Device for prolonging service life of DRI distributing device of European smelting furnace

Abstract

The utility model belongs to the technical field of European smelting furnaces, and particularly discloses a device for prolonging the service life of a DRI distributing device of an European smelting furnace, which comprises a stepped shaft, a frame and the stepped shaft which are rotatably connected, a pull rod is fixedly connected on the stepped shaft, a telescopic end of a hydraulic cylinder is hinged on the pull rod, the hydraulic cylinder is rotatably connected on a furnace shell, and the stepped shaft is fixedly connected with a main shaft. A distribution plate is welded on the main shaft, a cooling mechanism is arranged on the DRI distributor, the main shafts on the two sides of the DRI distributor are changed into stepped shafts, the main shafts on the two sides of the DRI distributor are evenly stressed, the torque of the main shafts is increased, and therefore the service life of the DRI distributor is prolonged, when the temperature of the DRI distributor is too high, heat loss borne by the DRI distributor is reduced through the cooling mechanism, and the service life of the DRI distributor is prolonged. The problems that in the prior art, main shafts of a DRI distributor are connected through threads, and the main shafts on the two sides of a frame are uneven in stress and prone to abrasion are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of EAF, in particular to a device for prolonging the service life of the DRI distributor of the EAF. Background Technique

[0002] The EAF is mainly used to extract iron from iron ore. Through two stages of reduction and melting, iron ore, coal and other necessary raw materials are subjected to high-temperature treatment in the furnace, and chemical reactions occur, and finally molten iron is produced. During the refining process, the main function of the DRI distributor is to add materials into the melting gasifier according to a predetermined distribution pattern to optimize the distribution of materials and the distribution of coal gas flow in the furnace, so as to improve the production capacity of the EAF and reduce fuel consumption. In the existing technology, the main shaft of the DRI distributor is connected by threads, and the main shafts on both sides of the frame are unevenly stressed and prone to wear. Content of the Utility Model

[0003] The purpose of the utility model is to provide a device for prolonging the service life of the DRI distributor of the EAF to solve the problem that in the existing technology, the main shaft of the DRI distributor is connected by threads, and the main shafts on both sides of the frame are unevenly stressed and prone to wear.

[0004] To achieve the above object, the basic scheme provided by the utility model is: a device for prolonging the service life of the DRI distributor of the EAF, including a stepped shaft, the frame is rotationally connected to the stepped shaft, a pull rod is fixedly connected to the stepped shaft, the telescopic end of a hydraulic cylinder is hinged to the pull rod, the hydraulic cylinder is rotationally connected to the furnace shell, the stepped shaft is fixedly connected to the main shaft, a distribution plate is welded to the main shaft, and a cooling mechanism is provided on the DRI distributor.

[0005] The principle and beneficial effects of the utility model are as follows: during use, the telescopic movement of the hydraulic cylinder drives the pull rod to rotate, thereby driving the stepped shaft and the distribution plate to rotate. When the temperature of the DRI distributor is too high, the cooling mechanism reduces the heat loss received by the DRI distributor. The main shafts on both sides of the DRI distributor are changed from being connected by threads to an integral stepped shaft. This structure enables the main shafts on both sides to be evenly stressed, increases the torque of the main shaft, and thus prolongs the service life of the DRI distributor.

[0006] Scheme 2, which is the preference of the basic scheme. A screw conveyor is flange-connected to the DRI distributor. A dynamic torque sensor is provided on the end face of the screw conveyor. The output end of the dynamic torque sensor is electrically connected to a PLC controller, and the PLC controller is electrically connected to the hydraulic cylinder; the torque of the screw conveyor is monitored in real time through the dynamic torque sensor. When the torque is too large, the dynamic torque sensor sends a signal to the PLC controller, and the PLC controller controls the telescopic movement of the hydraulic cylinder to control the forward and reverse rotation of the distribution plate, reducing the occurrence of material jamming in the DRI distributor, thereby reducing the wear of the main shaft and increasing the service life of the main shaft.

[0007] Solution 3, which is the optimization of the basic solution. The dynamic torque sensor is a torsion bar type torque sensor; the torsion bar type torque sensor belongs to a contact type torque sensor and has high measurement accuracy.

[0008] Solution 4, which is the optimization of the basic solution. The cooling mechanism includes a temperature sensor. The temperature sensor is in contact with the DRI spreader, and the temperature sensor is electrically connected to a PLC controller, and the PLC controller is electrically connected to a cooling component; the temperature of the DRI spreader is monitored in real time through the temperature sensor. When the temperature of the DRI spreader is higher than 200 degrees, the temperature sensor sends a signal to the PLC controller, and the PLC controller controls the cooling component to cool the DRI spreader through the cooling component, reducing the heat loss of the DRI spreader.

[0009] Solution 5, which is the optimization of the basic solution. The cooling component includes a nitrogen gas pipe and a spray pipe. A nitrogen gas pressure stabilizing tank is fixedly connected to the nitrogen gas pipe, and a water pump is fixedly connected to the spray pipe. Both the nitrogen gas pressure stabilizing tank and the water pump are electrically connected to the PLC controller; when the temperature is between 200°-300°, the PLC controller controls to open the nitrogen gas pressure stabilizing tank, and nitrogen gas is sprayed through the nitrogen gas pipe to cool the DRI spreader. When the temperature is between 300°-400°, the PLC controller controls to open the water pump, and water is sprayed through the spray pipe to cool the DRI spreader.

[0010] Solution 6, which is the optimization of the basic solution. The temperature sensor is a thermocouple temperature sensor; the thermocouple temperature sensor has stable performance, a large temperature measurement range, and the signal can be transmitted over a long distance. Description of the Drawings

[0011] Figure 1 is a perspective view of a device for prolonging the service life of the DRI spreader of an EAF in the present utility model;

[0012] Figure 2 is an installation schematic diagram of a device for prolonging the service life of the DRI spreader of an EAF in the present utility model;

[0013] Figure 3 is a top view of the installation of a device for prolonging the service life of the DRI spreader of an EAF in the present utility model;

[0014] Figure 4 is Figure 3 the cross-sectional view of A-A in Detailed Description of the Invention

[0015] The present utility model will be further described in detail below through specific embodiments:

[0016] The reference numerals in the drawings of the specification include: 1. stepped shaft, 2. cloth plate, 3. frame, 4. hydraulic cylinder, 6. temperature sensor, 7. spray pipe, 8. screw conveyor, 9. main shaft, 10. nitrogen pipe, 11. DRI distributor, 12. dynamic torque sensor, 13. pull rod, 14. furnace shell, 15. nitrogen pressure stabilizing tank, 16. water pump.

[0017] Embodiment

[0018] As Figures 1 to 4 shown: A device for extending the service life of the DRI distributor of an EAF includes a stepped shaft 1. The frame 3 is rotatably connected to the stepped shaft 1. A pull rod 13 is fixedly connected to the stepped shaft 1. The telescopic end of a hydraulic cylinder 4 is hinged to the pull rod 13. The hydraulic cylinder 4 is rotatably connected to the furnace shell 14. A screw conveyor 8 is flange-connected to the upper part of the DRI distributor 11. A dynamic torque sensor 12 is provided on the end face of the screw conveyor 8. The dynamic torque sensor 12 is a torsion bar type torque sensor. The output end of the dynamic torque sensor 12 is electrically connected to a PLC controller. The PLC controller is electrically connected to the hydraulic cylinder 4. The stepped shaft 1 is fixedly connected to the main shaft 9. A cloth plate 2 is welded on the main shaft 9. A temperature reduction mechanism is provided on the DRI distributor 11. The temperature reduction mechanism includes a temperature sensor 6. The temperature sensor 6 is a thermocouple temperature sensor. The temperature sensor 6 is electrically connected to the PLC controller. The PLC controller is electrically connected to a temperature reduction component. The temperature reduction component includes a nitrogen pipe 10 and a spray pipe 7. A nitrogen pressure stabilizing tank 15 is fixedly connected to the nitrogen pipe 10. A water pump 16 is fixedly connected to the spray pipe 7. Both the nitrogen pressure stabilizing tank 15 and the water pump 16 are electrically connected to the PLC controller.

[0019] The implementation mode of this embodiment is as follows: During use, the screw conveyor 8 uses a motor to drive the screw to rotate and push the material to feed the DRI distributor 11. During the feeding process, the dynamic torque sensor 12 monitors the torque of the screw conveyor 8 in real time. When the torque of the screw conveyor 8 is too large, the dynamic torque sensor 12 sends a signal to the PLC controller. The PLC controller drives the pull rod 13, the stepped shaft 1 and the main shaft 9 to rotate by controlling the telescopic movement of the telescopic end of the hydraulic cylinder 4, so as to drive the cloth plate 2 to rotate forward and backward. When the temperature of the DRI distributor 11 changes, the temperature of the DRI distributor 11 is monitored in real time through the temperature sensor 6. When the temperature of the DRI distributor 11 is higher than 200 degrees, the temperature sensor 6 sends a signal to the PLC controller. When the temperature of the DRI distributor 11 is between 200° and 300°, the PLC controller controls to open the nitrogen pressure stabilizing tank 15, and nitrogen is sprayed through the nitrogen pipe 10 to cool the DRI distributor 11. When the temperature is between 300° and 400°, the PLC controller controls to open the water pump 16, and water is sprayed through the spray pipe 7 to cool the DRI distributor 11.

[0020] The above are only embodiments of the present utility model, and common knowledge such as specific structures and characteristics known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several modifications and improvements can be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope claimed in this application shall be subject to the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A device for prolonging the service life of the DRI distributor of an EAF, characterized in that, It includes a stepped shaft (1) and a frame (3). The frame (3) is rotatably connected to the stepped shaft (1). A pull rod (13) is fixedly connected to the stepped shaft (1). The telescopic end of a hydraulic cylinder (4) is hinged to the pull rod (13). The hydraulic cylinder (4) is rotatably connected to the furnace shell (14). The stepped shaft (1) is fixedly connected to the main shaft (9). A distributing plate (2) is welded to the main shaft (9). A cooling mechanism is provided outside the DRI distributor (11).

2. The device for prolonging the service life of the DRI feeder of the EAF steelmaking furnace according to claim 1, characterized in that , A screw conveyor (8) is flange-connected to the DRI distributor (11). A dynamic torque sensor (12) is provided on the screw conveyor (8). The output end of the dynamic torque sensor (12) is electrically connected to a PLC controller. The PLC controller is electrically connected to the hydraulic cylinder (4).

3. The device for prolonging the service life of the DRI feeder of the EAF steelmaking furnace according to claim 2, wherein, The dynamic torque sensor (12) is a torsion bar type torque sensor.

4. A device for extending the service life of the DRI feeder of the Ouye furnace according to claim 1, characterized in that, The cooling mechanism includes a temperature sensor (6). The temperature sensor (6) is in contact with the DRI distributor (11). The temperature sensor (6) is electrically connected to the PLC controller. The PLC controller is electrically connected to a cooling component.

5. The device for prolonging the service life of the DRI feeder of the EAF steelmaking furnace according to claim 4, wherein, The cooling component includes a nitrogen pipe (10) and a spray pipe (7). A nitrogen gas pressure stabilizing tank (15) is fixedly connected to the nitrogen pipe (10). A water pump (16) is fixedly connected to the spray pipe (7). Both the nitrogen gas pressure stabilizing tank (15) and the water pump (16) are electrically connected to the PLC controller.

6. The device for extending the service life of the DRI feeder of the EAF according to claim 4, characterized in that, The temperature sensor (6) is a thermocouple temperature sensor.

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