Smoke discharging and dust removing device of powder atomization smelting furnace

Abstract

The utility model provides a powder atomization smelting furnace smoke discharge and dust removal device, including smelting furnace, gas bomb and bag-type dust collector, smelting furnace includes furnace body and furnace lid, furnace body and furnace lid encircle form smelting chamber, be equipped with the first gas inlet pipe that fits furnace body bottom wall in the smelting chamber, be equipped with a plurality of gas inlet on the first gas inlet pipe, be equipped with the bag-type dust collector on the gas bomb, the bag-type dust collector is equipped with the bag-type dust collector on the gas bomb. The air inlets are circumferentially distributed close to one side of the bottom wall of the furnace body; the gas storage bottle is used for storing inert gas, and the gas storage bottle penetrates through the side wall of the furnace body through a second gas inlet pipe to communicate with the first gas inlet pipe, so that the inert gas can enter the smelting cavity from the bottom of the furnace body; the furnace cover is provided with a feeding port and an air outlet, and a dust removal air inlet pipe of the bag-type dust remover is communicated with the air outlet through a first air outlet pipe. By controlling the oxygen content in the smelting furnace and utilizing the gas flow of the inert gas, the smoke dust generated in the atomization smelting process of the smelting furnace is discharged into the bag-type dust collector, so that the residual smoke dust in the smelting furnace is reduced, and the body health of staff is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy dust removal, in particular to a smoke exhaust dust removal device for a powder atomization smelting furnace. Background Art

[0002] Among the process technologies for preparing non-ferrous metal 3D printing metal powders, the vacuum induction melting gas atomization (VIGA) process has the advantages of good controllability, large output, and high fine powder yield. It is widely used in the automotive, aerospace, petrochemical and other fields. For example, it can be used to produce alloy powders for preparing turbine engine disc heat sinks in aerospace.

[0003] The basic principle of the vacuum induction melting gas atomization process is to heat and melt the aluminum alloy raw materials in the high-frequency induction furnace under a vacuum environment, then pour the aluminum liquid into the insulation pot and flow out from the guide tube, and finally, under the interaction with the supersonic gas, the alloy melt liquid flow is atomized and broken into micron-sized spherical powder. However, in the process of atomizing and smelting aluminum-magnesium alloys or other non-ferrous metals, oxidation and smelting produce a large amount of black smoke and dust, which often remain attached to the observation window and the inner wall of the smelting chamber, blocking the observation line of the employees, making it impossible for the employees to observe the situation in the smelting chamber in real time during the atomization period, and it is easy to cause aluminum liquid leakage and equipment damage. In addition, during the process of employees loading and cleaning the furnace, the dust remaining in the smelting chamber will cause harm to the health of the employees. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a smoke exhaust and dust removal device for a powder atomization smelting furnace, which aims to solve the technical problem in the prior art that the black smoke and dust generated in the smelting chamber during the atomization smelting process will remain attached to the observation window and the inner wall of the smelting chamber, resulting in employees being unable to observe the situation in the smelting chamber in real time during the atomization period, and easily causing harm to the health of the employees.

[0005] The utility model aims to provide a smoke exhaust and dust removal device for a powder atomization smelting furnace, comprising: a smelting furnace, a gas storage bottle and a bag dust collector, wherein the smelting furnace comprises a furnace body and a furnace cover, wherein the furnace body and the furnace cover together form a smelting chamber, wherein a first air inlet pipe in contact with the bottom wall of the furnace body is provided in the smelting chamber, wherein a plurality of air inlets are provided on the first air inlet pipe, and the air inlets are circumferentially distributed on one side close to the bottom wall of the furnace body;

[0006] The gas storage bottle is used to store inert gas, and the gas storage bottle is connected with the first gas inlet pipe through the second gas inlet pipe penetrating the side wall of the furnace body, so that the inert gas can enter the smelting chamber from the bottom of the furnace body;

[0007] The furnace cover is provided with a feeding port and an air outlet which is arranged at one side of the feeding port and is connected with the feeding port. The dust removal air inlet pipe of the bag filter is connected with the air outlet through a first air outlet pipe.

[0008] The smoke exhaust and dust removal device of the powder atomization smelting furnace is provided with a gas cylinder and a bag dust collector. Inert gas is stored in the gas cylinder. The bottom of the smelting furnace is connected to the gas cylinder through a first air inlet pipe and a second air inlet pipe, and the top of the smelting furnace is connected to the bag dust collector through a first air outlet pipe, so that a gas flow channel is formed among the gas cylinder, the smelting furnace and the bag dust collector. In actual use, the oxygen content in the smelting furnace is controlled by filling the smelting furnace with inert gas to effectively ensure the normal smelting atomization process in the smelting furnace, and a large amount of smoke generated in the atomization process of the smelting furnace is discharged into the bag dust collector for dust removal through the flow of the inert gas in the gas flow channel, thereby avoiding the obstruction of vision caused by the smoke adhering to the observation window. Employees can observe the smelting situation in the smelting furnace in real time, and reduce the residual smoke in the smelting furnace, thereby ensuring the health of employees during the process of loading or cleaning the smelting furnace.

[0009] In addition, the smoke exhaust and dust removal device of the powder atomization smelting furnace according to the utility model may also have the following additional technical features:

[0010] Furthermore, one end of the second air inlet pipe connected to the gas storage bottle is provided with a total pressure gauge, a pressure regulating valve and an air inlet pressure gauge in sequence.

[0011] Furthermore, a second air outlet pipe is provided on one side of the bottom of the furnace body, and the dust removal air inlet pipe is connected with the smelting chamber through the second air outlet pipe.

[0012] Furthermore, the first air outlet pipe and the second air outlet pipe are respectively provided with a control valve.

[0013] Furthermore, a smelting crucible and an insulation crucible are also provided in the smelting chamber. The smelting crucible is rotatably arranged in the furnace body through a rotating bracket. The insulation crucible is located on one side of the rotation direction of the smelting crucible and is fixed on the bottom wall in the furnace body. The first air inlet pipe is arranged in a ring in the circumference of the smelting crucible and the insulation crucible.

[0014] Furthermore, the rotating bracket includes a connecting plate fixedly mounted on the bottom wall of the furnace body, a fixed seat rotatably connected to one end of the connecting plate away from the bottom wall of the furnace body, and a connecting rod fixedly connected to the fixed seat, a gap is provided between the fixed seat and the bottom wall of the furnace body, and the smelting crucible is fixedly provided on the side of the fixed seat away from the bottom wall of the furnace body, one end of the connecting rod away from the fixed seat is located outside the furnace body and is fixedly connected to a rotating rod, and the rotating rod is used to control the fixed seat to rotate with the connection between the fixed seat and the connecting plate as the rotation center.

[0015] Furthermore, electromagnetic induction heating coils are respectively wound around the circumferential outer walls of the smelting crucible and the insulation crucible.

[0016] Furthermore, the furnace cover is provided with two observation windows, one of which is located directly above the insulation crucible, and the other is located above the insulation crucible and the smelting crucible.

[0017] Furthermore, a pressure sensor and an oxygen content detector are also provided on the furnace cover. The pressure sensor is used to detect the pressure in the smelting chamber in real time, and the oxygen content detector is used to detect the oxygen content in the smelting chamber in real time.

[0018] Furthermore, the bag dust collector includes a primary dust removal box, a secondary dust removal box connected to the primary dust removal box through a pipeline, and a tertiary dust removal box connected to the secondary dust removal box through a pipeline, and the dust removal air inlet pipe is provided on the top of the primary dust removal box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the smoke exhaust and dust removal device of the powder atomization smelting furnace of the utility model;

[0020] Figure 2 It is a schematic structural diagram of the smoke exhaust and dust removal device of the powder atomization smelting furnace of the utility model at a certain viewing angle;

[0021] Figure 3 This is a diagram of the internal structure of a smelting furnace in a smoke exhaust and dust removal device for a powder atomization smelting furnace of the utility model.

[0022] Among them, the above-mentioned drawings include the following figure marks: 1-smelting furnace; 11-furnace body; 12-furnace cover; 121-feeding port; 122-gas outlet; 123-observation window; 124-pressure sensor; 125-oxygen content detector; 13-smelting crucible; 14-insulating crucible; 15-rotating bracket; 151-connecting plate; 152-fixed seat; 153-connecting rod; 154-rotating rod; 16-electromagnetic induction heating coil; 2-gas storage bottle; 3-bag dust collector; 31-first dust removal box; 32-second dust removal box; 33-third dust removal box; 34-dust removal air inlet pipe; 41-first air inlet pipe; 411-air inlet; 42-second air inlet pipe; 51-first air outlet pipe; 52-second air outlet pipe; 61-pressure total gauge; 62-pressure regulating valve; 63-intake pressure gauge; 7-control valve.

[0023] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] See also Figures 1 to 3The smoke exhaust and dust removal device of the powder atomization smelting furnace 1 of the utility model comprises a smelting furnace 1, a gas storage bottle 2 and a bag dust collector 3. The smelting furnace 1 comprises a furnace body 11 and a furnace cover 12. The furnace body 11 and the furnace cover 12 together form a smelting chamber. A first air inlet pipe 41 that is in contact with the bottom wall of the furnace body 11 is provided in the smelting chamber. A plurality of air inlets 411 are provided on the first air inlet pipe 41. The air inlets 411 are circumferentially distributed on one side close to the bottom wall of the furnace body 11.

[0028] As an example, a melting crucible 13 and a heat-insulating crucible 14 are further provided in the melting chamber, the melting crucible 13 is rotatably arranged in the furnace body 11 through a rotating bracket 15, the heat-insulating crucible 14 is located on one side of the rotation direction of the melting crucible 13 and is fixed on the bottom wall in the furnace body 11, and the first air inlet pipe 41 is arranged in a circumferential direction of the melting crucible 13 and the heat-insulating crucible 14. As a specific example, in this embodiment, the first air inlet pipe 41 is a circular pipe, and a plurality of air inlets 411 are evenly spaced on the inner side of the circular pipe.

[0029] The rotating bracket 15 includes a connecting plate 151 fixedly mounted on the bottom wall of the furnace body 11, a fixed seat 152 rotatably connected to one end of the connecting plate 151 away from the bottom wall of the furnace body 11, and a connecting rod 153 fixedly connected to the fixed seat 152. A gap is provided between the fixed seat 152 and the bottom wall of the furnace body 11. A smelting crucible 13 is fixedly mounted on one side of the fixed seat 152 away from the bottom wall of the furnace body 11. In other words, the fixed seat 152 is suspended in the furnace body 11. As a specific example, in this embodiment, the fixed seat 152 is a U-shaped seat, and the smelting crucible 13 is fixed in a groove of the U-shaped seat. A vertical portion on one side of the U-shaped seat is rotatably connected to one end of the connecting plate 151, and a vertical portion on the other side of the U-shaped seat is fixedly connected to the connecting rod 153. One end of the connecting rod 153 away from the fixed seat 152 is located outside the furnace body 11 and is fixedly connected to a rotating rod 154, which is used to control the fixed seat 152 to rotate with the connection between the fixed seat 152 and the connecting plate 151 as the rotation center, so that the smelting crucible 13 can be tilted toward the insulation crucible 14, so that the aluminum liquid in the smelting crucible 13 can be poured into the insulation crucible 14 during the atomization of the smelting furnace 1. Furthermore, electromagnetic induction heating coils 16 are respectively wound on the circumferential outer walls of the smelting crucible 13 and the insulation crucible 14.

[0030] The gas cylinder 2 is used to store inert gas. The gas cylinder 2 is connected to the first gas inlet pipe 41 through the second gas inlet pipe 42 that penetrates the side wall of the furnace body 11, so that the inert gas in the gas cylinder 2 can enter the smelting chamber from the bottom of the furnace body 11. Furthermore, a pressure gauge 61, a pressure regulating valve 62 and an inlet pressure gauge 63 are provided in sequence at one end of the second gas inlet pipe 42 connected to the gas cylinder 2. As a specific example, in this embodiment, the inert gas stored in the gas cylinder 2 is nitrogen. The nitrogen in the gas cylinder 2 comes from an external liquid nitrogen station. The liquid nitrogen in the liquid nitrogen station is vaporized by a vaporizer and stored in the gas cylinder 2.

[0031] The furnace cover 12 is provided with a feeding port 121 and an air outlet 122 provided on one side of the feeding port 121 and connected to the feeding port 121. The dust removal air inlet pipe 34 of the bag filter 3 is connected to the air outlet 122 through the first air outlet pipe 51. Furthermore, a second air outlet pipe 52 is also provided on one side of the bottom of the furnace body 11, and the dust removal air inlet pipe 34 is connected to the smelting chamber through the second air outlet pipe 52. In some embodiments, an air guide device and a circulating water cooling device may be provided at the air outlet. The air guide device may be used to accelerate air flow, and the circulating water cooling device may prevent fine dust from agglomerating at high temperature at the air outlet after high-temperature radiation.

[0032] Furthermore, the first air outlet pipe 51 and the second air outlet pipe 52 are respectively provided with a control valve 7 . In the present embodiment, the control valve 7 is a butterfly valve.

[0033] Furthermore, two observation windows 123 are provided on the furnace cover 12 , wherein one observation window 123 is located directly above the heat-insulating crucible 14 , and the other observation window 123 is located above the heat-insulating crucible 14 and the smelting crucible 13 .

[0034] Furthermore, a pressure sensor 124 and an oxygen content detector 125 are also provided on the furnace cover 12. The pressure sensor 124 is used to detect the pressure in the smelting chamber in real time, and the oxygen content detector 125 is used to detect the oxygen content in the smelting chamber in real time.

[0035] Furthermore, the bag filter 3 includes a primary dust removal box 31, a secondary dust removal box 32 connected to the primary dust removal box 31 through a pipeline, and a tertiary dust removal box 33 connected to the secondary dust removal box 32 through a pipeline. A dust removal air inlet pipe 34 is provided on the top of the primary dust removal box.

[0036] In actual use, the working principle of the smoke exhaust and dust removal device of the powder atomization smelting furnace 1 of the utility model can be as follows: when the smelting furnace 1 is smelting the raw materials, in order to prevent the raw materials from being oxidized, it is necessary to fill the inside of the smelting furnace 1 with inert gas. Specifically, the pressure regulating valve 62 on the second air inlet pipe 42 is opened, so that the nitrogen in the gas storage bottle 2 can be transported to the first air inlet pipe 41 through the second air inlet pipe 42, and flow out from the multiple air inlets 411 on the first air inlet pipe 41 to the smelting chamber. At the same time, the control valve 62 on the first air outlet pipe 51 is opened. The valve 7 is controlled, and the bag filter 3 is started to form a connected gas path between the gas storage cylinder 2, the smelting furnace 1 and the bag filter 3. Subsequently, the pressure in the smelting chamber is detected by the pressure sensor 124 on the furnace cover 12, and the oxygen content in the smelting chamber is detected by the oxygen content detector 125 on the furnace cover 12. When the pressure in the smelting chamber is stabilized at a certain pressure value and the oxygen content drops to a certain value, the control valve 7 on the first gas outlet pipe 51 and the pressure regulating valve 62 on the second gas inlet pipe 42 are closed in sequence, so that the smelting chamber is in a certain oxygen-free state.

[0037] When a large amount of smoke is generated during the atomization process of the smelting furnace 1, the bag filter 3, the first air outlet pipe 51, the control valve 7 on the second air outlet pipe 52 and the pressure regulating valve 62 on the second air inlet pipe 42 are opened in sequence, and the nitrogen in the gas storage bottle 2 will flow out from the air inlet 411 on the first air inlet pipe 41 at the bottom of the smelting furnace 1 and gradually diffuse and flow into the first air outlet pipe 51 and the second air outlet pipe 52 connected to the smelting furnace 1. In this process, the pressure sensor 124 and the oxygen content detector 125 are observed to ensure that there is a certain pressure and oxygen content in the smelting furnace 1 to ensure that the smelting atomization process can be carried out normally in the smelting furnace 1, and the smoke can be discharged from the first air outlet pipe 51 and the second air outlet pipe 52 to the bag filter 3 for dust removal along with the flow of nitrogen, thereby solving the problem that dust cannot be discharged during the smelting process and remains in the smelting furnace 1.

[0038] In summary, the beneficial effects of the smoke exhaust and dust removal device of the powder atomization smelting furnace of the utility model are: by arranging a gas storage bottle and a bag dust collector, inert gas is stored in the gas storage bottle, the bottom of the smelting furnace is connected to the gas storage bottle through the first air inlet pipe and the second air inlet pipe, and the top of the smelting furnace is connected to the bag dust collector through the first air outlet pipe, so that a gas flow channel is formed among the gas storage bottle, the smelting furnace and the bag dust collector. In actual use, the oxygen content in the smelting furnace is controlled by filling the smelting furnace with inert gas to effectively ensure the normal smelting atomization process in the smelting furnace, and a large amount of smoke generated in the atomization process of the smelting furnace is discharged into the bag dust collector for dust removal through the flow of the inert gas in the above-mentioned gas flow channel, thereby avoiding the obstruction of vision caused by the smoke adhering to the observation window, and the employees can observe the smelting situation in the smelting furnace in real time, and reduce the residual smoke in the smelting furnace, thereby ensuring the health of the employees during the loading or cleaning of the smelting furnace.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A smoke exhaust and dust removal device for a powder atomization smelting furnace, characterized in that: include: A smelting furnace, a gas storage bottle and a bag dust collector, wherein the smelting furnace comprises a furnace body and a furnace cover, wherein the furnace body and the furnace cover together form a smelting chamber, wherein a first air inlet pipe in contact with the bottom wall of the furnace body is provided in the smelting chamber, wherein a plurality of air inlets are provided on the first air inlet pipe, and the air inlets are circumferentially distributed on one side close to the bottom wall of the furnace body; The gas storage bottle is used to store inert gas, and the gas storage bottle is connected with the first gas inlet pipe through the second gas inlet pipe penetrating the side wall of the furnace body, so that the inert gas can enter the smelting chamber from the bottom of the furnace body; The furnace cover is provided with a feeding port and an air outlet which is arranged at one side of the feeding port and is connected with the feeding port. The dust removal air inlet pipe of the bag filter is connected with the air outlet through a first air outlet pipe.

2. The smoke exhaust and dust removal device for a powder atomization smelting furnace according to claim 1, characterized in that: The end of the second air inlet pipe connected to the gas storage bottle is provided with a total pressure gauge, a pressure regulating valve and an air inlet pressure gauge in sequence.

3. The smoke exhaust and dust removal device for a powder atomization smelting furnace according to claim 1, characterized in that: A second air outlet pipe is also provided on one side of the bottom of the furnace body, and the dust removal air inlet pipe is connected with the smelting chamber through the second air outlet pipe.

4. The smoke exhaust and dust removal device for a powder atomization smelting furnace according to claim 3 is characterized in that: The first air outlet pipe and the second air outlet pipe are respectively provided with control valves.

5. The smoke exhaust and dust removal device for a powder atomization smelting furnace according to claim 1, characterized in that: A smelting crucible and a heat-insulating crucible are also provided in the smelting chamber. The smelting crucible is rotatably arranged in the furnace body through a rotating bracket. The heat-insulating crucible is located on one side of the rotation direction of the smelting crucible and is fixed on the bottom wall in the furnace body. The first air inlet pipe is arranged in a ring on the circumference of the smelting crucible and the heat-insulating crucible.

6. The smoke exhaust and dust removal device for a powder atomization smelting furnace according to claim 5, characterized in that: The rotating bracket includes a connecting plate fixedly mounted on the bottom wall of the furnace body, a fixing seat rotatably connected to one end of the connecting plate away from the bottom wall of the furnace body, and a connecting rod fixedly connected to the fixing seat, a gap is provided between the fixing seat and the bottom wall of the furnace body, and the smelting crucible is fixedly provided on the side of the fixing seat away from the bottom wall of the furnace body, one end of the connecting rod away from the fixing seat is located outside the furnace body and is fixedly connected to a rotating rod, and the rotating rod is used to control the fixing seat to rotate with the connection between the fixing seat and the connecting plate as the rotation center.

7. The smoke exhaust and dust removal device for a powder atomization smelting furnace according to claim 5, characterized in that: Electromagnetic induction heating coils are respectively wound around the circumferential outer walls of the smelting crucible and the heat-insulating crucible.

8. The smoke exhaust and dust removal device for a powder atomization smelting furnace according to claim 5, characterized in that: The furnace cover is also provided with two observation windows, one of which is located directly above the insulation crucible, and the other is located above the insulation crucible and the smelting crucible.

9. The smoke exhaust and dust removal device for a powder atomization smelting furnace according to claim 1, characterized in that: The furnace cover is also provided with a pressure sensor and an oxygen content detector. The pressure sensor is used to detect the pressure in the smelting chamber in real time, and the oxygen content detector is used to detect the oxygen content in the smelting chamber in real time.

10. The smoke exhaust and dust removal device for a powder atomization smelting furnace according to claim 1, characterized in that: The bag dust collector includes a primary dust removal box, a secondary dust removal box connected to the primary dust removal box through a pipeline, and a tertiary dust removal box connected to the secondary dust removal box through a pipeline. The dust removal air inlet pipe is provided on the top of the primary dust removal box.

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