Device for removing floating slag on surface layer of alloy liquid in rotary smelting furnace

Abstract

The utility model discloses a device for removing floating slag on the surface layer of alloy liquid in a rotary smelting furnace, which comprises a crucible and a cover which is matched with the crucible in caliber and can be fixedly connected with the crucible, and the cover is totally closed or semi-closed; the flow guide channel penetrates through and is fixed to the cover, one part of the flow guide channel is located in the crucible, the other part of the flow guide channel is located outside the crucible, and the flow guide channel is used for transferring alloy liquid into the collecting device from the crucible. The device can thoroughly remove the scum on the surface layer of the alloy liquid, and can thoroughly solve the problem that the service performance of the alloy becomes poor due to the fact that a small amount of scum is doped in the alloy.

Description

Technical Field

[0001] The utility model belongs to the field of alloy melting production equipment, and relates to a device for eliminating surface dross during alloy casting production, in particular to a device for removing the dross on the surface layer of alloy liquid in a rotary melting furnace. Background Technique

[0002] Generally, alloy melting is the first step in preparing alloy materials. During the alloy melting process, affected by factors such as the purity of raw materials and the melting environment, dross composed of metal oxides, metal nitrides, etc. is extremely likely to appear on the surface of the molten alloy liquid. When transferring the alloy liquid from the furnace to the collection tank or mold, it is inevitable to transfer the dross on the surface of the alloy liquid together, and some fine dross will also be entrained into the alloy liquid during the transfer process. As the alloy liquid solidifies, these entrained dross will be "locked" inside the alloy, thus having a very adverse impact on the service performance of the alloy.

[0003] In order to reduce or eliminate the problem that dross and alloy liquid are transferred into the mold together during the transfer of alloy liquid, various slag blocking or (and) slag removing devices have been invented. For example, the patent application No. 201210457606.9 discloses an alloy melting equipment and its runner, and this invention discloses a runner for alloy melting equipment. However, during the transfer of alloy liquid, the devices invented in such disclosed patents can only reduce the amount of dross carried during the transfer of alloy liquid, but cannot completely remove the dross.

[0004] Under natural conditions, when the alloy is completely melted, the schematic diagram of the alloy liquid, dross in the crucible and the collection tank placed on the horizontal plane is as Figure 1 shown. As Figure 1 can be seen, the bottom of the crucible is above the collection tank, and both are in the gravitational field, so the crucible and the alloy liquid inside it have a higher potential energy than the collection tank.

[0005] In physics, according to the high and low energies of an object, its state is divided into a stable state, a metastable state and an unstable state. A brief description of these three states is as Figure 2 shown. The small ball in this figure is in the gravitational field, Figure 2 In a, the small ball is on the horizontal plane, its energy is the lowest, and the state of the small ball is the most stable, corresponding to the stable state; Figure 2 In b, the position of the small ball is significantly higher than the horizontal plane. The small ball on the inclined plane will automatically roll onto the horizontal plane, and the small ball on the inclined plane is in an unstable state; while Figure 2The position of the small ball in C is significantly higher than the horizontal plane. However, the small ball can stably exist in the groove and will not automatically roll onto the horizontal plane. If one wants to move the small ball in the groove to the horizontal plane, a little energy needs to be given to the small ball to overcome the restraint of the groove, and then the small ball can automatically roll onto the horizontal plane. The state of the small ball located in the groove is called metastable state. After applying a certain amount of energy to overcome the energy barrier, the metastable state will automatically transform into a stable state.

[0006] Undoubtedly, the alloy liquid contained in the crucible is in a metastable state relative to the collection trough below. Although the alloy liquid has a higher potential energy than the collection trough, due to the restraint of the crucible on the alloy liquid, it will not automatically flow into the collection trough with lower energy. For a rotary melting furnace, in order to transfer the alloy liquid from the crucible to the collection trough, the crucible can be turned by a certain angle (applying a certain amount of energy to overcome the restraint of the crucible). For example, in a certain rotary melting furnace, the situation where the crucible is in a turned state is as Figure 3 shown. By eliminating the restraint of the crucible wall on the alloy liquid, the alloy liquid will automatically flow into the collection trough below. Obviously, the dross floating on the upper layer of the alloy liquid will also flow out together. If the alloy liquid does not flow out from above the crucible but from below the crucible, since the dross always floats on the surface of the alloy liquid, during the process of transferring the alloy liquid, the mixing of dross will be completely prevented. Utility Model Content

[0007] During the process of transferring the alloy liquid, in order to completely prevent the mixing of dross, if one wants the alloy liquid to flow from below the crucible of the rotary melting furnace into the collection trough, two problems need to be solved: 1. Increase a certain amount of energy to eliminate the energy barrier formed by the restraint of the crucible wall; 2. Provide a channel for the alloy liquid to flow out.

[0008] Add a semi-closed or fully-closed lid with a diversion channel to the crucible. When the alloy liquid in the crucible is in a metastable state, after covering the lid with the diversion channel on the crucible, the alloy liquid in the crucible cannot automatically flow into the collection trough below through the diversion channel. It is necessary to apply a certain amount of energy to the alloy liquid in the crucible to break the metastable state. For this purpose, tilt the crucible. When tilted to a certain angle, under the action of gravity, the alloy liquid will flow out from the diversion channel and into the collection trough below the crucible. Once the alloy liquid flows out from the diversion channel, when the crucible is returned to its original position, at this time, since the height of the alloy liquid at the outlet of the diversion channel is significantly lower than that of the alloy liquid in the crucible, it indicates that the alloy liquid in the crucible has a higher energy, and the energy barrier generated by the restraint of the crucible wall has been broken, and the alloy liquid will continuously flow from the high-energy area to the low-energy area. Since the alloy liquid always flows out from the bottom of the crucible during the entire outflow process, and the dross always lies in the upper part of the crucible, when there is still a small amount of alloy liquid left in the crucible, replace the collection trough to avoid entraining the dross during the process of collecting the remaining alloy liquid and ensure that there is no dross in the original collection trough. Therefore, this device can completely remove the dross on the surface of the alloy liquid, thus completely solving the problem that the service performance of the alloy deteriorates due to a small amount of dross doped in the alloy.

[0009] Based on the above analysis, the specific technical solution of this application is: a device for removing the dross on the surface layer of the alloy liquid in a rotary smelting furnace, which includes a crucible 1 and a lid 2 that is adapted to the caliber of the crucible 1 and fixedly connected. The lid 2 is fully-closed or semi-closed; a diversion channel 3 passes through the lid 2, with a part inside the crucible and another part outside the crucible, for transferring the alloy liquid from the crucible 1 into a collection device 4.

[0010] The lid 2 is a semi-closed or fully-closed lid with an observation window.

[0011] The part of the diversion channel 3 inside the crucible 1 is close to the furnace bottom, and the vertical length of the part outside the crucible 1 exceeds the height of the crucible 1.

[0012] The horizontal height of the crucible 1 is at least 8 cm higher than the horizontal height of the collection device 4.

[0013] The diversion channel 3 is tubular and is fixedly and hermetically connected to the lid 2.

[0014] The pipe diameter of the diversion channel 3 is 1.5 - 75 cm. Description of the Drawings

[0015] Figure 1 Schematic diagram of the alloy liquid, dross and collection trough in the natural state;

[0016] Figure 2 Schematic diagram of the stable state, unstable state and metastable state;

[0017] Figure 3 Schematic diagram of the semi - enclosed lid with a diversion channel in Embodiment 1 of the present utility model;

[0018] Figure 4 Schematic diagram of the alloy liquid flowing into the collection tank through the diversion channel after tilting the crucible in Embodiment 1 of the present utility model;

[0019] Figure 5 Schematic diagram of the alloy liquid automatically flowing into the collection tank through the diversion channel after tilting the crucible in Embodiment 1 of the present utility model.

[0020] Among them, 1 - crucible; 2 - lid; 3 - diversion channel; 4 - collection device. Specific implementation mode

[0021] The following embodiments are used to illustrate the present utility model, but cannot be used to limit the protection scope of the present utility model. The conditions in the embodiments can be further adjusted according to specific conditions. Any simple improvement of the method of the present utility model under the premise of the concept of the present utility model belongs to the scope protected by the present utility model. Embodiment

[0022] As Figures 3 - 5 shown, the device for removing the floating slag on the surface of the alloy liquid in the rotary smelting furnace includes a crucible 1 and a lid 2 adapted to the caliber of the crucible 1. The two are fixedly connected by means of screws. The lid 2 is semi - enclosed. The schematic diagram of the lid 2 is as Figure 3 shown, and it is hemispherical;

[0023] The diversion channel 3 passes through the lid 2. The diversion channel 3 is a round tube made of a material that does not react with the alloy liquid. It is fixed on the lid 2 by means of thread fixation. A part is located inside the crucible. The length of this part depends on the depth of the crucible. It is appropriate to keep the bottom of this part 3 - 5 cm away from the bottom of the crucible; another part is located outside the crucible. The vertical height of this part also depends on the depth of the crucible, and its vertical height only needs to exceed the vertical depth of the crucible. The diversion channel 3 is used to flow the alloy liquid from inside the crucible into the collection device 4.

[0024] During use, as Figure 4 shown, tilt the crucible. When tilting to a certain angle, the size of the tilting angle depends on the percentage of the volume of the alloy liquid in the crucible accounting for the volume of the crucible. When the proportion of the alloy liquid is higher, the tilting angle is smaller. The tilting angle range is 8° - 145°. Under the action of gravity, the alloy liquid will flow out from the diversion channel and flow into the collection tank below the crucible. Once the alloy liquid flows out from the diversion channel, immediately return the crucible to its original position. At this time, since the vertical height of the alloy liquid at the outlet of the diversion channel is significantly lower than that of the alloy liquid in the crucible, it indicates that the alloy liquid in the crucible has higher energy, and the energy barrier generated by the restraint of the crucible wall has been broken. The alloy liquid will continuously flow from the high - energy place to the low - energy place, as Figure 5as shown

[0025] When it is observed from the semi - closed lid 2 that the dross is almost at the bottom, replace the collection device to ensure that there is no dross in the alloy liquid in the original collection device, thus completely solving the problem that the service performance of the alloy deteriorates due to doping a small amount of dross in the alloy. Embodiment

[0026] A device for removing dross on the surface of alloy liquid in a rotary smelting furnace, comprising a crucible 1, the vertical height of the crucible 1 is significantly higher than the collection tank below, a lid 2 adapted to the caliber of the crucible 1 and fixedly connected, the lid 1 is fixedly connected to the crucible 2 by means of a ferrule, the lid 2 is a fully - enclosed lid with an observation hole, a diversion channel 3 passes through the lid 2, the diversion channel 3 is fixed on the lid 2 by welding, a part of the diversion channel is located inside the crucible, the length of this part depends on the depth of the crucible, and it is appropriate to keep the bottom of this part 3 - 5 cm away from the bottom of the crucible; another part is located outside the crucible, the length of this part also depends on the depth of the crucible, specifically, its vertical height is more than 2 cm higher than the depth of the crucible, and the diversion channel 3 is used to flow the alloy liquid from the crucible into the collection device 4.

[0027] During use, tilt the crucible. When tilted to a certain angle, under the action of gravity, the alloy liquid will flow out from the diversion channel and flow into the collection tank below the crucible. Once the alloy liquid flows out from the diversion channel, immediately return the crucible to its original position. At this time, since the height of the alloy liquid at the outlet of the diversion channel is significantly lower than that of the alloy liquid in the crucible, it indicates that the alloy liquid in the crucible has higher energy, and the energy barrier generated by the restraint of the crucible wall has been broken, and the alloy liquid will continuously flow from the high - energy area to the low - energy area.

[0028] When it is observed from the observation hole of the fully - enclosed lid 2 that the dross is almost at the bottom of the crucible, replace the collection device to ensure that there is no dross in the alloy liquid in the original collection device, thus completely solving the problem that the service performance of the alloy deteriorates due to doping a small amount of dross in the alloy.

Claims

1. A device for removing the scum on the surface layer of the alloy liquid in a rotary smelting furnace, characterized in that, It includes a crucible (1) and a lid (2) that is adapted to the caliber of the crucible (1) and fixedly connected. The lid (2) is fully enclosed or semi-enclosed; a diversion channel (3) passes through the lid (2) and is fixed to the lid (2). A part of the diversion channel (3) is located inside the crucible (1), and the other part is located outside the crucible (1), and is used to transfer the alloy liquid from inside the crucible (1) into a collection device (4).

2. The device for removing the dross on the surface layer of the alloy liquid in the rotary smelting furnace according to claim 1, wherein The lid (2) is a semi-enclosed lid or a fully enclosed lid with an observation window.

3. The device for removing the dross on the surface layer of the alloy liquid in the rotary smelting furnace according to claim 1, wherein, The part of the diversion channel (3) inside the crucible (1) is close to the furnace bottom, and the vertical length of the part outside the crucible (1) exceeds the depth of the crucible (1).

4. The device for removing the scum on the surface layer of the alloy liquid in the rotary smelting furnace according to claim 1, characterized in that, The horizontal height of the crucible (1) is higher than the horizontal height of the collection device (4).

5. The device for removing the scum on the surface of the alloy liquid in the rotary smelting furnace according to claim 1, wherein The diversion channel (3) is made of a material that does not react with the alloy liquid, and it is fixedly and sealedly connected to the lid (2).

6. The device for removing the dross on the surface layer of the alloy liquid in the rotary smelting furnace according to claim 5, characterized in that, The pipe diameter of the diversion channel (3) is 1.5 - 75 cm.

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