Blockage-free powder spraying tank structure for aluminum alloy refining

Abstract

The invention discloses a non-clogging powder spraying tank structure for aluminum alloy refining, which comprises a powder spraying tank body, a transition pipe, a powder spraying outlet pipe and an air inlet pipe, the bottom of the powder spraying tank body is provided with an outlet, the outlet is connected with the upper end of the transition pipe, the lower end of the transition pipe is connected with the inlet end of the powder spraying outlet pipe, and the air inlet pipe is connected with the air inlet pipe. The transition pipe is obliquely arranged in the spraying direction of the powder spraying outlet pipe, the included angle between the spraying direction of the powder spraying outlet pipe and the axial direction of the powder spraying tank body is not smaller than 90 degrees, the air inlet pipe is connected to the rear end of the powder spraying outlet pipe, and the included angle between the axial direction of the air inlet pipe and the spraying direction of the powder spraying outlet pipe ranges from 120 degrees to 160 degrees. The axis of the transition pipe, the axis of the air inlet pipe and the axis of the powder spraying outlet pipe are different from each other. The device can solve the problem of blockage caused by powder spraying of a refining agent in the refining process.

Description

Technical Field

[0001] The invention relates to a powder spray can structure and belongs to the technical field of spray devices. Background Art

[0002] During the smelting process, the metal raw materials will inevitably contain some harmful elements, oxide inclusions and other impurities. If these impurities are not removed in time, they will seriously affect the purity of the metal and the subsequent processing performance. By spraying specific refining powders, such as deoxidizers and desulfurizers, into the melt, these impurities can be effectively removed, thereby improving the purity of the metal. The powder spray tank is mainly used for the refining treatment of aluminum alloys. By adding refining agents to the molten aluminum liquid, oxides and other impurities in the aluminum liquid are removed to improve the quality of the aluminum alloy. The powder spray tank is the main equipment in the powder spraying process device. Its bottom outlet is connected to a straight blowpipe. After the refining agent in the powder spray tank falls into the blowpipe, it uses inert (nitrogen or argon) as a carrier to evenly deliver the powder flux into the melt to achieve the purification of the melt. However, since most refining agents have a certain degree of hygroscopicity, the fluidity of the refining agent after being loaded into the powder spray tank decreases, resulting in frequent blockages during the powder spraying process, causing the refining process to be unable to be implemented normally. Summary of the invention

[0003] In view of the above-mentioned defects of the prior art, the present invention provides a non-clogging powder spraying tank structure for aluminum alloy refining to solve the clogging problem in the powder spraying process.

[0004] The technical solution of the present invention is as follows: A non-clogging powder spray tank structure for aluminum alloy refining, comprising a powder spray tank body, a transition pipe, a powder spray outlet pipe and an air inlet pipe, an outlet is provided at the bottom of the powder spray tank body, the outlet is connected to the upper end of the transition pipe, the lower end of the transition pipe is connected to the inlet end of the powder spray outlet pipe, the transition pipe is inclined to the spray direction of the powder spray outlet pipe, the spray direction of the powder spray outlet pipe and the axial angle of the powder spray tank body are not less than 90°, the air inlet pipe is connected to the rear end of the powder spray outlet pipe, the axial direction of the air inlet pipe and the spray direction of the powder spray outlet pipe are 120° to 160°, the axis of the transition pipe, the axis of the air inlet pipe and the axis of the powder spray outlet pipe are not in the same plane.

[0005] Furthermore, a tapered section is provided at the bottom of the spray powder can body, and the outlet is arranged at the bottom end of the tapered section.

[0006] Furthermore, the shrinkage angle of the tapered section is 30° to 60°.

[0007] Furthermore, the inclination angle of the axial direction of the transition pipe relative to the axial direction of the powder spray can body is 30° to 60°.

[0008] Furthermore, the projection angle of the included angle between the axial direction of the air inlet pipe and the spraying direction of the powder spray outlet pipe on the vertical plane is 135° to 145°.

[0009] Furthermore, the projection angle of the included angle between the axial direction of the air inlet pipe and the spraying direction of the powder spray outlet pipe on the horizontal plane is 135° to 145°.

[0010] Furthermore, the tail section of the powder spray outlet pipe is an expansion pipe that gradually expands along the spraying direction, and the transition pipe and the air inlet pipe are connected to the end of the expansion pipe.

[0011] Furthermore, the expansion angle of the expansion tube is 5° to 15°.

[0012] Furthermore, a can cover is provided on the top of the powder spray can body, and a plurality of ventilation holes are provided on the can cover, and the diameter of the ventilation holes is 6 to 10 mm. During pneumatic powder spraying, the normal pressure state inside the powder spray can body can be maintained, and the gas-driven powder spraying process will proceed more smoothly.

[0013] Furthermore, in order to better prevent clogging during the powder spraying process, the powder spray can body is clamped by a clamping device, and the clamping device is provided with a vibration generator.

[0014] Compared with the prior art, the advantages of the technical solution provided by the present invention are: The present invention adopts an inclined transition pipe, so that the refining agent in the powder spray tank body can be inclined to fall at the powder spray outlet pipe. With the arrangement of the transition pipe, the air intake pipe and the powder spray outlet pipe on different surfaces, the air intake of the inclined air intake pipe can form a rotating airflow, so that the movement of the refining agent powder is in a swirl shape, which can effectively prevent the deposition of the powder, especially prevent the accumulation under the transition pipe, and reduce the occurrence of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of a non-clogging powder spray tank used for aluminum alloy refining.

[0016] Figure 2 for Figure 1 AA direction schematic diagram.

[0017] Figure 3 for Figure 1 B side schematic diagram.

[0018] Figure 4 The schematic diagram of the structure of a non-clogging powder spray tank for aluminum alloy refining is clamped by a clamping device. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with examples. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading this description, various equivalent modifications to this description by those skilled in the art fall within the scope defined by the claims attached to this application.

[0020] Please combine Figures 1 to 3 As shown, the non-clogging powder spray tank structure for aluminum alloy refining of this embodiment includes a powder spray tank body 1, a transition pipe 2, a powder spray outlet pipe 3 and an air inlet pipe 4. The volume of the powder spray tank body 1 is determined according to the mass of the powder refining agent determined by 0.1% to 0.5% of the mass of the aluminum alloy melt. A tank cover 5 is provided on the top of the powder spray tank body 1, and the tank cover 5 is connected to the powder spray tank body 1 through a thread. The tank cover 5 is provided with 4 to 20 evenly distributed through holes 501 with a diameter of 6 to 10 mm. These through holes 501 allow air to enter the powder spray tank body 1. During pneumatic powder spraying, the normal pressure state in the tank body 1 can be maintained, and the gas-driven powder spraying process will proceed more smoothly. The upper part of the powder spray can body 1 is generally cylindrical, and the lower part of the powder spray can body 1 is a tapered section 101. The tapered section 101 forms a truncated cone shape with a larger upper portion and a smaller lower portion. The shrinkage angle α of the tapered section 101 is 30° to 60°, and is set to 45° in this embodiment.

[0021] The bottom end of the tapered section 101 is the outlet of the spray powder can body 1, which is connected to an inclined transition pipe 2 and provided with a valve 6. The axial inclination angle β of the transition pipe 2 relative to the axial direction of the spray powder can body 1 is 30° to 60°, and is set to 30° in this embodiment. The diameter of the transition pipe 2 depends on the size of the spray powder can body 1, which is approximately 12 to 30 mm. The lower end of the transition pipe 2 is connected to the inlet end of the spray powder outlet pipe 3. The spray powder outlet pipe 3 includes two parts, the tail section of which is an expansion pipe 301 that gradually expands along the injection direction, and the head section is a straight pipe 302. The expansion angle γ of the expansion pipe 301 is 5° to 15°, and the rear end of the expansion pipe 301 is the inlet end of the spray powder outlet pipe 3. Generally speaking, the spray powder can body 1 is vertically arranged, and the spray powder outlet pipe 3 is horizontally arranged. The spray direction of the spray powder outlet pipe 3 can also be tilted downward so that the spray direction of the spray powder outlet pipe 3 and the axial angle of the spray powder can body 1 exceed 90°.

[0022] The inlet end of the powder spray outlet pipe 3, i.e., the rear end of the expansion pipe 301, is also connected to an inclined air intake pipe 4, which is connected to an inert gas source to provide power for the spraying of the refining agent powder. The inclined air intake pipe 4 is not in a horizontal plane, nor in a vertical plane, i.e., the axis of the transition pipe 2, the axis of the air intake pipe 4, and the axis of the powder spray outlet pipe 3 are not in the same plane. The axial direction of the air intake pipe 4 and the spray direction of the powder spray outlet pipe 3 have an angle of 120° to 160°. In this embodiment, the projection angle of the axial direction of the air intake pipe 4 and the spray direction of the powder spray outlet pipe 3 on the vertical plane is 135°, i.e., θ is 45°, and the projection angle of the axial direction of the air intake pipe 4 and the spray direction of the powder spray outlet pipe 3 on the horizontal plane is 135°, i.e., ω is 45°.

[0023] like Figure 4 As shown, when the non-clogging powder spray tank structure for aluminum alloy refining is used, the powder spray tank body 1 is clamped on the clamping device 7, and the clamping device 7 can be a spring clamp. A vibration generator 8 is arranged on the clamping device 7. During the powder spraying process, the vibration generator 8 causes the powder spray tank body 1 to vibrate through the clamping device 7, loosening the refining agent powder in the powder spray tank body 1, and the air intake of the air intake pipe 4 generates a rotating airflow in the powder spray outlet pipe 3, so that the movement of the powder is in a swirl shape, which can effectively prevent the powder from forming sedimentation blockage.

[0024] The specific powder spraying operation is: (1) Close the valve 6 of the powder spray tank; weigh the predetermined mass of flux powder, which is generally about 0.15-0.20% of the mass of the aluminum liquid; add the flux powder into the tank body 1 of the powder spray tank; connect the inert gas tank to the air inlet pipe 4 with a hose; connect the powder spray outlet pipe 3 and the spray gun with a hose; (2) Turn on the inert gas tank switch, insert the spray gun into the aluminum liquid, adjust the nitrogen gas pressure to obtain a suitable powder spraying pressure, generally controlled at 0.1-0.3Pa; (3) Open the valve 6 of the spray powder tank 1, and then turn on the vibration generator 8, with a vibration amplitude of 1-5 mm and a vibration frequency of 300-800 times / min; (4) Insert the spray gun into the aluminum liquid and move the spray gun horizontally to evenly deliver the flux to all parts until the fixed amount of flux is delivered; after the flux is sprayed, withdraw the spray gun from the aluminum liquid, and turn off the nitrogen and vibration generator 8; (5) The refining temperature is controlled at about 730-750 degrees Celsius. After the refining treatment, the slag can be removed after standing for 20 minutes. The non-clogging powder spraying tank structure for aluminum alloy refining of the present invention can be completely sprayed into the aluminum alloy melt when the flux loading amount is 1, 2, and 5 kg. After the treatment, the gas content of the melt is less than 0.12 ml / 100 g, and the oxidation amount is less than 6 PPm. In general, the device is used for refining powder spraying, which is simple and convenient to operate without clogging. The flux utilization rate is high, which can effectively reduce the impurity content in the aluminum liquid and improve the quality and performance of the aluminum alloy.

Claims

1. A non-clogging powder spraying tank structure for aluminum alloy refining, characterized in that: The utility model comprises a powder spray can body, a transition pipe, a powder spray outlet pipe and an air inlet pipe, wherein an outlet is arranged at the bottom of the powder spray can body, the outlet is connected to the upper end of the transition pipe, the lower end of the transition pipe is connected to the inlet end of the powder spray outlet pipe, the transition pipe is inclined to the spray direction of the powder spray outlet pipe, the spray direction of the powder spray outlet pipe and the axial angle between the spray direction of the powder spray can body are not less than 90°, the air inlet pipe is connected to the rear end of the powder spray outlet pipe, the axial direction of the air inlet pipe and the spray direction of the powder spray outlet pipe are at an angle of 120° to 160°, and the axis of the transition pipe, the axis of the air inlet pipe and the axis of the powder spray outlet pipe are not in the same plane.

2. The non-clogging powder spraying tank structure for aluminum alloy refining according to claim 1 is characterized in that: The bottom of the powder spray can body is provided with a tapered section, and the outlet is arranged at the bottom end of the tapered section.

3. The non-clogging powder spraying tank structure for aluminum alloy refining according to claim 2 is characterized in that: The shrinking angle of the tapered section is 30° to 60°.

4. The non-clogging powder spraying tank structure for aluminum alloy refining according to claim 1 is characterized in that: The inclination angle of the axial direction of the transition pipe relative to the axial direction of the powder spray can body is 30° to 60°.

5. The non-clogging powder spraying tank structure for aluminum alloy refining according to claim 1 is characterized in that: The projection angle of the included angle between the axial direction of the air inlet pipe and the spraying direction of the powder spray outlet pipe on the vertical plane is 135° to 145°.

6. The non-clogging powder spraying tank structure for aluminum alloy refining according to claim 1 is characterized in that: The projection angle of the included angle between the axial direction of the air inlet pipe and the spraying direction of the powder spray outlet pipe on the horizontal plane is 135° to 145°.

7. The non-clogging powder spraying tank structure for aluminum alloy refining according to claim 1 is characterized in that: The tail section of the powder spray outlet pipe is an expansion pipe that gradually expands along the spraying direction, and the transition pipe and the air inlet pipe are connected to the end of the expansion pipe.

8. The non-clogging powder spraying tank structure for aluminum alloy refining according to claim 7 is characterized in that: The expansion angle of the expansion tube is 5° to 15°.

9. The non-clogging powder spraying tank structure for aluminum alloy refining according to claim 1 is characterized in that: A can cover is arranged on the top of the can body of the spray powder can. A plurality of ventilation holes are arranged on the can cover. The diameter of the ventilation holes is 6-10 mm.

10. The non-clogging powder spraying tank structure for aluminum alloy refining according to any one of claims 1 to 9, characterized in that: The powder spray can body is clamped by a clamping device, and the clamping device is provided with a vibration generator.

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