Smelting device for producing composite deoxidizer

Abstract

The utility model discloses a kind of smelting devices for composite deoxidizer production, including smelting furnace and bottom plate, the smelting furnace is installed at the top of bottom plate, the smelting furnace inside part is for preheating upper shell and for melting lower shell, the smelting furnace is externally installed for filling into component for carrying out filling nitrogen protection to smelting furnace inside, the utility model is filled into by the cooperation of component and recovery component and controller, double-cavity independent division and component cooperation, innovation improves traditional single-cavity furnace defect, upper shell is under nitrogen protection and is focused on removing raw material moisture, oil dirt, lower shell obtains accurate anti-oxidation nitrogen, avoid preheating impurity dilution nitrogen problem, recovery component realizes nitrogen circulation purification reuse, both reduce raw material oxidation, reduce active element burning loss rate, alloy purity is greatly improved, nitrogen consumption can also be saved, reduce cost, significantly enhance the practicability and economy of equipment in composite deoxidizer production.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary material production technology for special steel smelting, specifically a smelting device for producing composite deoxidizers. Background Technology

[0002] In the production of composite deoxidizers for special steel refining, such deoxidizers must possess the core characteristics of high activity, low impurities, and stable composition. Their active components, such as Al and Ca alloys, must be precisely matched to the deoxidation requirements during special steel refining. They must quickly combine with oxygen in the molten steel while avoiding the introduction of excess impurities that could affect the purity of the steel. At the same time, the deoxidizer particles must maintain a uniform crystal structure to prevent clumping during storage or transportation and ensure uniform dispersion after being added to the molten steel.

[0003] In the smelting of alloys containing active elements such as Al and Ca, nitrogen is required to create an anti-oxidation atmosphere to prevent the active elements from reacting with air at high temperatures. Currently, most commercially available furnaces use single-cavity furnaces. During the preheating stage, impurities such as moisture and oil volatilized from the raw materials dilute the nitrogen concentration inside the furnace, disrupting the originally stable anti-oxidation atmosphere and causing the raw materials to oxidize prematurely and form oxide scale. This oxide scale is difficult to remove during subsequent melting, affecting not only the alloy purity but also increasing the burn-off rate of active elements, failing to meet the smelting requirements for high-quality alloys. Therefore, we need to propose a smelting device for producing composite deoxidizers. Utility Model Content

[0004] The purpose of this invention is to provide a smelting apparatus for producing composite deoxidizers, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a smelting apparatus for producing composite deoxidizer, comprising a smelting furnace and a bottom plate, wherein the smelting furnace is installed on top of the bottom plate, and the interior of the smelting furnace is divided into an upper shell for preheating and a lower shell for melting; The smelting furnace is equipped with a filling assembly for filling the furnace with nitrogen for protection. One end of the filling assembly extends into the interior of the upper shell and the lower shell, respectively. The smelting furnace is equipped with a recovery assembly for recycling nitrogen gas. One end of the recovery assembly extends into the interior of the upper and lower shells, respectively, and one end of the filling assembly is connected to one end of the recovery assembly.

[0006] Preferably, the filling assembly includes a nitrogen cylinder, a first filling pipe, a second filling pipe, and a third filling pipe. The nitrogen cylinder is installed outside the smelting furnace. The outlet end of the nitrogen cylinder is connected to one end of the first filling pipe. The end of the first filling pipe away from the nitrogen cylinder is connected to one end of the second filling pipe and one end of the third filling pipe, respectively. A first valve and a second valve are respectively installed on the surface of the second filling pipe and the third filling pipe.

[0007] Preferably, the smelting furnace is equipped with a partition refractory plate and an electric refractory gate valve. The partition refractory plate is horizontally arranged inside the smelting furnace. The electric refractory gate valve is exposed and installed on the upper end face of the partition refractory plate and located in the upper shell. The central axis of the valve body is collinear with the central axis of the material feeding channel, and the lower end opening of the valve body is sealed and connected to the upper end inlet of the material feeding channel.

[0008] Preferably, an annular distributor is installed inside the lower housing. The annular distributor is horizontally arranged inside the upper housing and located below the fire-resistant partition plate. The end of the second inflation pipe away from the first inflation pipe extends into the interior of the upper housing. The end of the third inflation pipe away from the first inflation pipe extends into the interior of the lower housing and communicates with one side of the annular distributor.

[0009] Preferably, the recycling assembly includes a purification box, a vacuum pump, a first suction pipe, a second suction pipe, and a third suction pipe. The purification box is installed outside the smelting furnace. The outlet of the purification box is connected to the outlet of the vacuum pump. The suction end of the vacuum pump is connected to one end of the first suction pipe. The end of the first suction pipe away from the vacuum pump is connected to one end of the second suction pipe and one end of the third suction pipe, respectively. A third valve and a fourth valve are respectively installed on the surface of the second suction pipe and the third suction pipe.

[0010] Preferably, the end of the second suction pipe away from the first suction pipe extends into the interior of the upper housing, the end of the third suction pipe away from the first suction pipe extends into the interior of the lower housing, the end of the purification box away from the vacuum pump is connected to a fourth suction pipe, the end of the fourth suction pipe away from the purification box is connected to the end of the first inflation pipe, and a fifth valve is installed on the surface of the fourth suction pipe.

[0011] Preferably, the nitrogen cylinder is fitted with a protective shell, a gas leak detector is installed on the surface of the first filling pipe, a pressure transmitter is installed on the top of the smelting furnace, an oxygen concentration sensor and a vision sensor are installed on the inner wall of the lower shell, and a controller is installed on the top of the base plate. The controller is electrically connected to the pressure transmitter, the oxygen concentration sensor and the vision sensor respectively, and the controller is also electrically connected to the electric fireproof gate valve, the purification box and the vacuum pump respectively.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention, through the cooperation of the filling component, the recovery component, and the controller, achieves independent division of labor in both chambers and collaborative operation of the components. It innovatively improves upon the shortcomings of traditional single-chamber furnaces. Under nitrogen protection, the upper shell focuses on removing moisture and oil from the raw materials, while the lower shell precisely obtains anti-oxidation nitrogen, avoiding the problem of nitrogen dilution by preheating impurities. The recovery component enables nitrogen circulation, purification, and reuse, which not only reduces raw material oxidation and the burn-off rate of active elements, but also significantly improves alloy purity, saves nitrogen consumption, and reduces costs, significantly enhancing the practicality and economy of the equipment in the production of composite deoxidizers. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the smelting furnace of this utility model; Figure 3 This is a schematic diagram of the filling component structure of this utility model; Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure in area A.

[0014] In the diagram: 1. Smelting furnace; 2. Base plate; 3. Upper shell; 4. Lower shell; 5. Nitrogen cylinder; 6. First filling pipe; 7. Second filling pipe; 8. Third filling pipe; 9. First valve; 10. Second valve; 11. Dividing refractory plate; 12. Electric refractory gate valve; 13. Circular distributor; 14. Purification box; 15. Vacuum pump; 16. First suction pipe; 17. Second suction pipe; 18. Third suction pipe; 19. Third valve; 20. Fourth valve; 21. Fifth valve; 22. Protective shell; 23. Gas leak detector; 24. Pressure transmitter; 25. Oxygen concentration sensor; 26. Controller; 27. Vision sensor; 28. Fourth suction pipe. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-4This utility model provides a technical solution: a smelting device for producing composite deoxidizer, including a smelting furnace 1 and a bottom plate 2. The smelting furnace 1 is installed on top of the bottom plate 2. The smelting furnace 1 provides a closed space for preheating and melting of raw materials. The bottom plate 2 supports the smelting furnace 1 to keep the entire equipment in a stable position. The interior of the smelting furnace 1 is divided into an upper shell 3 for preheating and a lower shell 4 for melting. The upper shell 3 is used to preheat the raw materials, and the lower shell 4 is used to melt the preheated raw materials.

[0017] A nitrogen filling assembly for nitrogen protection is installed on the outside of the smelting furnace 1. One end of the filling assembly extends into the interior of the upper shell 3 and the lower shell 4, respectively. The filling assembly includes a nitrogen cylinder 5, a first filling pipe 6, a second filling pipe 7, and a third filling pipe 8. The nitrogen cylinder 5 is installed on the outside of the smelting furnace 1 and stores nitrogen to provide a nitrogen source for the interior of the smelting furnace 1. The outlet of the nitrogen cylinder 5 is connected to one end of the first filling pipe 6. The first filling pipe 6 is connected to the second filling pipe 7 and the third filling pipe 8. The gas tube 8 delivers nitrogen and diverts it. The end of the first filling tube 6 away from the nitrogen cylinder 5 is connected to the end of the second filling tube 7 and the end of the third filling tube 8. The second filling tube 7 delivers nitrogen to the upper shell 3, and the third filling tube 8 delivers nitrogen to the annular distributor 13. The surfaces of the second filling tube 7 and the third filling tube 8 are respectively equipped with a first valve 9 and a second valve 10. The first valve 9 controls the flow and closure of nitrogen in the second filling tube 7, and the second valve 10 controls the flow and closure of nitrogen in the third filling tube 8.

[0018] The smelting furnace 1 is equipped with a partition refractory plate 11 and an electric refractory gate valve 12. The partition refractory plate 11 is horizontally set inside the smelting furnace 1. The partition refractory plate 11 separates the upper shell 3 and the lower shell 4, and a material feeding channel is opened in the center for raw materials to pass through. The electric refractory gate valve 12 controls the opening and closing of the material feeding channel by raising and lowering the gate to realize the control of raw material flow and gas isolation. The electric refractory gate valve 12 is exposed on the upper end face of the partition refractory plate 11 and located inside the upper shell 3. The central axis of its valve body is collinear with the central axis of the material feeding channel, and the lower end opening of the valve body is sealed and connected to the upper end inlet of the material feeding channel.

[0019] An annular distributor 13 is installed inside the lower shell 4. The annular distributor 13 receives nitrogen gas delivered by the third gas filling pipe 8 and distributes it evenly to form an anti-oxidation gas curtain covering the surface of the molten liquid. The annular distributor 13 is horizontally arranged inside the upper shell 3 and located below the partition refractory plate 11. The end of the second gas filling pipe 7 away from the first gas filling pipe 6 extends into the interior of the upper shell 3. The end of the third gas filling pipe 8 away from the first gas filling pipe 6 extends into the interior of the lower shell 4 and communicates with one side of the annular distributor 13.

[0020] A nitrogen recycling assembly is installed on the outside of the smelting furnace 1. One end of the recycling assembly extends into the interior of the upper shell 3 and the lower shell 4, respectively. The end of the filling assembly is connected to one end of the recycling assembly. The recycling assembly includes a purification box 14, a vacuum pump 15, a first suction pipe 16, a second suction pipe 17, and a third suction pipe 18. The purification box 14 is installed outside the smelting furnace 1. The purification box 14 purifies the recovered nitrogen containing impurities so that it can be reused. The outlet of the purification box 14 is connected to the outlet of the vacuum pump 15. The suction end of the vacuum pump 15 is connected to one end of the first suction pipe 16. The vacuum pump 15 is used for nitrogen recovery. The system provides power to extract nitrogen from the upper housing 3 and the lower housing 4. The end of the first suction pipe 16 away from the vacuum pump 15 is connected to one end of the second suction pipe 17 and the third suction pipe 18, respectively. The first suction pipe 16 collects the recovered nitrogen and delivers it to the vacuum pump 15. The second suction pipe 17 extracts nitrogen from the upper housing 3, and the third suction pipe 18 extracts nitrogen from the lower housing 4. The surfaces of the second suction pipe 17 and the third suction pipe 18 are respectively equipped with a third valve 19 and a fourth valve 20. The third valve 19 controls the flow and closure of nitrogen in the second suction pipe 17, and the fourth valve 20 controls the flow and closure of nitrogen in the third suction pipe 18.

[0021] The end of the second suction pipe 17 away from the first suction pipe 16 extends into the interior of the upper housing 3. The end of the third suction pipe 18 away from the first suction pipe 16 extends into the interior of the lower housing 4. The end of the purification chamber 14 away from the vacuum pump 15 is connected to the fourth suction pipe 28. The end of the fourth suction pipe 28 away from the purification chamber 14 is connected to the end of the first inflation pipe 6. The fourth suction pipe 28 sends the nitrogen purified by the purification chamber 14 back to the first inflation pipe 6 to realize nitrogen circulation. A fifth valve 21 is installed on the surface of the fourth suction pipe 28. The fifth valve 21 controls the flow and closing of nitrogen in the fourth suction pipe 28.

[0022] The nitrogen cylinder 5 is equipped with a protective shell 22, which protects the nitrogen cylinder 5 from damage caused by external impact. A gas leak detector 23 is installed on the surface of the first filling pipe 6 to monitor whether nitrogen leaks occur in the first filling pipe 6. A pressure transmitter 24 is installed on the top of the smelting furnace 1 to detect pressure changes inside the smelting furnace 1. An oxygen concentration sensor 25 and a vision sensor 27 are installed on the inner wall of the lower shell 4. The oxygen concentration sensor 25 detects the oxygen concentration inside the lower shell 4, and the vision sensor 27 monitors the working conditions inside the lower shell 4. A controller 26 is installed on the top of the base plate 2. The controller 26 is electrically connected to the pressure transmitter 24, the oxygen concentration sensor 25, and the vision sensor 27. The controller 26 is also electrically connected to the electric fireproof gate valve 12, the purification box 14, and the vacuum pump 15.

[0023] The controller 26 first receives the initial pressure signal inside the smelting furnace 1 from the pressure transmitter 24. If the pressure does not reach the preset micro-positive pressure value, the controller 26 controls the nitrogen cylinder 5 to open, and simultaneously opens the first valve 9 and the second valve 10. Nitrogen is diverted through the first filling pipe 6 to the second filling pipe 7 and the third filling pipe 8. The second filling pipe 7 delivers nitrogen to the upper shell 3, and the third filling pipe 8 delivers nitrogen to the annular distributor 13 inside the lower shell 4. The annular distributor 13 evenly distributes nitrogen to form an anti-oxidation gas curtain until the pressure transmitter 24 detects that the pressure inside the furnace has reached the standard. The controller 26 then adjusts the valve opening to stabilize the nitrogen supply.

[0024] When the upper shell 3 begins to preheat the raw material, the controller 26 monitors the preheating progress through a preset program. When the raw material is preheated, the controller 26 controls the gate of the electric fireproof gate valve 12 to rise, so that the preheated raw material enters the lower shell 4 through the feeding channel in the center of the separating fireproof plate 11. At the same time, the controller 26 observes the falling of the raw material and the melting situation in the lower shell 4 through the vision sensor 27. If the raw material is found to be blocked, the controller controls the gate of the electric fireproof gate valve 12 to rise and fall slightly to shake off the blocked raw material.

[0025] During the melting process of raw materials in the lower shell 4, the controller 26 receives the oxygen concentration signal fed back by the oxygen concentration sensor 25 in real time. If the concentration exceeds the standard, the controller 26 increases the nitrogen flow rate of the third gas filling pipe 8 and controls the vacuum pump 15 to start, opening the third valve 19 and the fourth valve 20. The impure nitrogen gas in the upper shell 3 and the lower shell 4 is extracted through the first suction pipe 16, the second suction pipe 17 and the third suction pipe 18 respectively. The impure nitrogen gas is transported to the purification box 14 by the vacuum pump 15 for purification treatment.

[0026] After the purification chamber 14 completes nitrogen purification, the controller 26 opens the fifth valve 21, allowing the purified nitrogen to be sent back to the first filling pipe 6 through the fourth suction pipe 28 and rejoin the nitrogen supply cycle. During this period, the controller 26 monitors the first filling pipe 6 for leaks using the gas leak detector 23. If a leak is detected, an alarm is immediately issued and the nitrogen supply scheme is adjusted. After the entire smelting process is completed, the controller 26 first controls the electric refractory gate valve 12 to close, stopping the raw material delivery, and then gradually closes the nitrogen cylinder 5 and all valves. At the same time, the vacuum pump 15 and the purification chamber 14 are shut down. Finally, the controller receives the equipment status signals from each sensor and completes the entire workflow after confirming that there are no abnormalities.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smelting apparatus for producing composite deoxidizers, comprising a smelting furnace (1) and a bottom plate (2), characterized in that: The smelting furnace (1) is installed on top of the bottom plate (2). The interior of the smelting furnace (1) is divided into an upper shell (3) for preheating and a lower shell (4) for melting. The smelting furnace (1) is equipped with a filling component for filling the interior of the smelting furnace (1) with nitrogen for protection. One end of the filling component extends into the interior of the upper shell (3) and the lower shell (4). The smelting furnace (1) is equipped with a recovery assembly for recycling nitrogen gas. One end of the recovery assembly extends into the interior of the upper shell (3) and the lower shell (4), respectively. One end of the filling assembly is connected to one end of the recovery assembly.

2. The smelting apparatus for producing composite deoxidizer according to claim 1, characterized in that: The filling assembly includes a nitrogen cylinder (5), a first filling pipe (6), a second filling pipe (7), and a third filling pipe (8). The nitrogen cylinder (5) is installed outside the smelting furnace (1). The outlet end of the nitrogen cylinder (5) is connected to one end of the first filling pipe (6). The end of the first filling pipe (6) away from the nitrogen cylinder (5) is connected to one end of the second filling pipe (7) and the third filling pipe (8), respectively. The surfaces of the second filling pipe (7) and the third filling pipe (8) are respectively equipped with a first valve (9) and a second valve (10).

3. The smelting apparatus for producing composite deoxidizer according to claim 2, characterized in that: The smelting furnace (1) is equipped with a partition refractory plate (11) and an electric refractory gate valve (12). The partition refractory plate (11) is horizontally arranged inside the smelting furnace (1). The electric refractory gate valve (12) is exposed and installed on the upper end face of the partition refractory plate (11) and located in the upper shell (3). The central axis of its valve body is collinear with the central axis of the feeding channel. The lower end opening of the valve body is sealed and connected to the upper end inlet of the feeding channel.

4. A smelting apparatus for producing a composite deoxidizer according to claim 3, characterized in that: An annular distributor (13) is installed inside the lower housing (4). The annular distributor (13) is horizontally arranged inside the upper housing (3) and located below the partition fire-resistant plate (11). The second air-filling pipe (7) extends from the end away from the first air-filling pipe (6) into the interior of the upper housing (3). The third air-filling pipe (8) extends from the end away from the first air-filling pipe (6) into the interior of the lower housing (4) and communicates with one side of the annular distributor (13).

5. A smelting apparatus for producing a composite deoxidizer according to claim 4, characterized in that: The recycling assembly includes a purification box (14), a vacuum pump (15), a first suction pipe (16), a second suction pipe (17), and a third suction pipe (18). The purification box (14) is installed outside the smelting furnace (1). The outlet of the purification box (14) is connected to the outlet of the vacuum pump (15). The suction end of the vacuum pump (15) is connected to one end of the first suction pipe (16). The end of the first suction pipe (16) away from the vacuum pump (15) is connected to one end of the second suction pipe (17) and the third suction pipe (18), respectively. The surfaces of the second suction pipe (17) and the third suction pipe (18) are respectively equipped with a third valve (19) and a fourth valve (20).

6. A smelting apparatus for producing a composite deoxidizer according to claim 5, characterized in that: The second suction pipe (17) extends away from the first suction pipe (16) to the interior of the upper housing (3), the third suction pipe (18) extends away from the first suction pipe (16) to the interior of the lower housing (4), the purification box (14) is connected to the fourth suction pipe (28) at the end away from the vacuum pump (15), the fourth suction pipe (28) at the end away from the purification box (14) is connected to the end of the first inflation pipe (6), and a fifth valve (21) is installed on the surface of the fourth suction pipe (28).

7. A smelting apparatus for producing a composite deoxidizer according to claim 6, characterized in that: The nitrogen cylinder (5) is equipped with a protective shell (22), the surface of the first filling pipe (6) is equipped with a gas leak detector (23), the top of the smelting furnace (1) is equipped with a pressure transmitter (24), the inner wall of the lower shell (4) is equipped with an oxygen concentration sensor (25) and a vision sensor (27), the top of the bottom plate (2) is equipped with a controller (26), the controller (26) is electrically connected to the pressure transmitter (24), the oxygen concentration sensor (25) and the vision sensor (27) respectively, and the controller (26) is also electrically connected to the electric fireproof gate valve (12), the purification box (14) and the vacuum pump (15) respectively.

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