Gas supply system of vacuum smelting furnace

Abstract

The utility model discloses a gas supply system of a vacuum smelting furnace, which belongs to the technical field of metallurgy and comprises a control host, an oxygen-enriched air supply component, an argon supply component and a nitrogen supply component, and the oxygen-enriched air supply component, the argon supply component and the nitrogen supply component are electrically connected with the control host through control cables. The oxygen-enriched air supply assembly, the argon supply assembly and the nitrogen supply assembly are respectively communicated with the vacuum smelting furnace through air supply pipelines, and the control host controls the oxygen-enriched air supply assembly, the argon supply assembly or the nitrogen supply assembly to supply oxygen-enriched air, argon or nitrogen into the vacuum smelting furnace. According to the utility model, the automatic switching supply of oxygen-enriched air, argon and nitrogen of the vacuum smelting furnace can be realized, and the vacuum smelting process requirements of tinplate can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical technique field especially relates to a gas supply system of vacuum smelting furnace. BACKGROUND

[0002] In the production process of tinplate T-5N (1), argon is used as the lifting gas in the vacuum treatment process, and after the vacuum treatment is completed, manganese nitride cored wire is used to increase the nitrogen content of the molten steel, and during the wire feeding process, the molten steel boils violently, which poses a great safety hazard; at the same time, due to the boiling during wire feeding, the steel slag interface reaction is large, which leads to large aluminum loss, and the aluminum oxide products affect the stability of the liquid surface during continuous casting and pouring, which adversely affects the product quality. SUMMARY

[0003] The technical problem solved by the utility model is that, in view of the technical problem of molten steel boiling and large aluminum loss in the tinplate production process, the utility model provides a gas supply system of vacuum smelting furnace, which can realize automatic switching of oxygen-enriched air, argon and nitrogen supply of the vacuum smelting furnace, and meets the requirements of the tinplate vacuum smelting process.

[0004] Technical scheme: The utility model discloses a gas supply system of vacuum smelting furnace, which comprises a control host and an oxygen-enriched air supply assembly, an argon gas supply assembly and a nitrogen gas supply assembly electrically connected with the control host through a control cable, wherein the oxygen-enriched air supply assembly, the argon gas supply assembly and the nitrogen gas supply assembly are respectively communicated with the vacuum smelting furnace through gas supply pipelines, and the control host controls the oxygen-enriched air supply assembly, the argon gas supply assembly or the nitrogen gas supply assembly to supply oxygen-enriched air, argon or nitrogen into the vacuum smelting furnace.

[0005] Preferably, the oxygen-enriched air supply assembly, the argon gas supply assembly and the nitrogen gas supply assembly each comprise a semi-automatic switcher, the outlet end of the semi-automatic switcher is communicated with the corresponding gas supply pipeline, and a delivery ball valve is connected to the gas supply pipeline; the two inlet ends of the semi-automatic switcher are respectively connected with a gas feeding control valve and a high-pressure rubber pipe, and a filter and a gas storage tank are connected to each high-pressure rubber pipe.

[0006] Preferably, each gas storage tank and the gas feeding control valve connected thereto are communicated with one port of a three-way connector, the other port of the three-way connector is communicated with one port of the semi-automatic switcher, and the other port of the three-way connector is connected with an air inlet branch pipe, an air inlet control valve corresponding to the gas storage tank is arranged on the air inlet branch pipe, and the air inlet branch pipes corresponding to the two groups of gas storage tanks are communicated with one air inlet main pipe.

[0007] Preferably, the semi-automatic switcher is respectively provided with a pressure sensor corresponding to the two groups of gas storage tanks, and the corresponding pressure sensors are electrically connected with the control host through control cables.

[0008] Preferably, the oxygen-enriched air supply assembly, the argon gas supply assembly and the nitrogen gas supply assembly are sequentially connected with a smelting furnace gas inlet manual valve and a smelting furnace gas inlet automatic valve at the end of the gas supply pipeline, and the smelting furnace gas inlet automatic valve is electrically connected with the control host.

[0009] Preferably, the control host is connected with a plurality of alarm probe heads through a communication cable, and the alarm probe heads are arranged at the detection position.

[0010] Compared with the prior art, the utility model has at least the following beneficial effects:

[0011] The utility model discloses a gas supply system for vacuum furnace smelting process is optimized in automation, increases nitrogen gas pipeline at vacuum furnace lifting gas station, closes argon gas channel when smelting tinplate T-5N (1), switches into nitrogen gas as lifting gas, and the purpose of molten steel nitrogen increase is realized to the molten steel through nitrogen, and part of nitriding manganese alloy is added simultaneously, and the purpose of molten steel nitrogen increase is realized, and through using nitrogen as lifting gas, not only eliminates the security risk of molten steel boiling in the process of feeding wire, improves molten steel quality, and reduces smelting cost simultaneously.

[0012] The utility model also has other beneficial effects, which are described in the embodiment part of the specification, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the gas supply system structure schematic diagram of the utility model;

[0014] Figure 2 It is Figure 1 It is oxygen-enriched air / argon / nitrogen gas supply assembly structure schematic diagram.

[0015] Fig. 1 is a gas supply system structure schematic diagram of the utility model; DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, specific embodiments will be described in detail below with reference to the accompanying drawings. Figures 1-2The technical solutions of the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art belong to the scope of protection of the utility model.

[0017] As Figure 1 The utility model discloses an oxygen -enriched air gas supply assembly 6, argon gas supply assembly 7 and nitrogen gas supply assembly 8 are communicated with vacuum smelting furnace 10 through gas supply pipeline 9, and control host computer 1 controls oxygen -enriched air gas supply assembly 6, argon gas supply assembly 7 or nitrogen gas supply assembly 8 to supply oxygen -enriched air, argon or nitrogen to vacuum smelting furnace 10. The gas supply system 100 in the vacuum furnace smelting process is optimized by automation, nitrogen pipeline is added in the vacuum furnace lifting gas station, when smelting tinplate T-5N (1), argon channel is closed, and nitrogen is switched to as lifting gas, and the purpose of increasing nitrogen in molten steel is realized by adding part of nitriding manganese alloy to molten steel through nitrogen. By using nitrogen as lifting gas, not only the safety hazard of molten steel boiling in the feeding process is eliminated, but also the quality of molten steel is improved, and the smelting cost is reduced. After adopting the gas supply system 100, the deoxidizing alloying with aluminum is reduced by 33Kg / oven, the crystallizer liquid level fluctuation standard rate is 93.11%, and the standard rate is improved by 5.73% compared with the original feeding cored wire process.

[0018] As Figure 2 The utility model discloses an oxygen -enriched air gas supply assembly 6, argon gas supply assembly 7 and nitrogen gas supply assembly 8 are communicated with vacuum smelting furnace 10 through gas supply pipeline 9, and control host computer 1 controls oxygen -enriched air gas supply assembly 6, argon gas supply assembly 7 or nitrogen gas supply assembly 8 to supply oxygen -enriched air, argon or nitrogen to vacuum smelting furnace 10. The gas supply system 100 in the vacuum furnace smelting process is optimized by automation, nitrogen pipeline is added in the vacuum furnace lifting gas station, when smelting tinplate T-5N (1), argon channel is closed, and nitrogen is switched to as lifting gas, and the purpose of increasing nitrogen in molten steel is realized by adding part of nitriding manganese alloy to molten steel through nitrogen. By using nitrogen as lifting gas, not only the safety hazard of molten steel boiling in the feeding process is eliminated, but also the quality of molten steel is improved, and the smelting cost is reduced. After adopting the gas supply system 100, the deoxidizing alloying with aluminum is reduced by 33Kg / oven, the crystallizer liquid level fluctuation standard rate is 93.11%, and the standard rate is improved by 5.73% compared with the original feeding cored wire process.

[0019] As Figure 2As shown, each gas storage tank 13 and its connected gas supply control valve 16 are connected to one port of the connecting tee 22. The other end of the connecting tee 22 is connected to one port of the semi-automatic switch 17, and the other port of the connecting tee 22 is connected to the inlet branch pipe 23. The inlet branch pipe 23 is equipped with an inlet control valve 20 corresponding to the gas storage tank 13. The inlet branch pipes 23 connected to the two sets of gas storage tanks 13 are connected to a main inlet pipe 19. By selecting the two inlet branch pipes 23 connected to the main inlet pipe 19, the corresponding gas storage tank 13 can be filled with gas, thereby meeting the replenishment needs of the gas supply system 100.

[0020] like Figure 2 As shown, the semi-automatic switch 17 is equipped with pressure sensors 21 corresponding to the two sets of gas storage tanks 13, and the corresponding pressure sensors 21 are electrically connected to the control host 1 through the control cable 2. The control host 1 monitors the gas supply pressure of the corresponding gas storage tank 13 through the pressure sensors 21 and controls the gas supply and replenishment of the oxygen-enriched air supply component 6, the argon gas supply component 7 and the nitrogen gas supply component 8.

[0021] like Figure 1 As shown, the gas supply pipelines 9 corresponding to the oxygen-enriched air supply component 6, the argon gas supply component 7, and the nitrogen gas supply component 8 are sequentially connected to a smelting furnace inlet manual valve 11 and a smelting furnace inlet automatic valve 12. The smelting furnace inlet automatic valve 12 is electrically connected to the control host 1. The smelting furnace inlet manual valve 11 is in a normally open state. The control host 1 controls the opening or closing of the smelting furnace inlet automatic valve 12 to select the gas supply to the vacuum smelting furnace 10.

[0022] like Figure 1 As shown, the control host 1 is connected to multiple alarm probes 4 via communication cables 3, and the alarm probes 4 are correspondingly installed at the workstations to be tested. This gas supply system 100, through the control host 1, can realize functions such as automatic selection of gas supply type, leak monitoring and alarm, and low-pressure alarm.

[0023] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A gas supply system for a vacuum melting furnace, characterized in that The gas supply system (100) comprises a control host (1), an oxygen-enriched air supply assembly (6), an argon gas supply assembly (7) and a nitrogen gas supply assembly (8) electrically connected with the control host (1) through a control cable (2), the oxygen-enriched air supply assembly (6), the argon gas supply assembly (7) and the nitrogen gas supply assembly (8) are communicated with a vacuum smelting furnace (10) through a gas supply pipeline (9) respectively, and the control host (1) controls the oxygen-enriched air supply assembly (6), the argon gas supply assembly (7) or the nitrogen gas supply assembly (8) to supply oxygen-enriched air, argon or nitrogen into the vacuum smelting furnace (10).

2. The gas feeding system of a vacuum melting furnace according to claim 1, characterized by, The oxygen-enriched air supply assembly (6), the argon gas supply assembly (7) and the nitrogen gas supply assembly (8) each comprise a semi-automatic switcher (17), the outlet end of the semi-automatic switcher (17) is communicated with the corresponding gas supply pipeline (9), and a conveying ball valve (18) is connected on the gas supply pipeline (9); two inlet ends of the semi-automatic switcher (17) are connected with a gas sending control valve (16) and a high-pressure rubber pipe (14) respectively, and a filter (15) and a gas storage tank (13) are connected on each high-pressure rubber pipe (14).

3. The gas feeding system of a vacuum melting furnace according to claim 2, wherein Each gas storage tank (13) and the connected gas sending control valve (16) are communicated with one port of a three-way connector (22), the other end of the three-way connector (22) is communicated with one port of the semi-automatic switcher (17), and the other port of the three-way connector (22) is connected with a gas inlet branch pipe (23), the gas inlet branch pipe (23) is provided with a gas inlet control valve (20) corresponding to the gas storage tank (13), and the corresponding gas inlet branch pipes (23) of the two groups of gas storage tanks (13) are communicated with one gas inlet main pipe (19).

4. The gas feeding system of a vacuum melting furnace according to claim 3, wherein The semi-automatic switcher (17) is provided with a pressure sensor (21) corresponding to each group of gas storage tanks (13), and the corresponding pressure sensor (21) is electrically connected with the control host (1) through the control cable (2).

5. The gas supply system of a vacuum melting furnace according to any one of claims 1 to 4, characterized in that The end of the corresponding gas supply pipeline (9) of the oxygen-enriched air supply assembly (6), the argon gas supply assembly (7) and the nitrogen gas supply assembly (8) is sequentially connected with a smelting furnace gas inlet manual valve (11) and a smelting furnace gas inlet automatic valve (12), and the smelting furnace gas inlet automatic valve (12) is electrically connected with the control host (1).

6. The gas feeding system of a vacuum melting furnace according to claim 5, wherein The control host (1) is connected with a plurality of alarm probe heads (4) through a communication cable (3), and the alarm probe heads (4) are arranged at the detection positions.

Images