Alloy smelting device

Abstract

The utility model relates to the technical field of non-ferrous metal smelting, in particular to an alloy smelting device. The utility model provides an alloy smelting device. The alloy smelting device comprises a smelting furnace, a hollow stirring paddle, a continuous casting furnace, a movable piston and a guide rod, the smelting furnace is connected with the continuous casting furnace; an air inlet and an air outlet are formed in the smelting furnace; the hollow stirring paddle is connected with an air inlet of the smelting furnace in a dynamic sealing manner, and the hollow stirring paddle extends into the smelting furnace; the movable piston is located in the continuous casting furnace and used for extruding melt in the continuous casting furnace. The guide rod extends into the continuous casting furnace through a continuous casting opening of the continuous casting furnace. The alloy smelting device solves the problem that non-metallic inclusions such as oxygen and sulfur are difficult to completely remove during alloy smelting, and alloy products with high cleanliness and high performance can be obtained.

Description

TECHNICAL FIELD

[0001] The utility model relates to non ferrous metal smelting technical field, specifically, relate to an alloy smelting device. BACKGROUND

[0002] During alloy smelting, the existence of nonmetallic inclusions such as oxygen and sulfur is a common and difficult-to-avoid problem. These nonmetallic inclusions mainly come from raw materials, smelting processes, and equipment, etc. They have a serious impact on the mechanical properties, physical properties, and corrosion resistance of the alloy.

[0003] During the smelting process, the alloy absorbs a large amount of oxygen. Although some of the dissolved oxygen is released when the alloy solidifies, there is still some residual oxygen, which causes defects such as micro pores and porosity in the castings. These defects not only affect the appearance of the alloy, but more importantly, they weaken the overall performance of the alloy, causing a significant decrease in the mechanical properties of the alloy such as strength, plasticity, hardness, and impact toughness. In addition, oxygen also causes a large amount of beneficial elements to be burned off, further damaging the quality of the alloy. Therefore, reducing the oxygen content in the alloy is the key to improving the quality of the alloy. This not only improves the wettability and casting and drawing performance of the alloy, but also promotes the production of high-purity and high-reliability alloys. On the other hand, the alloy is also prone to react with sulfur during the smelting process, forming sulfides. These sulfides also have a negative impact on the performance of the alloy, reducing the value of the alloy.

[0004] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0005] The utility model aims at providing an alloy smelting device, which solves the problem of removing nonmetallic inclusions such as oxygen and sulfur during alloy smelting, and can obtain high-purity and high-performance alloy products.

[0006] In order to achieve the above-mentioned purpose of the utility model, the following technical scheme is adopted:

[0007] The utility model provides an alloy smelting device, which comprises a smelting furnace, a hollow stirring paddle, a continuous casting furnace, a moving piston, and a guide rod.

[0008] The smelting furnace is connected to the continuous casting furnace.

[0009] An air inlet and an air outlet are arranged on the smelting furnace.

[0010] The hollow stirring paddle is connected to the air inlet of the smelting furnace by dynamic sealing, and the hollow stirring paddle extends into the smelting furnace.

[0011] The moving piston is located in the continuous casting furnace and is used to extrude the melt in the continuous casting furnace.

[0012] The guide rod extends into the continuous casting furnace through a continuous casting opening of the continuous casting furnace.

[0013] Further, the hollow stirring paddle comprises a hollow stirring rod and a paddle blade, one end of the hollow stirring rod being connected with the paddle blade.

[0014] Further, the top of the furnace body of the smelting furnace is provided with a feeding opening.

[0015] Further, the alloy smelting device comprises a flow-stopping valve, which is located at the side where the smelting furnace is communicated with the continuous casting furnace.

[0016] Further, the alloy smelting device comprises a feeding pipe, which is connected with the feeding opening of the smelting furnace and extends into the smelting furnace.

[0017] Further, the feeding opening is located at the top of the furnace body of the smelting furnace.

[0018] Further, the gas inlet is located at the top of the furnace body of the smelting furnace.

[0019] Further, the gas outlet is located at the top of the furnace body of the smelting furnace.

[0020] Further, the bottom of the side of the furnace body of the smelting furnace is provided with a slag outlet.

[0021] Further, the vertical distance between the flow-stopping valve and the bottom of the furnace body of the smelting furnace is the same as the thickness of the molten slag in the smelting furnace.

[0022] Further, the maximum moving distance of the moving piston is the vertical distance between the flow-stopping valve and the top of the continuous casting furnace.

[0023] Compared with the prior art, the alloy smelting device has the following beneficial effects:

[0024] The alloy smelting device provided by the utility model can transport the mixed gas of the reducing gas and the inert gas from the gas inlet into the molten body in the smelting furnace and stir the molten body, so that the double mechanical stirring of the molten body is realized, the reducing gas in the mixed gas reacts with the non-metallic inclusions, such as oxygen and sulfur, in the molten body, the non-metallic inclusions in the molten body are removed, and the alloy molten body with high cleanliness and high performance is obtained; the smelting furnace is separated from the continuous casting furnace, the moving piston is arranged in the continuous casting furnace, the efficient and stable downward guiding of the molten body in the continuous casting process is ensured, and the alloy casting rod with good surface quality is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 The structure diagram of the alloy smelting device of the present application.

[0027] Reference signs:

[0028] 1-smelting furnace; 11-gas inlet;

[0029] 12-feeding port; 13-gas outlet;

[0030] 14-tapping hole; 2-hollow stirring paddle;

[0031] 3-non-return valve; 4-continuous casting furnace;

[0032] 41-continuous casting port; 5-moving piston;

[0033] 6-lead rod. DETAILED DESCRIPTION

[0034] The technical solutions of the present application will be described clearly and completely in combination with the drawings and specific embodiments, but those skilled in the art will understand that the following described embodiments are part of the embodiments of the present application, not all the embodiments, and are only used to illustrate the present application, and should not be regarded as limiting the scope of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. The specific conditions not mentioned in the embodiments are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not marked with the manufacturer, which are conventional products that can be purchased in the market.

[0035] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The following will be described with reference to Figure 1The alloy smelting device provided by some embodiments of the utility model, comprising: smelting furnace 1, hollow stirring paddle 2, continuous casting furnace 4, moving piston 5 and guide rod 6,

[0037] The smelting furnace 1 is connected with the continuous casting furnace 4.

[0038] The smelting furnace 1 is provided with air inlet 11 and air outlet 13.

[0039] The hollow stirring paddle 2 is connected with the air inlet 11 of the smelting furnace 1 by dynamic sealing, and the hollow stirring paddle 2 extends into the smelting furnace 1.

[0040] The moving piston 5 is located in the continuous casting furnace 4 and is used for extruding the melt in the continuous casting furnace 4.

[0041] The guide rod 6 extends into the continuous casting furnace 4 through the continuous casting opening 41 of the continuous casting furnace 4.

[0042] In the embodiments of the utility model, the hollow stirring paddle 2 is used for conveying the mixed gas from the air inlet 11 to the bottom of the molten pool in the smelting furnace 1; preferably, the mixed gas comprises reducing gas and inert gas.

[0043] The reducing gas comprises any one of hydrogen, carbon monoxide and hydrocarbon gas; more preferably, the hydrocarbon gas comprises methane.

[0044] The inert gas comprises any one of nitrogen, argon and helium.

[0045] The alloy smelting device of the utility model can convey the mixed gas of reducing gas and inert gas to the bottom of the molten pool in the smelting furnace 1 through the hollow stirring paddle 2, the flowing mixed gas and the rotating hollow stirring paddle 2 spray and stir the melt, which not only can remove the oxygen, sulfur and other elements in the melt, but also can play the role of stirring, accelerating reduction and mixing alloy components, so that the non-metallic inclusions in the melt are removed, and the alloy melt with uniform components and high purity is obtained.

[0046] In the process of alloy smelting, the mixed gas of reducing gas and inert gas is conveyed from the air inlet 11, the mixed gas is conveyed to the bottom of the molten pool in the smelting furnace 1 by the hollow stirring paddle 2, and the melt is stirred by the hollow stirring paddle 2, the reducing gas in the mixed gas reacts with the non-metallic inclusions in the melt, the stirring promotes the rapid contact between the reducing gas and the non-metallic inclusions, accelerates the reaction, shortens the reaction time, the reaction products float in the molten pool, and the generated gas products are discharged from the air outlet 13 along with the flow of the mixed gas. After the reaction is completed, the mixed gas is continuously conveyed, and the required alloy raw materials are added from the feeding opening 12 for tempering and smelting, which is beneficial to the full mixing of the alloy raw material components, and forms the alloy melt with uniform components and high purity.

[0047] The alloy melt in the smelting furnace 1 flows into the continuous casting furnace 4 under the suction force generated by the stop valve 3 and the moving piston 5 moving upwards, and the alloy melt can be pressurized by the moving piston 5 moving downwards, so that the alloy melt can be discharged through the continuous casting port 41 and directly subjected to continuous casting, high-efficiency and stable continuous casting is realized, and thus the alloy casting rod with good surface quality is obtained.

[0048] The alloy smelting device utilizes the flowing gas reduction method, the mixed gas is delivered to the bottom of the molten pool and the melt is stirred through the hollow stirring paddle 2, the molten pool can be subjected to double mechanical stirring, the rapid reaction of the non-metallic inclusions (oxygen, sulfur and the like) and the reducing gas can be realized, and the uniform distribution of the alloy elements in the melt can also be realized, and the composition segregation is avoided.

[0049] The whole impurity removal and smelting process in the alloy smelting device is operated under normal pressure, so that the alloy raw materials can be added at any time, and the composition flexible control is ensured.

[0050] The alloy smelting device comprises the smelting furnace 1 and the continuous casting furnace 4, the smelting and continuous casting processes can be carried out separately, the melt can be stably guided downwards during the continuous casting process, and the problem that the casting rod has more pores due to the melt oscillation is avoided.

[0051] Although the vacuum smelting device can have the attraction effect on the oxygen in the alloy, the oxygen removal is not thorough, and the alloy composition is easy to volatilize for the alloy containing the metal component with high vapor pressure, so that the alloy composition is not accurate. Compared with the vacuum smelting device, the alloy smelting device has stronger oxygen removal capacity, can remove other non-metallic inclusions, and has small alloy composition loss.

[0052] In the embodiment of the utility model, the smelting furnace 1 includes an induction smelting furnace.

[0053] In the embodiment of the utility model, the hollow stirring paddle 2 includes a hollow stirring rod and a paddle blade, one end of the hollow stirring rod is connected with the paddle blade, the paddle blade of the hollow stirring paddle 2 is a hollow structure and is located at the bottom of the smelting furnace. The mixed gas enters from the center of the hollow stirring rod and is discharged from the paddle blade, so that the mixed gas is delivered to the melt.

[0054] In the embodiment of the utility model, the hollow stirring rod is connected with the gas inlet 11 of the smelting furnace through a sealing sleeve, and the contact part of the hollow stirring rod and the sealing sleeve can be connected by dynamic sealing connection in the form of setting rubber pads, oil seals and the like.

[0055] The reduction reaction between the reducing gas and the non-metallic inclusions is a chemical process, and the chemical reaction process is generally slow; the hollow stirring paddle 2 can increase the reaction interface and improve the reaction efficiency through the paddle stirring and the gas stirring; the paddle stirring of the hollow stirring paddle 2 can break the bubbles generated by the gas stirring, so that the reaction interface is increased.

[0056] In the embodiment of the utility model, the material of hollow stirring paddle 2 includes graphite.

[0057] In the embodiment of the utility model, alloy smelting device includes stop valve 3, stop valve 3 is located in the side of smelting furnace 1 and continuous casting furnace communication. Alloy melt in smelting furnace 1 flows into continuous casting furnace 4 through stop valve 3.

[0058] The stop valve is a device used to control and regulate fluid flow; when the fluid passes through the stop valve, the valve will be opened by the pressure of the fluid, allowing the fluid to pass through. When the fluid flow needs to be stopped, the valve will be closed by the control of the valve stem, preventing the fluid from passing through. This design allows the stop valve to quickly open or close when needed, thereby achieving precise control of the fluid.

[0059] In the embodiment of the utility model, alloy smelting device includes feeding pipe, feeding pipe and smelting furnace 1's feeding port 12 are connected, and feeding pipe extends into smelting furnace 1.

[0060] In the embodiment of the utility model, feeding port 12 is located at the top of the furnace body of smelting furnace 1.

[0061] Feeding port 12 can be located at any position on the top of the furnace body of smelting furnace 1, including the central outlet 13, and the feeding pipe connected to the feeding port 12 extends to the bottom of the smelting furnace 1.

[0062] In the embodiment of the utility model, the gas inlet 11 is located at the top of the furnace body of smelting furnace 1.

[0063] In the embodiment of the utility model, the gas outlet 13 is located at the top of the furnace body of smelting furnace 1.

[0064] In the embodiment of the utility model, the furnace body side bottom of smelting furnace 1 is provided with a slag outlet 14.

[0065] The slag outlet 14 is located at the bottom of the side of the furnace body of smelting furnace 1, so that the slag can be removed from the slag outlet when the continuous casting is completed.

[0066] In the embodiment of the utility model, the vertical distance between the stop valve 3 and the bottom of the furnace body of smelting furnace 1 is the same as the thickness of the molten slag in smelting furnace 1.

[0067] The stop valve 3 is located at a distance H from the bottom of the smelting furnace 1 on the side of the furnace body, and the distance H is determined according to the height of the slag layer in the molten pool, and the height of the slag layer is equal to the height of the stop valve 3.

[0068] In the embodiment of the utility model, the maximum moving distance of the moving piston 5 is the vertical distance between the stop valve 3 and the top of the continuous casting furnace 4.

[0069] The upward movement of the moving piston 5 generates suction force, which can make the melt in the smelting furnace 1 enter the continuous casting furnace 4 under the action of the suction force through the stop valve 3; the downward movement of the moving piston 5 generates pressure, which can pressurize the melt, and the melt can be discharged through the continuous casting opening 41; the movement of the moving piston 5 can move between the position in the continuous casting furnace corresponding to the stop valve 3 and the top of the continuous casting furnace 4.

[0070] The alloy smelting device is used for smelting, and the specific steps include the following steps:

[0071] The alloy raw materials are completely melted in the smelting furnace, then the mixed gas is continuously introduced from the gas inlet 11, the mixed gas is delivered to the molten pool by the hollow stirring paddle 2 and is stirred and reacted, the reaction products float in the molten pool, and the gas products are discharged from the gas outlet 13 along with the mixed gas;

[0072] After the reaction is completed, the mixed gas is continuously introduced from the gas inlet 11, the mixed gas is delivered to the molten pool by the hollow stirring paddle 2 and is stirred, the remaining alloy raw materials are added through the feeding port 12 according to the alloy element composition to adjust the alloying composition, and after smelting, the alloy melt is obtained;

[0073] The alloy melt flows into the continuous casting furnace 4 under the action of the suction force generated by the upward movement of the moving piston 5 in the continuous casting furnace 4 through the stop valve 3, when the cavity of the continuous casting furnace 4 is filled with the silver alloy melt, the moving piston 5 is moved downward to press the alloy melt and starts the continuous casting process, and the alloy rod is obtained.

[0074] In the embodiment of the utility model, the alloy smelting device is a silver alloy smelting device.

[0075] The high content of S or O in the silver alloy can cause problems in subsequent processing, such as in the preparation of silver alloy bonding wires or silver alloy brazing filler metals, which can cause the silver alloy bonding wire to be prone to breaking during the processing process, reduce the processing efficiency, and be prone to breaking during bonding, thereby reducing the use quality and device reliability; the alloy smelting device provided by the utility model is used for smelting silver alloy, which can realize the continuous preparation of uniform composition and high-purity silver alloy, reduce the oxygen and sulfur content in the silver alloy, and reduce the oxygen content to less than 20ppm, thereby improving the quality of the silver alloy.

[0076] Although the present application has been illustrated and described with reference to specific embodiments, it is realized that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit it; those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified or some or all of the technical features can be replaced equivalently without departing from the spirit and scope of the present application; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application; therefore, this means that all these replacements and modifications within the scope of the present application are included in the appended claims.

Claims

1. An alloy smelting device, characterized in that: include: Melting furnace, hollow stirring paddle, continuous casting furnace, moving piston and guide rod; The smelting furnace is connected to the continuous casting furnace; The smelting furnace is provided with an air inlet and an air outlet; The hollow stirring paddle is connected to the air inlet of the smelting furnace by a dynamic seal, and the hollow stirring paddle extends into the smelting furnace; The movable piston is located in the continuous casting furnace and is used to squeeze the melt in the continuous casting furnace; The guide rod extends into the continuous casting furnace through the continuous casting port of the continuous casting furnace.

2. The alloy melting device according to claim 1, characterized in that: The hollow stirring paddle comprises a hollow stirring rod and a blade, and one end of the hollow stirring rod is connected to the blade.

3. The alloy melting device according to claim 1, characterized in that: The alloy smelting device includes a stop valve, which is located on a side where the smelting furnace is connected to the continuous casting furnace.

4. The alloy melting device according to claim 3, characterized in that: The alloy smelting device comprises a feeding pipe, which is connected to a feeding port of the smelting furnace and extends into the smelting furnace.

5. The alloy melting device according to claim 4, characterized in that: The feeding port is located at the top of the furnace body of the smelting furnace.

6. The alloy melting device according to claim 4, characterized in that: The air inlet is located at the top of the furnace body of the smelting furnace.

7. The alloy melting device according to claim 4, characterized in that: The gas outlet is located at the top of the furnace body of the smelting furnace.

8. The alloy melting device according to claim 4, characterized in that: A slag outlet is provided at the bottom of the side surface of the furnace body of the smelting furnace.

9. The alloy melting device according to claim 8, characterized in that: The vertical distance between the stop valve and the bottom of the furnace body of the smelting furnace is the same as the thickness of the slag in the smelting furnace.

10. The alloy melting device according to claim 9, characterized in that: The maximum moving distance of the movable piston is the vertical distance between the stop valve and the top of the continuous casting furnace.

Images