Material pouring sealing device for GH4097 high-temperature mother alloy vacuum induction melting furnace

Abstract

The invention belongs to the technical field of metallurgy, and particularly discloses a pouring and sealing device for GH4097 high-temperature master alloy production, the pouring and sealing device is installed on a furnace cover of a high-temperature master alloy smelting furnace, and the high-temperature master alloy can be poured into the furnace cover by operating a pouring rod arranged in the pouring and sealing device. By means of the pouring head, bridging nodules formed by metal solid materials accumulated at a crucible opening in the smelting furnace of the high-temperature mother alloy fall back into the crucible to be continuously melted through the pouring head, the problems of accumulation and blockage of the crucible opening in the smelting furnace of the high-temperature mother alloy are effectively solved, and the smelting efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the field of metallurgical technology, and particularly relates to a charging and sealing device for a vacuum induction melting furnace of GH4097 superalloy master alloy in the field of metallurgical technology. Background Art

[0002] The smelting of GH4097 superalloy master alloy is a process of melting metals and alloys under vacuum conditions using the principle of intermediate frequency induction heating and finally casting them into alloy rods. During the melting process of GH4097 superalloy master alloy, inert metal elements such as nickel, cobalt, chromium, manganese, niobium, tungsten, molybdenum, zirconium, titanium, and aluminum are generally used. These metal elements with high melting points need to be added to the crucible in the smelting furnace of the superalloy master alloy before the molten steel melts, that is, before evacuating the air and closing the furnace lid. However, due to the limited range and volume of the crucible, the solid metal element raw materials will accumulate above the crucible mouth in the crucible. After closing the furnace lid and starting to evacuate the air and melt the metal raw materials, these metal solid materials will form "bridging" nodules through the "spot welding" method and cannot fall back into the molten steel in the melting crucible by their own gravity, resulting in incomplete melting during the superalloy melting process, wasting metal raw materials and blocking the crucible mouth in the smelting furnace of the superalloy master alloy over time, causing the superalloy melting to be unable to proceed normally. Therefore, a charging device is designed to clean the accumulated raw materials at the crucible mouth of the smelting furnace of the superalloy master alloy and effectively ensure the normal progress of the smelting operation. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a charging and sealing device for a vacuum induction melting furnace of GH4097 superalloy master alloy, which effectively solves the problems of cleaning the accumulated raw materials at the crucible mouth of the smelting furnace of the superalloy master alloy, blocking the crucible mouth in the smelting furnace of the superalloy master alloy, causing waste of raw materials, and the smelting operation being unable to proceed normally.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: A charging and sealing device for a vacuum induction melting furnace of GH4097 superalloy master alloy, characterized in that: the ramming rod is a hollow tube, a plug is arranged at the upper end of the ramming rod, a plug wire is arranged at the lower end of the ramming rod, an inlet pipe is connected to the top of the plug, an outlet pipe is connected to the side of the plug, and a charging head is connected to the plug wire by a threaded manner.

[0005] Preferably, a sealing bellows is movably connected to the outer wall of the pouring rod. Sealing flanges and fixed flanges are respectively provided at the upper and lower ends of the sealing bellows. A hole is provided on the sealing flange, and the size of the hole matches that of the pouring rod. A plurality of layers of skeleton sealing rings and a plurality of layers of graphite packing are arranged inside the hole on the sealing flange. The graphite packing and the skeleton sealing rings are arranged alternately. An end cover is arranged on the hole of the sealing flange, a setscrew is arranged on the side surface of the end cover, and the end cover is connected to the sealing flange by bolts; the lower end of the fixed flange is connected to a sealing fixing table by bolts, and the sealing fixing table is installed on the furnace cover.

[0006] Preferably, the pouring rod penetrates through the end cover and extends tightly into the inner cavity of the sealing fixing table against the sealing flange.

[0007] The beneficial effects of the present invention are as follows: The present invention provides a pouring sealing device for a vacuum induction melting furnace of GH4097 superalloy. The pouring sealing device is installed on the furnace cover of the smelting furnace of the superalloy. By operating the pouring rod, the pouring head causes the nodular metal solid materials accumulated at the crucible opening in the smelting furnace of the superalloy to fall back into the crucible in the form of "bridging" and continue to be melted, effectively solving the problem of accumulation and blockage at the crucible opening in the smelting furnace of the superalloy and improving the melting efficiency.

[0008] The present invention provides a pouring sealing device for a vacuum induction melting furnace of GH4097 superalloy. By introducing flowing air into the air inlet pipe and the air outlet pipe, the temperature of the pouring rod and the pouring head is reduced during pouring, avoiding scalding the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 FIG. is a schematic structural diagram of a pouring sealing device for a vacuum induction melting furnace of GH4097 superalloy according to the present invention.

[0010] Figure 2 FIG. is a partial schematic structural diagram of a pouring sealing device for a vacuum induction melting furnace of GH4097 superalloy according to the present invention.

[0011] In the figure: 1. Sealing bellows; 11. Sealing flange; 12. Fixed flange; 13. Skeleton sealing ring; 14. Graphite packing; 15. End cover; 16. Bolt; 17. Setscrew; 2. Sealing fixing table; 3. Ramming rod; 31. Plug; 32. Plug wire; 33. Pouring head; 34. Air inlet pipe; 35. Air outlet pipe. DETAILED DESCRIPTION OF THE INVENTION

[0012] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0013] As Figure 1 and Figure 2 shown, a charging and sealing device for a vacuum induction melting furnace of GH4097 superalloy master alloy. The ramming rod 3 is a hollow tube. A plug 31 is provided at the upper end of the ramming rod 3, and a plug wire 32 is provided at the lower end of the ramming rod 3. An air inlet pipe 34 is connected to the top of the plug 31, and an air outlet pipe 35 is connected to the side of the plug 31. By introducing flowing air through the air inlet pipe 34 and the air outlet pipe 35, the temperature of the charging device can be effectively reduced. The plug wire 32 is connected to a charging head 33 by a threaded method, which facilitates the removal of the charging head 33 from the plug wire 32, and the metal residues attached to the charging head 33 are cleaned regularly. A sealing bellows 1 is connected to the ramming rod 3. Sealing flanges 11 and fixed flanges 12 are respectively provided at the upper and lower ends of the sealing bellows 1. A hole matching the size of the ramming rod 3 is provided on the sealing flange 11. Several layers of skeleton sealing rings 13 and several layers of graphite packing 14 are arranged inside the hole. The skeleton sealing rings 13 and several layers of graphite packing 14 are arranged alternately. A end cover 15 is provided at the top of the hole on the sealing flange 11. The end cover 15 is connected to the sealing flange 11 by bolts 16, ensuring that there is no air leakage in the blast furnace when the ramming rod 3 interacts with the sealing flange 11. A setscrew 17 is provided on the side of the end cover 15, and the position of the ramming rod 3 can be controlled by operating the setscrew 17; The lower end of the fixed flange 12 is connected to a sealing fixing table 2 by bolts. The sealing fixing table 2 is arranged on the furnace cover of the melting furnace. The ramming rod 3 and the charging head 33 penetrate through the end cover 15 and extend into the inner cavity of the sealing fixing table 2 closely against the inner wall of the hole of the sealing flange 11. The charging head 33 is located above the furnace cover opening of the melting furnace.

[0014] When using this device, when the operator lowers or extracts the ramming rod 3, the ramming rod 3 moves on the sealing flange 11. Since the inner wall of the hole on the sealing flange 11 matching the ramming rod 3 is provided with skeleton sealing rings 13 and graphite packing 14, and the end cover 15 is fixedly arranged by bolts 16 after the ramming rod 3 is installed, during the charging operation, the vacuum furnace can better maintain the vacuum state and there will be no air leakage in the superalloy melting furnace; Before starting the smelting furnace of the superalloy at high temperature, install and adjust the charging sealing device of the vacuum induction melting furnace for GH4097 superalloy of the present invention. Before starting the smelting operation, connect the inlet pipe 34 to an external gas source through a hose, and connect the outlet pipe 35 to an exhaust pipe through a hose. Pass flowing air into the inlet pipe 34 of the charging rod 3. The inlet pipe 34 extends to the bottom of the charging rod 3. The flowing air enters the hollow inner cavity of the charging rod 3, which can reduce the temperature of the charging rod 3 and the charging head 33. The flowing air is discharged from the outlet pipe 35, effectively preventing the operator from being scalded during use. Loosen the setscrew 17 and lower the charging rod 3 and the charging head 33 as a whole, and adjust them to a suitable position. After the smelting operation starts, the position of the charging rod 3 can be adjusted to align the charging head 33 with the bridging and caking part of the metal raw material stack at the crucible mouth, and regularly perform the charging operation on the materials at the crucible mouth inside the smelting furnace of the superalloy at high temperature, so as to avoid the bridging and caking of the metal raw materials stacked at the crucible mouth and affect the normal progress of the high-temperature smelting operation; After use, the charging rod 3 and the charging head 33 can be pulled out above the high-temperature furnace cover, remove the hoses connected to the inlet pipe 34 and the outlet pipe 35, and then fix the charging rod 3 in a suitable position by tightening the setscrew 17. If necessary, the sealing fixing table 2 can be removed from the high-temperature furnace cover, and the whole charging device can be taken away from the high-temperature furnace cover.

[0015] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A material pouring sealing device for a GH4097 high temperature master alloy vacuum induction melting furnace, comprising a material pouring rod, characterized in that: The ramming rod (3) is a hollow tube, the upper end of the ramming rod (3) is provided with a plug (31), the lower end of the ramming rod (3) is provided with a plugging wire (32), the top of the plugging rod (31) is connected to an air inlet pipe (34), the side of the plugging rod (31) is connected to an air outlet pipe (35), and the plugging wire (32) is connected to a pouring head (33).

2. The material pouring sealing device for a GH4097 high temperature master alloy vacuum induction melting furnace according to claim 1 is characterized in that: A sealing bellows (1) is movably connected to the outer wall of the pouring rod (3), and a sealing flange (11) and a fixing flange (12) are respectively provided at the upper and lower ends of the sealing bellows (1). A hole is provided on the sealing flange (11), and the hole matches the size of the pouring rod (3). A plurality of layers of skeleton sealing rings (13) and a plurality of layers of graphite packings (14) are arranged inside the hole on the sealing flange (11), and the graphite packings (14) and the skeleton sealing rings (13) are arranged alternately. An end cover (15) is provided on the hole of the sealing flange (11), and a top screw (17) is provided on the side of the end cover (15). The end cover (15) is connected to the sealing flange (11) by bolts (16); the lower end of the fixing flange (12) is connected to a sealing fixing platform (2) by bolts, and the sealing fixing platform (2) is installed on the furnace cover.

3. The material pouring sealing device for a GH4097 high temperature master alloy vacuum induction melting furnace according to claim 1 is characterized in that: The pouring rod (3) passes through the end cover (15) and extends into the inner cavity of the sealing fixing platform (2) in close contact with the sealing flange (11).

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