Gas cooling device for crucible production of intermediate alloy

Abstract

A gas cooling device for intermediate alloy production through a crucible comprises a base, an inert gas bottle and a control cabinet, a door-shaped support is fixed to the upper end of the base, two telescopic rods are arranged on a cross beam at the top of the door-shaped support side by side, and the two telescopic rods penetrate through the cross beam of the door-shaped support to extend to the position below the cross beam. The telescopic ends of the two telescopic rods are fixedly connected with the upper end of the crucible cover; the crucible cover is provided with a gas inlet, the gas inlet is connected with an inert gas bottle through a gas delivery pipe, the gas delivery pipe is provided with an electromagnetic valve for controlling the flow of inert gas, and the telescopic rod and the electromagnetic valve are respectively and electrically connected with the control cabinet. The utility model aims to overcome the defects in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of intermediate alloy cooling technology, and in particular to a gas cooling device for crucible production of intermediate alloys. Background Technology

[0002] The quality of intermediate alloys is related to many factors, among which oxide and nitride films are a major quality defect in most intermediate alloys produced by the aluminothermic process. The main reason is that after the aluminothermic reaction, the molten alloy in the crucible is cooled in an atmospheric environment. When the temperature of the molten pool system drops below the theoretical crystallization temperature, the alloy atoms near the crucible wall begin to nucleate first, and grains begin to grow. Macroscopically, this manifests as the alloy gradually solidifying from the outside in and from the bottom up. After the alloy completely solidifies, the high-temperature alloy ingot radiates heat rapidly in the low-temperature atmospheric environment, causing stress concentration inside the ingot and the appearance of microcracks in multiple locations. As the ingot temperature decreases, these microcracks gradually enlarge. At this point, oxygen and nitrogen in the air come into contact with the high-temperature alloy through the microcracks and react chemically, forming large-area oxide and nitride films, resulting in alloy quality defects.

[0003] Given the above, in order to reduce the area of ​​oxide and nitride films on the ingot, after the aluminothermic reaction is completed, inert gas (argon) is continuously introduced into the crucible at a certain flow rate for a certain period of time, and the crucible opening is covered for protection, so that the argon gas remains in the crucible for a longer period of time. This can effectively reduce the area of ​​oxide and nitride films in the ingot, and significantly reduce the workload of subsequent sandblasting, color sorting, and manual sorting processes. Currently, the above process is completed manually, which has the following hidden dangers and disadvantages:

[0004] 1. The process of manually introducing inert gas (argon) multiple times is cumbersome, and the manual lifting and placing of the crucible cover is labor-intensive;

[0005] 2. After the aluminothermic reaction is completed, the crucible remains at a high temperature for a long time, and the radiation temperature within 2m can reach (800~1000)℃. There is a safety risk in manually introducing inert gas at close range for a long time.

[0006] 3. Inaccurate control of the introduction time, duration, and gas flow rate when manually introducing inert gas (argon) leads to unstable product quality. Utility Model Content

[0007] This invention provides a gas cooling device for crucible production of intermediate alloys, overcoming the shortcomings of existing technologies.

[0008] The utility model adopts the technical scheme: a gas cooling device for intermediate alloy in crucible production, including base, inert gas bottle, control cabinet, the base upper end is fixed with door type support, the door type support top crossbeam is provided with two telescopic rods side by side, two telescopic rods pass through door type support crossbeam and extend to the crossbeam below, and the telescopic end of two telescopic rods is fixedly connected with the upper end of the lid.

[0009] The lid is a graphite lid.

[0010] The telescopic rod is an electric telescopic rod.

[0011] The base's mesa is also fixed with a right-angle limit block, and the right-angle limit block is located at the rear end of the base.

[0012] The gas delivery pipe is composed of a hard pipe and a hose, one end of the hard pipe is provided with an electromagnetic valve, the other end passes through the door type support crossbeam from top to bottom and is fixed on the crossbeam, the inert gas bottle is connected with the electromagnetic valve through the hose, and the gas inlet is connected with the other end of the hard pipe at the bottom of the crossbeam through the hose.

[0013] Compared with the prior art, the utility model has the beneficial effects:

[0014] 1. The utility model can accurately control the time, duration and flow rate of inert gas, and ensure the quality stability of intermediate alloy.

[0015] 2. The utility model avoids the safety risk of manually introducing inert gas into the high-temperature crucible at close range.

[0016] 3. The utility model has the advantages of simple structure, low cost, convenient operation and good practicability. DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0018] The utility model will be described in detail in combination with the drawings and specific embodiments. Figure 1

[0019] ​The utility model provides a gas cooling device for intermediate alloy in crucible production, including base 1, inert gas bottle 3, control cabinet 6, the door type support 2 is fixedly arranged on the upper end of base 1, two telescopic rods 4 are arranged side by side on the top beam of door type support 2, and the telescopic rod 4 extends to the below of beam through door type support 2, and the telescopic end of two telescopic rods 4 is fixedly connected with the upper end of lid 5, the lid 5 is equipped with air inlet 5-1, and air inlet 5-1 is connected with inert gas bottle 3 through gas delivery pipe 7, and the solenoid valve 8 of controlling inert gas flow is arranged on gas delivery pipe 7, and the telescopic rod 4, solenoid valve 8 are electrically connected with control cabinet 6 respectively.

[0020] In an embodiment, the lid 5 is a graphite lid.

[0021] In an embodiment, the telescopic rod 4 is an electric telescopic rod.

[0022] In an embodiment, the base 1 is further fixed with a right-angle limiting block 9 at the upper end, and the right-angle limiting block 9 is located at the rear end of the base 1, so that the cooling frame 11 of the crucible 10 can be quickly positioned, and the work efficiency is improved.

[0023] In an embodiment, the gas delivery pipe 7 is composed of a hard pipe and a soft pipe, one end of the hard pipe is provided with the solenoid valve 8, the other end of the hard pipe passes through the beam of the door type support 2 from top to bottom and is fixed on the beam, the inert gas bottle 3 is connected with the solenoid valve 8 through the soft pipe, and the air inlet 5-1 is connected with the other end of the hard pipe at the bottom of the beam through the soft pipe.

[0024] In specific use, after the intermediate alloy in the crucible 10 is melted, the crucible 10 is placed on the cooling frame 11, the cooling frame 11 with the crucible 10 is transported to the base 1 of the device by a trolley, and the left end and the rear end of the cooling frame 11 are abutted against the inner end of the right-angle limiting block 9 to quickly position the crucible 10, after the cooling frame 11 is placed, the electric telescopic rod 4 is started by the control cabinet 6 to drive the graphite lid 5 to move downward and cover the pot opening of the crucible 10, then the air inlet frequency, air inlet time and air inlet speed are set according to the intermediate alloy cooling process by the control cabinet 6, the solenoid valve 8 is started after the setting is completed, the inert gas (argon) is delivered into the crucible 10 through the gas delivery pipe 7 according to the set process parameters, the alloy liquid in the crucible 10 is cooled under the protection of the inert gas, the contact amount of the alloy micro-crack section with air is reduced, so that the area of the oxidation film and the nitriding film in the alloy is greatly reduced, the content of impurity elements O and N in the alloy ingot is reduced, and the quality of the intermediate alloy is ensured.

[0025] The above embodiments are only preferred embodiments of the utility model, and are not used to limit the implementation scope of the utility model, so that equivalent changes made according to the contents of the utility model claims should be included in the utility model claim scope.

Claims

1. A gas cooling device for intermediate alloy production in crucibles, characterized by: The utility model relates to a kind of inert gas bottle and its control device, including base (1), inert gas bottle (3), operating cabinet (6), the door type support (2) is fixed on the upper end of the base (1), two telescopic rods (4) are arranged side by side on the top beam of the door type support (2), two telescopic rods (4) extend to the beam below by passing through the beam of the door type support (2), and the telescopic end of two telescopic rods (4) is fixedly connected with the upper end of the cover (5);The cover (5) is equipped with gas inlet (5-1), and the gas inlet (5-1) is connected with inert gas bottle (3) by gas delivery pipe (7), and the gas delivery pipe (7) is equipped with electromagnetic valve (8) for controlling inert gas flow, and the telescopic rod (4), electromagnetic valve (8) are electrically connected with operating cabinet (6) respectively.

2. The gas cooling device for intermediate alloy production in a crucible according to claim 1, characterized in that: The cover (5) is a graphite cover.

3. The gas cooling device for intermediate alloy production in a crucible according to claim 1, characterized in that: The telescopic rod (4) is an electric telescopic rod.

4. The gas cooling device for intermediate alloy production in a crucible according to claim 1, characterized by: The base (1) is also fixed with a right-angle limiting block (9) on the table top, and the right-angle limiting block (9) is located at the rear end of the base (1).

5. The gas cooling device for intermediate alloy production in a crucible according to claim 1, characterized in that: The gas delivery pipe (7) is composed of a hard pipe and a hose, one end of the hard pipe is provided with the electromagnetic valve (8), the other end of the hard pipe passes through the beam of the door type support (2) from top to bottom and is fixed on the beam, the inert gas bottle (3) is connected with the electromagnetic valve (8) by the hose, and the gas inlet (5-1) is connected with the other end of the hard pipe at the bottom of the beam by the hose.

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