Alloy feeding device with nitrogen sealing and water cooling functions for LF refining furnace

Abstract

The utility model discloses an alloy feeding device with nitrogen sealing and water cooling functions for an LF refining furnace, and relates to the technical field of refining furnace auxiliary equipment in the metallurgical industry. The discharging device comprises a discharging elephant trunk. A material receiving hopper is arranged below the blanking articulated chute; the upper end of the discharging chute is fixedly and hermetically communicated with an external feeding device, and the lower end is used for guiding materials into the receiving hopper; a protective cover plate is hinged to an outlet in the lower end of the discharging chute; the protective cover plate is located between the discharging elephant trunk and the receiving hopper. The protective cover plate is used for blocking a gap between the lower end of the discharging elephant trunk and the upper end of the receiving hopper. The lower end of the receiving hopper fixedly communicates with a feeding port; the lower end of the charging hole is fixedly communicated with a furnace cover of the LF refining furnace; a nitrogen sealing assembly is installed on the discharging elephant trunk. A water cooling assembly is installed on the feeding opening. The device has the beneficial effects that harmful smoke in the LF refining furnace can be prevented from escaping to the peripheral environment or entering rear equipment, and the safety and the environmental protection property are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for refining furnaces in the metallurgical industry, in particular to an alloy feeding device with nitrogen sealing and water cooling for an LF refining furnace. Background Art

[0002] LF refining furnace, or ladle refining furnace, is the main off-furnace refining equipment in steel production. During the refining process of LF refining furnace, alloy powder materials need to be added to adjust the composition of molten steel. However, some toxic and harmful fumes will be generated during the refining process. Traditional feeding devices can easily cause harmful fumes to overflow above the refining furnace or enter the rear equipment along the feeding channel, which can easily lead to personnel safety and environmental problems. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an alloy feeding device with nitrogen sealing and water cooling for an LF refining furnace in view of the above-mentioned technical deficiencies, which can prevent harmful flue gas in the LF refining furnace from escaping to the surrounding environment or entering the rear equipment, thereby improving safety and environmental protection.

[0004] The technical scheme adopted by the utility model is: to provide an alloy feeding device with nitrogen sealing and water cooling for an LF refining furnace, comprising a feeding chute; a receiving hopper is arranged below the feeding chute; the upper end of the feeding chute is fixedly and sealedly connected with an external feeding device, and the lower end is used to introduce materials into the receiving hopper; a protective cover plate is hingedly connected to the outlet of the lower end of the feeding chute; the protective cover plate is located between the feeding chute and the receiving hopper; the protective cover plate is used to block the gap between the lower end of the feeding chute and the upper end of the receiving hopper; a feeding port is fixedly connected at the lower end of the receiving hopper; the lower end of the feeding port is fixedly connected to the furnace cover of the LF refining furnace; a nitrogen sealing component is installed on the feeding chute; and a water cooling component is installed on the feeding port;

[0005] The nitrogen sealing assembly comprises a distribution shell which is sealed and fixed on the outer wall of the material discharge chute; an annular distribution air passage is left between the distribution shell and the material discharge chute; an air inlet pipe is fixed on the outside of the distribution shell; two ends of the air inlet pipe are respectively connected with two ends of the distribution air passage in radial direction; a nitrogen inlet is fixedly connected in the middle of the air inlet pipe; exhaust holes are evenly opened on the inner wall of the material discharge chute along the circumferential direction; and the exhaust holes are all connected with the distribution air passage;

[0006] The water cooling assembly comprises a water inlet and a water outlet respectively fixed on the outer wall of the feeding port; the outer wall of the feeding port is a sandwich structure; a water cooling cavity is correspondingly reserved in the outer wall of the feeding port; the water inlet and the water outlet are both connected to the water cooling cavity.

[0007] To further optimize the technical solution, a LF refining furnace with a nitrogen-sealed and water-cooled alloy feeding device has a feed chute that is inclined at 45 degrees up and down.

[0008] To further optimize the technical solution, an LF refining furnace with a nitrogen-sealed and water-cooled alloy charging device has a hopper whose upper part is wider than the lower part.

[0009] To further optimize the technical solution, a water inlet of an LF refining furnace with a nitrogen-sealed and water-cooled alloy feeding device is located below the water outlet.

[0010] The beneficial effects of the utility model are as follows: the device is equipped with a nitrogen sealing component and a protective cover plate, which can effectively prevent harmful smoke from entering the external feeding device or even the other equipment behind along the material chute, and at the same time, the protective cover plate blocks the gap between the lower end of the material chute and the upper end of the receiving hopper, which can effectively prevent harmful smoke from escaping from above the furnace cover to the surrounding environment, avoiding safety and environmental problems. The water cooling component used in the feeding port can effectively reduce the temperature of the device, preventing deformation and damage of the device due to overheating, difficulty in maintenance, short service life, poor safety and other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 For nitrogen sealing components Figure 1 Sectional view along line AA;

[0013] Figure 3 A schematic diagram of the structure of the water cooling component.

[0014] In the figure, 1. material discharge chute; 2. material receiving hopper; 3. protective cover; 4. material feeding port; 5. distribution shell; 6. distribution air duct; 7. air inlet pipe; 8. nitrogen inlet; 9. exhaust hole; 10. water inlet; 11. water outlet; 12. water cooling cavity. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0016] like Figure 1 As shown, an alloy feeding device with nitrogen sealing and water cooling for an LF refining furnace comprises a feeding chute 1; a receiving hopper 2 is arranged below the feeding chute 1; the upper end of the feeding chute 1 is fixedly and sealedly connected with an external feeding device (flange connection can be adopted), and the lower end is used to introduce materials into the receiving hopper 2; the outlet of the lower end of the feeding chute 1 is hingedly connected with a protective cover plate 3; the protective cover plate 3 is located between the feeding chute 1 and the receiving hopper 2; the protective cover plate 3 is used to block the gap between the lower end of the feeding chute 1 and the upper end of the receiving hopper 2; the lower end of the receiving hopper 2 is fixedly connected with a feeding port 4 (flange connection can be adopted); the lower end of the feeding port 4 is fixedly connected to the furnace cover of the LF refining furnace (welding can be adopted); a nitrogen sealing component is installed on the feeding chute 1; a water cooling component is installed on the feeding port 4;

[0017] like Figure 2 As shown, the nitrogen sealing assembly comprises a distribution shell 5 which is sealed and fixed on the outer wall of the material discharge chute 1; an annular distribution air passage 6 is left between the distribution shell 5 and the material discharge chute 1; an air inlet pipe 7 is fixed to the outside of the distribution shell 5; the two ends of the air inlet pipe 7 are respectively connected to the two ends of the distribution air passage 6 in the radial direction; a nitrogen inlet 8 is fixedly connected to the middle of the air inlet pipe 7; exhaust holes 9 are uniformly opened on the inner wall of the material discharge chute 1 along the circumferential direction; the exhaust holes 9 are all connected to the distribution air passage 6;

[0018] like Figure 3 As shown, the water cooling component includes a water inlet 10 and a water outlet 11 respectively fixed on the outer wall of the feeding port 4; the outer wall of the feeding port 4 is a sandwich structure; a water cooling cavity 12 is correspondingly reserved in the outer wall of the feeding port 4; the water inlet 10 and the water outlet 11 are both connected to the water cooling cavity 12.

[0019] When adding alloy materials into the LF refining furnace, firstly, the cover of the LF refining furnace is transferred to the top of the LF refining furnace by rotating the external turntable, and then the receiving hopper 2 can be moved to a position relatively connected with the discharge chute 1 above.

[0020] Thereafter, nitrogen is filled in through the nitrogen inlet 8, and the nitrogen can enter the radial ends of the distribution air duct 6 more evenly through the outlets at both ends of the air inlet pipe 7, and then pass through the exhaust holes 9 evenly distributed circumferentially inside the discharge chute 1, so that the nitrogen can be more evenly distributed inside the discharge chute 1, and a sufficient nitrogen sealing area is formed inside the discharge chute 1, thereby effectively preventing the harmful flue gas in the LF refining furnace from entering the external feeding device and even the remaining equipment at the rear along the discharge chute 1; and then close the protective cover plate 3 to seal the gap between the lower end of the discharge chute 1 and the upper end of the receiving hopper 2, so as to effectively prevent the harmful flue gas from escaping from above the furnace cover to the surrounding environment.

[0021] The alloy material is transported to the discharge chute 1 through an external feeding device. After the material slides down to the lower outlet through the discharge chute 1 by gravity, it is collected by the receiving hopper 2 and finally enters the ladle in the LF refining furnace through the feeding port 4 fixed on the furnace cover.

[0022] Through the above arrangement, when adding alloy materials into the LF refining furnace, the safety and environmental protection problems caused by harmful fumes in the LF refining furnace are effectively avoided.

[0023] In addition, due to the high temperature environment in the LF refining furnace, in order to improve the stability of the charging port 4 fixed to the furnace cover and then prevent the high temperature from being transmitted upward and causing the device to be damaged by the high temperature, the device can continuously inject cooling water into the water-cooling cavity 12 in the charging port 4 through the water inlet 10, and the cooling water flows out from the water outlet 11 after flowing and cooling, so that during the charging process, the charging port 4 is continuously cooled and the device is protected from damage caused by high temperature.

[0024] like Figure 1 As shown, the material discharge chute 1 is inclined at 45 degrees up and down. During the feeding process, it is ensured that the alloy material falls smoothly and the transmission rate of the alloy material along the material discharge chute 1 is stable.

[0025] like Figure 1 As shown, the upper part of the receiving hopper 2 is wider than the lower part, so as to ensure that the alloy material can be smoothly gathered in the receiving hopper 2 and can accurately enter the ladle in the LF refining furnace through the feeding port 4.

[0026] like Figure 3 As shown, the water inlet 10 is located below the water outlet 11. The cooling water can fully flow and cool down in the water cooling cavity 12 before flowing out, effectively avoiding the problem of insufficient and uneven cooling at the feeding port 4.

[0027] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An alloy charging device for a LF refining furnace with nitrogen sealing and water cooling, characterized in that: The invention comprises a material discharge chute (1); a receiving hopper (2) is arranged below the material discharge chute (1); the upper end of the material discharge chute (1) is fixedly and sealedly connected to an external material feeding device, and the lower end is used to guide the material into the receiving hopper (2); the lower end outlet of the material discharge chute (1) is hingedly connected to a protective cover plate (3); the protective cover plate (3) is located between the material discharge chute (1) and the receiving hopper (2); the protective cover plate (3) is used to block the gap between the lower end of the material discharge chute (1) and the upper end of the receiving hopper (2); the lower end of the receiving hopper (2) is fixedly connected to a feeding port (4); the lower end of the feeding port (4) is fixedly connected to the furnace cover of the LF refining furnace; a nitrogen sealing component is installed on the material discharge chute (1); and a water cooling component is installed on the feeding port (4); The nitrogen sealing assembly comprises a distribution shell (5) which is sealed and fixed on the outer wall of the material discharge chute (1); an annular distribution air passage (6) is left between the distribution shell (5) and the material discharge chute (1); an air inlet pipe (7) is fixed on the outside of the distribution shell (5); two ends of the air inlet pipe (7) are respectively connected to two ends of the distribution air passage (6) in a radial direction; a nitrogen inlet (8) is fixedly connected in the middle of the air inlet pipe (7); exhaust holes (9) are uniformly opened on the inner wall of the material discharge chute (1) along the circumferential direction; the exhaust holes (9) are all connected to the distribution air passage (6); The water cooling component comprises a water inlet (10) and a water outlet (11) respectively fixed on the outer wall of the feeding port (4); the outer wall of the feeding port (4) is a sandwich structure; a water cooling cavity (12) is correspondingly reserved in the outer wall of the feeding port (4); the water inlet (10) and the water outlet (11) are both connected to the water cooling cavity (12).

2. The LF refining furnace according to claim 1 is provided with a nitrogen-sealed and water-cooled alloy charging device, characterized in that: The material discharge chute (1) is inclined at 45° up and down.

3. The LF refining furnace according to claim 1 is provided with a nitrogen-sealed and water-cooled alloy charging device, characterized in that: The upper part of the receiving hopper (2) is wider than the lower part.

4. The LF refining furnace according to claim 1 is provided with a nitrogen-sealed and water-cooled alloy charging device, characterized in that: The water inlet (10) is located below the water outlet (11).

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