Cold-state surface descaling system for continuous casting billet

Abstract

The invention belongs to the technical field of metallurgy, and particularly discloses a cold-state surface descaling system for continuous casting billets, which is used for dynamically recovering, separating and recycling water, grinding materials and scales generated after cleaning in real time; sewage generated by descaling and flushing is purified in real time through graded filtration of the first-stage filter and the second-stage filter, and the purified water flows back to the second-stage water tank and is reused for flushing the post-treatment tank and preparing slurry, so that the continuous supply amount of fresh water is reduced, and the industrial water cost is reduced; the sewage recycled in real time meets the recycling standard after being subjected to multi-stage filtration, sewage-free discharge is realized, and green production is realized; through dynamic real-time separation, real-time recovery of scale powder is achieved, the stable jet descaling effect is effectively guaranteed, it is guaranteed that continuous casting billet surface descaling is even and clean, and the stable product quality is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of metallurgical technology, specifically to a cold surface descaling system for continuously cast billets. Background Technology

[0002] In the metallurgical manufacturing process, continuously cast billets are formed from molten steel through a series of solidification, cooling, and extrusion processes to achieve the final required cross-sectional shape and length before being transferred to downstream processes for hot rolling. During this cooling and solidification process, the outer surface of the continuously cast billet comes into full contact with oxygen in the air, forming a dense oxide layer composed of various oxides, commonly known as scale.

[0003] To ensure the quality of hot-rolled finished products, the outer surface of the continuously cast billet substrate needs to be inspected to determine the quality level of the billet and provide a criterion for deciding which finishing process to use before hot rolling. However, the adhesion of scale obscures the surface of the continuously cast billet substrate, making conventional quality inspections inaccurate. Therefore, manufacturers urgently need an effective descaling method to remove scale from the entire surface of the continuously cast billet, obtaining the true morphology of the substrate surface, thereby ensuring the authenticity and accuracy of quality inspection.

[0004] Based on this descaling requirement, traditional descaling methods include dry shot blasting, acid washing, or manual polishing. Many scholars both domestically and internationally have proposed a series of solutions, as detailed below:

[0005] For example, document 1 (US2640792A) discloses a process for cleaning the surface of cast billets using flame. This process utilizes a high-energy, high-temperature jet flame to rapidly melt and remove defects such as vibration marks, cracks, and inclusions from the billet surface, thus ensuring a better surface quality for the subsequently rolled products. This process can solve surface defects in cast billets; however, the flame ablation process is costly and the system is expensive, and the ablation process may introduce new defects to the billet surface. This process can meet the requirements of certain steel grades and enterprises.

[0006] Furthermore, reference 2 (US20150217336A1) discloses a high-pressure pure water jet removal process for removing scale from the upper and lower surfaces of continuously cast slabs. The core of this process is the use of a narrow-slit nozzle to spray water jets through the narrow slits, flushing the upper and lower surfaces of the slab to achieve descaling. However, this process has a typical drawback: the water jet can only remove the hot scale from the slab after quenching it. It cannot effectively remove inclusions, cracks, or other defects in the slab matrix. Moreover, after the slab cools, oxide scale will re-form, still covering the original cracks in the matrix, making them invisible and failing to directly improve the efficiency of quality inspection.

[0007] Based on the above, reference 3 (US3455062) was also consulted, which discloses a recycling scheme for two media, water and sand. In this scheme, after the sand media settles, it is pumped by a slurry pump and transported through pipelines to the sand supply pipes of each nozzle, achieving a continuous abrasive supply to the nozzles. The suspension overflows into the first water tank, and is then pumped by a sewage pump to a hydrocyclone separator for the first stage of solid-liquid separation. The supernatant is returned to the subsequent sedimentation equipment for further sedimentation, while the turbid liquid is vertically discharged into a collection tank to settle, and then recycled again by the slurry pump. This scheme has some practicality for small-flow circulation, but the slurry pump operates under extremely harsh conditions, has a short service life, and requires frequent manual maintenance and consumable replacement. Furthermore, the first water tank, which overflows, inevitably contains a large amount of abrasive particles, necessitating the replacement of the sewage pump at the bottom with a slurry pump. Similarly, the slurry pump operates under equally harsh conditions, resulting in significant operational and maintenance costs. In addition, the high-pressure water source for the ejector in this system is a completely new external water source. Its existing filtration system cannot meet the requirements for the recycling of the high-pressure water source. Therefore, this solution can only be used as a semi-circulation process. The introduction of the high-pressure water source will cause the water volume of the system to continuously increase and cannot be continuously circulated, which will lead to the system needing to be discharged or outsourced for treatment periodically.

[0008] Meanwhile, reference 4 (US5201150) was also consulted. This scheme makes full use of the overflow method, discharging water from the first collection tank at the highest point to the two stacked water tanks below. The typical difference between this scheme and reference 3 is that it eliminates the overflow channel and uses bottom pumps to pump water to achieve media balance in the descaling tank. At the same time, the water pumped by the pump passes through a separator to capture the turbid liquid and discharge the supernatant to another independent water tank. The turbid liquid passes through the three-layer filter tank stacked at the bottom to purify and reuse the water, ultimately achieving a clean water supply cycle for the high-pressure pump unit. This scheme also has similar defects to reference 3: firstly, the pump unit directly pumps high-concentration slurry, resulting in a short service life and high maintenance costs; secondly, the supernatant from the separator is discharged to an independent water tank, which is not connected to the system's reuse interface. This leads to the continuous consumption and reduction of this part of the water, causing the water volume of the system to decrease sharply after a short period of circulation, requiring a large amount of fresh water to be continuously added to maintain continuous operation.

[0009] In summary, no publicly available solution can meet the multi-functional requirements of large-scale continuous production cycles as presented in this paper, so as to achieve continuous and stable collection and reuse under different operating conditions, and to meet the goal of enabling the hybrid jet system to adapt to the surface descaling of continuously cast billets. Summary of the Invention

[0010] The purpose of this invention is to provide a cold surface descaling system for continuously cast billets. It is a descaling process and media circulation model specifically designed for the removal of scale from the cold surface of continuously cast billets. Specifically, it involves the complete removal of scale from the outer surface of long strip-shaped metal materials, while dynamically and in real time recovering, separating and reusing the water, abrasive and scale generated after removal, so as to realize the continuous recycling and reuse of the system media.

[0011] To achieve the above objectives, the present invention provides the following technical solution: a cold surface descaling system for continuously cast billets, comprising an emitter assembly, a descaling box, a collection box, a post-treatment box, a sand valve body, an abrasive pump, a slurry distributor, a primary filter, a secondary filter, a mud collection box, a primary water tank, a secondary water tank, a collection water tank, a first water pump, a second water pump, a third water pump, and a fourth water pump.

[0012] The transmitter assembly is mounted on the descaling box, and the post-treatment box is located on the side of the descaling box. The lower box of the descaling box covers the post-treatment box. Conveying roller conveyors are installed on the descaling box and the post-treatment box, and the continuous casting billet body is conveyed on the roller conveyors. The collection box is located below the descaling box. The post-treatment box is equipped with a rinsing ring and a drying ring. The sand valve body is installed below the collection box, and the abrasive pump is installed below the sand valve body. The slurry distributor is installed connected to the abrasive pump and is connected to the transmitter assembly and the post-treatment box. The collection water tank outputs to the primary water tank through the first water pump. The receiving water tank outputs to the primary water tank through the fourth water pump, and the mud receiving tank outputs to the primary water tank. The primary water tank outputs to the primary filter through the second water pump. The primary filter outputs to the secondary filter and the mud receiving tank. The secondary filter outputs to the secondary water tank. The secondary water tank outputs to the rinsing ring and the slurry distributor through the third water pump.

[0013] In a preferred embodiment of the present invention, the launcher group includes a first launcher, a second launcher, a third launcher, and a fourth launcher. A first drive motor is mounted on the first launcher, a second drive motor on the second launcher, a third drive motor on the third launcher, and a fourth drive motor on the fourth launcher. The descaling chamber contains a first mixed jet, a second mixed jet, a third mixed jet, and a fourth mixed jet, each corresponding to one of the first, second, third, and fourth launchers, respectively. The first, second, third, and fourth launchers respectively execute the first, second, third, and fourth mixed jets, aiming at each surface of the continuously cast billet body to independently remove scale from the corresponding surface. The first, second, third, and fourth drive motors drive the first, second, third, and fourth launchers, respectively.

[0014] In a preferred embodiment of the present invention, the descaling box has a raw material inlet on the side away from the post-processing box, and the descaling box and the post-processing box are interconnected and fixed with an isolation plate. The post-processing box has a continuous casting billet output interface on the side away from the descaling box. The raw material inlet is used for the entry of the continuous casting billet body, and the isolation plate is used to separate and collect the water, abrasive, and scale collected in the descaling box and the post-processing box. However, the collected water, abrasive, and scale will still enter the collection box through the bottom of the descaling box. The continuous casting billet output interface is used to output the continuous casting billet body.

[0015] In a preferred embodiment of the present invention, a sand valve actuator is connected to the sand valve body, and an actuator output pipe is connected between the abrasive pump and the slurry distributor. The sand valve actuator is used to control the opening and closing of the sand valve body, and the actuator output pipe is used for the abrasive pump to output to the slurry distributor.

[0016] In a preferred embodiment of the present invention, the slurry distributor is provided with a first distributor output pipe, a second distributor output pipe, a third distributor output pipe, a fourth distributor output pipe, and a fifth distributor output pipe. A first distributor valve is connected to the first distributor output pipe, and the first distributor valve is connected to a first transmitter, and a first valve actuator is connected to the first distributor valve. A second distributor valve is connected to the second distributor output pipe, and the second distributor valve is connected to a second transmitter, and a second valve actuator is connected to the second distributor valve. A third distributor valve is connected to the third distributor output pipe, and the third distributor valve is connected to a third transmitter, and a third valve actuator is connected to the third distributor valve. A fourth distributor valve is connected to the fourth distributor output pipe, and the fourth distributor valve is connected to a fourth transmitter, and a fourth valve actuator is connected to the fourth distributor valve. The fifth distributor output pipe is connected to the post-processing tank. The output is sent to the first transmitter, second transmitter, third transmitter, and fourth transmitter through the first distributor output tube, the second distributor output tube, the third distributor output tube, and the fourth distributor output tube, and is switched on and off through the first distributor valve, the second distributor valve, the third distributor valve, and the fourth distributor valve. The first valve driver, the second valve driver, the third valve driver, and the fourth valve driver are used to drive the first distributor valve, the second distributor valve, the third distributor valve, and the fourth distributor valve.

[0017] In a preferred embodiment of the present invention, the primary filter is connected to a first filter output pipe and a second filter output pipe. The first filter output pipe is connected to a slurry collection tank, and the second filter output pipe is connected to a secondary filter. The primary filter traps large particles or lumpy slurry and transports them to the slurry collection tank through the first filter output pipe. The filtered water is transported to the secondary filter through the second filter output pipe.

[0018] In a preferred embodiment of the present invention, the secondary filter is provided with a precision filter output pipe and a bypass pipe. The bypass pipe is interconnected with the precision filter output pipe and is connected to the second filter output pipe. The precision filter output pipe is connected to the secondary water tank. A branch pipe valve is provided on the bypass pipe. By providing the branch pipe, it is possible to select whether to perform precision filtration on the water source output from the second output pipe, and the switch can be controlled by the branch pipe valve.

[0019] As a preferred embodiment of the present invention, the primary filter is a self-cleaning filter, a spiral separator, or a magnetic filter to separate different metal scales; the secondary filter is a precision filter, employing membrane filtration, paper bag filtration, or sand filtration to finely filter the remaining sediment and achieve the goal of water purification.

[0020] Preferably, in this invention, a water outlet pipe connects the mud collection tank and the primary water tank, and a first overflow outlet is connected to the side of the primary water tank, while a second overflow outlet is connected to the side of the secondary water tank. The water outlet pipe allows the mud collection tank to supply water to the primary water tank. The first overflow outlet allows the primary water tank to drain water when the water level is too high. The second overflow outlet allows the secondary water tank to drain water when the water level is too high.

[0021] In a preferred embodiment of the present invention, the first water pump has its input and output ends connected to a first input pipe and a first output pipe, respectively. The first input pipe is connected to a collection tank, and the first output pipe is connected to a primary water tank. The second water pump has its input and output ends connected to a second input pipe and a second output pipe, respectively. The second input pipe is connected to a primary water tank, and the second output pipe is connected to a primary filter. The third water pump has its input and output ends connected to a third input pipe and a third output pipe, respectively. The third input pipe is connected to a secondary water tank, and the third output pipe is connected to a rinsing pipe and a distribution pipe. The rinsing pipe is connected to a rinsing ring, and the drying ring is equipped with a hot air conveying pipe. The distribution pipe is connected to a slurry distributor. The fourth water pump is installed in the collection tank, and its output end is connected to a fourth output pipe, which is connected to a primary water tank. The fourth water pump is a submersible pump. The first water pump pumps water from the collection tank through the first input pipe and delivers it to the first-stage water tank through the first output pipe. The second water pump pumps water from the first-stage water tank through the second input pipe and delivers it to the first-stage filter through the second output pipe. The third water pump pumps water from the second-stage water tank through the third input pipe and delivers it to the flushing ring and slurry distributor through the flushing pipe and distribution pipe. The fourth water pump pumps water from the collection tank and delivers it to the first-stage water tank through the fourth output pipe. The hot air delivery pipe is used to deliver hot air to the drying ring.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] This invention enables the dynamic, real-time recovery, separation, and reuse of water, abrasive particles, and scale generated during the descaling process. Through tiered filtration using primary and secondary filters, the wastewater generated during descaling and rinsing is purified in real time. The purified water flows back to the secondary tank and is reused for rinsing in the post-treatment tank and for slurry preparation, reducing the continuous replenishment of fresh water and lowering industrial water costs.

[0024] Large particles of scale are removed by a primary filter, and small particles of residue are separated by a secondary filter. The scale is collected in a mud collection box to prevent it from mixing into sewage or causing equipment blockage during abrasive circulation. At the same time, it reduces the environmental pressure of indiscriminate discharge of solid waste and facilitates subsequent resource recycling.

[0025] The wastewater collected in real time is filtered through multiple stages to meet the standards for recycling, which can prevent the discharge of wastewater and meet the requirements of green production.

[0026] Dynamic real-time separation effectively ensures the process requirements for particle size and concentration of abrasive particles, thereby ensuring the descaling effect of the jet, ensuring the uniformity and cleanliness of the descaled finished product surface, and guaranteeing quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the transmitter assembly structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the present invention.

[0031] In the diagram: 1. Launcher assembly; 1-1. First launcher; 1-11. First drive motor; 1-12. First mixed jet; 1-2. Second launcher; 1-21. Second drive motor; 1-22. Second mixed jet; 1-3. Third launcher; 1-31. Third drive motor; 1-32. Third mixed jet; 1-4. Fourth launcher; 1-41. Fourth drive motor; 1-42. Fourth mixed jet; 2. Descaling box; 2-1. Raw material inlet; 2-2. Collection box; 2-3. Isolation guard plate; 3. 1. Post-processing box; 3-1. Continuous casting billet output interface; 4. Sand valve body; 4-1. Sand valve actuator; 5. Abrasive feeder; 5-1. Feeder output pipe; 6. Hot air conveying pipe; 7. Roller conveyor; 8. Slurry distributor; 8-1. First distributor output pipe; 8-11. First distributor valve; 8-12. First valve actuator; 8-2. Second distributor output pipe; 8-21. Second distributor valve; 8-22. Second valve actuator; 8-3. Third distributor output pipe; 8-31. Third distributor valve; 8-32, Third valve actuator; 8-4, Fourth distributor output pipe; 8-41, Fourth distributor valve; 8-42, Fourth valve actuator; 8-5, Fifth distributor output pipe; 9, Primary filter; 9-1, First filter output pipe; 9-2, Second filter output pipe; 10, Precision filter; 10-1, Precision filter output pipe; 10-2, Side branch pipe; 10-3, Branch pipe valve; 11, Mud collection tank; 11-1, Collection tank output water pipe; 12, Primary water tank; 12-1, First overflow discharge port; 13. Secondary water tank; 13-1. Overflow outlet; 14. Continuous casting billet body; 15. Water collection tank; 16. First water pump; 16-1. First input pipe; 16-2. First output pipe; 17. Second water pump; 17-1. Second input pipe; 17-2. Second output pipe; 18. Third water pump; 18-1. Third input pipe; 18-2. Third output pipe; 18-21. Flushing pipe; 18-22. Distribution pipe; 19. Fourth water pump; 19-2. Fourth output pipe; 20. Flushing ring; 21. Drying ring. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Please see Figure 1-2 This invention provides a technical solution: a cold surface descaling system for continuously cast billets, comprising an emitter assembly 1, a descaling box 2, a collection box 2-2, a post-treatment box 3, a sand valve body 4, an abrasive pump 5, a slurry distributor 8, a primary filter 9, a precision filter 10, a mud collection box 11, a primary water tank 12, a secondary water tank 13, a collection water tank 15, a first water pump 16, a second water pump 17, a third water pump 18, and a fourth water pump 19.

[0036] The emitter assembly 1 is mounted on the descaling box 2, and the post-processing box 3 is located on the side of the descaling box 2. Roller conveyors 7 are installed on both the descaling box 2 and the post-processing box 3, conveying the continuous casting billet body 14. A collection box 2-2 is located below the descaling box 2. A flushing ring 20 and a drying ring 21 are installed inside the post-processing box 3. A sand valve body 4 is installed below the collection box 2-2, and an abrasive feeder 5 is installed below the sand valve body 4. A slurry distributor 8 is connected to the abrasive feeder 5, and the slurry distributor 8 is connected to the emitter assembly 1. It is connected to the post-processing tank 3; the collection tank 2-2 outputs to the primary water tank 12 through the first water pump 16, the receiving water tank 15 outputs to the primary water tank 12 through the fourth water pump 19, and the mud receiving tank 11 outputs to the primary water tank 12; the secondary water tank 13 outputs to the primary filter 9 through the second water pump 17, the primary filter 9 outputs to the precision filter 10 and the mud receiving tank 11, the precision filter 10 outputs to the secondary water tank 13, and the secondary water tank 13 outputs to the flushing ring 20 and the slurry distributor 8 through the third water pump 18.

[0037] The transmitter group 1 includes a first transmitter 1-1, a second transmitter 1-2, a third transmitter 1-3, and a fourth transmitter 1-4. The first transmitter 1-1 is equipped with a first drive motor 1-11, the second transmitter 1-2 is equipped with a second drive motor 1-21, the third transmitter 1-3 is equipped with a third drive motor 1-31, and the fourth transmitter 1-4 is equipped with a fourth drive motor 1-41. The descaling box 2 is equipped with a first mixed jet 1-12, a second mixed jet 1-22, a third mixed jet 1-32, and a fourth mixed jet 1-42, which correspond to the first transmitter 1-1, the second transmitter 1-2, the third transmitter 1-3, and the fourth transmitter 1-4, respectively. The first launcher 1-1, the second launcher 1-2, the third launcher 1-3, and the fourth launcher 1-4, respectively, use the first mixed jet 1-12, the second mixed jet 1-22, the third mixed jet 1-32, and the fourth mixed jet 1-42 to target each surface of the continuously cast billet body 14 and independently complete the peeling and descaling of the corresponding surface; the first drive motor 1-11, the second drive motor 1-21, the third drive motor 1-31, and the fourth drive motor 1-41 are used to drive the first launcher 1-1, the second launcher 1-2, the third launcher 1-3, and the fourth launcher 1-4, respectively.

[0038] A raw material inlet 2-1 is provided on the side of the descaling box 2 away from the post-processing box 3. The descaling box 2 and the post-processing box 3 are interconnected and fixed with an isolation plate 2-3. A continuous casting billet output interface 3-1 is provided on the side of the post-processing box 3 away from the descaling box 2. The raw material inlet 2-1 is used for the entry of the continuous casting billet body 14. The isolation plate 2-3 is used to separate and collect the water, abrasive, and scale collected in the descaling box 2 and the post-processing box 3. However, the collected water, abrasive, and scale will still enter the collection box 2-2 through the bottom of the descaling box 2. The continuous casting billet output interface 3-1 is used to output the continuous casting billet body 14.

[0039] A sand valve actuator 4-1 is connected to the sand valve body 4, and an extractor output pipe 5-1 is connected between the abrasive extractor 5 and the slurry distributor 8. The sand valve actuator 4-1 is used to control the opening and closing of the sand valve body 4, and the extractor output pipe 5-1 is used for the abrasive extractor 5 to output to the slurry distributor 8.

[0040] The slurry distributor 8 is equipped with a first distributor output pipe 8-1, a second distributor output pipe 8-2, a third distributor output pipe 8-3, a fourth distributor output pipe 8-4, and a fifth distributor output pipe 8-5. A first distributor valve 8-11 is connected to the first distributor output pipe 8-1, which is connected to the first transmitter 1-1, and a first valve actuator 8-12 is connected to the first distributor valve 8-11. A second distributor valve 8-21 is connected to the second distributor output pipe 8-2, which is connected to the second transmitter 1-2, and the fifth distributor output pipe 8-5 is connected to the first distributor output pipe 8-1. The second distributor valve 8-21 is connected to the second valve actuator 8-22; the third distributor output pipe 8-3 is connected to the third distributor valve 8-31, which is connected to the third transmitter 1-3, and the third distributor valve 8-31 is connected to the third valve actuator 8-32; the fourth distributor output pipe 8-4 is connected to the fourth distributor valve 8-41, which is connected to the fourth transmitter 1-4, and the fourth distributor valve 8-41 is connected to the fourth valve actuator 8-42; the fifth distributor output pipe 8-5 is connected to the post-processing housing 3. Outputs are sent to the first transmitter 1-1, the second transmitter 1-2, the third transmitter 1-3, and the fourth transmitter 1-4 via the first distributor output tube 8-1, the second distributor output tube 8-2, the third distributor output tube 8-3, and the fourth distributor output tube 8-4, respectively. Switching is achieved through the first distributor valve 8-11, the second distributor valve 8-21, the third distributor valve 8-31, and the fourth distributor valve 8-41. The first valve actuator 8-12, the second valve actuator 8-22, the third valve actuator 8-32, and the fourth valve actuator 8-41 drive the first distributor valve 8-11, the second distributor valve 8-21, the third distributor valve 8-31, and the fourth distributor valve 8-41.

[0041] The primary filter 9 is connected to a first filter output pipe 9-1 and a second filter output pipe 9-2. The first filter output pipe 9-1 is connected to the mud collection tank 11, and the second filter output pipe 9-2 is connected to the precision filter 10. The primary filter 9 traps large particles or lumpy slurry and transports them to the mud collection tank 11 through the first filter output pipe 9-1. The filtered water is transported to the precision filter 10 through the second filter output pipe 9-2.

[0042] The precision filter 10 is equipped with a precision filter output pipe 10-1 and a side branch pipe 10-2. The side branch pipe 10-2 is connected to the precision filter output pipe 10-1 and is also connected to the second filter output pipe 9-2. The precision filter output pipe 10-1 is connected to the secondary water tank 13. A branch valve 10-3 is installed on the side branch pipe 10-2. By setting the side branch pipe 10-2, it is possible to select whether to perform precision filtration on the water source output from the second output pipe 17-2, and the switch is controlled by the branch valve 10-3.

[0043] The primary filter 9 uses a self-cleaning filter, spiral separator, or magnetic filter to separate different metal scales; the precision filter 10 is a precision filtration device that uses membrane filtration, paper bag filtration, or sand filtration to finely filter the remaining sediment and achieve the goal of water purification.

[0044] A mud collection tank 11 is connected to a primary water tank 12 by a collection tank outlet water pipe 11-1. A first overflow outlet 12-1 is connected to the side of the primary water tank 12, and a second overflow outlet 13-1 is connected to the side of the secondary water tank 13. The collection tank outlet water pipe 11-1 is used to supply water from the mud collection tank 11 to the primary water tank 12. The first overflow outlet 12-1 is used to drain water from the primary water tank 12 when the water level is too high. The overflow outlet 13-1 is used to drain water from the secondary water tank 13 when the water level is too high.

[0045] The first water pump 16 has its input and output ends connected to a first input pipe 16-1 and a first output pipe 16-2, respectively. The first input pipe 16-1 is connected to the collection tank 2-2, and the first output pipe 16-2 is connected to the primary water tank 12. The second water pump 17 has its input and output ends connected to a second input pipe 17-1 and a second output pipe 17-2, respectively. The second input pipe 17-1 is connected to the primary water tank 12, and the second output pipe 17-2 is connected to the primary filter 9. The third water pump 18 has its input and output ends connected to a third input pipe. 18-1 and the third output pipe 18-2, the third input pipe 18-1 is connected to the secondary water tank 13, the third output pipe 18-2 is connected to the flushing pipe 18-21 and the distribution pipe 18-22, the flushing pipe 18-21 is connected to the flushing ring 20, the drying ring 21 is equipped with a hot air conveying pipe 6, and the distribution pipe 18-22 is connected to the slurry distributor 8; the fourth water pump 19 is set in the receiving water tank 15, the output end of the fourth water pump 19 is connected to the fourth output pipe 19-2, and the fourth output pipe 19-2 is connected to the primary water tank 12. The fourth water pump 19 is a submersible pump. The first water pump 16 pumps water from the collection tank 2-2 through the first input pipe 16-1 and delivers it to the primary water tank 12 through the first output pipe 16-2. The second water pump 17 pumps water from the primary water tank 12 through the second input pipe 17-1 and delivers it to the primary filter 9 through the second output pipe 17-2. The third water pump 18 pumps water from the secondary water tank 13 through the third input pipe 18-1 and delivers it to the flushing ring 20 and the slurry distributor 8 through the flushing pipe 18-21 and the distribution pipe 18-22. The fourth water pump 19 pumps water from the collection tank 15 and delivers it to the primary water tank 12 through the fourth output pipe 19-2. The hot air delivery pipe 6 is used to deliver hot air to the drying ring 21.

[0046] In summary, when implementing this invention:

[0047] Example 1: See Figure 1As shown, to achieve timely removal of scale from the outer surface of the continuous casting billet body 14, the continuous casting billet body 14 placed on the roller conveyor 7 is horizontally advanced (optionally accompanied by rotational motion) to the descaling box 2; during the passage of the continuous casting billet body 14 through the descaling box 2, at least four launchers (first launcher 1-1, second launcher 1-2, and third and fourth launchers) fixedly installed inside it are driven by their respective motors (first drive motor 1-11, second drive motor 1-21, third drive motor 1-31, and fourth drive motor 1-41) to launch... High-speed mixed jets (first mixed jet 1-12, second mixed jet 1-22, third mixed jet 1-32, and fourth mixed jet 1-42) are emitted and impact the outer surface of the continuous casting billet body 14, achieving complete circumferential descaling of the outer surface of the continuous casting billet body 14 without any missed areas. After the continuous casting billet body 14 is descaled, it is successively pushed backward and enters the post-processing box 3. The box is subjected to continuous circumferential cleaning by the flushing ring 20 and drying and purging by the drying ring 21, which finally achieves descaling and drying of the outer surface of the continuous casting billet body 14, obtaining the clean surface required for the next process.

[0048] During the descaling process, the descaling tank 2 mainly produces three types of substances: water, abrasive particles, and scale. These three mixed slurries are agitated and churned in the collection tank 2-2. Large abrasive particles are conveyed to the abrasive pump 5 through the sand valve body 4. Simultaneously, the abrasive pump 5 pushes the large abrasive particles smoothly into the slurry inlet of the slurry distributor 8. At this time, the slurry distributor 8 also receives water from the third water pump 18, achieving multi-branch distribution output. The water is then distributed to two valves (first distributor valve 8-1 and second distributor valve 8-2) through the first distributor output pipe 8-1 and the second distributor output pipe 8-2, respectively. 1) and 2) distributor valves 8-21) output; the first distributor valve 8-11 and the second distributor valve 8-21 are opened under the control of their respective actuators (first valve actuator 8-12 and second valve actuator 8-22), and the distributed slurry is finally delivered to their respective emitters (first emitter 1-1 and second emitter 1-2) to realize the continuous jet injection and the recycling of abrasive media; for media exceeding the required amount, it flows out into the post-processing tank 3 (or descaling tank 2) through the fifth distributor output pipe 8-5 to realize the return flow.

[0049] Meanwhile, another portion of the slurry in the collection tank 2-2 is drawn in through the first input pipe 16-1 of the first water pump 16, and then output to the primary water tank 12 through the first output pipe 16-2. The primary water tank 12 receives the slurry and performs collection and separation. When the water level is too high, it drains water out through the first overflow outlet 12-1. The primary water tank 12 also uses the second water pump 17 to transport water to the primary filter 9 through the second output pipe 17-2. After the primary filter 9 performs forced separation of the water, it intercepts large particles or lumps of slurry through the first filter output pipe 9-1 and transports them to the mud collection tank 11. The other part of the water is transported to the precision filter 10 for more refined filtration. The process involves the following steps: After the mud collection tank 11 receives the blocky slurry output from the first filter output pipe 9-1, the excess water generated by its continuous static accumulation is discharged to the primary water tank 12 through the collection tank output water pipe 11-1, achieving complete water recycling. At the same time, when the precision filter 10 continuously processes the water input, it will select whether to process it through the precision filter 10 based on the differences in composition, scale characteristics, etc. of the continuous casting billet body 14. Therefore, a side branch pipe 10-2 and a branch valve 10-3 are added to achieve selective activation. Ultimately, the purified water is recycled through the precision filter output pipe 10-1 and enters the secondary water tank 13. When the water level is too high, the water is discharged outward through the overflow outlet 13-1.

[0050] Example 2 (see Figure 2 The process features two additional launchers on the basis of Example 1, adopting a four-launcher arrangement (first launcher 1-1, second launcher 1-2, third launcher 1-3 and fourth launcher 1-4), and adding slurry delivery pipes for the third launcher 1-3 and the fourth launcher 1-4 to connect to the slurry distributor 8 (first distributor output pipe 8-1, second distributor output pipe 8-2, third distributor output pipe 8-3 and fourth distributor output pipe 8-4); the first mixed jet 1-12, second mixed jet 1-22, third mixed jet 1-32 and fourth mixed jet 1-42 of each launcher are respectively aimed at each surface of the continuously cast billet body 14, and the corresponding surface is independently peeled and descaled.

[0051] Example 3 (see Figure 3 ( ): For a partial description of Example 2, at a certain accurate position along the length of the continuous casting billet body 14, the third emitter 1-3 and the first emitter 1-1 are arranged 180° opposite each other to remove the scale from the two opposite surfaces of the continuous casting billet body 14, so as to achieve the goal of force balance and ensure stable steel flow of the billet.

[0052] Example 4 (see Figure 4): For another partial description of Embodiment 2, at another precise position along the length of the continuous casting billet body 14, the second emitter 1-2 and the fourth emitter 1-4 are arranged 180° opposite each other, respectively, to remove the scale from the other two opposite surfaces of the continuous casting billet body 14, so as to achieve the goal of force balance and ensure stable steel flow of the billet.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cold surface descaling system for a continuously cast strand, characterized by: The continuous casting billet descaling device comprises a transmitter group (1), a descaling box (2), a collecting box (2-2), a post-processing box (3), a sand valve body (4), an abrasive pump (5), a slurry distributor (8), a primary filter (9), a precision filter (10), a mud storage box (11), a primary water tank (12), a secondary water tank (13), a storage water tank (15), a first water pump (16), a second water pump (17), a third water pump (18) and a fourth water pump (19). The transmitter group (1) is arranged on the descaling box (2), the post-processing box (3) is arranged on the side of the descaling box (2), the descaling box (2) and the post-processing box (3) are both provided with a roller (7), the roller (7) is provided with a continuous casting billet body (14), the collecting box (2-2) is arranged below the descaling box (2), the post-processing box (3) is provided with a flushing ring (20) and a drying ring (21), the sand valve body (4) is installed below the collecting box (2-2), the abrasive pump (5) is installed below the sand valve body (4), the slurry distributor (8) is connected with the abrasive pump (5), the slurry distributor (8) is connected with the transmitter group (1) and the post-processing box (3); the collecting box (2-2) outputs to the primary water tank (12) through the first water pump (16), the storage water tank (15) outputs to the primary water tank (12) through the fourth water pump (19), and the mud storage box (11) outputs to the primary water tank (12); the primary water tank (12) outputs to the primary filter (9) through the second water pump (17), the primary filter (9) outputs to the precision filter (10) and the mud storage box (11), the precision filter (10) outputs to the secondary water tank (13), and the secondary water tank (13) outputs to the flushing ring (20) and the slurry distributor (8) through the third water pump (18).

2. A cold stripper system for a continuously cast billet according to claim 1, characterized in that: The transmitter group (1) comprises a first transmitter (1-1), a second transmitter (1-2), a third transmitter (1-3) and a fourth transmitter (1-4), the first transmitter (1-1) is provided with a first driving motor (1-11), the second transmitter (1-2) is provided with a second driving motor (1-21), the third transmitter (1-3) is provided with a third driving motor (1-31), and the fourth transmitter (1-4) is provided with a fourth driving motor (1-41); the descaling box (2) is provided with a first mixed jet (1-12), a second mixed jet (1-22), a third mixed jet (1-32) and a fourth mixed jet (1-42), and the first mixed jet (1-12), the second mixed jet (1-22), the third mixed jet (1-32) and the fourth mixed jet (1-42) correspond to the first transmitter (1-1), the second transmitter (1-2), the third transmitter (1-3) and the fourth transmitter (1-4) respectively.

3. A cold stripper system for a continuously cast billet as claimed in claim 1, characterized in that: The raw material inlet (2-1) is arranged on the side of the descaling box (2) away from the post-treatment box (3), and the isolation guard (2-3) is arranged between the descaling box (2) and the post-treatment box (3) and fixed.

4. A system for descaling the surface of a continuously cast billet as defined in claim 1, characterized in that: The sand valve body (4) is connected with the sand valve driver (4-1), and the abrasive pump (5) is connected with the slurry distributor (8) through the pump output pipe (5-1).

5. A cold stripper system for continuously cast slabs as claimed in claim 1, characterized in that: The slurry distributor (8) is provided with a first distributor output pipe (8-1), a second distributor output pipe (8-2), a third distributor output pipe (8-3), a fourth distributor output pipe (8-4) and a fifth distributor output pipe (8-5), the first distributor output pipe (8-1) is connected with the first distributor valve (8-11), the first distributor valve (8-11) is connected with the first emitter (1-1), and the first distributor valve (8-11) is connected with the first valve driver (8-12); the second distributor output pipe (8-2) is connected with the second distributor valve (8-21), the second distributor valve (8-21) is connected with the second emitter (1-2), and the second distributor valve (8-21) is connected with the second valve driver (8-22); the third distributor output pipe (8-3) is connected with the third distributor valve (8-31), the third distributor valve (8-31) is connected with the third emitter (1-3), and the third distributor valve (8-31) is connected with the third valve driver (8-32); the fourth distributor output pipe (8-4) is connected with the fourth distributor valve (8-41), the fourth distributor valve (8-41) is connected with the fourth emitter (1-4), and the fourth distributor valve (8-41) is connected with the fourth valve driver (8-42); the fifth distributor output pipe (8-5) is connected with the post-treatment box (3).

6. A cold stripper system for continuously cast slabs as defined in claim 1, characterized in that: The first filter (9) is connected with the first filter output pipe (9-1) and the second filter output pipe (9-2), the first filter output pipe (9-1) is connected with the slurry storage box (11), and the second filter output pipe (9-2) is connected with the precision filter (10).

7. A cold stripper system for continuously cast slabs as defined in claim 1, characterized in that: The precision filter (10) is provided with the precision filter output pipe (10-1) and the branch pipe (10-2), the branch pipe (10-2) and the precision filter output pipe (10-1) are in communication, the branch pipe (10-2) is connected with the second filter output pipe (9-2), the precision filter output pipe (10-1) is connected with the secondary water tank (13), and the branch pipe (10-2) is provided with the branch pipe valve (10-3).

8. A cold stripper system for a continuously cast billet as defined in claim 1, characterized in that: The first filter (9) is a self-cleaning filter, a spiral separator or a magnetic filter, and is used for separating different metal scales; and the precision filter (10) is a precision filtering device, and is used for fine filtering treatment of residual precipitates in a membrane filtering, paper bag filtering or sand filtering mode.

9. A cold stripper system for continuously cast slabs as defined in claim 1, characterized in that: The mud storage box (11) is connected with a storage box output water pipe (11-1) and a first overflow discharge port (12-1) is connected to the side of the first water tank (12), and a second overflow discharge port (13-1) is connected to the side of the second water tank (13).

10. A cold stripper system for continuously cast slabs as claimed in claim 1, characterized in that: The input end and the output end of the first water pump (16) are respectively connected with a first input pipe (16-1) and a first output pipe (16-2), the first input pipe (16-1) is connected with the collection box (2-2), and the first output pipe (16-2) is connected with the first water tank (12); the input end and the output end of the second water pump (17) are respectively connected with a second input pipe (17-1) and a second output pipe (17-2), the second input pipe (17-1) is connected with the first water tank (12), and the second output pipe (17-2) is connected with the first filter (9); the input end and the output end of the third water pump (18) are respectively connected with a third input pipe (18-1) and a third output pipe (18-2), the third input pipe (18-1) is connected with the second water tank (13), and the third output pipe (18-2) is connected with a flushing pipe (18-21) and a distribution pipe (18-22), the flushing pipe (18-21) is connected with the flushing ring (20), a hot air conveying pipe (6) is arranged on the drying ring (21), and the distribution pipe (18-22) is connected with the slurry distributor (8); the fourth water pump (19) is arranged in the storage water tank (15), the output end of the fourth water pump (19) is connected with a fourth output pipe (19-2), and the fourth output pipe (19-2) is connected with the first water tank (12).

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