Hot-metal ladle co-processing system and method integrating scrap steel adding and out-of-furnace desulfurization

Abstract

The invention discloses a hot-metal ladle cooperative processing system and method integrating scrap steel adding and out-of-furnace desulfurization, and belongs to the technical field of metallurgical process and equipment control. The hot-metal ladle cooperative processing system comprises an intelligent cooperative control module used for receiving temperature, sulfur content and scrap steel characteristic data of a multi-parameter sensing module and sending the temperature, sulfur content and scrap steel characteristic data to the multi-parameter sensing module; synchronously determining the adding rhythm of the waste steel and the injection parameters of the desulfurizing agent based on a cooperative control strategy, and alternately carrying out the adding of the waste steel and the desulfurization injection; the graded scrap steel treatment module comprises a screening assembly, a gradient preheating bin and a self-adaptive conveying mechanism; the precise desulfurization device comprises a metering conveying mechanism and a blowing device, and the multi-parameter sensing module is used for acquiring the temperature and the sulfur content of the molten iron and acquiring the granularity / bulk density of the scrap steel and the position information of the molten iron tank. According to the method, cooperative control of scrap steel adding and out-of-furnace desulfurization is achieved in the same hot-metal bottle, an adding and blowing alternate operation mode is formed, secondary transfer and heat loss caused by a traditional separation procedure are avoided, and the heat energy utilization efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metallurgical process and equipment control, and particularly relates to a molten iron tank collaborative treatment system and method integrating scrap steel addition and off-furnace desulfurization. BACKGROUND

[0002] In the steelmaking production process, molten iron desulfurization and scrap steel addition are two important off-furnace treatment processes. The traditional process flow usually separates scrap steel addition and molten iron desulfurization into two independent links: first, scrap steel is added and mixed in a molten iron tank or a mixing furnace, and then the molten iron is transferred to a special desulfurization device for injection desulfurization. Although this process is mature, it has obvious problems of energy consumption and efficiency. Because the two processes are separated, the heat loss of the molten iron is large during transportation and residence, and the temperature drop is usually more than 50℃. At the same time, the temperature drop generated during the addition of scrap steel will affect the kinetic conditions of the subsequent desulfurization reaction, causing the utilization rate of the desulfurizer to decrease and the desulfurization time to extend.

[0003] In addition, there is a lack of effective parameter linkage between the amount of scrap steel added and the amount of desulfurizer used in the prior art. The sulfur content, particle size, and temperature drop of the scrap steel itself are not corrected in real time in the desulfurization calculation, causing the desulfurizer dosage to deviate, and easily causing problems such as unstable sulfur content control, insufficient desulfurization, or excessive injection. The existing molten iron desulfurization control system is mostly one-way measurement and control, and cannot realize the collaborative response of the characteristics of scrap steel, temperature changes, and sulfur balance state, resulting in system control lag, high energy consumption, and low automation level.

[0004] At the same time, the scrap steel preheating and adding process generally lacks hierarchical management, and the preheating temperature and addition rate cannot be dynamically matched according to the particle size of the scrap steel, which easily causes local supercooling or insufficient preheating; the dust generated during the desulfurization process is mostly discharged through a single dust removal device, and cannot be recycled.

[0005] Therefore, how to realize the collaborative control of scrap steel addition and off-furnace desulfurization in the molten iron tank, consider temperature, sulfur content, and energy consumption factors in the same system, and realize automatic, intelligent, and integrated comprehensive treatment has become a technical problem urgently needed to be solved in the metallurgical industry. SUMMARY

[0006] The purpose of the present application is to provide a molten iron tank collaborative treatment system and method integrating scrap steel addition and off-furnace desulfurization, to solve the technical problems of large temperature drop, high energy consumption, control lag, and low desulfurization efficiency caused by the separation of existing molten iron desulfurization and scrap steel addition.

[0007] In order to achieve the above purpose, the present application provides the following technical scheme: A molten iron tank collaborative treatment system integrating scrap steel addition and off-furnace desulfurization, comprising: The intelligent collaborative control module is configured to receive the temperature, sulfur content and scrap steel characteristic data of the multi-parameter sensing module, synchronously determine the adding rhythm of the scrap steel and the injection parameters of the desulfurizer based on the collaborative control strategy, and make the scrap steel adding and the desulfurizer injection be performed in an alternating manner. The hierarchical scrap steel processing module comprises a screening assembly for grading the scrap steel according to the particle size, a gradient preheating bin for preheating the scrap steel of different particle sizes, and an adaptive conveying mechanism for quantitatively adding the preheated scrap steel into the ladle. The precise desulfurization device comprises a metering conveying mechanism and an injection device, and the injection device is used for sending the desulfurizer into the molten iron and stirring and mixing the desulfurizer with the molten iron. The multi-parameter sensing module is used for acquiring the temperature and sulfur content of the molten iron, and acquiring the particle size / density and the position information of the ladle. The intelligent collaborative control module is configured to: calculate the desulfurizer adding amount and injection intensity in linkage with the sulfur carrying amount of the scrap steel and the temperature state of the molten iron, coordinate the alternating actions of the adaptive conveying mechanism and the injection device, and terminate the corresponding operation when the target sulfur content or the cumulative adding of the scrap steel meets the standard.

[0008] Preferably, the gradient preheating bin comprises multiple independent temperature control preheating zones corresponding to coarse material, medium material and fine material respectively, and the target temperature intervals of each independent temperature control preheating zone are different, so as to realize differential preheating of scrap steel of different particle sizes during use.

[0009] Preferably, the adaptive conveying mechanism is a magnetic control belt, and the surface of the magnetic control belt is provided with an electromagnetic adsorption unit for adjusting the adsorption force of different particle sizes of scrap steel, and a weight on-line detector is arranged at the end of the belt for closed-loop control of the adding amount.

[0010] Preferably, the precise desulfurization device comprises a preparation bin for premixing CaO-Mg-based composite desulfurizer, a double-screw metering conveyor and an ultrasonic spray gun, and further comprises a bottom blowing inert gas device and a mechanical stirring device.

[0011] Preferably, the multi-parameter sensing module comprises: an insertion type thermocouple for temperature measurement, a laser-induced spectrometer for on-line detection of sulfur content, a three-dimensional scanning device for acquiring the particle size and bulk density of the scrap steel, and a ladle positioning radar.

[0012] Preferably, the intelligent collaborative control module comprises: A sulfur content prediction submodule is configured to calculate the desulfurizer adding amount based on the initial sulfur of the molten iron, the target sulfur, the effective desulfurization rate of the desulfurizer and the collaborative correction coefficient; and A scrap steel desulfurization collaboration submodule is configured to reduce the adding speed of the scrap steel and increase the injection intensity when it is detected that the temperature of the molten iron is lower than a preset threshold.

[0013] Preferably, the environmental protection recycling assembly further comprises a smoke dust collecting cover, a bag-type dust collector and a dust regenerating device for compressing the desulfurization dust into sulfur-containing pellets for reuse.

[0014] A molten iron tank cooperative treatment method integrating scrap steel addition and off-furnace desulfurization, comprising: S1, starting a multi-parameter sensing module to obtain initial sulfur content of molten iron, initial temperature of molten iron, scrap steel particle size, scrap steel bulk density and tank position information; S2, calculating target scrap steel addition amount, scrap steel addition rhythm, desulfurizer amount and injection parameters based on a cooperative control strategy; S3, adding preheated scrap steel into the molten iron tank in batches according to the calculation results; S4, after the first batch of scrap steel is added, starting desulfurizer injection and alternately adding scrap steel; S5, maintaining a target temperature window and monitoring sulfur content in real time during the treatment process, and stopping injection when the target sulfur content is met, and stopping feeding when the cumulative addition of scrap steel meets the standard; S6, after the end, carrying out smoke dust collection and regeneration for reuse.

[0015] Preferably, in S3, the addition amount of each batch is 1 / 5 to 1 / 4 of the total addition amount, the batch interval is 30 to 60 seconds, and the temperature of the molten iron is controlled at 1300 to 1400 DEG C during the treatment process, and the injection is stopped when the sulfur content detected online is not higher than the target sulfur content.

[0016] Preferably, in S4, the injection process uses a supersonic injection gun and is injected at 30 to 45 DEG C relative to the tank wall, and the injection gun is lifted and reset by 50 to 100 mm every 3 to 5 minutes of injection; when it is detected that the sulfur content of the scrap steel is higher than a threshold value, the amount of desulfurizer is automatically increased and the stirring time is extended.

[0017] Compared with the prior art, the beneficial effects of the present application are: The present application realizes the cooperative control of scrap steel addition and off-furnace desulfurization in the same molten iron tank, forms an alternating operation mode of addition and injection, effectively avoids the secondary transfer and heat loss caused by traditional separate processes, controls the temperature drop of the molten iron within 30 DEG C, reduces the comprehensive energy consumption per ton of iron by 8% to 12%, and significantly improves the thermal energy utilization efficiency.

[0018] The intelligent cooperative control module of the present application integrates a dynamic cooperative algorithm, can receive multi-parameter signals such as molten iron temperature, sulfur content and scrap steel characteristics in real time, automatically adjusts the scrap steel addition rate and injection intensity based on sulfur content prediction and scrap steel-desulfurization cooperative logic, realizes accurate control of the amount of desulfurizer, ensures that the sulfur content meets the standard stably and shortens the treatment cycle.

[0019] The application can compensate the temperature drop in the desulfurization process and improve the mixing uniformity by setting a hierarchical scrap steel processing module, which divides the scrap steel into three levels according to particle size and differentiates the preheating in the gradient preheating bin, so as to improve the heat recycling rate and melting efficiency of the scrap steel, and the scrap steel ratio can be increased by more than 25%.

[0020] The multi-parameter sensing module of the application integrates a laser-induced spectrometer, an insertion thermocouple, a three-dimensional scanning device and a molten iron tank positioning radar, can collect temperature, sulfur content, particle size, bulk density and tank position data in real time, provide accurate feedback for the control algorithm, and realize whole-process visual monitoring and automatic correction.

[0021] The application can recycle and suppress the dust generated in the desulfurization process into sulfur-containing pellets for recycling by setting an environmental protection recycling assembly including a dust collecting hood, a bag-type dust collector and a dust regeneration device, the dust recycling rate reaches more than 90%, secondary pollution is reduced and resource recycling is realized, and energy saving and environmental protection benefits are taken into account. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The figure is a schematic diagram of the system module in the preferred embodiment of the application; Figure 2 The figure is a schematic diagram of the method flow in the preferred embodiment of the application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application, and all other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments in the application belong to the protection scope of the application.

[0024] As shown in Figure 1 and Figure 2 : First preferred embodiment: The embodiment provides a molten iron tank cooperative treatment system integrating scrap steel addition and off-furnace desulfurization, which comprises an intelligent cooperative control module, a hierarchical scrap steel processing module, a precise desulfurization device, a multi-parameter sensing module and an environmental protection recycling assembly.

[0025] The intelligent cooperative control module takes an industrial PLC as the core, integrates a dynamic cooperative algorithm module, is used for receiving real-time signals of the multi-parameter sensing module and outputting control instructions to the hierarchical scrap steel processing module and the precise desulfurization device, so that the scrap steel addition and the desulfurization injection can be alternately performed in the same molten iron tank according to the cooperative strategy.

[0026] The intelligent collaborative control module further comprises a display screen and an alarm device, which are used to display the temperature of molten iron, sulfur content, scrap steel addition amount, desulfurizer injection rate and system running state in real time, and send an alarm prompt when the parameters are out of limits. The display screen can provide a man-machine interactive interface for setting the target sulfur content, temperature threshold and other control parameters, realizing the combination of manual intervention and automatic control.

[0027] The intelligent collaborative control module performs real-time calculation and linkage control according to the parameters such as the temperature of molten iron, sulfur content and sulfur content brought by scrap steel, so as to solve the problems of high energy consumption, large temperature drop and low efficiency caused by the traditional separation process, stabilize the sulfur content of molten iron below 0.015%, increase the scrap steel ratio to more than 25%, and reduce the comprehensive energy consumption per ton of iron by 8%-12%.

[0028] The hierarchical scrap steel processing module comprises a scrap steel screening assembly, a gradient preheating bin and a self-adaptive conveying mechanism.

[0029] The scrap steel screening assembly divides the scrap steel into three levels of coarse material (100-300 mm), medium material (50-100 mm) and fine material (less than 50 mm) according to particle size.

[0030] The gradient preheating bin sets three heating intervals of 300℃, 500℃ and 700℃ corresponding to the three levels of scrap steel respectively, for realizing differential preheating of different particle size scrap steel and compensating for possible temperature drop in the desulfurization process.

[0031] The self-adaptive conveying mechanism realizes quantitative conveying of scrap steel of different particle sizes by using a magnetic control belt, the surface of the magnetic control belt is provided with electromagnetic adsorption units to adjust the adsorption force, a weight online detector is arranged at the end of the belt to realize closed-loop control of the addition amount, so as to provide controllable means of particle size, temperature and feeding rhythm for collaborative control.

[0032] The precise desulfurization device comprises a metering conveying mechanism and a injection device, the metering conveying mechanism is used to convey the desulfurizer to the injection device at a set rate, and the injection device is used to send the desulfurizer into the molten iron and mix it with the molten iron. Preferably, the precise desulfurization device further comprises a preparation bin for premixing CaO-Mg-based composite desulfurizer, the metering conveying mechanism is a double-screw metering conveyor, the injection device is a supersonic injection gun, and further comprises a bottom blowing inert gas device and a mechanical stirring device to form a composite stirring mode of gas stirring and mechanical stirring, improve the desulfurization efficiency and the uniformity of the temperature of molten iron. The CaO-Mg-based composite desulfurizer can be premixed in the desulfurizer preparation bin, wherein the mass percentage of CaO is 60%-70% and the mass percentage of Mg is 20%-30%.

[0033] The multi-parameter sensing module is used for online acquisition of molten iron temperature, sulfur content, scrap steel particle size and bulk density, and molten iron ladle position information. The multi-parameter sensing module includes a plug-in thermocouple, a laser-induced spectrometer, a three-dimensional scanning device, and a molten iron ladle positioning radar, etc. The detection period of the laser-induced spectrometer is about 5 seconds, and the detection accuracy is about ±0.001%; the three-dimensional scanning device provides particle size and bulk density data; and the molten iron ladle positioning radar is used to ensure the centering accuracy of the charging and injection positions, thereby providing reliable detection data for the coordinated control.

[0034] The environmental protection recycling assembly includes a desulfurization flue dust collection cover, a bag-type dust collector, and a dust regeneration device, which are used for capturing and purifying dust-containing gas generated in the desulfurization process, and pressing the recycled desulfurization dust into sulfur-containing pellets for reuse. Under typical working conditions, the collection cover has a capture efficiency of more than 95%, the bag-type dust collector has a dust removal efficiency of 99.9%, and the outlet dust concentration is not higher than 10 mg / m 3 . The recycled dust is pressed into sulfur-containing pellets with a diameter of about 50-80 mm for reuse, and the recycling rate can be more than 90%.

[0035] The working principle of the system is as follows: The intelligent coordinated control module synchronously schedules and closed-loop controls the scrap steel addition and desulfurization injection through a dynamic coordination algorithm. The dynamic coordination algorithm includes sulfur content prediction logic and scrap steel desulfurization coordination logic. The sulfur content prediction logic is used to calculate the theoretical addition amount of desulfurizing agent and the injection intensity.

[0036] After the system is started, the control module calculates the theoretical addition amount of desulfurizing agent according to the initial sulfur content of molten iron, the target sulfur content, the effective desulfurization rate of desulfurizing agent, and the coordination correction coefficient K, and the calculation formula is as follows:

[0037] In the formula, mdesulfurizing agent is the required desulfurizing agent mass, S0 is the initial sulfur content of molten iron, S t is the target sulfur content, miron is the mass of molten iron, η is the effective desulfurization rate of desulfurizing agent, K is the coordination correction coefficient, and k is an empirical constant.

[0038] The calculation result is used to control the rotation speed of the double-screw metering conveyor and the injection rate of the supersonic injection gun. The coordination correction coefficient K is updated in real time according to the sulfur content of the scrap steel and the change of the molten iron temperature, and when it is detected that the sulfur content of the scrap steel is too high or the temperature drop is large, the system automatically increases the K value to compensate for the insufficient consumption of desulfurizing agent.

[0039] The scrap steel desulfurization coordination logic is used to realize time alternation and parameter coordination of two types of operations. The system takes the real-time temperature of molten iron and the threshold temperature as the judgment condition. When the temperature is higher than the threshold, the control module allows to continue adding scrap steel and maintains the blowing intensity within the set range. When the temperature is lower than the threshold, the module automatically reduces the scrap steel addition rate and synchronously increases the blowing intensity or prolongs the stirring time to maintain the molten iron temperature and desulfurization efficiency. The algorithm reads the temperature and sulfur content signals of the multi-parameter sensing module at a fixed sampling period and performs a round of judgment and correction: when the sulfur content decreases at a rate lower than the preset threshold, the desulfurizer flow is automatically increased, and when the temperature decreases at a rate that is too large, the scrap steel addition is suspended. The control module records the particle size distribution, feeding time, blowing pressure and gas flow of each batch of scrap steel for subsequent statistics and optimization.

[0040] The output of the dynamic coordination algorithm includes three types of control quantities: scrap steel addition rate, desulfurizer blowing rate and bottom blowing inert gas flow. The three types maintain a proportional constraint relationship during operation to achieve the synchronous balance of desulfurization reaction rate and temperature drop. The control system corrects according to the deviation of the target sulfur content and the real-time detection value, increases the blowing rate and bottom blowing gas flow when the deviation is large, gradually reduces the blowing intensity when the deviation is small, and automatically stops blowing when the sulfur content is detected to be not higher than the target value.

[0041] The system records the initial and final temperature, sulfur content, scrap steel addition amount and desulfurizer consumption during operation, and updates the value range of the coordination correction coefficient K accordingly to make the subsequent tank control more stable. During the tapping process, the molten iron is injected into the molten iron tank at high speed, and the impact energy and flow shear force generated by the molten iron jointly form a high-strength turbulent field in the tank. The forced stirring effect of this turbulent field can greatly increase the contact area between molten iron and desulfurizer and strengthen the mass transfer process, while accelerating the heat transfer and melting dynamics process on the surface of scrap steel, ultimately improving the desulfurization reaction rate and scrap steel melting utilization efficiency from both reaction kinetics and heat transfer kinetics. In industrial application verification, the above system is operated according to the coordination strategy, the single-tank processing period can be controlled to about 40-60 minutes, which is shorter than the traditional separation process of 80-100 minutes, the molten iron temperature drop is controlled within 30°C, the final sulfur content reaches or is better than 0.015%, and the scrap steel ratio and dust resource utilization rate are improved.

[0042] Second preferred embodiment: The embodiment provides a molten iron tank coordination processing method integrating scrap steel addition and off-site desulfurization, which is suitable for the coordination processing system described in the first preferred embodiment, and realizes the comprehensive optimization of molten iron temperature, sulfur content and desulfurization efficiency by dynamically coordinating the processes of scrap steel addition and off-site desulfurization.

[0043] S1: Start the multi-parameter sensing module to obtain the initial sulfur content of molten iron, the initial temperature of molten iron, the particle size of scrap steel, the bulk density of scrap steel and the tank position information. The multi-parameter sensing module includes a plug-in thermocouple, a laser-induced spectrometer, a three-dimensional scanning device and a molten iron tank positioning radar. The laser-induced spectrometer detects the sulfur content of molten iron in real time, the plug-in thermocouple outputs a temperature signal, the three-dimensional scanning device provides scrap steel particle size and bulk density data, and the molten iron tank positioning radar is used to feed back the tank position information. These signals are input into the intelligent collaborative control module to provide a real-time data basis for subsequent calculations.

[0044] S2: Based on the collaborative control strategy, the target scrap steel addition amount, the scrap steel addition rhythm, the desulfurizer dosage and the injection parameters are calculated. The intelligent collaborative control module calculates the theoretical dosage of the desulfurizer according to the initial sulfur content S0 of the molten iron, the target sulfur content S t , the effective desulfurization rate η of the desulfurizer and the collaborative correction coefficient K. The calculation formula is as follows:

[0045] In the formula, mdesulfurizer is the required desulfurizer mass, S0 is the initial sulfur content of the molten iron, S t is the target sulfur content, miron is the mass of the molten iron, η is the effective desulfurization rate of the desulfurizer, K is the collaborative correction coefficient, and k is an empirical constant. According to the calculation results, the system sets the rotational speed of the metering conveying mechanism, the injection rate of the supersonic lance and the flow rate of the bottom-blown inert gas and other control quantities.

[0046] S3: According to the calculation results, preheated scrap steel is added to the molten iron tank in batches. The preheated scrap steel is quantitatively added by the self-adaptive conveying mechanism, and the batch addition amount is preferably 1 / 5-1 / 4 of the total addition amount, and the batch interval is 30-60 s. The weight online detector is used to monitor the feeding quality in real time to ensure that the cumulative addition amount is consistent with the set value. The batch addition method can reduce the instantaneous temperature drop and maintain the stability of the desulfurization reaction.

[0047] S4: After the first batch of scrap steel is added, the desulfurizer injection is started and alternated with the scrap steel addition. The desulfurizer is conveyed to the supersonic lance by the double-screw metering conveyor, and is injected into the molten iron and mixed with the molten iron. During the injection process, the lance is injected at an angle of 30°-45° relative to the tank wall, and the lance is lifted and reset by 50-100 mm every 3-5 min of injection. The system automatically judges the temperature and sulfur content changes according to the real-time detection signals: when the temperature of the molten iron is higher than the threshold value, the scrap steel is continuously added; when the temperature is lower than the threshold value, the scrap steel addition is suspended and the injection intensity is increased or the stirring time is prolonged. When it is detected that the sulfur content of the scrap steel itself is higher than the preset threshold value, the system automatically increases the desulfurizer dosage and prolongs the stirring time.

[0048] S5: Maintain the target temperature window and monitor the sulfur content in real time during the process. When the temperature of the molten iron is in the range of 1300-1400℃, the system dynamically corrects according to the feedback of the laser-induced spectrometer and the thermocouple detected temperature change rate. When the sulfur content decreases below the preset threshold, the desulfurizer flow is automatically increased, and when the temperature drop rate exceeds the set limit, the scrap steel addition rate is reduced or the feeding is suspended. When the online detected sulfur content is not higher than the target sulfur content, the spraying operation is automatically stopped; when the cumulative scrap steel addition reaches the target value, the feeding is automatically stopped.

[0049] S6: After the end, collect and regenerate the smoke dust. The smoke dust generated during the desulfurization process is captured by the desulfurization smoke dust collection cover, and after purification by the bag filter, it is sent to the dust regeneration device to press into sulfur-containing pellets for reuse. Under typical working conditions, the collection cover capture efficiency can reach more than 95%, the bag filter efficiency can reach 99.9%, and the dust regeneration recycling rate is about 90%.

[0050] During the entire process, the system records the operating data of molten iron temperature, sulfur content, scrap steel addition, desulfurizer injection amount and gas flow in real time, and updates the value range of the cooperative correction coefficient K according to the statistical results after the process is completed, so that the subsequent tank operation is more stable. Using this method, the single tank processing period can be controlled within 40-60 minutes, the molten iron temperature drop is controlled within 30℃, and the final sulfur content reaches or is better than 0.015%, which can realize energy consumption reduction of 8%-12% and processing efficiency improvement of more than 30% compared with the traditional separation process.

[0051] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When all or part of the embodiments are implemented in the form of a computer program product, the computer program product includes one or more computer instructions. When the computer program instructions are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through a wired (such as coaxial cable, optical fiber, digital subscriber line (DSL) or wireless (such as infrared, wireless, microwave, etc.)) way. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium such as a solid state disk (SSD) and the like.

[0052] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A ladle co-processing system integrating scrap addition and off-gas desulphurization, characterized in that, Intelligent collaborative control module, for receiving temperature, sulfur content and scrap steel characteristic data of multi-parameter perception module, synchronously determining scrap steel adding rhythm and desulfurizer injection parameters based on collaborative control strategy, and making scrap steel adding and desulfurization injection in an alternating manner; Graded scrap steel processing module, including a screening assembly for grading scrap steel according to particle size, a gradient preheating bin for preheating different particle size scrap steel, and a self-adaptive conveying mechanism for quantitatively adding preheated scrap steel into the ladle; Precise desulfurization device, including metering conveying mechanism and injection device, the injection device is used for sending desulfurizer into molten iron and stirring and mixing with molten iron; Multi-parameter perception module, for obtaining molten iron temperature and sulfur content and obtaining scrap steel particle size / bulk density and ladle position information; Wherein, the intelligent collaborative control module is configured to: calculate the desulfurizer dosage and injection intensity according to the sulfur carrying amount of scrap steel and the temperature state of molten iron, coordinate the alternating action of the self-adaptive conveying mechanism and the injection device, and terminate the corresponding operation when the target sulfur content or the cumulative addition of scrap steel is met. The gradient preheating bin includes multiple independent temperature control preheating zones corresponding to coarse material, medium material and fine material respectively, and the target temperature interval of each independent temperature control preheating zone is different.

2. The integrated hot metal ladle co-processing system of scrap charging and offgas desulphurization as claimed in claim 1 wherein, The self-adaptive conveying mechanism is a magnetic control belt, and the surface of the magnetic control belt is provided with an electromagnetic adsorption unit for adjusting the adsorption force of different particle size scrap steel, and a weight online detector is arranged at the end of the belt for closed-loop control of the adding amount.

3. The integrated hot metal ladle co-processing system of scrap charging and offgas desulphurization as claimed in claim 1 wherein, The precise desulfurization device includes a preparation bin for premixing CaO-Mg-based composite desulfurizer, a double-screw metering conveyor and an ultrasonic speed injection gun, and further includes a bottom blowing inert gas device and a mechanical stirring device.

4. The integrated hot metal ladle co-processing system of scrap charging and offgas desulphurization as claimed in claim 1 wherein, The multi-parameter perception module includes an insertion type thermocouple for temperature measurement, a laser-induced optical spectrometer for online detection of sulfur content, a three-dimensional scanning device for obtaining scrap steel particle size and bulk density, and a ladle positioning radar.

5. The integrated hot metal ladle co-processing system of scrap charging and offgas desulphurization as claimed in claim 1 wherein, The intelligent collaborative control module includes:

6. The integrated hot metal ladle co-processing system of scrap charging and offgas desulphurization as claimed in claim 1 wherein, A sulfur content prediction submodule for calculating the desulfurizer dosage based on the initial sulfur of molten iron, the target sulfur, the effective desulfurization rate of desulfurizer and the collaborative correction coefficient; and A scrap steel desulfurization collaboration submodule for reducing the scrap steel adding speed and increasing the injection intensity when detecting that the temperature of molten iron is lower than a preset threshold.

7. The integrated scrap steel adding and off-gas desulfurization ladle collaborative processing system according to claim 1, further comprising an environmental protection recycling assembly, the environmental protection recycling assembly including a smoke dust collection cover, a bag-type dust collector and a dust regenerating device for pressing the desulfurization dust into sulfur-containing pellets for recycling. Including:

8. A method of integrated treatment of a ladle with scrap addition and off-gas desulphurization, characterized in that, S1, starting the multi-parameter perception module to obtain the initial sulfur content of molten iron, the initial temperature of molten iron, the particle size of scrap steel, the bulk density of scrap steel and the ladle position information; S2, calculating the target scrap steel adding amount, scrap steel adding rhythm, desulfurizer dosage and injection parameters based on the collaborative control strategy; S3, adding preheated scrap steel into the ladle in batches according to the calculation results; S4, after the first batch of scrap steel is added, starting the desulfurizer injection and alternating with the scrap steel adding; S5, maintaining the target temperature window and monitoring the sulfur content in real time during the processing, and stopping the injection when the target sulfur content is met, and stopping the adding when the cumulative addition of scrap steel is met; ​ S6, after the end of the collection and regeneration of smoke.

9. The integrated scrap charging and ladle co -processing with off gas desulphurization process as claimed in claim 8 wherein, In S3, the amount of each batch is 1 / 5-1 / 4 of the total amount, the interval between batches is 30-60 s, and the temperature of the molten iron is controlled at 1300-1400℃ during the treatment process. When the sulfur content detected on-line is not higher than the target sulfur content, the injection is stopped.

10. The integrated scrap charging and ladle co - processing method with off gas desulphurization according to claim 8 or 9, characterized in that, In S4, the injection process uses a supersonic lance and is injected at 30-45° relative to the tank wall. The lance is lifted and reset by 50-100 mm every 3-5 min of injection. When the detected scrap steel sulfur content is higher than the threshold value, the amount of desulfurizer is automatically increased and the stirring time is extended.

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