Centralized control system for steel slag sorting production line

Abstract

The invention belongs to the technical field of steel slag sorting treatment, and particularly relates to a centralized control system for a steel slag sorting production line, materials are fed to a bar screen through a forklift for primary sorting, two materials larger than 10 mm and smaller than 10 mm are sorted out, the materials larger than 10 mm are conveyed to a finished product warehouse through a 7 # sealing-tape machine, mixed slag powder selected by a de-ironing separator is conveyed to a finished product warehouse through a 9 # sealing-tape machine, and the finished product warehouse is conveyed to a finished product warehouse. Remaining materials enter a cone crusher to be crushed and then are conveyed to a third sealing-tape machine through an eighth sealing-tape machine and conveyed to a second vibrating screen through a sixth sealing-tape machine, and closed-loop crushing is formed; the materials smaller than 10 mm pass through a 10 # sealing-tape machine, tailings are separated out through a primary magnetic separation roller and conveyed to a finished product warehouse, the remaining materials pass through a 11 # sealing-tape machine, slag steel powder is separated out through a secondary magnetic separation roller, and the remaining materials of the slag steel powder are conveyed to the finished product warehouse.

Description

Technical Field

[0001] The invention relates to a control system, in particular to a centralized control system for a steel slag sorting production line, and belongs to the technical field of steel slag sorting and processing. Background Art

[0002] Steel slag is waste slag produced in the metallurgical industry, and its production rate is 8% to 15% of crude steel output. The comprehensive utilization of steel slag resources has a high value. At present, the layout of different steel slag raw material sorting production lines is scattered, the investment cost is high, the process layout is unreasonable, the land occupation is large, the transportation efficiency is low, the equipment automation level is low, the iron element recovery is insufficient, the labor cost and risk factors are increased, and the production efficiency is reduced. Therefore, it is very necessary to design a centralized control system for steel slag sorting production lines. Summary of the invention

[0003] The present invention is aimed at the technical problems existing in the prior art and provides a centralized control system for a steel slag sorting production line. The centralized control system can effectively improve the production efficiency of steel slag sorting, increase the iron recovery rate, optimize personnel allocation, reduce personnel labor intensity, and improve the economy and safety of production line operation.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a centralized control system for a steel slag sorting production line, the control system includes a feeding system, a conveying system, a screening system, a crushing system and a magnetic separation system. The materials are loaded to the bar screen by a forklift for primary sorting, and the particles with a particle size greater than 100 mm enter the drop hammer workshop. After the drop hammer slag is beaten, the large pieces of steel slag are selected, and the remaining materials are crushed by a jaw crusher and then merged into the 2# belt conveyor through the 1# belt conveyor, and are transported to the 1# vibrating screen together with the materials less than 100 mm under the bar screen for screening, and two types of materials greater than 30 mm and less than 30 mm are selected. The materials greater than 30 mm pass through the 4# and 5# belt conveyors and the iron remover, and the slag steel particles selected are passed through the 12# belt conveyor. The remaining materials are transported to the finished product warehouse through a belt conveyor, and the remaining materials are transported to the 7# belt conveyor via a 5# belt conveyor; the materials smaller than 30mm are transported to the 2# vibrating screen via 3# and 6# belt conveyors, and two types of materials larger than 10mm and smaller than 10mm are selected. The materials larger than 10mm are transported to the finished product warehouse through the 7# belt conveyor and the mixed slag powder selected by the iron remover via the 9# belt conveyor, and the remaining materials enter the cone crusher for crushing and are transported to the 3# belt conveyor via the 8# belt conveyor and then to the 2# vibrating screen via the 6# belt conveyor to form a closed-circuit crushing; the materials smaller than 10mm are transported to the finished product warehouse through the 10# belt conveyor and the first magnetic separation drum to select the tailings, and the remaining materials are transported to the finished product warehouse through the 11# belt conveyor and the second magnetic separation drum to select the slag steel powder and the remaining slag steel powder.

[0005] Among them, the feeding system includes 2 sets of feeding bar screens, one for use and one for standby. The grading particle size of the bar screen is 100mm. The forklift loads the materials onto the bar screen for primary sorting. The materials smaller than 100mm fall into the 2# belt; the slag blocks larger than 100mm enter the drop hammer room for slag beating, and the large pieces of steel slag are selected. The remaining materials are crushed by the jaw crusher and then merged into the 2# belt through the 1# belt.

[0006] The conveying system includes 1#-12# belt conveyors. 1# and 2# belt conveyors are used to convey materials below 100mm, 3# and 6# belt conveyors are used to convey materials below 30mm, 4# and 5# belt conveyors are used to convey materials between 30-100mm, 7# and 9# belt conveyors are used to convey materials between 10-30mm, 8# belt conveyor is used to convey materials crushed by cone crusher, 10# and 11# belt conveyors are used to convey materials below 10mm, and 12# belt conveyor conveys materials removed by the iron remover of 5# belt conveyor. The 12 belt conveyors not only ensure the continuity of material sorting and circulation, but also make the production line layout more compact and reasonable, reducing on-site barge transportation. The crushing system includes 1 jaw crusher and 1 inertial cone crusher. The jaw crusher has a large crushing ratio and a large adjustment range, which is suitable for crushing slag blocks after drop hammer slagging, so as to facilitate belt conveyor transportation and subsequent screening. Compared with other crushers, the GYP1200 inertial cone crusher used in the production line has the advantage of being able to crush materials to a particle size of less than 10mm, with the aim of recovering as much iron as possible from the tailings.

[0007] The screening system includes 1# vibrating screen and 2# vibrating screen. 1# vibrating screen is an environmentally friendly high-elastic screen with 3 sets of vibrating units. The screen plate is made of high-elastic polyurethane with a long service life. The screen body is fully sealed and equipped with a dust cover. The grading particle size is 30mm. Large-size slag steel particles can be directly returned to the steel plant, while ensuring that the particle size of the material entering the cone crusher is less than 30mm; 2# vibrating screen is an environmentally friendly multi-frequency screen with 2 sets of vibrating units with a long service life. The screen body is fully sealed and equipped with a dust cover. The grading particle size is 10mm. 10-30mm materials are screened and enter the cone crusher. Materials below 10mm are passed through a 10# belt conveyor and a magnetic separation to obtain tailings. The vibration frequency of the two sets of vibrating screens is adjustable and can be adjusted according to the production line output and material characteristics, which can not only ensure smooth material discharge but also reduce the energy consumption of the production line.

[0008] The magnetic separation system includes two iron removers and two magnetic rollers. The RCDK-8T electromagnetic armored iron remover used in the production line adopts a fully enclosed magnetic system structure. The unique internal and external double coil structure prevents the coil from direct contact with the outside world. The internal and external coil structure increases the heat dissipation area, and the overall temperature rise is low, so that the iron remover can adapt to harsh working environments and ensure the stability of magnetic field performance. At the same time, a multi-scraper armored unloading belt is used, and a wear-resistant protective plate with a shielding effect is added to the mother belt, which effectively reduces the impact wear of steel slag on the mother belt, avoids damage to the mother belt, and extends the service life of the belt. The two magnetic separation drums are CTDG0608 type, one for primary magnetic separation (roughing) and the other for secondary magnetic separation (fine separation). The roughing requires that the iron content of the tailings is controlled within 3%, and the fine separation requires that the iron grade of the finished product is above 50%. The equipment of the present invention is controlled and operated by a programmable controller, and the production line is controlled by Siemens' S7-1500 series PLC. The CPU selects 1516-3PN / DP, and the communication module selects CP1542-1 and CP1543-1. The PLC is a distributed peripheral Ethernet connection, and communication with external devices is achieved through the PROFINET IO system.

[0009] The automatic startup process of the control system of the present invention is as follows:

[0010] Press the start process button on the operation screen:

[0011] (1) The system automatically determines whether the start-up conditions are met: 2# belt conveyor, 3# belt conveyor, 4# belt conveyor, 5# belt conveyor, 6# belt conveyor, 7# belt conveyor, 9# belt conveyor, 10# belt conveyor, 11# belt conveyor, 12# belt conveyor, 1# iron remover, 2#

[0012] The iron remover, primary magnetic separation drum and secondary magnetic separation drum all meet the requirements of centralized control, automatic control and fault-free alarm status.

[0013] (2) Loading selection: The loading bar screen needs to be manually selected on the operation screen. If the 1# loading bar screen is selected, the 1# vibrating feeder on-site control box needs to be in remote state, and there is no fault alarm. At the same time, the 1# loading bar screen is ready and there is no fault alarm. Similarly, if the 2# loading bar screen is selected, the 2# vibrating feeder on-site control box needs to be in remote state, and there is no fault alarm. At the same time, the 2# loading bar screen is ready and there is no fault alarm.

[0014] (3) Automatic operation after material selection: Automatic operation starts from the end equipment of the slag sorting process. 100ms after the automatic operation starts, the 11# belt and the 9# belt start running, 10s after the 11# belt running signal is fed back, the 10# belt starts running, 10s after the 9# belt running signal is fed back, the 2# iron remover starts running, and 10s after the 2# iron remover excitation operation and belt running feedback signals are received, the 7# belt is started, 10s after the 10# belt and 7# belt running signal feedback is confirmed, the 2# vibrating screen is started, and 10s after the 2# vibrating screen running signal feedback is confirmed, the 12# belt and the 6# belt are started.

[0015] 1) 10 seconds after the 6# belt is started, start the 3# belt. 10 seconds after the 3# and 4# belts are confirmed to have running signals, start the 1# vibrating screen. 10 seconds after the 1# vibrating screen has been confirmed to have running signals, start the 2# belt. 10 seconds after the 2# belt is running, start the vibrating feeder.

[0016] 2) Start the 1# iron remover 10 seconds after the 12# belt starts. Wait for the 1# iron remover excitation operation and belt operation feedback signals to be received, and then start the 5# belt 10 seconds after the 5# belt operation signal is confirmed, and then start the 4# belt 10 seconds after the 5# belt operation signal is confirmed.

[0017] The beneficial effects of the present invention are as follows: a centralized control system for a steel slag sorting production line is provided, which connects the breakpoints of processing different steel slag raw materials, makes the process layout more compact and reasonable, and reduces the investment cost. The belt conveyor is used to shorten the transportation distance, achieve the purpose of material transportation, sorting and closed-loop crushing, and save 2 / 3 of the floor space. Through the selection of equipment and the improvement of the automation level, the centralized control of the operation room and one-button start and stop are realized, the 3D positions on site are reduced, the labor quota is reduced by 1 / 4, and the safety and environmental protection risks of the production line operation are also reduced. After the production line of Baowu Environmental Science Nanjing Resource Utilization Co., Ltd. was put into operation, the discharge particle size was stable, the tailings particle size was ≤10mm, the tailings MFe grade was <3%, and the slag steel powder TFe grade was ≥53%, achieving the full return of metal materials and effective guarantee of iron recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a process flow chart of the steel slag separation production line of the present invention;

[0019] Figure 2 This is a flow chart for starting the control system of the present invention. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present embodiment is described in detail below with reference to the accompanying drawings.

[0021] Example 1: See Figure 1, a centralized control system for slag sorting production line. Materials are loaded to the bar screen by a forklift for primary sorting. Materials with a particle size greater than 100mm enter the drop hammer workshop. After the drop hammer slag is removed, large pieces of slag are selected. The remaining materials are crushed by a jaw crusher and then merged into the 2# belt conveyor through the 1# belt conveyor. Together with the materials less than 100mm under the bar screen, they are transported to the 1# vibrating screen for screening, and two types of materials greater than 30mm and less than 30mm are selected. The materials greater than 30mm pass through the 4# and 5# belt conveyors and the iron remover, and the slag steel particles selected are transported to the finished product warehouse through the 12# belt conveyor. The remaining materials are transported to the 7# belt conveyor through the 5# belt conveyor; the materials less than 30mm are transported to the 2# vibrating screen through the 3# and 6# belt conveyors, and two types of materials greater than 10mm and less than 10mm are selected. The materials larger than 10mm are transported to the finished product warehouse through the 7# belt conveyor and the mixed slag powder selected by the iron remover via the 9# belt conveyor. The remaining materials enter the cone crusher for crushing and are transported to the 3# belt conveyor via the 8# belt conveyor and then to the 2# vibrating screen via the 6# belt conveyor to form a closed-circuit crushing. The materials smaller than 10mm are transported to the finished product warehouse through the 10# belt conveyor and the first magnetic separation drum to select the tailings. The remaining materials are transported to the finished product warehouse through the 11# belt conveyor and the second magnetic separation drum to select the slag steel powder and the remaining slag steel powder.

[0022] Process control: Automated startup process see Figure 2 :

[0023] Press the start process button on the operation screen:

[0024] (1) The system automatically determines whether the startup conditions are met: 2# belt conveyor, 3# belt conveyor, 4# belt conveyor, 5# belt conveyor, 6# belt conveyor, 7# belt conveyor, 9# belt conveyor, 10# belt conveyor, 11# belt conveyor, 12# belt conveyor, 1# iron remover, 2# iron remover, primary magnetic separation drum, and secondary magnetic separation drum all meet the centralized control, automatic control and no fault alarm status.

[0025] (2) Loading selection: The loading bar screen needs to be manually selected on the operation screen. If the 1# loading bar screen is selected, the 1# vibrating feeder on-site control box needs to be in remote state, and there is no fault alarm. At the same time, the 1# loading bar screen is ready and there is no fault alarm. Similarly, if the 2# loading bar screen is selected, the 2# vibrating feeder on-site control box needs to be in remote state, and there is no fault alarm. At the same time, the 2# loading bar screen is ready and there is no fault alarm.

[0026] (3) Automatic operation after material selection: Automatic operation starts from the end equipment of the slag sorting process. 100ms after the automatic operation starts, the 11# belt and the 9# belt start running, 10s after the 11# belt running signal is fed back, the 10# belt starts running, 10s after the 9# belt running signal is fed back, the 2# iron remover starts running, and 10s after the 2# iron remover excitation operation and belt running feedback signals are received, the 7# belt is started, 10s after the 10# belt and 7# belt running signal feedback is confirmed, the 2# vibrating screen is started, and 10s after the 2# vibrating screen running signal feedback is confirmed, the 12# belt and the 6# belt are started.

[0027] 1) 10 seconds after the 6# belt is started, start the 3# belt. 10 seconds after the 3# and 4# belts are confirmed to have running signals, start the 1# vibrating screen. 10 seconds after the 1# vibrating screen has been confirmed to have running signals, start the 2# belt. 10 seconds after the 2# belt is running, start the vibrating feeder.

[0028] 2) Start the 1# iron remover 10 seconds after the 12# belt starts. Wait for the 1# iron remover excitation operation and belt operation feedback signals to be received, and then start the 5# belt 10 seconds after the 5# belt operation signal is confirmed, and then start the 4# belt 10 seconds after the 5# belt operation signal is confirmed.

[0029] It should be noted that the above embodiments are not intended to limit the protection scope of the present invention, and equivalent changes or substitutions made on the basis of the above technical solutions all fall within the protection scope of the claims of the present invention.

Claims

1. A centralized control system for a steel slag sorting production line, characterized in that: The control system includes a feeding system, a conveying system, a screening system, a crushing system and a magnetic separation system. The materials are loaded by a forklift to the bar screen for primary sorting. The materials with a particle size greater than 100 mm enter the drop hammer workshop. After the drop hammer slag is removed, the large pieces of steel slag are selected. The remaining materials are crushed by a jaw crusher and then merged into the 2# belt conveyor through the 1# belt conveyor. Together with the materials less than 100 mm under the bar screen, they are transported to the 1# vibrating screen for screening, and two types of materials greater than 30 mm and less than 30 mm are selected. The materials greater than 30 mm pass through the 4# and 5# belt conveyors and the iron remover, and the slag steel particles selected are transported to the finished product warehouse through the 12# belt conveyor. The remaining materials are transported to the 5# belt conveyor. The material with a size smaller than 30 mm is conveyed to the 2# vibrating screen via the 3# and 6# belt conveyors, and two types of materials with a size larger than 10 mm and smaller than 10 mm are selected. The material with a size larger than 10 mm is conveyed to the finished product warehouse via the 9# belt conveyor after the mixed slag powder selected by the 7# belt conveyor and the iron remover is conveyed to the finished product warehouse via the 9# belt conveyor. The remaining material enters the cone crusher for crushing and is conveyed to the 3# belt conveyor via the 8# belt conveyor and then to the 2# vibrating screen via the 6# belt conveyor, forming a closed-circuit crushing. The material with a size smaller than 10 mm is conveyed to the finished product warehouse via the 10# belt conveyor and the first magnetic separation drum to select the tailings, which is then conveyed to the finished product warehouse. The remaining material is conveyed to the 11# belt conveyor and the second magnetic separation drum to select the slag steel powder and the remaining slag steel powder and conveyed to the finished product warehouse.

2. The centralized control system for slag separation production line according to claim 1, characterized in that: The feeding system includes two sets of feeding bar screens, one for use and one for standby. The grading particle size of the bar screen is 100mm. The forklift loads the materials onto the bar screen for primary sorting. The materials smaller than 100mm fall into the 2# belt; the slag blocks larger than 100mm enter the drop hammer room for slag beating, and the large pieces of steel slag are selected. The remaining materials are crushed by the jaw crusher and then merged into the 2# belt through the 1# belt.

3. The centralized control system for slag separation production line according to claim 2, characterized in that: The conveying system includes 1#-12# belt conveyors, 1# and 2# belt conveyors are used to convey materials below 100mm, 3# and 6# belt conveyors are used to convey materials below 30mm, 4# and 5# belt conveyors are used to convey materials between 30-100mm, 7# and 9# belt conveyors are used to convey materials between 10-30mm, 8# belt conveyor is used to convey materials crushed by a cone crusher, 10# and 11# belt conveyors are used to convey materials below 10mm, and 12# belt conveyor conveys materials removed by the iron remover of the 5# belt conveyor.

4. The centralized control system for slag separation production line according to claim 3 is characterized in that: The crushing system includes a jaw crusher and an inertia cone crusher.

5. The centralized control system for steel slag sorting production line according to claim 2, characterized in that: The screening system includes 1# vibrating screen and 2# vibrating screen. 1# vibrating screen is an environmentally friendly high-elastic screen with 3 sets of vibrating units. The screen plate is made of high-elastic polyurethane with a long service life. The screen body is fully sealed and equipped with a dust cover. The grading particle size is 30mm. Slag and steel particles with large particle sizes can be directly returned to the steel plant. At the same time, the particle size of the materials entering the cone crusher is guaranteed to be less than 30mm; 2# vibrating screen is an environmentally friendly multi-frequency screen with 2 sets of vibrating units with a long service life. The screen body is fully sealed and equipped with a dust cover. The grading particle size is 10mm. 10-30mm materials are screened and enter the cone crusher. Materials below 10mm are obtained by passing through a 10# belt conveyor and a magnetic separation to obtain tailings. The vibration frequency of the two sets of vibrating screens is adjustable.

6. The centralized control system for slag separation production line according to claim 2, characterized in that: The magnetic separation system includes 2 iron removers and 2 magnetic drums. The RCDK-8T electromagnetic armored iron remover used in the production line adopts a fully enclosed magnetic system structure. The unique internal and external double coil structure prevents the coil from direct contact with the outside world. A multi-scraper armored iron unloading belt is adopted, and a wear-resistant protective plate with a shielding effect is added to the mother belt. The two magnetic separation drums are CTDG0608 type, one for primary magnetic separation (rough selection) and one for secondary magnetic separation (fine selection). The rough selection requires that the elemental iron content of the tailings is controlled within 3%, and the fine selection requires that the iron grade of the finished product is above 50%.

7. A centralized control method for a slag separation production line, characterized in that , realize interlocking control and remote centralized control between various devices in the system, reverse material flow starts, and forward material flow stops. The control method includes the following steps: Press the start process button on the operation screen: (1) The system automatically determines whether the startup conditions are met: 2# belt conveyor, 3# belt conveyor, 4# belt conveyor, 5# belt conveyor, 6# belt conveyor, 7# belt conveyor, 9# belt conveyor, 10# belt conveyor, 11# belt conveyor, 12# belt conveyor, 1# iron remover, 2# iron remover, primary magnetic separation drum, and secondary magnetic separation drum all meet the centralized control, automatic control and no fault alarm status. (2) Feeding selection: The feeding bar screen needs to be manually selected on the operation screen. If the 1# feeding bar screen is selected, the 1# vibrating feeder on-site control box needs to be in remote state, and there is no fault alarm. At the same time, the 1# feeding bar screen is ready and there is no fault alarm. Similarly, if the 2# feeding bar screen is selected, the 2# vibrating feeder on-site control box needs to be in remote state, and there is no fault alarm. At the same time, the 2# feeding bar screen is ready and there is no fault alarm. (3) Automatic operation after material selection: Automatic operation starts from the end equipment of the slag sorting process. 100ms after the automatic operation starts, the 11# belt and the 9# belt start running. 10s after the 11# belt running signal is fed back, the 10# belt starts running. 10s after the 9# belt running signal is fed back, the 2# iron remover starts running. 10s after the 2# iron remover excitation operation and belt running feedback signals are received, the 7# belt is started. 10s after the 10# belt and 7# belt running signal feedback is confirmed, the 2# vibrating screen is started. 10s after the 2# vibrating screen running signal feedback is confirmed, the 12# belt and the 6# belt are started. 1) 10 seconds after the 6# belt is started, start the 3# belt, confirm the feedback of the running signal of the 3# belt and the 4# belt, and then start the 1# vibrating screen 10 seconds later. After confirming the feedback of the running signal of the 1# vibrating screen, start the 2# belt 10 seconds later. After the 2# belt is running, start the vibrating feeder 10 seconds later. 2) 10 seconds after the 12# belt is started, start the 1# iron remover, wait for the 1# iron remover excitation operation and belt operation feedback signal to be received, then start the 5# belt 10 seconds after starting, and start the 4# belt 10 seconds after confirming the 5# belt operation signal.

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