A new type of stainless steel slag hot braising treatment method

Abstract

The application discloses a novel hot stewing treatment mode of stainless steel slag, and comprises the following steps: S1, pretreatment: crushing large slag lumps in the stainless steel slag to below 500 mm, wherein the deironing slag lumps are crushed to below 300 mm; separating large slag steel and removing; mixing electric furnace slag, AOD steel slag and ladle slag into a pool; S2, checking before entering the pool: checking the hot stewing device, ensuring that there is no accumulated water in the pool, the water seal groove and the pool wall are intact, the equipment instruments and the control system are normally operated, and the hidden danger on the site is cleaned; S3, material distribution and crushing: crushing the surface hardening layer when the steel slag enters the pool, crushing the large hard shell to below 500 mm after entering the pool, and controlling the proportion of 500-1000 mm slag blocks to be within 10%; through the process of entering the pool and transferring to the special pool for hot stewing, the red slag waste heat is utilized to rapidly reduce the temperature of the steel slag from 1000 DEG C to below 700 DEG C, and the hardening structure of the slag lumps is effectively destroyed. This enables the cooling water to flow smoothly to the bottom of the pool, and avoids the severe explosion accidents caused by the high-temperature liquid slag not being cooled and encountering the normal-temperature stewing slag water when the slag is discharged from the pool.

Description

Technical Field

[0001] This invention relates to the field of hot slag treatment technology for metallurgical steel slag, specifically a novel hot slag treatment method for stainless steel slag. Background Technology

[0002] Currently, the main process for treating stainless steel slag involves directly dumping the high-temperature, hot steel slag produced in steel mills into a hot quenching tank. Large pieces of slag are then crushed in the tank with a hammer, and the tank is covered with a hot quenching cover. A water spray system at the top of the cover intermittently sprays water onto the slag, utilizing the residual heat of the slag to generate a large amount of steam, which rapidly dissolves the f-CaO and f-MgO in the slag, causing it to crumble and pulverize. However, the viscous nature of liquid stainless steel slag makes it prone to caking during slow cooling without human intervention. Therefore, each batch requires hammering, tapping, and digging to help dislodge the slag. Furthermore, due to its tendency to caking, secondary crushing with hammers is necessary after it enters the tank, followed by water injection and agitation by an excavator. The existing process cannot cool the slag quickly enough, leading to risks of red-hot slag splashing and even explosions during the treatment of stainless steel slag. Summary of the Invention

[0003] The purpose of this invention is to provide a novel hot slag treatment method for stainless steel slag, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A novel hot slag treatment method for stainless steel includes the following steps:

[0005] S1. Pretreatment: Crush large slag lumps in stainless steel slag to below 500mm, with de-iron slag lumps crushed to below 300mm; separate and remove large slag lumps; mix electric furnace slag, AOD steel slag and runway slag into the pool;

[0006] S2. Pre-entry inspection: Inspect the hot sealing device to ensure that there is no water accumulation in the pool, the water seal trough and pool walls are intact, the equipment, instruments and control system are operating normally, and eliminate potential hazards on site;

[0007] S3. Material feeding and crushing: When steel slag is put into the pool, the hardened surface layer is crushed. After entering the pool, the large hard shell pieces are crushed to below 500mm, and the proportion of slag pieces of 500-1000mm is controlled to be within 10%.

[0008] S4. Transfer and loading: Transfer the steel slag to the hot curing tank, fill it according to the predetermined number of tanks and spread it out.

[0009] S5. Intermittent water pumping: Perform at least one water pumping operation, with the water flow rate controlled at tens of cubic meters per hour. After pumping water for 1-2 hours, stop simmering for 1-2 hours.

[0010] S6. Secondary water injection and slag removal: Water is injected a second time according to the humidity of the slag. The hardened dry slag is broken down to less than 500mm. Water is injected until a shallow layer of water is formed on the surface of the slag. After the water has seeped in and there is no standing water, the slag is stirred and removed.

[0011] Preferably, the de-iron slag clump in S1 is crushed to between 250mm and 300mm to ensure the sufficiency of the subsequent hot simmering reaction.

[0012] Preferably, in S1, if large slag lumps cannot be crushed immediately, they should be processed after the steel slag has completely cooled naturally. The processing method is as follows: for slag lumps with large metal cores, it is forbidden to forcibly crush them at high temperatures. It is necessary to wait for the internal metal phase to completely cool and shrink and separate from the slag shell before processing to prevent the risk of explosion.

[0013] Preferably, in step S4, after the steel slag is loosened by the excavator, it is transferred to a special hot quenching tank and put into the tank according to the standard of tanks 2, 2, and 3, and the adjustment is made according to the actual amount of slag.

[0014] The adjustment of the actual slag quantity includes adjusting the amount of slag entering a single pool to 3 pools when the slag tank is not full or the slag quantity is small; when the slag quantity is large, the red slag is used as a base for baking in adjacent hot curing pools.

[0015] Preferably, the water flow control in S5 includes a first water flow control and a second water flow control, wherein the range of the first water flow control is 20~30 m³ / h and the range of the second water flow control is 5~15 m³ / h.

[0016] Preferably, the second water injection is stopped after the surface of the slag is covered with 10-20cm of water.

[0017] Preferably, step S5 further includes handling abnormal water accumulation, specifically:

[0018] When there is too much water on the surface of the slag, use dry slag to absorb the water or make holes with a depth of more than 30cm in the pool to drain the water.

[0019] If splashing occurs, suspend operations and resume operations after the boiling subsides.

[0020] Preferably, in step S6, when water is pumped to the surface of the slag to form a shallow layer of water, the thickness of the water layer is controlled to be 10-20cm, and the dry slag at the bottom needs to be pumped with water repeatedly.

[0021] As a preferred option, a special treatment step is also included for cases where a large amount of water accumulates on the slag surface:

[0022] Water absorption is achieved using dry red residue that is free of large pieces and liquid.

[0023] Alternatively, make 5-7 holes with a depth of 45-55cm or more at the four corners and the middle of the pool to accelerate drainage;

[0024] If the splashing is severe, the pool must be shut down and operations can only resume after the water on the slag surface has stopped boiling significantly.

[0025] As a preferred option, slag discharge determination and maintenance steps are also included:

[0026] When there is a small amount of water, first poke a hole to let the water seep out, let it stand until the surface water dries, and then stir and drain the water from the pool from shallow to deep.

[0027] If there is localized hardening or red slag, after crushing, add water until a small amount of water can be seen on the slag surface, let it dry, and then remove the slag.

[0028] Large pieces of red slag must not be loaded onto trucks. After slag is discharged, clean the bottom of the pool and the water seal trough to ensure that the water supply pipes are unobstructed, the valves are free from leaks, and repair any damaged slag-sealing pool guard plates in a timely manner.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] By using a process of introducing steel slag into the pool and transferring it to a dedicated hot quenching pool, the residual heat of the red slag is utilized to rapidly cool the steel slag from 1000℃ to below 700℃, effectively breaking down the slag clump's compacted structure. This allows the cooling water to flow smoothly to the bottom of the pool, preventing violent explosions caused by the uncooled, high-temperature liquid slag encountering room-temperature quenching water upon exiting the pool.

[0031] The method employs a combination of primary water cooling and secondary water pulverization. Primary water cooling enables rapid material cooling, while secondary water cooling ensures that the steel slag is fully self-decomposed and pulverized without any red slag residue. By replenishing water in small amounts multiple times, the vapor film on the slag surface is continuously broken, significantly increasing the contact area and heat exchange efficiency between the steel slag and cooling water, resulting in a stable steel slag pulverization rate of over 90%.

[0032] Compared to traditional processes, the cycle time for a single operation is reduced by approximately 4 hours. This not only directly improves the efficiency of slag processing but also provides valuable buffer time for equipment inspection and maintenance, enhancing the flexibility of production organization.

[0033] This method effectively controls heat radiation and dust during the hot curing process. Practical application shows that the ambient temperature inside the factory can be reduced from 70℃ to about 50℃, and the dust concentration is significantly reduced, greatly improving the working environment for on-site workers. Attached Figure Description

[0034] Figure 1 This is a scatter plot of water volume-duration-pulverization rate for the present invention.

[0035] Figure 2 This is the fitted data of steel slag pulverization rate and residual water ratio in this invention. Figure 1 ;

[0036] Figure 3 This is the fitted data of steel slag pulverization rate and residual water ratio in this invention. Figure 2 . Detailed Implementation

[0037] 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.

[0038] Please see Figures 1-2 This invention provides a technical solution: a novel hot slag treatment method for stainless steel slag, comprising the following steps:

[0039] Before stainless steel slag is put into the pool, large slag lumps must be crushed to below 500mm with a hammer (iron removal slag lumps must be crushed to below 250mm). Large slag lumps that are clearly visible must be separated and moved to a special storage area. If large slag lumps of steel strip cannot be crushed immediately, they must be processed after the steel slag has completely cooled naturally. Various types of steel slag, such as electric furnace slag, AOD steel slag, and slag from the slag yard, must be mixed relatively evenly before being put into the pool.

[0040] S200. Before entering the pool, the hot curing device must be inspected to ensure that there is no standing water in the pool (follow the red slag baking regulations, confirm with red slag from the adjacent hot curing pool and lay it dry), the water seal trough is free of debris, and the steel billets on the pool wall are not missing or broken off. At the same time, check that the instruments, pumps, valves, flow meters (must be in the starting state), crane remote control, lifting tools and other equipment of the water supply and drainage system are normal. The main control operator confirms that there are no alarm abnormalities on the intelligent water pumping operation screen. Unauthorized personnel must be cleared from the site, flammable and explosive materials around the tank turning area must be removed, and production maintenance machinery must be parked more than 20 meters away from the curing pool and free of standing water around it. Clean the slag and debris in the water seal trough.

[0041] S300. Steel slag is placed in a dedicated pool. Before being placed in the pool, the hardened layer of steel slag on the surface of the slag pot is broken up with a hammer. It is poured in slowly to prevent splashing. After each batch is filled, large solid shells are broken down to below 500mm (500-1000mm does not exceed 10%). After the last batch is broken, it is loosened by an excavator, transported to the adjacent hot curing pool and leveled.

[0042] S400. Confirm that the steel slag is crushed and mixed in place. Use an excavator to transfer the steel slag in the pool to the hot curing pool. Each pool is filled with 2, 2, or 3 tanks of slag (the amount can be adjusted according to the amount of slag). Use a water cannon to pump water once at a flow rate of 25 (±1) m³ / h for 1 hour, and then stop curing for 1 hour.

[0043] S500. Secondary water injection (replenishment) should be considered based on the condition of the slag after the first water injection. First, reduce the hardened dry slag in the crushing tank to below 500mm, adjust the water flow rate to 5-10m³ / h, and inject water until the slag surface is covered with 10-20cm of water. Then stop and wait for the water to seep down and there is no obvious water accumulation before mixing and loading. The bottom dry slag can be repeatedly replenished with water, but in small amounts and multiple times.

[0044] S600. When there is a large amount of water on the slag surface, use dry red slag without large pieces or liquid to absorb the water, or make 6 holes with a depth of more than 50cm in the four corners and the middle of the pool. If the splashing is serious, the pool should be stopped and the operation should be carried out after the water on the slag surface has stopped boiling. If there is a small amount of water, first make holes to let the water seep in, let it stand until the surface water dries, and then stir and turn it out of the pool from shallow to deep. If there is local hardening or red slag, it should be broken up and water should be added until a small amount of water can be seen on the slag surface. Let it dry before removing the slag.

[0045] S700. Large pieces of red slag are prohibited from being loaded onto trucks. After slag discharge, the bottom of the pool and the water seal tank must be cleaned of accumulated slag. Throughout the process, all types of water supply pipes must be kept unobstructed, valves must be free of leaks, electromagnetic flow meters must be accurate, and the intelligent water injection control system must be functioning normally. The amount of stainless steel slag loaded into the pool must be strictly controlled. Damaged slag-sealing pool guard plates must be reported and repaired in a timely manner. Original records of water injection operations must be kept in accordance with the prescribed format to ensure that all process requirements are implemented.

[0046] Example

[0047] Ensure the incoming slag temperature is around 900℃ to guarantee a steel slag pulverization rate greater than 90%, meeting the process quality requirements. Furthermore, no drainage outlet is installed in the slag-curing tank; the remaining water volume must be less than 10% to ensure a dry environment in the tank for the next operation.

[0048] A shallow pan, 1001mm deep, 2930mm long, and 1570mm wide, was constructed to simulate a slag-smelting pit. Steel slag was crushed using an excavator and hammer to simulate a rolling process and then poured into the shallow pan. Water was then sprayed through a spraying device. The water spraying process parameters for slag of different thicknesses were statistically analyzed to determine the optimal water-slag ratio.

[0049] Example 1: Optimization of steel slag pulverization rate (the ratio of steel slag with a diameter less than 100 mm to the total mass).

[0050] S100, Pretreatment: Take 5 tons of electric arc furnace slag, AOD slag, and runner slag, and crush them using an excavator and hammer to simulate a rolling process, screening out slag lumps larger than 500mm. Ensure that the de-ironized slag lumps are crushed to below 250mm, and uniformly mix the various types of steel slag.

[0051] S200, Pre-entry inspection: Construct a simulated slag-simmering tank (without a drain outlet) with a depth of 1001mm, a length of 2930mm, and a width of 1570mm. Ensure the tank is dry and free of residual water before operation.

[0052] S300, Fabrication and Primary Crushing: Pour the mixed slag into a shallow pan, and after entering the tank, break up the hardened surface layer, controlling the proportion of slag lumps of 500-1000mm to not exceed 10%.

[0053] S400, single water injection: 56 arithmetic sequence combinations with design water volume of 1-1.25-1.5-1.75-2-2.25-2.5-3t and duration of 0.5-3.5h. Water injection is performed to simulate a large industrial flow rate (mapping to an industrial level of 25t / h), followed by a simulated simmering period of 1 hour.

[0054] S500, Secondary Water Pumping, and S600 Anomaly Handling: Observation revealed that a large amount of water accumulated on the slag surface under certain operating conditions. According to the S600 procedure, drainage was carried out by tamping holes to a depth of more than 50cm to avoid splashing.

[0055] S700, Slag Discharge and Result Statistics: Inspection is conducted after the operation is completed.

[0056] Example 2: Control of Remaining Water Volume (Ratio of Water Volume After Operation to Total Water Volume)

[0057] Experiments were conducted using the above methods to observe the percentage of remaining water under different water volumes and durations.

[0058] The results of Examples 1 and 2 are shown in the table below:

[0059] Water volume duration 1t 1.25t 1.5t 1.75t 2t 2.25t 2.5t 3t 0.5h 43.2% 48.9% 54.1% 58.6% 63.3% 66.7% 69.8% 73.2% 1h 46.6% 52.5% 55.1% 59.9% 66.8% 73.2% 75.8% 76.4% 1.5h 53.9% 56.5% 63.2% 68.1% 73.5% 78.4% 81.1% 82.4% 2h 61.5% 66.9% 71.2% 78.5% 85.8% 88.4% 90.5% 90.5% 2.5h 68.7% 68.4% 76.2% 82.8% 89.4% 90.1% 91.1% 91.1% 3h 72.2% 76.4% 79.9% 83.9% 90.1% 91.2% 91.4% 91.6% 3.5h 74.7% 78.5% 82.3% 87.4% 90.8% 91.4% 91.7% 92.2%

[0060] Results of steel slag pulverization rate

[0061] Water volume duration 1t 1.25t 1.5t 1.75t 2t 2.25t 2.5t 3t 0.5h 0.0% 0.0% 0.0% 13.0% 15.0% 22.0% 26.0% 29.0% 1h 0.0% 0.0% 0.0% 0.0% 6.0% 18.0% 19.0% 24.0% 1.5h 0.0% 0.0% 0.0% 0.0% 0.0% 15.0% 18.0% 22.0% 2h 0.0% 0.0% 0.0% 0.0% 0.0% 9.0% 12.0% 18.0% 2.5h 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 7.0% 11.0% 3h 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 8.0% 3.5h 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%

[0062] Results of the percentage of remaining water

[0063] A spatial scatter plot of the pulverization rate was established, and a spatial surface plot of the pulverization rate and the remaining water volume was fitted using cubic spline interpolation. Based on the surface plot, an optimization objective was established with "the highest pulverization rate of steel slag and the lowest proportion of remaining water volume, with a weight of 4:1". The results were: duration 2.136h, water volume 2.563t, steel slag pulverization rate 91.36%, and remaining water volume 4.67%.

[0064] Example 3: Production Experiment

[0065] S100, Pretreatment: Pour the stainless steel slag from the two slag pots (approximately 60 tons) into the hot curing tank. Immediately after each pot is poured in, perform step S100, using a hammer to break the slag clumps to below 500mm (ensuring that slag clumps of 500-1000mm do not exceed 10%), and confirm that the electric furnace slag, AOD slag, and slag are mixed evenly.

[0066] S200. Pre-entry inspection: Follow the red slag baking regulations, and use the red slag from the adjacent hot-baking tank to confirm that there is no water accumulation in this tank and that the slag padding is dry. Check the water supply and drainage system, flow meter (initial state), and intelligent water dispensing operation screen to confirm that there are no alarms.

[0067] S300, Fabric and Primary Crushing: Before entering the tank, break up the hardened layer on the surface of the slag pot and pour it in slowly to prevent splashing.

[0068] S400, One-time water injection: After loading the slag, the excavator mixes the red slag and transfers it to the adjacent preheated hot curing tank. The intelligent water injection system is started, injecting water at a flow rate of 25 (±1) t / h for 1 hour, followed by a 1-hour curing stop.

[0069] S500, Secondary Water Injection: Observe the slag condition. The slag surface is covered with about 10-20cm of water. When the water has seeped down and there is no obvious water accumulation, prepare to remove the slag.

[0070] S600, Abnormal Handling: No serious splashing occurred during the operation, and no special drainage treatment was required.

[0071] S700, Slag Removal and Maintenance: Test results showed that the steel slag pulverization rate was 90.6%, and the remaining water volume accounted for 7.3%. After slag removal, the bottom of the pool and the water seal trough were cleaned of accumulated slag, and the data were recorded. The results met the process quality requirements specified in S700.

[0072] After the slag is loaded, the excavator mixes the red slag and then transfers the red slag in this hot curing tank to an adjacent hot curing tank (the hot curing tank after the red slag has been baked); water is pumped at a rate of 25t / h for 1 hour, with a total flow rate of (24.5-25.5t); after the water pumping is completed, the slag is cured for 1 hour. After the operation is completed, the steel slag pulverization rate is tested to be 90.6%, and the remaining water volume accounts for 7.3%.

[0073] Comparative example:

[0074] S100, Pretreatment Deviation: Only single electric furnace slag was used, and AOD slag and mador slag were not mixed (violating the S100 requirement for mixing before entering the pool). The slag clumps were not thoroughly broken up, and there were a large number of slag clumps larger than 500mm.

[0075] S200, Safety inspection missing: Red slag baking was not carried out in the slag curing tank, and water (about 5%) from the previous operation remained at the bottom of the tank.

[0076] S300, Material Issue: The hardened layer of slag was not broken up when it was put into the pool, and the slag was poured out too quickly, causing splashing.

[0077] S400, Water Discharge Uncontrolled: Intermittent water discharge was not used. A constant high flow rate (40t / h, exceeding the 25±1 range specified in S400) was used for continuous water discharge for 2 hours.

[0078] S500-S600 Improper handling: A large amount of water accumulates on the slag surface. Drainage is not carried out as required by S600, resulting in water retention.

[0079] S700, Result: After the operation, the pulverization rate of steel slag was only 72.4% (far below 90%), and the remaining water content was as high as 18.5% (far exceeding the safety line of 10%). Due to the excessive amount of remaining water, additional manual drainage and drying were required before the next round of operation, which seriously affected the efficiency of the operation and brought about safety hazards.

[0080] Comparative Data Analysis Table

[0081] Steel slag pulverization rate 90.6% 72.4% Due to improper mixing and excessively rapid water injection, the thermal stress distribution was uneven, large slag lumps were not completely pulverized, and the core remained hard. Remaining water volume percentage 7.3% 18.5% Excessive flow rate and failure to control the simmering rhythm prevent water from evaporating or permeating in time, resulting in a large amount of water stagnating at the bottom of the pool. Slag particle size <500mm is dominant >500mm high proportion The lack of hammer crushing and excavator turning resulted in large slag lumps becoming extremely hard after cooling, increasing subsequent crushing costs. Impact on the next pool The pool walls are dry and ready for direct operation. Manual drainage / drying is required. The remaining water volume of 18.5% far exceeds the safety threshold of 10%. If not dealt with, the next batch of red slag entering the pool will trigger a violent explosion. Testing items Example 3 Comparative Example 1 Difference analysis Steel slag pulverization rate 90.6% 72.4% Due to improper mixing and excessively rapid water injection, the thermal stress distribution was uneven, large slag lumps were not completely pulverized, and the core remained hard. Remaining water volume percentage 7.3% 18.5% Excessive flow rate and failure to control the simmering rhythm prevent water from evaporating or permeating in time, resulting in a large amount of water stagnating at the bottom of the pool.

[0082] 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 novel method for hot slag treatment of stainless steel, characterized in that, Includes the following steps: S1. Pretreatment: Crush large slag lumps in stainless steel slag to below 500mm, with de-iron slag lumps crushed to below 300mm; separate and remove large slag lumps; mix electric furnace slag, AOD steel slag and runway slag into the pool; S2. Pre-entry inspection: Inspect the hot sealing device to ensure that there is no water accumulation in the pool, the water seal trough and pool walls are intact, the equipment, instruments and control system are operating normally, and eliminate potential hazards on site; S3. Material feeding and crushing: When steel slag is put into the pool, the hardened surface layer is crushed. After entering the pool, the large hard shell pieces are crushed to below 500mm, and the proportion of slag pieces of 500-1000mm is controlled to be within 10%. S4. Transfer and loading: Transfer the steel slag to the hot curing tank, fill it according to the predetermined number of tanks and spread it out. S5. Intermittent water pumping: Perform at least one water pumping operation, with the water flow rate controlled at tens of cubic meters per hour. After pumping water for 1-2 hours, stop simmering for 1-2 hours. S6. Secondary water injection and slag removal: Water is injected a second time according to the humidity of the slag. The hardened dry slag is broken down to less than 500mm. Water is injected until a shallow layer of water is formed on the surface of the slag. After the water has seeped in and there is no standing water, the slag is stirred and removed.

2. The novel hot slag treatment method for stainless steel slag according to claim 1, characterized in that: The iron-removing slag in S1 is broken into pieces between 250mm and 300mm to ensure the sufficiency of the subsequent hot simmering reaction.

3. The novel hot slag treatment method for stainless steel slag according to claim 1, characterized in that: In S1, if large slag lumps cannot be crushed immediately, they should be processed after the steel slag has completely cooled naturally. The processing method is as follows: for slag lumps with large metal cores, it is forbidden to forcibly crush them at high temperatures. It is necessary to wait for the internal metal phase to completely cool and shrink and separate from the slag shell before processing to prevent the risk of explosion.

4. The novel hot slag treatment method for stainless steel slag according to claim 1, characterized in that: In step S4, after being loosened by an excavator, the steel slag is transported to a special hot quenching tank and put into the tank according to the standard of tanks 2, 2, and 3, and the amount of slag is adjusted according to the actual amount of slag. The adjustment of the actual slag quantity includes adjusting the amount of slag entering a single pool to 3 pools when the slag tank is not full or the slag quantity is small; when the slag quantity is large, the red slag is used as a base for baking in adjacent hot curing pools.

5. A novel hot-quenching treatment method for stainless steel slag according to claim 1, characterized in that: The water flow control in S5 includes a first water flow control and a second water flow control. The range of the first water flow control is 20~30 m³ / h, and the range of the second water flow control is 5~15 m³ / h.

6. A novel hot-quenching treatment method for stainless steel slag according to claim 5, characterized in that: The second watering is stopped after the surface of the slag is covered with 10-20cm of water.

7. A novel hot slag treatment method for stainless steel slag according to claim 1, characterized in that: S5 also includes the handling of abnormal water accumulation, specifically: When there is too much water on the surface of the slag, use dry slag to absorb the water or make holes with a depth of more than 30cm in the pool to drain the water. If splashing occurs, suspend operations and resume operations after the boiling subsides.

8. A novel hot slag treatment method for stainless steel slag according to claim 1, characterized in that: In step S6, when water is pumped to the surface of the slag to form a shallow layer of water, the thickness of the water layer is controlled to be 10-20cm, and the dry slag at the bottom needs to be pumped with water repeatedly.

9. A novel hot slag treatment method for stainless steel slag according to claim 1, characterized in that: It also includes special treatment steps for large amounts of water accumulating on the slag surface: Water absorption is achieved using dry red residue that is free of large pieces and liquid. Alternatively, make 5-7 holes with a depth of 45-55cm or more at the four corners and the middle of the pool to accelerate drainage; If the splashing is severe, the pool must be shut down and operations can only resume after the water on the slag surface has stopped boiling significantly.

10. A novel hot-quenching treatment method for stainless steel slag according to claim 1, characterized in that: It also includes slag discharge judgment and maintenance steps: When there is a small amount of water, first poke a hole to let the water seep out, let it stand until the surface water dries, and then stir and drain the water from the pool from shallow to deep. If there is localized hardening or red slag, after crushing, add water until a small amount of water can be seen on the slag surface, let it dry, and then remove the slag. Large pieces of red slag must not be loaded onto trucks. After slag is discharged, clean the bottom of the pool and the water seal trough to ensure that the water supply pipes are unobstructed, the valves are free from leaks, and repair any damaged slag-sealing pool guard plates in a timely manner.

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