlapping parts, and adjacent lid block units 200 overlap each other. A vertically movable stopper rod 3 is installed in the center of the lid 2. The stopper rod 3 is set corresponding to the slag outlet 101 to control the start and stop of molten slag discharge and the discharge speed.

[0029] Reference Figure 1 and Figure 3 The outer surface of the package 1 is equipped with a flow control mechanism 4 for controlling the up-and-down movement of the stopper rod 3. The flow control mechanism 4 is a commonly used device in this field, which can meet the usage requirements and is not limited here. The slag flow rate is adjusted by the flow control mechanism 4 to ensure dynamic balance with the subsequent dry granulation process.

[0030] Reference Figure 1 An impact platform 5 is detachably installed on the bottom side of the ladle body 1 near the slag inlet 100. The impact platform 5 is U-shaped, and the molten slag discharged from the slag inlet 100 falls onto the impact platform 5 to slow down the slag flow velocity, prevent slag splashing, and act as a buffer. The impact platform 5 is made of the same refractory material as the ladle body 1, reducing the erosion of the refractory material inside the ladle body 1 by the molten slag, protecting the refractory material of the ladle body 1, and extending the service life of the molten slag storage device. Inside the ladle body 1, a slag weir 6 and a slag dam 7 are also arranged in sequence. The slag weir 6 and the slag dam 7 are located between the impact platform 5 and the slag outlet 101. The two dams purify the slag flow and slow down the slag flow velocity again, thereby forming a stable slag flow.

[0031] Reference Figure 1 When slag feeding stops at the slag inlet 100, the temperature of the molten slag inside the ladle will gradually decrease as the subsequent dry granulation process continues. A temperature sensor 8 and a burner heating mechanism 9, extending into the ladle body 1, are installed on the ladle cover 2. When the temperature sensor 8 detects that the temperature inside the ladle is below 1200℃, it activates the burner heating mechanism 9 to heat the molten slag inside the ladle; when the temperature inside the ladle is above 1500℃, the burner heating mechanism 9 disconnects, keeping the molten slag temperature within a stable range during the dry granulation process and ensuring the stable operation of the subsequent dry granulation process.

[0032] Reference Figure 1 The ladle cover 2 is also equipped with a radar material meter 10 that extends into the ladle body 1. The radar material meter 10 can monitor the change in the volume of molten slag inside the ladle at all times. During the period of maximum slag discharge of the blast furnace, when the molten slag storage reaches more than 80% of the maximum volume of the ladle body 1, some molten slag flows into the dry slag pit through the emergency slag discharge port 102 to avoid molten slag overflow and ensure personnel safety and stable equipment operation.

[0033] The multifunctional liquid slag storage device of this utility model, by setting the cover 2 into multiple cover block units 200, distributes the overall weight evenly, which is convenient for hoisting. Adjacent cover block units 200 overlap and are fixed, which fits tightly and is convenient for installation or disassembly. It effectively prevents the refractory material from falling off over a large area due to the excessive volume of the cover 2. Compared with the original design, it enhances the heat preservation effect and extends the service life of the slag storage device.

[0034] The slag inlet 100 of the ladle body 1 has been changed to a bent shape, altering the direction of molten slag flow and reducing the impact of molten slag on the ladle body 1. A replaceable concave impact platform 5 is installed inside the ladle body 1 to buffer the slag flow, reducing erosion of the refractory material inside the ladle body 1 by molten slag, protecting the refractory material, and extending the service life of the molten slag storage device. The ladle cover 2 is equipped with functional devices that allow for real-time control of slag flow rate and temperature, ensuring stable operation of the subsequent dry granulation process.

[0035] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A multi-functional liquid slag storage device, characterized by: The application relates to a ladle body (1) and a ladle cover (2) made of refractory material, wherein the ladle cover (2) is detachably mounted on the top of the ladle body (1), the ladle body (1) is provided with a slag inlet (100) and a slag outlet (101), the slag inlet (100) is arranged on one side of the ladle body (1) and the main body is in an inclined shape, the slag outlet (101) is arranged on the bottom of the ladle body (1), the ladle cover (2) is spliced by a plurality of ladle cover block units (200), the ladle cover (2) is provided with a stopper (3) which is controlled to move up and down by a flow control mechanism (4), and the stopper (3) is in up-and-down correspondence with the slag outlet (101).

2. The multi-functional liquid slag storage device according to claim 1, characterized in that: The side of the ladle cover block unit (200) is provided with an outwardly protruding lap joint part, and two adjacent ladle cover block units (200) are lapped with each other.

3. The multi-functional liquid slag storage device according to claim 1, characterized in that: The side of the ladle body (1) close to the slag inlet (100) is detachably provided with an impact platform (5), and the impact platform (5) is in a concave shape.

4. The multi-functional liquid slag storage device according to claim 1 or 3, characterized in that: A slag blocking weir (6) and / or a slag blocking dam (7) are arranged between the impact platform (5) and the slag outlet (101).

5. The multi-functional liquid slag storage device of claim 1, wherein: The ladle cover (2) is provided with a temperature sensor (8) and a burner heating mechanism (9) which extend into the interior of the ladle body (1).

6. The multi-functional liquid slag storage device of claim 1, wherein: The ladle cover (2) is provided with a radar material meter (10) which extends into the interior of the ladle body (1), and the bottom of the side wall of the ladle body (1) is provided with an emergency slag discharge port (102).

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