Blast furnace slag discharge apparatus and method

Abstract

The application discloses a blast furnace slag discharging device and a discharging method. The discharging device comprises a main slag groove, a dry slag groove, a flow guide groove, a first switching piece and a second switching piece. One end of the main slag groove is provided with a slag inlet, and the other end is connected with a water slag system. A first discharging port and a switching port are formed in the main slag groove. A refractory baffle is arranged at the switching port to block the switching port. The refractory baffle is moved upward to expose the switching port. One end of the dry slag groove is connected with the first discharging port, and the other end is connected with a dry slag pool. A second discharging port is formed in the dry slag groove. The bottom height of the dry slag groove is higher than that of the main slag groove. One end of the flow guide groove is connected with the second discharging port, and the other end is used for connecting with a transport tank. The first switching piece is rotatably arranged outside the main slag groove. The first switching piece can be rotated to the main slag groove to block the main slag groove. The second switching piece is rotatably arranged in the dry slag groove. The second switching piece selectively blocks the second discharging port and a channel connecting the dry slag groove with the dry slag pool. The discharging device can switch the discharging channel according to different working conditions during slag discharging.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel smelting equipment, and particularly relates to a blast furnace slag discharging device and a discharging method. BACKGROUND

[0002] In the process of discharging slag and iron from a blast furnace, slag and iron are separated in a main groove, molten iron in the blast furnace flows into a molten iron ladle along an iron groove, and blast furnace slag flows into a water slag system along a slag groove, and the product water slag is obtained after water quenching. High-temperature blast furnace slag produced in the blast furnace smelting is usually obtained by a water quenching process to obtain water slag with high value, and a small part of the high-temperature blast furnace slag is obtained by a dry slag process to obtain dry slag. The dry slag process is specifically as follows: the high-temperature blast furnace slag flows into a dry slag pool through the slag groove, is cooled and broken by natural cooling, and dry slag is obtained. The dry slag has low use value, and in general, the dry slag process is used only when the water slag system fails. In addition, the high-temperature blast furnace slag can be cooled without the water quenching process or the dry slag process, and is directly conveyed to a slag cotton workshop by a slag tank to be made into slag cotton.

[0003] At present, if the water slag system fails (for example, the water slag conveying belt suddenly stops, the water gate pump suddenly stops, and other failure problems) during the discharging process of the high-temperature blast furnace slag, the process of the dry slag is not switched quickly, at this time, the iron notch of the blast furnace needs to be urgently plugged, a dry slag groove and a dry slag pit are then made, the iron notch is re-opened, and after slagging, the high-temperature blast furnace slag is introduced into the dry slag groove and the dry slag pit. However, the dry slag pit may have problems such as water accumulation at the bottom of the pit, which may cause the high-temperature blast furnace slag to enter the dry slag pit and cause phenomena such as explosion. Therefore, the high-temperature blast furnace slag may be temporarily introduced into a standby dry slag pit, which is very time-consuming and has a low safety factor.

[0004] In addition, when the high-temperature blast furnace slag needs to be introduced into the slag tank, a refractory baffle made in advance is usually used by a furnace worker to manually insert the refractory baffle into the intersection between the slag groove and the introduction groove (a channel connected to the slag tank), so that the blast furnace slag in the slag groove overflows into the introduction groove. After the slag tank is filled, the refractory baffle is manually removed, and the high-temperature blast furnace slag returns to the original flow mode. However, manual operation of the refractory baffle has the following problems: 1. The high-temperature blast furnace slag area is labor-intensive and high-risk, and the furnace worker is baked in the high-temperature area for a long time, which is harmful to the body; 2. When the slag flow is small, the insertion depth and the interception area of the refractory baffle can only be adjusted manually, which is difficult to operate and has a high risk of operation, and safety accidents are likely to occur. SUMMARY

[0005] The purpose of the embodiment of the present application is to provide a blast furnace slag discharging device and a discharging method, which can switch the discharging channel according to different working conditions during slag discharging, and has low operation difficulty and low operation risk.

[0006] To achieve this purpose, the present application adopts the following technical scheme:

[0007] In a first aspect, a blast furnace slag discharge device is provided, comprising a water slag system and a dry slag pool arranged at intervals, the blast furnace slag discharge device further comprising:

[0008] A main slag ditch, one end of which is provided with a slag inlet and the other end is connected to the water slag system, a first discharge port is provided on the main slag ditch, a switching port is provided on the main slag ditch, the switching port and the first discharge port are respectively located on two opposite side walls of the main slag ditch, a refractory baffle is provided at the switching port to block the switching port, and the refractory baffle is connected to the baffle driving member to achieve at least vertical upward movement;

[0009] a dry slag ditch, one end of which is connected to the first discharge port and the other end is connected to the dry slag pool, a second discharge port is provided on the dry slag ditch, and the bottom height of the dry slag ditch is higher than the bottom height of the main slag ditch;

[0010] a drainage ditch, one end of which is connected to the second discharge port and the other end of which is connected to the transport tank;

[0011] a first switching member, which is rotatably arranged outside the main slag ditch and adjacent to the switching port; the first switching member is connected to a first driving member to achieve rotation; the first switching member can be rotated from the switching port into the main slag ditch to block the main slag ditch; when the first switching member is located in the main slag ditch, the first switching member is located on a side of the first discharge port close to the water-slag system;

[0012] A second switching member is rotatably disposed in the dry slag ditch, and the second switching member selectively blocks the passage connecting the second discharge port and the dry slag ditch to the dry slag pool.

[0013] As an optional solution for the blast furnace slag discharge equipment, when the first switching member is located outside the main slag ditch, a refractory barrier material is provided between the first switching member and the refractory baffle.

[0014] As an optional solution for blast furnace slag discharge equipment, the first switching member includes a first plate body and a second plate body connected at an angle, the first driving member includes a driving motor, a driving gear, a transmission gear, a fixed shaft and a rotating sleeve, one end of the first plate body is connected to one end of the second plate body and is simultaneously connected to the rotating sleeve, the other end of the first plate body and the other end of the second plate body are connected by a connecting plate, the first plate body is close to the refractory baffle, the first plate body includes a base plate and a refractory layer, the refractory layer is arranged on a side of the base plate close to the refractory baffle, the rotating sleeve is rotatably arranged on the fixed shaft, the output shaft end of the driving motor is connected to the driving gear, the transmission gear is arranged on the rotating sleeve, and the transmission gear and the driving gear are meshed.

[0015] As an optional solution for blast furnace slag discharge equipment, an induction plate is provided on the second plate body, a first proximity switch is provided outside the main slag groove, and a second proximity switch is provided on the inner wall of the switching port. When the induction plate abuts against the first proximity switch, the first switching component is located outside the main slag groove; when the induction plate abuts against the second proximity switch, the first switching component is located inside the main slag groove and blocks the main slag groove.

[0016] As an optional solution for blast furnace slag discharge equipment, the main slag groove is concave toward its interior to form a groove, and a protrusion is formed on the inner side of the main slag groove. The protrusion is provided with an inclined guide surface on one side facing the slag inlet, the switching port is opened at the bottom of the groove, and the first switching member is partially located in the groove.

[0017] As an optional solution for blast furnace slag discharge equipment, the bottom of the main slag ditch includes a first ditch bottom, a second ditch bottom and a third ditch bottom connected in sequence, the end of the first ditch bottom away from the second ditch bottom is adjacent to the slag inlet, the first ditch bottom is inclined downward from the end close to the slag inlet toward the end connected to the second ditch bottom, the second ditch bottom is horizontally arranged, and the third ditch bottom is inclined downward from the end connected to the second ditch bottom toward the end close to the water slag system.

[0018] As an optional solution for blast furnace slag discharge equipment, the second switching member is rotatably connected to the inner wall of the dry slag ditch close to the drainage ditch through a rotating shaft, and a tightening surface is provided at the end of the second switching member away from the rotating shaft, and two tightening surfaces distributed along the thickness direction of the second switching member are provided at the end of the second switching member, and the tightening surfaces are inclined, one of the tightening surfaces is used to tighten the inner wall of the dry slag ditch, and the other tightening surface is used to tighten the inner wall of the drainage ditch.

[0019] In a second aspect, a method for discharging blast furnace slag is provided, which uses the blast furnace slag discharging device as described above, comprising the following steps:

[0020] Step S100: before the iron mouth of the blast furnace is opened, the first switching member is rotated to the outside of the main slag ditch, and a refractory baffle is inserted at the switching opening of the main slag ditch to block the switching opening;

[0021] Step S200: Check the slag water system to ensure that the slag water system remains in a fault-free state before the taphole is opened;

[0022] Step S300: opening the taphole, discharging high-temperature slag from the main slag ditch into the water-slag system for water quenching;

[0023] Step S400: continuously checking the water slag system. When a fault occurs in the water slag system, starting the baffle driving member to move the refractory baffle in a vertical direction to expose the switching port;

[0024] Step S500: The first driving member drives the first switching member to rotate through the switching port into the main slag groove, thereby blocking the main slag groove. The liquid level of the blast furnace slag in the main slag groove rises until the blast furnace slag enters the dry slag groove.

[0025] Step S600: Select the working mode of the dry slag ditch as needed. When dry slag treatment is required, the second switching member is rotated to block the second discharge port, and the high-temperature slag enters the dry slag pool from the dry slag ditch. When transportation in a transport tank is required, the second switching member is rotated to block the channel connecting the dry slag ditch to the dry slag pool to expose the second discharge port, so that the high-temperature slag enters the drainage ditch.

[0026] As an optional scheme for the blast furnace slag discharge method, step S100' is further provided before step S200: refractory blocking material is filled between the refractory baffle and the first switching member. In step S500, when the first driving member drives the first switching member to rotate, the first switching member pushes the refractory blocking material into the main slag groove, and the refractory blocking material is blocked on the side of the first switching member facing the high-temperature slag.

[0027] As an optional scheme for the blast furnace slag discharge method, step S700 is further provided after step S600: after the slag is discharged from the iron mouth of the blast furnace, the iron mouth is closed, and after the high-temperature slag in the main slag ditch and the dry slag ditch is discharged, the impurities on the main slag ditch, the refractory baffle and the first switching member are cleaned, and then the first driving member is started to rotate the first switching member to the outside of the main slag ditch, the refractory baffle is moved to seal the switching port, and the refractory barrier material is filled between the first switching member and the refractory baffle for next use.

[0028] The beneficial effects of the present invention are as follows: by arranging a rotating first switching member on the outside of the main slag ditch and arranging a refractory baffle that can be automatically lifted at the switching port, when the water slag system fails, the baffle driving member drives the refractory baffle to lift, exposing the switching port. At this time, the first switching member can be automatically rotated into the main slag ditch under the drive of the first driving member to seal the main slag ditch, preventing high-temperature slag from entering the faulty water slag system again. Under the obstruction of the refractory baffle, the high-temperature slag liquid level in the main slag ditch rises until it can enter the dry slag ditch, and the rotating second switching member allows the high-temperature slag to enter either the dry slag pool or the drainage ditch through the dry slag ditch. If the high-temperature slag enters the dry slag pool, it will be naturally cooled. Dry slag is formed. If the high-temperature slag enters the drainage ditch, it will be transported to the transport tank and then transported to the slag cotton workshop through the transport tank. The dry slag ditch and dry slag pool are prepared in advance for the entire operation. When the water slag system fails, there is no need to seal the iron mouth. The blocking is achieved by the automatically driven first switching member and the refractory baffle to drain the high-temperature slag into the dry slag ditch. The operation has low labor intensity, and the operator can operate remotely with high safety. The rotating second switching member can drain part of the high-temperature slag from the dry slag ditch to the transport tank. The opening and closing angle of the rotating second switching member can also be adjusted, which effectively reduces the difficulty of operation. The opening and closing angle of the second switching member can be adjusted according to the required slag flow size. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0030] Figure 1 This is a structural schematic diagram of the blast furnace slag discharge equipment according to an embodiment of the present invention (when the first switching member is located outside the main slag ditch).

[0031] Figure 2 for Figure 1 Enlarged schematic diagram of point A.

[0032] Figure 3 This is a structural schematic diagram of the blast furnace slag discharge equipment according to an embodiment of the present invention (when the first switching member is located in the main slag ditch).

[0033] In the picture:

[0034] 100. Transport tanks;

[0035] 1. Water slag system; 2. Dry slag pool; 3. Main slag ditch; 301. Slag inlet; 302. First discharge port; 303. Switching port; 304. Groove; 305. Protrusion; 3051. Guide surface; 306. First ditch bottom; 307. Second ditch bottom; 308. Third ditch bottom; 4. Refractory baffle; 5. Dry slag ditch; 501. Second discharge port; 6. Drainage ditch; 7. First switching member; 701. First plate; 7011. Base plate; 7012. Refractory layer; 702. Second plate; 703. Connecting plate; 8. First driving member; 801. Driving gear; 802. Fixed shaft; 803. Rotating sleeve; 9. Second switching member; 901. Abutting surface; 10. Refractory barrier material; 11. Induction plate; 12. First proximity switch; 13. Second proximity switch; 14. Rotating shaft. DETAILED DESCRIPTION

[0036] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] like Figures 1 to 3As shown, an embodiment of the present invention provides a blast furnace slag discharge device, including a water slag system 1, a dry slag pool 2, a main slag ditch 3, a dry slag ditch 5, a drainage ditch 6, a first switching member 7 and a second switching member 9, wherein the water slag system 1 and the dry slag pool 2 are arranged at intervals, the water slag system 1 is used to water quench the high-temperature slag to form water slag, and the dry slag pool 2 is used to naturally cool the high-temperature slag to form dry slag.

[0040] Specifically, a slag inlet 301 is provided at one end of the main slag ditch 3 for connecting to the iron mouth of the blast furnace (not shown). The other end of the main slag ditch 3 is connected to the water slag system 1. A first discharge port 302 is provided in the main slag ditch 3, and a switching port 303 is provided in the main slag ditch 3. The first discharge port 302 and the switching port 303 are arranged in sequence along the direction of conveying high-temperature slag in the main slag ditch 3, that is, the first discharge port 302 is upstream of the switching port 303, and the switching port 303 and the first discharge port 302 are respectively located on opposite sides of the main slag ditch 3. A refractory baffle 4 is provided at the switching port 303 to block the switching port 303. The refractory baffle 4 is connected to a baffle driver (not shown) to enable at least vertical upward movement. A dry slag ditch 5 is connected to the first discharge port 302 at one end and to the dry slag pool 2 at the other end. A second discharge port 501 is provided in the dry slag ditch 5, and the bottom height of the dry slag ditch 5 is higher than that of the main slag ditch 5. One end of the drainage ditch 6 is connected to the second discharge port 501 , and the other end is used to communicate with the transport tank 100 .

[0041] The first switching member 7 is rotatably disposed outside the main slag ditch 3 and adjacent to the switching port 303. The first switching member 7 is connected to the first driving member 8 for rotation. The first switching member 7 can rotate from the switching port 303 into the main slag ditch 3 to block the main slag ditch 3 (i.e., block the main slag ditch 3 from connecting to the water-slag system 1, preventing high-temperature slag in the main slag ditch 3 from entering the water-slag system 1). When the first switching member 7 is located within the main slag ditch 3, the first switching member 7 is located on the side of the first discharge port 302 that is closest to the water-slag system 1. The second switching member 9 is rotatably disposed within the dry slag ditch 5 and selectively blocks the passage connecting the second discharge port 501 and the dry slag ditch 5 to the dry slag pool 2.

[0042] The blast furnace slag discharge equipment of the embodiment of the present invention is provided with a rotating first switching member 7 on the outside of the main slag groove 3, and a refractory baffle 4 that can be automatically lifted is provided at the switching port 303. When the water slag system 1 fails, the baffle driving member drives the refractory baffle 4 to lift, exposing the switching port 303. At this time, the first switching member 7 can be automatically rotated into the main slag groove 3 to block the main slag groove 3 under the drive of the first driving member 8, to prevent the high-temperature slag from entering the faulty water slag system 1 again. Under the obstruction of the refractory baffle 4, the high-temperature slag liquid level in the main slag groove 3 rises until it can enter the dry slag groove 5, and the rotating second switching member 9 allows the high-temperature slag to enter the dry slag pool 2 and the drainage groove 6 through the dry slag groove 5. If the high-temperature slag enters the dry slag pool 2, it will be automatically Then it cools to form dry slag. If the high-temperature slag enters the drainage ditch 6, it will be transported to the transport tank 100 and transported to the slag wool workshop through the transport tank 100. The dry slag ditch 5 and the dry slag pool 2 are prepared in advance for the entire operation. When the water slag system 1 fails, there is no need to block the iron mouth of the blast furnace. The blocking is achieved by the automatically driven first switching member 7 and the refractory baffle 4 to drain the high-temperature slag into the dry slag ditch 5. The operation has low labor intensity, and the operator can operate remotely with high safety. The rotating second switching member 9 can drain part of the high-temperature slag from the dry slag ditch 5 to the transport tank 100. The opening and closing angle of the rotating second switching member 9 can also be adjusted, which effectively reduces the difficulty of operation. The opening and closing angle of the second switching member 9 can be adjusted according to the required slag flow size.

[0043] In this embodiment, the main slag ditch 3, the dry slag ditch 5 and the drainage ditch 6 are all formed by casting a steel plate on the outside and a refractory castable on the inside.

[0044] In addition, since the first switching member 7 remains in a position outside the main slag groove 3 when there is no need to seal the main slag groove 3, the service life of the first switching member 7 can be extended. The first switching member 7 does not need to be in contact with high-temperature slag at all times, and the first driving member 8 that is transmission-connected to the first switching member 7 can also extend its service life.

[0045] In this embodiment, the second switching member 9 can be manually driven to rotate, including adjusting the opening and closing degree of the second switching member 9 through manual operation.

[0046] In other embodiments, a second driving member may be provided to automatically drive the second switching member 9 to rotate and adjust the opening and closing degree. The provision of the second driving member enables fully automated operation, and the second switching member 9 can be remotely operated, which is less difficult and more secure than manual operation.

[0047] In one embodiment, when the first switching member 7 is located outside the main slag ditch 3, a refractory barrier material 10 is provided between the first switching member 7 and the refractory baffle 4. By providing the refractory barrier material 10, when the refractory baffle 4 rises to expose the switching port 303, the rotating first switching member 7 will first push the refractory barrier material 10 into the main slag ditch 3. At this time, the refractory barrier material 10 blocks the front of the first switching member 7 and contacts the high-temperature slag, that is, along the flow direction of the high-temperature slag, the refractory barrier material 10 is located upstream of the first switching member 7, forming an effective heat-insulating barrier to prevent the high-temperature slag from directly contacting the first switching member 7. This not only effectively prevents the first switching member 7 from being damaged in a high-temperature environment, but also forms an isolation to prevent the high-temperature slag from slagging on the first switching member 7, thereby reducing the difficulty of cleaning the first switching member 7.

[0048] In this embodiment, the refractory barrier material 10 is river sand. River sand is soft and easy to move, provides good insulation, resists agglomeration, and is easy to clean later. In other embodiments, the refractory barrier material 10 can also be other granular or small-block heat-resistant materials, such as sea sand or heat-resistant ore powder.

[0049] In an embodiment, the first switching piece 7 comprises a first plate body 701 and a second plate body 702 connected at an included angle, and the first driving piece 8 comprises a driving motor (not shown in the figure), a driving gear 801, a transmission gear (not shown in the figure), a fixed shaft 802 and a rotating sleeve 803. One end of the first plate body 701 and one end of the second plate body 702 are connected and at the same time connected with the rotating sleeve 803. The other end of the first plate body 701 and the other end of the second plate body 702 are connected through a connecting plate 703. The first plate body 701 is close to the refractory baffle 4. The first plate body 701 comprises a base plate 7011 and a refractory layer 7012. The refractory layer 7012 is arranged on the side of the base plate 7011 close to the refractory baffle 4. The rotating sleeve 803 is rotationally arranged on the fixed shaft 802. The output shaft end of the driving motor is connected with the driving gear 801. The transmission gear is arranged on the rotating sleeve 803. The transmission gear and the driving gear 801 are engaged. By arranging the first switching piece 7 in a frame structure, the strength is increased while the material is saved. By arranging the first plate body 701 in a composite structure of the base plate 7011 and the refractory layer 7012, the first plate body 701 has sufficient strength (needs to block the flowing high-temperature slag and can push the refractory blocking material 10) and good heat insulation effect. Since there is a space between the first plate body 701 and the second plate body 702, the space can also delay heat conduction. Therefore, the second plate body 702 can be made of non-insulating material, reducing the manufacturing cost. By arranging the combination structure of the driving motor, the driving gear 801, the transmission gear and the rotating sleeve 803, the first switching piece 7 can automatically rotate. The rotation angle of the first switching piece 7 can be controlled as needed. The self-locking function of the rotating motor can make the first switching piece 7 remain in the current state after rotating to the position, resisting the flowing impact force from the high-temperature slag.

[0050] In the embodiment, the first plate body 701 and the second plate body 702 are arranged at an included angle of 90 degrees. The connecting plate 703 is an outwardly convex arc-shaped plate, so that the first switching piece 7 forms a frame structure similar to a sector. When the first switching piece 7 rotates to block the main slag channel 3, the first plate body 701 can rotate to be tangent to the side wall of the dry slag channel 5, so that the high-temperature slag can be completely guided into the dry slag channel 5.

[0051] Furthermore, the second plate 702 and the connecting plate 703 are both made of steel plates, which have a strong ability to resist deformation and can effectively prevent the first switching member 7 from deforming. Furthermore, the thickness of the connecting plate 703 is greater than that of the second plate 702. The connecting plate 703 is the part that connects the first plate 701 and the second plate 702, and it bears relatively high strength. Therefore, the connecting plate 703 is mainly for support, and its thickness is set to be thicker than the first plate 701 to prevent the first switching member 7 from deforming. In addition, the first plate 701 is a non-pressure-bearing part and a part that does not directly contact high-temperature objects. Therefore, it can be manufactured and formed using thinner steel, effectively reducing manufacturing costs.

[0052] In one embodiment, a sensing plate 11 is provided on the second plate body 702, a first proximity switch 12 is provided outside the main slag ditch 3, and a second proximity switch 13 is provided on the inner sidewall of the switching opening 303. When the sensing plate 11 abuts the first proximity switch 12, the first switching member 7 is located outside the main slag ditch 3. When the sensing plate 11 abuts the second proximity switch 13, the first switching member 7 is located inside the main slag ditch 3 and blocks the main slag ditch 3. By providing the sensing plate 11 and the proximity switches, the rotational position of the first switching member 7, i.e., the position where it completely blocks the main slag ditch 3 and the position where it completely leaves the main slag ditch 3, can be accurately sensed, thereby achieving better automated control.

[0053] During specific operation, the blast furnace slag discharge equipment will also be provided with a controller, which is electrically connected to the water slag system 1, the first drive member 8, the baffle drive member, the first proximity switch 12, the second proximity switch 13 and other components to achieve automatic control. When the controller detects that the water slag system 1 has a fault, the controller will automatically control the baffle drive member to raise the refractory baffle 4, and then drive the first drive member 8 to rotate the first switching member 7 through the switching port 303 to enter the main slag groove 3. When the first switching member 7 completely blocks the main slag groove 3, the induction plate 11 abuts against the second proximity switch 13 to achieve electrical conduction, and the controller will obtain the information that the first switching member 7 has rotated into place, so the controller controls the first drive member 8 to stop and lock the current state of the first switching member 7.

[0054] In one embodiment, the main slag ditch 3 is recessed toward its interior to form a groove 304, and a corresponding protrusion 305 is formed on the inner side of the main slag ditch 3. The protrusion 305 is provided with an inclined guide surface 3051 on one side facing the slag inlet 301. The switching port 303 is opened at the bottom of the groove 304, and the first switching member 7 is partially located within the groove 304. The provision of the groove 304 can form a good accommodating area. This accommodating area not only hides part of the first switching member 7 and prevents the first switching member 7 from protruding too much outside the main slag ditch 3, but also forms a filling space for the refractory barrier material 10 within the accommodating area, ensuring that the refractory barrier material 10 can reduce the probability of outflow before and after the first switching member 7 rotates, and ensure that the first switching member 7 is pushed into the main slag ditch 3 as much as possible for heat insulation.

[0055] Furthermore, the guide surface 3051 forms an angle of 20°-30° with the main direction of flow of the high-temperature slag in the main slag ditch 3, and the end of the guide surface 3051 close to the water slag system 1 along the direction of flow of the high-temperature slag is horizontally aligned with the side of the first discharge port 302 close to the water slag system 1, so that when the first switching member 7 rotates to the inside of the main slag ditch 3, the side of the first switching member 7 blocking the high-temperature slag (i.e., the surface of the first plate 701) can be horizontally aligned with the side of the first discharge port 302 close to the water slag system 1, thereby avoiding the formation of high-temperature slag residue accumulation at this position.

[0056] In this embodiment, the top of the refractory baffle 4 is connected to a wire rope via a hook. The wire rope is connected to a baffle driver, specifically a drive cylinder, and the wire rope is connected to the piston of the drive cylinder. This design enables the refractory baffle 4 to automatically move upward to open the switch port 303, eliminating the need for manual upward movement of the refractory baffle 4, reducing operational difficulty and improving safety. The wire rope connection allows the refractory baffle 4 to be manually reset (i.e., inserted back into the position where the switch port 303 is located). This is typically done during iron mouth sealing (when the blast furnace is shut down or slag is temporarily discharging). Manual operation is safe in this situation. Furthermore, because the switch port 303 may contain residual refractory blocking material 10 or cooled slag, it is more appropriate to manually clean this area before resetting the refractory baffle 4. This provides a better sealing effect on the switch port 303 and prevents high-temperature slag from overflowing from the gaps between the four switch ports 303 of the refractory baffle during the next normal slag treatment.

[0057] Of course, in other embodiments, the refractory baffle 4 can also be directly connected to the driving cylinder or connected through a transmission part. The driving cylinder can drive the refractory baffle 4 to rise, and can also drive the refractory baffle 4 to fall and reset. At this time, the residual refractory blocking material 10 or cooled slag at the cleaning switching port 303 can also be cleaned manually or by an additional automatic cleaning mechanism. This automatic cleaning mechanism can be a robot arm that can realize automatic moving, dust collection and other components.

[0058] In this embodiment, the refractory baffle 4 uses a steel plate or other heat-resistant plate as a base, and refractory slurry is poured inside the base (ie, the side close to the inside of the main slag groove 3). Preferably, the thickness of the refractory baffle 4 is 30mm-50mm.

[0059] In one embodiment, the bottom of the main slag ditch 3 includes a first ditch bottom 306, a second ditch bottom 307 and a third ditch bottom 308 connected in sequence, the end of the first ditch bottom 306 away from the second ditch bottom 307 is adjacent to the slag inlet 301, the first ditch bottom 306 is inclined downward from the end close to the slag inlet 301 toward the end connected to the second ditch bottom 307, the second ditch bottom 307 is horizontally arranged, and the third ditch bottom 308 is inclined downward from the end connected to the second ditch bottom 307 toward the end close to the water slag system 1. By setting the first groove bottom 306 and the third groove bottom 308 of the main slag groove 3 to a structure that is downwardly inclined along the high-temperature slag conveying direction, the high-temperature slag can be drained to prevent the high-temperature slag from remaining in the main slag groove 3, and the second groove bottom 307 is set to a horizontal state. This position is exactly the position where the first switching member 7 rotates, which facilitates the first switching member 7 to rotate to a specified position to block the main slag groove 3. The second groove bottom 307 is set horizontally, and the flow speed of the high-temperature slag in this second groove bottom 307 section in the main slag groove 3 can be changed, thereby reducing the flow speed of the high-temperature slag, and facilitating the subsequent start-up of the first switching member 7 to reduce the difficulty of the first switching member 7 in forcibly intercepting the high-temperature slag.

[0060] In one embodiment, the second switching member 9 is rotatably connected to the inner side wall of the dry slag ditch 5 near the drainage ditch 6 via the rotating shaft 14. A pressing surface 901 is provided at the end of the second switching member 9 away from the rotating shaft 14. Two pressing surfaces 901 distributed along the thickness direction of the second switching member 9 are provided at the end of the second switching member 9 (the end away from the rotating shaft 14). The pressing surfaces 901 are arranged at an angle, one of which is used to press against the inner side wall of the dry slag ditch 5, and the other is used to press against the inner side wall of the drainage ditch 6. By providing the pressing surfaces 901, the second switching member 9 can achieve a good blocking effect when the second switching member 9 blocks the second discharge port 501 or the channel connecting the dry slag ditch 5 to the dry slag pool 2.

[0061] In this embodiment, the second switching member 9 is also provided with a pneumatically controlled rocker arm (not shown in the figure), which can drive the second switching member 9 to swing to any angle. The pneumatically controlled rocker arm is connected to the controller to realize automatic drive.

[0062] In other embodiments, a manual control swing rod may be provided for manual control.

[0063] An embodiment of the present invention further provides a blast furnace slag discharge method, which uses the blast furnace slag discharge equipment of any of the above embodiments, comprising the following steps:

[0064] Step S100, before the opening of the taphole of the blast furnace, the first switching piece 7 is rotated to the outside of the main slag channel 3, and the refractory baffle 4 is inserted at the switching opening 303 of the main slag channel 3 to block the switching opening 303;

[0065] Step S200, the water slag system 1 is detected to ensure that the water slag system 1 is in a fault-free state before the taphole is opened;

[0066] Step S300, the taphole is opened, and the high-temperature slag is discharged from the main slag channel 3 to the water slag system 1 for water quenching treatment;

[0067] Step S400, the water slag system 1 is continuously checked, and when the water slag system 1 fails, the baffle driving piece is started to move the refractory baffle 4 in the vertical direction to expose the switching opening 303;

[0068] Step S500, the first driving piece 8 drives the first switching piece 7 to rotate through the switching opening 303 and rotate into the main slag channel 3 to block the main slag channel 3, and the liquid level of the blast furnace slag in the main slag channel 3 rises until the blast furnace slag enters the dry slag channel 5;

[0069] Step S600, the working mode of the dry slag channel 5 is selected as needed, when dry slag treatment is needed, the second switching piece 9 is rotated to block the second discharge opening 501, and the high-temperature slag enters the dry slag pool 2 from the dry slag channel 5, when the transport tank 100 is needed to be transferred, the second switching piece 9 is rotated to block the channel of the dry slag channel 5 connected to the dry slag pool 2 to expose the second discharge opening 501, so that the high-temperature slag enters the drainage channel 6 and finally enters the transport tank 100.

[0070] The blast furnace slag discharge method of the embodiment can adjust the conveying mode of the high-temperature slag as needed by setting the automatically controlled first switching piece 7, the refractory baffle 4 and the second switching piece 9, if the water slag system 1 fails, the dry slag channel 5 can be automatically switched for dry slag treatment or discharge to the transport tank 100 for transfer to the slag wool workshop for slag wool manufacturing, the second switching piece 9 is used to realize the switching of dry slag treatment or transport tank 100 transfer, the whole process is automatically controlled, and the operator does not need to operate close, the high-temperature environment will not affect the physical condition of the operator, and the safety of operation can be improved.

[0071] Optionally, before step S200, step S100' is further provided: filling the refractory blocking material 10 between the refractory baffle 4 and the first switching piece 7, when the first driving piece 8 drives the first switching piece 7 to rotate in step S500, the first switching piece 7 pushes the refractory blocking material 10 into the main slag channel 3, and the refractory blocking material 10 blocks the side of the first switching piece 7 facing the high-temperature furnace slag. By filling the refractory blocking material 10 between the refractory baffle 4 and the first switching piece 7 in advance, when the refractory baffle 4 is lifted, the rotating first switching piece 7 can push the refractory blocking material 10 into the main slag channel 3 to block and block the high-temperature furnace slag, so as to avoid the high-temperature furnace slag directly contacting the refractory baffle 4 and damaging the refractory baffle 4.

[0072] In the embodiment, the refractory blocking material 10 is river sand, and in the specific operation, when the river sand is filled between the refractory baffle 4 and the first switching piece 7, a natural filling method is adopted, and compaction cannot be performed. Because the natural filling method can avoid river sand clumping, and thus can reduce the resistance of the river sand to the rotation of the first switching piece 7.

[0073] Further, after step S600, step S700 is further provided: after the furnace mouth discharges the furnace slag and the furnace mouth is closed, the high-temperature furnace slag in the main slag channel 3 and the dry slag channel 5 is discharged, and the impurities on the main slag channel 3, the refractory baffle 4 and the first switching piece 7 are cleaned, then the first driving piece 8 is started, the first switching piece 7 is rotated to the outside of the main slag channel 3, the refractory baffle 4 is moved to block the switching port 303, the refractory blocking material 10 is filled between the first switching piece 7 and the refractory baffle 4, and the refractory blocking material 10 is filled between the first switching piece 7 and the refractory baffle 4 for next use. After the furnace mouth is closed, the temperature in the main slag channel 3 and the dry slag channel 5 decreases, and at this time, the blocked first switching piece 7, the refractory baffle 4 and the second switching piece 9 can be reset and cleaned, so that they can be recycled and do not affect the next switching operation.

[0074] In addition, during the specific operation, the controller, the induction plate 11, the first proximity switch 12 and the second proximity switch 13 are also used to assist the automatic operation. Specifically, after the iron mouth of the blast furnace is opened, the controller starts the detection to detect whether there is a fault in the water slag system 1. Once a fault occurs, the water slag system 1 will issue a fault signal warning, and the fault signal is transmitted to the controller. At this time, the baffle drive is not started, and the second switching member 9 at the dry slag ditch 5 and the drainage ditch 6 rotates to the second discharge port 501 to block the drainage ditch 6. The operator determines whether to switch to dry slag processing based on the fault signal, and confirms in advance whether there are staff in the dry slag area. If there is no staff and it is confirmed that Switch to dry slag treatment, the controller controls the baffle driver to start, the baffle driver will lift the refractory baffle 4 to expose the switching port 303, the first driver 8 drives the first switching member 7 to rotate and push the river sand into the main slag ditch 3, when the induction plate 11 is pressed against the second proximity switch 13, the signal will be transmitted to the controller, indicating that the first switching member 7 is rotated into place, that is, the first switching member 7 is completely located in the main slag ditch 3, at this time, the first switching member 7 and the river sand together block and obstruct the high-temperature slag, under the obstruction of the first switching member 7, the liquid level in the main slag ditch 3 continues to rise until the high-temperature slag can enter the dry slag ditch 5, and enter the dry slag pool 2 along the dry slag ditch 5 for dry slag treatment.

[0075] When the water slag system 1 returns to normal, the first driving member 8 drives the first switching member 7 to rotate in the opposite direction to the outside of the main slag ditch 3. When the induction plate 11 is pressed against the first proximity switch 12, the signal will be transmitted to the controller, indicating that the first switching member 7 is reset to the initial position, that is, the first switching member 7 is completely located outside the main slag ditch 3. Then, the river sand and impurities at the switching port 303 are cleaned, and then the refractory baffle 4 is pulled downward to block the switching port 303, and then river sand is filled to fill the area between the refractory baffle 4 and the first switching member 7 for next use.

[0076] In addition to the discharge method when the water slag system 1 fails, the blast furnace slag discharge method of the embodiment of the present invention can also coordinate the transport tank 100 to collect high-temperature slag.

[0077] In the prior art, when the transport tank 100 transports slag, the required slag temperature is relatively high. The current situation is that during the slag discharge process, the size of the slag flow will change due to the state of the iron mouth, sometimes large and sometimes small, and the slag temperature will fluctuate. When the baffle is used manually to block the drainage, the slag temperature cannot be sensed at all, resulting in the drainage continuing to be blocked when the temperature is low, affecting the quality of slag cotton production.

[0078] This solution can collect high-temperature slag and improve the quality of slag wool production, as follows:

[0079] Even if the controller does not detect a fault in the water slag system 1, when it is necessary to collect high-temperature slag, the controller controls the baffle driver to start, and the baffle driver will raise the refractory baffle 4 to expose the switching port 303. The first driver 8 drives the first switching member 7 to rotate 45 degrees and push the river sand into the main slag ditch 3 (the main slag ditch 3 is not completely blocked at this time). A part of the slag can still enter the water slag system 1 through the main slag ditch 3 for water slag treatment. However, since the main slag ditch 3 is partially blocked, the main slag ditch 3 is blocked by the first switching member 7. The liquid level inside will continue to rise until the high-temperature slag can enter the dry slag ditch 5. At this time, the second switching member 9 at the dry slag ditch 5 and the drainage ditch 6 rotates to the second discharge port 501 to block the drainage ditch 6. When the high-temperature slag is detected in the dry slag ditch 5, it will stabilize for 2-3 minutes. The flowing slag will clean up the debris in the dry slag ditch. The controller controls the pneumatic rocker arm to swing, so that the second switching member 9 rotates to expose the second discharge port 501, and the remaining high-temperature part after screening out the low-temperature slag is drained into this drainage ditch 6 and collected into the transport tank 100.

[0080] During this process, adjustments can also be made based on the loading weight and loading speed requirements of the transport tank 100.

[0081] Specifically, when it is necessary to increase the loading weight and loading speed, the driving motor of the first driving member 8 drives the driving gear 801 to rotate in the first direction, so that the rotation angle of the first switching member 7 toward the main slag ditch 3 increases, reducing the flow of high-temperature slag from the main slag ditch 3 into the water slag system 1. At this time, the flow of high-temperature slag entering the dry slag ditch 5 and the drainage ditch 6 will increase. Conversely, when it is necessary to reduce the loading weight and loading speed, the driving motor of the first driving member 8 drives the driving gear 801 to rotate in the second direction, which is opposite to the first direction, so that the first switching member 7 rotates toward the outside of the main slag ditch 3, increasing the flow of high-temperature slag from the main slag ditch 3 into the water slag system 1. At this time, the flow of high-temperature slag entering the dry slag ditch 5 and the drainage ditch 6 will decrease, and the corresponding loading weight and loading speed will decrease.

[0082] In this specification, reference to terms such as "one embodiment" or "example" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0083] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0084] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and are not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will readily conceive of other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the present invention.

Claims

1. A blast furnace slag discharge device, comprising a water slag system and a dry slag pool arranged at intervals, characterized in that: Also includes: A main slag ditch, one end of which is provided with a slag inlet and the other end is connected to the water slag system, a first discharge port is provided on the main slag ditch, a switching port is provided on the main slag ditch, the switching port and the first discharge port are respectively located on two opposite side walls of the main slag ditch, a refractory baffle is provided at the switching port to block the switching port, and the refractory baffle is connected to the baffle driving member to achieve at least vertical upward movement; a dry slag ditch, one end of which is connected to the first discharge port and the other end is connected to the dry slag pool, a second discharge port is provided on the dry slag ditch, and the bottom height of the dry slag ditch is higher than the bottom height of the main slag ditch; a drainage ditch, one end of which is connected to the second discharge port and the other end of which is connected to the transport tank; a first switching member, which is rotatably arranged outside the main slag ditch and adjacent to the switching port; the first switching member is connected to a first driving member to achieve rotation; the first switching member can be rotated from the switching port into the main slag ditch to block the main slag ditch; when the first switching member is located in the main slag ditch, the first switching member is located on a side of the first discharge port close to the water-slag system; A second switching member is rotatably disposed in the dry slag ditch, and the second switching member selectively blocks the passage connecting the second discharge port and the dry slag ditch to the dry slag pool.

2. The blast furnace slag discharge equipment according to claim 1, characterized in that: When the first switching member is located outside the main slag ditch, a refractory barrier material is provided between the first switching member and the refractory baffle.

3. The blast furnace slag discharge equipment according to claim 1, characterized in that: The first switching member includes a first plate body and a second plate body connected at an angle, the first driving member includes a driving motor, a driving gear, a transmission gear, a fixed shaft and a rotating sleeve, one end of the first plate body is connected to one end of the second plate body and is simultaneously connected to the rotating sleeve, the other end of the first plate body and the other end of the second plate body are connected by a connecting plate, the first plate body is close to the fire-resistant baffle, the first plate body includes a base plate and a fire-resistant layer, the fire-resistant layer is arranged on a side of the base plate close to the fire-resistant baffle, the rotating sleeve is rotatably arranged on the fixed shaft, the output shaft end of the driving motor is connected to the driving gear, the transmission gear is arranged on the rotating sleeve, and the transmission gear and the driving gear are meshed.

4. The blast furnace slag discharge equipment according to claim 3, characterized in that: An induction plate is provided on the second plate body, a first proximity switch is provided outside the main slag ditch, and a second proximity switch is provided on the inner side wall of the switching port. When the induction plate abuts against the first proximity switch, the first switching component is located outside the main slag ditch; when the induction plate abuts against the second proximity switch, the first switching component is located inside the main slag ditch and blocks the main slag ditch.

5. The blast furnace slag discharge equipment according to claim 1, characterized in that: The main slag groove is concave toward its interior to form a groove, and a protrusion is formed correspondingly on the inner side of the main slag groove. The protrusion is provided with an inclined guiding surface on a side facing the slag inlet. The switching port is opened at the bottom of the groove, and the first switching member is partially located in the groove.

6. The blast furnace slag discharge equipment according to any one of claims 1 to 5, characterized in that: The bottom of the main slag ditch includes a first ditch bottom, a second ditch bottom and a third ditch bottom connected in sequence, the end of the first ditch bottom away from the second ditch bottom is adjacent to the slag inlet, the first ditch bottom is inclined downward from the end close to the slag inlet toward the end connected to the second ditch bottom, the second ditch bottom is horizontally arranged, and the third ditch bottom is inclined downward from the end connected to the second ditch bottom toward the end close to the water-slag system.

7. The blast furnace slag discharge equipment according to any one of claims 1 to 5, characterized in that: The second switching member is rotatably connected to the inner side wall of the dry slag ditch close to the drainage ditch through a rotating shaft. A pressing surface is provided at one end of the second switching member away from the rotating shaft. Two pressing surfaces distributed along the thickness direction of the second switching member are provided at the end of the second switching member. The pressing surfaces are inclined, one of the pressing surfaces is used to press against the inner side wall of the dry slag ditch, and the other pressing surface is used to press against the inner side wall of the drainage ditch.

8. A method for discharging blast furnace slag, characterized in that: The use of the blast furnace slag discharge equipment according to any one of claims 1 to 7 comprises the following steps: Step S100: before the iron mouth of the blast furnace is opened, the first switching member is rotated to the outside of the main slag ditch, and a refractory baffle is inserted at the switching opening of the main slag ditch to block the switching opening; Step S200: Check the slag water system to ensure that the slag water system remains in a fault-free state before the taphole is opened; Step S300: opening the taphole, discharging high-temperature slag from the main slag ditch into the water-slag system for water quenching; Step S400: continuously checking the water slag system. When a fault occurs in the water slag system, starting the baffle driving member to move the refractory baffle in a vertical direction to expose the switching port; Step S500: The first driving member drives the first switching member to rotate through the switching port into the main slag groove, thereby blocking the main slag groove. The liquid level of the blast furnace slag in the main slag groove rises until the blast furnace slag enters the dry slag groove. Step S600: Select the working mode of the dry slag ditch as needed. When dry slag treatment is required, the second switching member is rotated to block the second discharge port, and the high-temperature slag enters the dry slag pool from the dry slag ditch. When transportation in a transport tank is required, the second switching member is rotated to block the channel connecting the dry slag ditch to the dry slag pool to expose the second discharge port, so that the high-temperature slag enters the drainage ditch.

9. The blast furnace slag discharge method according to claim 8, characterized in that: Before step S200, step S100' is also set: refractory blocking material is filled between the refractory baffle and the first switching member. In step S500, when the first driving member drives the first switching member to rotate, the first switching member pushes the refractory blocking material into the main slag groove, and the refractory blocking material is blocked on the side of the first switching member facing the high-temperature slag.

10. The blast furnace slag discharge method according to claim 9, characterized in that: Step S700 is also set after step S600: after the slag is discharged from the iron mouth of the blast furnace, the iron mouth is closed, and the high-temperature slag in the main slag ditch and the dry slag ditch is discharged, the impurities on the main slag ditch, the refractory baffle and the first switching part are cleaned, and then the first driving part is started to rotate the first switching part to the outside of the main slag ditch, the refractory baffle is moved to seal the switching port, and the refractory barrier material is filled between the first switching part and the refractory baffle for next use.

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