Aluminum alloy magnesium melting device

Abstract

The utility model relates to the technical field of aluminum alloy melt composition control devices, and discloses an aluminum alloy magnesium melting device which is composed of a plate body and a mesh cage fixed on the plate body, a magnesium ingot feeding hole is formed in the plate body, and the mesh cage is arranged corresponding to the magnesium ingot feeding hole and used for loading magnesium ingots fed from the magnesium ingot feeding hole; the end, away from the magnesium ingot feeding hole, of the mesh cage is of an opening structure, and the size of the opening structure is not smaller than that of the magnesium ingot feeding hole. The aluminum alloy magnesium melting device provided by the utility model is specially arranged on a converter launder of a molten aluminum smelting furnace to a holding furnace for use, the traditional magnesium ingot alloying feeding mode is improved, under the condition of the existing flat direct current launder, the small and convenient magnesium melting device is designed, magnesium ingots are added in the launder, and the magnesium ingots are quickly melted after being in contact with molten aluminum, so that the molten aluminum can be quickly melted; and the magnesium enters below the liquid level of the heat preservation furnace along with rolling of the aluminum liquid, the magnesium melting speed is increased, magnesium metal burning loss is reduced, and the batching accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy melt composition control devices, in particular to an aluminum alloy magnesium melting device. Background Art

[0002] 6 series aluminum alloy is a heat-treatment-strengthened alloy with excellent formability, weldability, and machinability. It also has medium strength and is suitable for applications with high requirements for corrosion resistance and oxidation resistance. It is widely used in aerospace, construction, automobiles and other fields. The main elements of 6 series aluminum alloy are magnesium and silicon. During the production process, the aluminum ingots need to be charged into the furnace for melting, and then transferred to the holding furnace after melting into liquid state for the next step of refining and alloying. During alloying, the magnesium ingot is put into the aluminum liquid. Since the density of magnesium is smaller than that of aluminum, the magnesium ingot will float on the surface of the aluminum liquid, resulting in a very high burnout rate of magnesium metal. In order to reduce the burnout, the traditional method is to use a magnesium cage or bell jar to press the magnesium ingot into the aluminum liquid. Due to the large size of the magnesium cage or bell jar, a forklift is required for operation, the melting time is long, the production efficiency is slow, and the forklift is inconvenient to operate when the production site is small, and it is easy to damage the equipment. Therefore, it is of great practical significance to design a small and convenient magnesium melting device to speed up the melting speed of magnesium and reduce the oxidation and burnout of magnesium.

[0003] At present, the existing aluminum alloy smelting furnace trough is usually a flat straight flow trough. If magnesium is added directly into the flat straight flow trough, the aluminum liquid will have a weak flushing force, which is not conducive to the dissolution and diffusion of magnesium, and even causes a safety hazard of aluminum liquid flow being blocked and overflowing from the trough. The flat straight flow trough is transformed into a magnesium addition trough according to the patent "CN202119269U A magnesium addition trough for aluminum alloy smelting furnace", but there are problems such as inconsistent production process conditions, difficulty in transformation of the inclined flow trough, and high investment cost. Summary of the invention

[0004] The purpose of the utility model is to provide a device capable of directly adding magnesium into an existing flat and direct current trough, so as to at least provide a beneficial choice or create conditions for solving one or more technical problems in the prior art.

[0005] To achieve the above objectives, the utility model adopts the following technical solutions.

[0006] An aluminum alloy magnesium melting device consists of a plate body and a grid cage fixed on the plate body, wherein a magnesium ingot feeding hole is opened on the plate body, and the grid cage is arranged corresponding to the magnesium ingot feeding hole and is used to load the magnesium ingot fed from the magnesium ingot feeding hole; one end of the grid cage away from the magnesium ingot feeding hole is an open structure, and the size of the opening structure is not less than the size of the magnesium ingot feeding hole.

[0007] More preferably, the plate body is a steel plate, the mesh cage is a steel cage, and the steel cage and the steel plate are welded and fixed.

[0008] More preferably, the steel cage is welded from steel bars with a diameter of 3-10 mm.

[0009] More preferably, the magnesium ingot feeding hole is located in the middle of the plate body; in the fluid flow direction, the maximum width of the magnesium ingot feeding hole does not exceed half of the maximum width of the plate body.

[0010] More preferably, the magnesium ingot feeding hole and the plate body have the same shape, which are both square, circular or elliptical.

[0011] More preferably, the magnesium ingot feeding hole and the plate body have different shapes.

[0012] More preferably, the plate body is provided with mounting holes for mounting and fixing with the converter flow channel.

[0013] More preferably, the plate body and the converter launder are fixed by locking screws.

[0014] More preferably, the grid cage faces the inner side of the converter flow channel, and the lowest point of the grid cage is higher than the fluid plane of the converter flow channel.

[0015] The utility model has at least the following beneficial effects.

[0016] 1. The aluminum alloy magnesium melting device provided by the utility model is specially installed on the converter launder of the aluminum liquid smelting furnace to the holding furnace for use, and improves the traditional magnesium ingot alloying feeding method. Under the existing flat straight flow trough conditions, a compact and convenient magnesium melting device is designed. The magnesium ingot is added in the launder, and the magnesium ingot melts rapidly after contacting the aluminum liquid, and rolls into the liquid surface of the holding furnace with the aluminum liquid, thereby accelerating the melting speed of magnesium, reducing the burning loss of magnesium metal, and improving the accuracy of the batching.

[0017] 2. The aluminum alloy magnesium melting device of the utility model is simple to operate and convenient to take. According to the measured results, 4 magnesium ingots can be added per minute. Compared with the traditional forklift magnesium cage adding magnesium ingots, it can improve production efficiency and is convenient and fast. There is no need to modify the converter flow channel, and it can be used directly in the flat flow channel, with low investment cost. The magnesium ingot is completely dissolved in the flow channel and diffused evenly after entering the holding furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic structural diagram of the aluminum alloy magnesium melting device provided by the utility model.

[0019] Figure 2 Shown is an application schematic diagram of the aluminum alloy magnesium melting device provided by the utility model.

[0020] Description of Figure Numbers.

[0021] 1: Plate body, 2: Grid cage, 3: Magnesium ingot feeding hole, 4: Converter launder, 5: Magnesium ingot. DETAILED DESCRIPTION

[0022] The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, and cannot be understood as limiting the utility model.

[0023] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention.

[0024] Reference Figure 1 As shown, an aluminum alloy magnesium melting device is composed of a plate body 1 and a mesh cage 2 fixed on the plate body 1, a magnesium ingot feeding hole 3 is opened on the plate body 1, the mesh cage 2 is arranged corresponding to the magnesium ingot feeding hole 3, and is used for loading the magnesium ingot fed from the magnesium ingot feeding hole 3, and one end of the mesh cage 2 away from the magnesium ingot feeding hole 3 is an open structure, and the size of the opening structure is not less than the size of the magnesium ingot feeding hole 3, so that the fed magnesium ingot can flow out smoothly from the opening structure.

[0025] In this embodiment, the plate body 1 is preferably a steel plate, and the mesh cage 2 is preferably a steel cage, and the steel cage and the steel plate are welded and fixed. The steel cage is preferably welded by steel bars with a diameter of 5 mm. Obviously, those skilled in the art can choose other materials that are currently known or can be realized in the future to make the plate body and the mesh cage according to different actual needs, as long as both will not melt due to the high temperature of the aluminum liquid.

[0026] In this embodiment, the thickness of the steel plate is preferably 10 mm, the length is 500 mm, and the width is 250 mm. In some embodiments, the size of the steel plate can be adjusted according to the actual situation of the production line, as long as the length is greater than the width of the flow channel. A 180*110 mm square hole is opened in the middle of the steel plate, and the 250 mm steel plate width can prevent aluminum liquid from splashing.

[0027] It should be noted that the common specifications of magnesium ingots are 590 mm long, 140 mm wide and 76 mm high, and the square hole in the middle of the steel plate can ensure that the magnesium ingot can be easily put in without causing jamming. Therefore, the size of the square hole in the middle of the steel plate is determined according to the specifications of the magnesium ingots used in production, and is not limited to this embodiment.

[0028] It should be noted that the shapes of the plate body 1 and the magnesium ingot feeding hole 3 are not limited to the square shape exemplified above, and may also be circular, elliptical, and combinations thereof. When the shape and size of the magnesium ingot feeding hole 3 change, as long as the magnesium ingot feeding hole is located in the middle of the plate body and in the direction of fluid flow, and the maximum width of the magnesium ingot feeding hole does not exceed half of the maximum width of the plate body, a better technical effect of preventing aluminum liquid from splashing is still achieved.

[0029] Combination Figure 2 As shown, the aluminum alloy magnesium melting device is specially suitable for the converter launder 4 of the aluminum liquid smelting furnace to the insulation furnace. During the aluminum liquid conversion process, the steel cage of the aluminum alloy magnesium melting device is placed downward on the converter launder 4 in front of the insulation furnace, and the steel plate is fixed by the locking screws (not shown) on the launder panel. After the aluminum liquid flows out, the magnesium ingot 5 is placed in the middle square hole. The magnesium ingot 5 melts rapidly after contacting the aluminum liquid, and rolls into the insulation furnace below the liquid surface with the aluminum liquid. In some embodiments, the height of the steel cage is equal to the distance from the launder plane to the aluminum liquid level, and the steel bar is not immersed in the aluminum liquid to increase the service life of the product. Example

[0030] In the process of producing 6061 alloy, the aluminum ingot is first melted in a smelting furnace. After the aluminum liquid is heated to 750°C, the converter is started. The above-mentioned aluminum alloy magnesium melting device is placed on the converter flow channel of the smelting furnace and the holding furnace, with the steel cage facing downward and the steel plate fixed with locking screws. After the aluminum liquid flows out, the magnesium ingot is put into the square hole. After the magnesium ingot contacts with the aluminum liquid, it quickly melts and enters the holding furnace. The amount of addition is determined according to the calculation results.

[0031] In this embodiment, the actual addition amount is 80 kg, the melting time is 3 min, and the composition of the aluminum liquid in the holding furnace is sampled and tested after alloying. The theoretical composition Mg=0.808%, the actual tested composition Mg=0.797%, the burn-out amount is 2.75 kg, and the burn-out rate is 3.44%.

[0032] Compared with adding magnesium ingots directly into the flow chute, the burning rate of magnesium ingots in this embodiment is reduced by about 1.56%; compared with adding magnesium ingots by using a forklift to operate the magnesium cage, the operation time is increased by about 17 minutes.

[0033] It should also be noted that, in the description of the present invention, directional words such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, "at least" means one or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise specified and limited, the terms "assembly", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the utility model, unless otherwise specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "below" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the height of the second feature. A first feature being "above", "below" and "below" a second feature includes that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the second feature.

[0037] Through the description of the above structure and principle, those skilled in the art should understand that the present invention is not limited to the above specific implementations. Improvements and substitutions based on the present invention using the known technology in the art fall within the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims and their equivalents. Parts not described in the specific implementations are prior art or common knowledge.

Claims

1. An aluminum alloy magnesium melting device, characterized in that: It consists of a plate body and a grid cage fixed on the plate body, wherein a magnesium ingot feeding hole is opened on the plate body, and the grid cage is arranged corresponding to the magnesium ingot feeding hole and is used for loading the magnesium ingot fed from the magnesium ingot feeding hole; one end of the grid cage away from the magnesium ingot feeding hole is an open structure, and the size of the opening structure is not less than the size of the magnesium ingot feeding hole.

2. The aluminum alloy magnesium melting device according to claim 1, characterized in that: The plate body is a steel plate, the grid cage is a steel cage, and the steel cage and the steel plate are welded and fixed.

3. The aluminum alloy magnesium melting device according to claim 2, characterized in that: The steel cage is welded from steel bars with a diameter of 3-10 mm.

4. An aluminum alloy magnesium melting device according to claim 1 or 2, characterized in that: The magnesium ingot feeding hole is located in the middle of the plate body; in the fluid flow direction, the maximum width of the magnesium ingot feeding hole does not exceed half of the maximum width of the plate body.

5. An aluminum alloy magnesium melting device according to claim 1 or 2, characterized in that: The magnesium ingot feeding hole and the plate body have the same shape, which are square, circular or elliptical.

6. An aluminum alloy magnesium melting device according to claim 1 or 2, characterized in that: The magnesium ingot feeding hole and the plate body have inconsistent shapes.

7. The aluminum alloy magnesium melting device according to claim 1, characterized in that: The plate body is provided with mounting and fixing holes for realizing mounting and fixing with the converter flow channel.

8. The aluminum alloy magnesium melting device according to claim 7, characterized in that: The plate body and the converter flow channel are fixedly mounted by locking screws.

9. The aluminum alloy magnesium melting device according to claim 7, characterized in that: The grid cage faces the inner side of the converter flow channel, and the lowest point of the grid cage is higher than the fluid plane of the converter flow channel.

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