Online degassing device for molten aluminum alloy

Abstract

The utility model relates to the technical field of metal smelting equipment, in particular to an aluminum alloy liquid online degassing device which comprises a lifting seat, a degassing rotating mechanism, a heat preservation cover and a heat preservation box body, and when the lifting seat drives the heat preservation cover to descend to the top face of the heat preservation box body, a heat-resisting plate is attached to an abutting plate; a plurality of baffles are arranged at the bottom of the heat preservation cover, and the tops of the baffles are wider than the bottoms; the heat preservation box body is provided with a launder with a top opening. The baffle is perpendicular to the flowing direction of liquid in the launder. The top width of the launder corresponds to the top width of the baffle, and the bottom width of the launder is larger than the bottom width of the baffle. A liquid inlet and a liquid outlet are formed in the two ends of the launder, and baffles are correspondingly arranged at the liquid inlet and the liquid outlet. According to the device, the sealing effect on the convection tank during degassing is achieved through the heat-resisting plate of the heat preservation cover, the abutting plate of the heat preservation box body and the baffle, molten aluminum is degassed more thoroughly, and the better heat preservation effect on the molten aluminum in the convection tank is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal smelting equipment, in particular to an online degassing device for aluminum alloy liquid. Background Art

[0002] After the aluminum liquid is smelted in the furnace, it is poured into the mold through the launder to form an aluminum ingot. The aluminum liquid discharged from the furnace needs to be degassed and purified. This step is usually completed in the launder using a degasser. The rotor of the degasser extends into the aluminum liquid in the launder. The inert gas blown into the aluminum liquid is dispersed through the rotation of the rotor. The bubbles of the inert gas absorb the hydrogen in the aluminum liquid, achieving the effect of purifying the aluminum liquid.

[0003] In the prior art, a degasser is usually provided with an insulation cover. During the degassing process, the insulation cover is located on the flow channel to block the heat loss of the aluminum liquid in the flow channel, but the flow channel cannot be sealed. The inert gas bubbles stay in the aluminum liquid for a short time and will quickly diffuse out of the aluminum liquid. It is difficult to fully remove the hydrogen and other impurities in the aluminum liquid from the aluminum liquid, thus affecting the degassing effect of the aluminum liquid. Utility Model Content

[0004] The purpose of the utility model is to propose an online degassing device for aluminum alloy liquid, which uses the heat-resistant plate of the insulation cover, the abutment plate of the insulation box and the baffle plate to achieve the sealing effect of the convection groove during degassing, degas the aluminum liquid more thoroughly, and achieve a better insulation effect for the aluminum liquid in the convection groove.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An online degassing device for aluminum alloy liquid comprises a lifting seat, a degassing rotating mechanism, a heat preservation cover and a heat preservation box, wherein the heat preservation cover is arranged at the bottom of the lifting seat, the degassing rotating mechanism is installed on the lifting seat and passes through the heat preservation cover, and the heat preservation box is located below the heat preservation cover;

[0007] The bottom edge of the heat preservation cover is provided with a heat-resistant plate, and the top surface of the heat preservation box is provided with a supporting plate. When the lifting seat drives the heat preservation cover to descend to the top surface of the heat preservation box, the heat-resistant plate fits against the supporting plate.

[0008] The bottom of the heat preservation cover is provided with a plurality of baffles, the top width of the baffles being greater than the bottom width; the heat preservation box body has a flow channel with an opening at the top, the baffles are perpendicular to the flow direction of the liquid in the flow channel; the top width of the flow channel corresponds to the top width of the baffles, and the bottom width of the flow channel is greater than the bottom width of the baffles;

[0009] A liquid inlet and a liquid outlet are arranged at both ends of the flow channel, and the baffles are corresponding to the liquid inlet and the liquid outlet.

[0010] Furthermore, the widths of the liquid inlet and the liquid outlet are both smaller than the width of the baffle.

[0011] Furthermore, the thermal insulation box body includes an outer shell and an inner shell, the inner shell is located inside the outer shell, a thermal insulation space is formed between the inner shell and the outer shell, the thermal insulation space is filled with thermal insulation material, and a refractory material layer is provided on the inner wall of the inner shell.

[0012] Furthermore, the abutment plate is connected to the outer shell and the top surface of the thermal insulation material by screws.

[0013] Furthermore, the inner liner is folded outward at the liquid inlet and the liquid outlet to be connected to the outer shell, and docking grooves are formed at the liquid inlet and the liquid outlet.

[0014] Furthermore, the surfaces of the heat-resistant plate and the abutting plate are both frosted surfaces.

[0015] Furthermore, a connecting tube is provided on the top of the heat-insulating cover, and a spring is provided in the connecting tube;

[0016] The lifting seat is provided with a connecting rod, the bottom end of the connecting rod is limited in the connecting tube and slidingly matched with the connecting tube, and the bottom end of the connecting rod is against the spring.

[0017] Furthermore, three baffles are arranged at the bottom of the heat-insulating cover, and a plurality of degassing rotating mechanisms are arranged between two adjacent baffles.

[0018] Further, the degassing rotation mechanism includes a driving motor, a rotating shaft, a graphite shaft and a graphite rotor;

[0019] The driving motor is installed on the lifting seat, the output end of the driving motor is connected to the top end of the rotating shaft, the bottom end of the rotating shaft is connected to the top end of the graphite shaft, and the graphite rotor is arranged at the bottom end of the graphite shaft; the rotating shaft, the graphite shaft and the graphite rotor are provided with air passages;

[0020] A sealing sleeve is arranged between the heat-insulating cover and the graphite shaft.

[0021] Furthermore, the graphite rotor is cylindrical, and the air passage is located at the center of the top of the graphite rotor;

[0022] A plurality of grooves are distributed centripetally at the bottom of the graphite rotor, the first end opening of the groove is located at the outer peripheral wall of the graphite rotor, and the second end of the groove is connected to the air channel through an air hole;

[0023] The top surface and the bottom surface of the graphite rotor are both plane and parallel to each other.

[0024] The technical solution provided by the utility model may have the following beneficial effects:

[0025] In this technical solution, by providing the heat-resistant plate of the insulation cover and the abutment plate of the insulation box, a seal is formed at the front and rear edges of the insulation box during degassing, and the baffle at the bottom of the insulation cover is used to block the liquid inlet and outlet at both ends of the convection groove. When the insulation cover and the insulation box are against each other, a relatively sealed space is formed between the two, which effectively prevents the rapid diffusion of inert gas, increases the contact time between the inert gas and the aluminum liquid, and improves the purification effect of the aluminum liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an online degassing device for aluminum alloy liquid according to an embodiment of the utility model;

[0027] Figure 2 It is a schematic diagram of the coordination between the degassing rotating mechanism and the heat preservation box;

[0028] Figure 3 It is a schematic diagram of the cooperation between the thermal insulation cover and the thermal insulation box;

[0029] Figure 4 It is a schematic diagram of the coordination between the baffle and the thermal insulation box;

[0030] Figure 5 It is a schematic diagram of the structure of a graphite rotor;

[0031] Among them, the lifting seat 1, the connecting rod 11;

[0032] Degassing rotating mechanism 2, driving motor 21, rotating shaft 22, graphite shaft 23, graphite rotor 24, air channel 241, groove 242, air hole 243;

[0033] Insulation cover 3, heat-resistant plate 31, baffle 32, connecting tube 33, spring 34, sealing sleeve 35;

[0034] The heat-insulating box body 4 , the abutting plate 41 , the flow channel 42 , the liquid inlet 43 , the liquid outlet 44 , the outer shell 45 , the inner liner 46 , the heat-insulating space 47 , the refractory material layer 48 , and the docking notch 49 . DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations 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 therefore should not be understood as a limitation on the present invention.

[0037] In the description of the present utility model, unless otherwise specified, “several” means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "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 be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Combine the following Figures 1 to 5 , describing an online degassing device for aluminum alloy liquid according to an embodiment of the utility model.

[0040] An online degassing device for aluminum alloy liquid comprises a lifting seat 1, a degassing rotating mechanism 2, a heat preservation cover 3 and a heat preservation box 4, wherein the heat preservation cover 3 is arranged at the bottom of the lifting seat 1, the degassing rotating mechanism 2 is installed on the lifting seat 1 and passes through the heat preservation cover 3, and the heat preservation box 4 is located below the heat preservation cover 3;

[0041] The bottom edge of the heat preservation cover 3 is provided with a heat-resistant plate 31, and the top surface of the heat preservation box 4 is provided with a support plate 41. When the lifting seat 1 drives the heat preservation cover 3 to descend to the top surface of the heat preservation box, the heat-resistant plate 31 fits with the support plate 41;

[0042] A plurality of baffles 32 are provided at the bottom of the heat preservation cover 3, and the top width of the baffles 32 is greater than the bottom width; the heat preservation box body 4 has a flow channel 42 with an opening at the top, and the baffles 32 are perpendicular to the flow direction of the liquid in the flow channel 42; the top width of the flow channel 42 corresponds to the top width of the baffle 32, and the bottom width of the flow channel 42 is greater than the bottom width of the baffle 32;

[0043] A liquid inlet 43 and a liquid outlet 44 are provided at both ends of the flow channel 42 , and baffles 32 are provided at the liquid inlet 43 and the liquid outlet 44 .

[0044] In the technical solution, by providing the heat-resistant plate 31 of the heat-insulating cover 3 and the abutting plate 41 of the heat-insulating box 4, a seal is formed at the front and rear edges of the heat-insulating box 4 during degassing, and the liquid inlet 43 and the liquid outlet 44 at both ends of the convection groove 42 are blocked by the baffle 32 at the bottom of the heat-insulating cover 3. When the heat-insulating cover 3 and the heat-insulating box 4 are abutted, a relatively sealed space is formed between the two, which effectively prevents the rapid diffusion of the inert gas, increases the contact time between the inert gas and the aluminum liquid, improves the purification effect of the aluminum liquid, and can also improve the insulation effect of the heat-insulating cover 3 and the heat-insulating box 4 on the aluminum liquid.

[0045] In addition, the top width of the flow slot 42 corresponds to the top width of the baffle 32, the bottom width of the flow slot 42 is greater than the bottom width of the baffle 32, and the upper part of the baffle 32 forms a blockage on the top of the flow slot 42. It should be noted that the liquid level in the flow slot 42 is located at the upper part of the baffle 32, and the aluminum liquid can flow between the lower part of the flow slot 42 and the gap between the baffle 32. The baffle 32 can also intercept impurities floating on the surface of the aluminum liquid. Figure 4 , the dotted line is the liquid level position of the aluminum liquid in the flow channel 42.

[0046] Exemplarily, the heat-resistant plate 31 and the abutting plate 41 are both flat steel plates, and the two can be closely attached to each other. The heat-resistant plate 31 and the abutting plate 41 are fixed to the heat-insulating cover 3 or the heat-insulating box body 4 with screws.

[0047] It should be noted that the inner walls of the baffle 32 and the flow channel 42 are both relatively hard, so the baffle 32 cannot completely block the flow channel 42. After the inert gas introduced into the aluminum liquid overflows, a micro-pressure is formed between the insulation cover 3 and the insulation box 4, which can slow down the overflow of the inert gas to the outside, thereby increasing the contact time between the inert gas and the aluminum liquid.

[0048] Preferably, the width of the liquid inlet 43 and the liquid outlet 44 are both smaller than the width of the baffle 32, so that the baffle 32 can intercept impurities floating on the surface of the molten aluminum discharged from the furnace, and can also intercept impurities floating on the surface of the molten aluminum in the insulation box 4, so that the molten aluminum discharged from the insulation box 4 is cleaner.

[0049] In one embodiment of the utility model, the heat-insulating box body 4 includes an outer shell 45 and an inner liner 46, the inner liner 46 is located in the outer shell 45, and a heat-insulating space 47 is formed between the inner liner 46 and the outer shell 45, and the heat-insulating space 47 is filled with heat-insulating materials, and the inner wall of the inner liner 46 is provided with a refractory material layer 48. The strength of the heat-insulating box body 4 is improved by the arrangement of the outer shell 45 and the inner liner 46, and the heat-insulating effect is improved by filling the heat-insulating space 47 with heat-insulating materials, and the refractory material layer 48 is provided with support, thereby improving the fire-resistant performance of the heat-insulating box body 4. Exemplarily, the heat-insulating material is ceramic fiber wool or ceramic nanoparticles, and the refractory material layer 48 is cast by refractory materials. Specifically, the abutment plate 41 is connected to the top surface of the outer shell 45 and the heat-insulating material by screws, and the abutment plate 41 is easy to install.

[0050] Preferably, the inner liner 46 is folded outward at the liquid inlet 43 and the liquid outlet 44 to connect with the outer shell 45, and a docking notch 49 is formed at the liquid inlet 43 and the liquid outlet 44. The heat preservation box 4 is installed on the liquid outlet channel to achieve online degassing. Therefore, the docking notch 49 facilitates the heat preservation box 4 to connect the liquid outlet tank and the liquid receiving tank, wherein the inlet end of the liquid outlet tank is connected to the liquid outlet 44 of the smelting furnace, and the outlet end of the liquid receiving tank corresponds to the aluminum ingot mold.

[0051] Preferably, the surfaces of the heat-resistant plate 31 and the abutting plate 41 are both frosted surfaces, so that the heat-resistant plate 31 and the abutting plate 41 can achieve a better sealing effect after contacting each other.

[0052] In one embodiment of the utility model, a connecting tube 33 is provided on the top of the heat-insulating cover 3, and a spring is provided in the connecting tube 33; the lifting seat 1 is provided with a connecting rod 11, and the bottom end of the connecting rod 11 is limited in the connecting tube 33 and slidably cooperates with the connecting tube 33, and the bottom end of the connecting rod 11 is against the spring.

[0053] The spring is used to realize the suspended installation of the heat preservation cover 3 on the lifting seat 1, so that the heat preservation cover 3 can be pressed on the heat preservation box 4 with a certain force, thereby improving the sealing effect. Preferably, the connecting rod 11 is provided with a thread, and a nut is sleeved on the connecting rod 11 so that the nut and the lifting seat 1 are abutted, so that the installation height of the connecting rod 11 on the lifting seat 1 can be adjusted, thereby making the installation height of the heat preservation cover 3 adjustable.

[0054] In one embodiment of the utility model, three baffles 32 are arranged at the bottom of the heat preservation cover 3, and a plurality of degassing rotating mechanisms 2 are arranged between two adjacent baffles 32. The arrangement of a plurality of degassing rotating mechanisms 2 increases the degassing processing capacity and has a better degassing processing effect.

[0055] Specifically, the degassing rotating mechanism 2 includes a driving motor 21, a rotating shaft 22, a graphite shaft 23 and a graphite rotor 24; the driving motor 21 is installed on the lifting seat 1, the output end of the driving motor 21 is connected to the top of the rotating shaft 22, the bottom end of the rotating shaft 22 is connected to the top of the graphite shaft 23, and the graphite rotor 24 is arranged at the bottom end of the graphite shaft 23; an air passage 241 is arranged in the rotating shaft 22, the graphite shaft 23 and the graphite rotor 24; a sealing sleeve is arranged between the insulation cover 3 and the graphite shaft 23.

[0056] When the heat preservation cover 3 is lowered to abut against the heat preservation box 4, the graphite shaft 23 and the graphite rotor 24 are inserted into the aluminum liquid, and the driving motor 21 drives the graphite shaft 23 and the graphite rotor 24 to rotate through the rotating shaft 22. At the same time, the inert gas enters the graphite rotor 24 from the gas passage 241 and is dispersed in the aluminum liquid by the graphite rotor 24. Based on the sealing cooperation between the heat preservation cover 3 and the heat preservation box 4, the speed of the inert gas overflowing in the aluminum liquid is slowed down, and the hydrogen in the aluminum liquid is absorbed into the tiny bubbles of the inert gas, and the tiny bubbles float to the surface of the aluminum liquid, thereby achieving the purpose of dehydrogenation. At the same time, the above-mentioned bubbles can also bring the slag out of the aluminum liquid melt.

[0057] It can be understood that the graphite shaft 23 is matched with the insulation cover 3, and the rotating shaft 22 does not extend into the lower part of the insulation cover 3. Based on the good high temperature resistance of the graphite shaft 23, it can prevent impurities from being mixed into the aluminum liquid. The sealing sleeve between the insulation cover 3 and the graphite shaft 23 is used to improve the sealing effect of the insulation cover 3 and prevent the inert gas from overflowing from the gap between the insulation cover 3 and the graphite shaft 23.

[0058] Exemplarily, the top end of the graphite shaft 23 is threadedly connected to the rotating shaft 22 , and the bottom end of the graphite shaft 23 is threadedly connected to the graphite rotor 24 .

[0059] Preferably, the graphite rotor 24 is cylindrical, and the air channel 241 is located at the center of the top of the graphite rotor 24; a plurality of grooves 242 are distributed centripetally at the bottom of the graphite rotor 24, and the first end opening of the groove 242 is located at the outer peripheral wall of the graphite rotor 24, and the second end of the groove 242 is connected to the air channel 241 through the air hole 243; the top surface and the bottom surface of the graphite rotor 24 are both planes and parallel to each other.

[0060] The inert gas enters the graphite rotor 24 through the air hole 243 and then enters the groove 242. As the graphite rotor 24 rotates, the inert gas entering the groove 242 is dispersed into fine bubbles. In addition, the top and bottom surfaces of the graphite rotor 24 are both flat and parallel to each other, which can effectively prevent the formation of vortices and ensure that the surface of the aluminum liquid in the insulation box 4 is calm.

[0061] Other structures and operations of the online degassing device for aluminum alloy liquid according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0062] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An online degassing device for aluminum alloy liquid, characterized in that: It includes a lifting seat, a degassing rotating mechanism, a heat preservation cover and a heat preservation box, wherein the heat preservation cover is arranged at the bottom of the lifting seat, the degassing rotating mechanism is installed on the lifting seat and passes through the heat preservation cover, and the heat preservation box is located below the heat preservation cover; The bottom edge of the heat preservation cover is provided with a heat-resistant plate, and the top surface of the heat preservation box is provided with a supporting plate. When the lifting seat drives the heat preservation cover to descend to the top surface of the heat preservation box, the heat-resistant plate fits against the supporting plate. The bottom of the heat preservation cover is provided with a plurality of baffles, the top width of the baffles being greater than the bottom width; the heat preservation box body has a flow channel with an opening at the top, the baffles are perpendicular to the flow direction of the liquid in the flow channel; the top width of the flow channel corresponds to the top width of the baffles, and the bottom width of the flow channel is greater than the bottom width of the baffles; A liquid inlet and a liquid outlet are arranged at both ends of the flow channel, and the baffles are corresponding to the liquid inlet and the liquid outlet.

2. The online degassing device for aluminum alloy liquid according to claim 1, characterized in that: The widths of the liquid inlet and the liquid outlet are both smaller than the width of the baffle.

3. The online degassing device for aluminum alloy liquid according to claim 1, characterized in that: The heat preservation box body comprises an outer shell and an inner shell, wherein the inner shell is located inside the outer shell, and a heat preservation space is formed between the inner shell and the outer shell, wherein the heat preservation space is filled with heat preservation material, and a refractory material layer is provided on the inner wall of the inner shell.

4. The online degassing device for aluminum alloy liquid according to claim 3, characterized in that: The abutment plate is connected to the outer shell and the top surface of the heat-insulating material by screws.

5. The online degassing device for aluminum alloy liquid according to claim 3, characterized in that: The inner container is folded outward at the liquid inlet and the liquid outlet to be connected to the outer shell, and a docking groove is formed at the liquid inlet and the liquid outlet.

6. The online degassing device for aluminum alloy liquid according to claim 1, characterized in that: The surfaces of the heat-resistant plate and the abutting plate are both frosted surfaces.

7. The online degassing device for aluminum alloy liquid according to claim 1, characterized in that: A connecting tube is arranged on the top of the heat-insulating cover, and a spring is arranged inside the connecting tube; The lifting seat is provided with a connecting rod, the bottom end of the connecting rod is limited in the connecting tube and slidingly matched with the connecting tube, and the bottom end of the connecting rod is against the spring.

8. The online degassing device for aluminum alloy liquid according to claim 1, characterized in that: The bottom of the heat-insulating cover is provided with three baffles, and a plurality of degassing rotating mechanisms are provided between two adjacent baffles.

9. The online degassing device for aluminum alloy liquid according to claim 1 or 7, characterized in that: The degassing rotating mechanism includes a driving motor, a rotating shaft, a graphite shaft and a graphite rotor; The driving motor is installed on the lifting seat, the output end of the driving motor is connected to the top end of the rotating shaft, the bottom end of the rotating shaft is connected to the top end of the graphite shaft, and the graphite rotor is arranged at the bottom end of the graphite shaft; the rotating shaft, the graphite shaft and the graphite rotor are provided with air passages; A sealing sleeve is arranged between the heat-insulating cover and the graphite shaft.

10. The online degassing device for aluminum alloy liquid according to claim 9, characterized in that: The graphite rotor is cylindrical, and the air passage is located at the center of the top of the graphite rotor; A plurality of grooves are distributed centripetally at the bottom of the graphite rotor, the first end opening of the groove is located at the outer peripheral wall of the graphite rotor, and the second end of the groove is connected to the air channel through an air hole; The top surface and the bottom surface of the graphite rotor are both plane and parallel to each other.

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