KR100706102B1 - Apparatus for manufacturing al powder - Google Patents

Abstract

The present invention relates to an aluminum powder manufacturing apparatus, and aims to produce solid aluminum as a spherical powder and to sort the produced powder by size by a series of automated processes.

Aluminum powder manufacturing apparatus according to the present invention, the melting tank 10 for melting a solid metal; A spray tank 20 for spraying gas supplied from the liquid metal melted in the melting tank and the gas injection means 40; A main tank 30 for changing the liquid metal sprayed from the spray tank into a spherical powder; A cyclone (50) communicating with the inside of the main tank to remove fine powder in the main tank; Cooling means (70) for maintaining an internal temperature of the main tank; And a sorting means 60 for sorting the phase-change powder in the main tank by size, wherein the sorting means is disposed at the discharge end of the main tank to convey the metal powder discharged from the main tank. 61, a hopper 62 receiving metal powder from the conveying conveyor, and a sorting screen 63, 64, 65 formed in series from the hopper and sorting metal powders of different sizes.

Metal, powder, gas, screening

Description

Aluminum powder manufacturing equipment {APPARATUS FOR MANUFACTURING AL POWDER}

1 is a block diagram of an aluminum powder production apparatus according to the present invention.

2 and 3 are respectively a longitudinal sectional view and an exploded perspective view of the spray tank applied to the aluminum powder production apparatus according to the present invention.

Figure 4 is another illustration of the aluminum powder production apparatus according to the present invention.

<Description of Signs for Main Parts of Drawings>

10: melt tank, 11,71: pump

20: spray tank, 21: outer tank

22: insulation, 23: storage tank

24: heater, 25: spray nozzle

26: flow pipe, 30: main tank

31 outlet, 32 tapered portion

33: cooling water passage, 40: gas injection means

50: cyclone, 60: selection means

61 transfer conveyor, 62 hopper

63,64,65: sorting screen, 70: cooling means

80: vertical improvement means,

The present invention relates to an aluminum powder manufacturing apparatus, and more particularly, to produce an aluminum metal as a spherical powder, and to be able to quickly and simply select the produced powder by size, aluminum powder to improve the granularity of the powder It relates to a manufacturing apparatus.

When metals are classified into materials with low melting points such as zinc, aluminum, tin, etc. and metals with high melting points such as stainless steel, iron, copper, nickel, and cobalt, depending on the melting temperature, low melting point metal powders are used in many domestic companies. Is researching and producing high melting point materials, but they are only studying due to immaturity of related technologies such as nozzle design technology.

In particular, stainless steel, copper, nickel, aluminum, zinc, tin and their alloy metals are metals with high melting point and are used for various applications as the basic materials of industry. Most of these powders are manufactured by water-atomizing method. It is produced by a manufacturing method, such as irregular powder and spherical powder produced by a gas atomization (Gas-Atomizing) method. Although it has the advantage of fast cooling speed by water yarn and simple manufacturing equipment, it is known to be difficult to use in applications where the processability is important because of irregularities in addition to the disadvantages of drying water and reducing it as necessary. There are gas spraying and centrifugal spraying methods for atomizing, but centrifugal spraying has limitations in minimizing productivity and particle size. On the other hand, the gas spraying method can produce particles of various sizes according to the gas used, the shape of the nozzle, the gas pressure, etc., and is known to be excellent in workability because it is spherical by surface tension during the plane cooling after spraying the droplets.

The spherical high melting point alloy powder produced by gas spraying has excellent corrosion resistance, oxidation resistance, mechanical properties, and marketability, and is molded by methods such as powder metallurgy (PM), metal injection molding (MIM), and hot forming process (HIP). It is being applied to a product and the demand continues to increase. In addition, almost all of the gas atomized powders used in the country depend on imports.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an aluminum powder manufacturing apparatus capable of manufacturing aluminum metal into spherical powders and quickly and simply selecting the produced powders by size.

In addition, another object of the present invention is to be able to improve the particle shape of the powder into a spherical shape.

Aluminum powder manufacturing apparatus according to the present invention for achieving the above object, the melting tank for melting a solid metal; A spray tank for spraying gas supplied from the liquid metal melted in the melting tank and gas injection means; A main tank for changing the liquid metal sprayed from the spray tank into a spherical powder; A cyclone communicating with the inside of the main tank to remove fine powder in the main tank; Cooling means for maintaining an internal temperature of the main tank; And, the sorting means for sorting the phase-change powder in the main tank by size,

The sorting means is disposed in the discharge end of the main tank conveying conveyor for transporting the metal powder discharged from the main tank, a hopper receiving the metal powder from the conveying conveyor, is formed in series from the hopper and different sizes The sorting hole is provided with a plurality of sorting screen for sorting the metal powder of different sizes and characterized in that it comprises a high-pressure sprayer for high-pressure spraying air on the sorting screen.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

As shown in FIG. 1, the apparatus for producing aluminum powder according to the present invention includes a metal (aluminum) melting tank 10, a spray tank 20 for spraying a liquid metal melted from the melting tank 10, and spraying the same. The main tank 30 which phase-changes the liquid metal sprayed from the tank 20 into spherical powder, and the gas injection means 40 which powders the liquid metal sprayed from the spray tank by injecting gas into the main tank 30. ), A cyclone (50) for communicating with the inside of the main tank (30) to remove the fine powder in the main tank (30), and a sorting means (60) for sorting the phase-change powder in the main tank (30) by size. do.

The metal melting tank 10 has a metal (solid state) stored therein and melts the metal in the solid state by a heat source, and supplies the molten liquid metal to the spray tank 20 by the pump 11.

2 and 3, the spray tank 20 is the outer tank 21, the heat insulating material 22 is coupled to the outer tank 21, the storage tank is coupled to the inside of the heat insulating material 22 and stores the liquid metal ( 23) and the liquid metal is supplied from the heater 24 and the storage tank 23 to heat the liquid metal in the storage tank 23 to maintain the liquid phase in the heat insulating material 22 and the inside of the main tank 30. It consists of the injection nozzle 25 which injects.

The outer tank 21, the heat insulating material 22 and the storage tank 23 are separated from each other to facilitate maintenance, the specific structure of each tank is as follows.

The outer tank 21 protects the heat insulator 22 and the storage tank 23 and is mounted on the main tank 30 so that the liquid metal stored in the storage tank 23 does not phase change by external heat. It is made of a material having a low thermal conductivity, and the outward flange 21a at the bottom is fixed to the main tank 30 through fasteners (bolts, etc.), and an inner circumferential surface of the support jaw supporting the heat insulator 22 from the bottom ( 21b). The support jaw 21b may be formed in an annular shape on the inner circumferential surface of the outer tank 21.

Insulation material 22 is made of a material (for example, styrofoam, urethane foam, etc.) to block the heat transfer so that the liquid metal stored in the storage tank 23 is not affected by the external heat, the storage tank 23 to the circumference and the bottom It is a wrapping structure and may be provided with a flow pipe 26 connecting the storage tank 23 and the spray nozzle 25.

The storage tank 23 is formed to be narrow in diameter toward the bottom so that the liquid is not sprayed at the same time while the top is open cylindrical.

The heater 24 is to heat the liquid metal stored in the storage tank 23 not to be cooled, and a heating coil or the like may be used to generate heat by applying electricity.

The outer tank 21, the heat insulating material 22 and the storage tank 23 are each connected in a structure that is fitted in turn from the top can be selectively separated and maintained if necessary.

The spray nozzle 25 is connected to the flow pipe 26 to spray the liquid metal and gas supplied through the storage tank 23-the flow pipe 26 and the gas spray pipe 43 to be described later into the main tank 30. do.

The gas spray pipe 43 of the gas spray means 40 is connected to the flow pipe 26 so that fluid communication is possible, and the liquid metal of the storage tank 23 and the gas of the gas tank 41 are supplied to the spray nozzle 25 together. do.

The main tank 30 is a chamber which allows the liquid metal sprayed from the spray nozzle 25 to be phase-changed into powder. The main tank 30 is generally cylindrical and gradually toward the outlet 31 toward the outlet 31 so that the phase-changed powder is not temporarily discharged. A narrow taper portion 32 is formed. On the other hand, the powdering of the liquid metal has a close relationship with the temperature inside the main tank 30, that is, the temperature inside the main tank 30 is not limited to a certain temperature (temperature that is not powdered). If it is exceeded, the powdering does not proceed so that the cooling means 70 for maintaining the temperature inside the main tank 30 at an appropriate temperature (powderable temperature) is further provided. The main tank 30 has a dual structure to have a cooling water path 33, and the cooling means 70 includes a cooling water tank 71, a cooler (not shown) for cooling the cooling water in the cooling water tank 71, and a cooling water tank ( A pump 72 for pumping the coolant in the 71 and a coolant circulation pipe 73 for circulating the coolant in the coolant tank 71 to the coolant path 33 of the main tank 30.

As shown in FIG. 1, the gas spraying means 40 includes a gas tank 41, a pump 42 for pumping gas in the gas tank 41, and a gas supplied by pumping the pump 42. It consists of the gas spray pipe 43 supplied to it.

The cyclone 50 collects fine powder scattered inside the main tank 30, and thus the detailed description thereof will be omitted.

Separation means 60 is to sort the metal powder discharged from the outlet 31 of the main tank 30 by size through a continuous process, thereby, the present invention automates the entire process from the production of metal powder to sorting will be.

The sorting means 60 is installed at the lower portion of the outlet 31 of the main tank 30 (the inclined upward toward the discharge end to distribute the metal powder evenly), the discharge conveyor 61, the discharge end of the transfer conveyor 61 Multi-stage sorting screen disposed in the hopper 62 and the discharge end of the hopper 62 to collect the metal powder falling from the conveying conveyor 61 is arranged in multiple stages to sort the metal powder in different sizes (63, 64, 65) (shown as three in the figure). That is, when three sorting screens 63, 64, and 65 are used, metal powders of four different sizes can be obtained.

The sizes of the holes of the first to third sorting screens 63, 64, and 65 are formed in the order of the first sorting screen 63> the second sorting screen 64> the third sorting screen 65. Since the screen 63 may vary according to a user's selection, the screen 63 is not limited to any one value.

When the metal powder is sorted by the first to third sorting screens 63, 64 and 65, the pores of the sorting screens 63, 64 and 65 may be blocked by some metal powder, and the clogging of the pores may result in sorting efficiency. In order to prevent this, the high pressure jets 63a, 64a, and 65a may be further included to spray the high pressure jets to the screens 63, 64 and 65.

The operation of the aluminum powder production apparatus according to the present invention configured as described above is as follows.

The liquid metal melted in the melting tank 10 is moved to the spray tank 30 by the pumping of the pump 11 and temporarily stored. The metal is temporarily stored here to control the spray amount.

The heater 24 is operated so as not to phase-change into a solid while the metal is stored in the spray tank 30, and the high temperature heat generated by the heater 24 is stored by the heat insulator 22 without heat loss to the outside. It is delivered to 23) to keep the metal stored in the storage tank 23 in the liquid phase.

The metal stored in the storage tank 23 is sprayed into the main tank 30 together with the gas flowing through the gas spray pipe 43 through the spray nozzle 25, and spherical solids while flying the main tank 30. Phase change to powder, the phase change of the liquid metal is the same as in the prior art, the detailed description thereof will be omitted.

Cooling water cooled by the cooling means 70 circulates through the cooling water passage 33 of the main tank 30 while powdering is performed in the main tank 30, so that the internal temperature of the main tank 30 is appropriate for powdering. By maintaining the temperature, all the sprayed liquid metal inside the main tank 30 can be phase changed into a powder.

The metal powder phase-changed in the main tank 30 is collected in the hopper 62 along the conveying conveyor 61 and then fed (free fall) to the first screen 63. Among the metal powders fed to the first sorting screen 63, a metal powder having a predetermined size or more (larger than the sorting hole) is selected, and a metal powder having a size smaller than that is fed to a second sorting screen 64 and then metal. Among the powders, the metal powder having a predetermined size or more (larger size than the selection hole) is selected and the metal powder having a size smaller than that is supplied to the third sorting screen 65 to have the same effect as the first and second sorting screens 63 and 64. Are screened into metal powders of different sizes. That is, the metal powder produced in the main tank 30 can be sorted into products of different sizes through the above sorting process, and through the size of the sorting hole of the sorting screen, the user can provide products of any size. .

On the other hand, the spray tank 20 requires maintenance according to the temperature in the storage tank 23, etc., the storage tank 23, the heat insulating material 22 when the clogging of the storage tank 23 or the adhesion of the liquid metal occurs, etc. ) And the outer tank (21) separately to wash or repair, and only replace the corresponding tank if necessary to replace.

The apparatus for manufacturing aluminum powder according to the present invention is installed between the conveying conveyor 61 and the hopper 62 as shown in FIG. 4 to improve the shape by colliding the metal powder conveyed by the conveying conveyor 61 ( 80) may be further included.

The vertical improvement means 80 is a tank 81 having a hollow inside and having an inlet and an outlet at upper and lower portions thereof, and a rotor 82 and a tank 81 rotatably mounted inside the tank 81 to rotate metal powder. And a screen 83 for separating the metal powder and the fine powder falling in the tank 81 inside the tank 81.

The rotor 82 rotates the metal powder conveyed by the conveying conveyor 61 while rotating with the driving motor 82a as a driving force to force the metal powders to collide with each other or to collide with the inner wall surface of the tank 81 so that the metal powder is rotated. The metal powder is manufactured into a spherical shape by removing each part of the metal powder.

The screen 83 sorts the fine powder generated due to the collision between the metal powders and the like in the tank 81 with the metal powder, so that only the sorted metal powder is supplied to the hopper 62.

As described above, according to the aluminum powder manufacturing apparatus according to the present invention, it is possible to increase the productivity by producing the liquid aluminum powder as a spherical powder and by sorting the powder by size through a series of automated processes.

And, by removing the angled portion on the surface of the powder produced to improve the granular shape of the powder to have the effect of improving the reliability and marketability of the product.

While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described. Rather, it will be apparent to those skilled in the art that many changes and modifications to the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (4)

delete A melting tank for melting the solid metal; A spray tank for spraying gas supplied from the liquid metal melted in the melting tank and gas injection means; A main tank having a dual structure which phase-changes the liquid metal sprayed from the spray tank into spherical powder and has a cooling water passage therein; A cyclone communicating with the inside of the main tank to remove fine powder in the main tank; Coolant to maintain the internal temperature of the main tank consisting of a cooler, a pump for pumping the coolant cooled by the cooler, and a cooling water circulation pipe connected to the cooling water passage of the pump and the main tank to circulate the cooling water to the cooling water passage. Sweets; And a sorting means for sorting the phase-change powder in the main tank by size, wherein the sorting means is disposed at a discharge end of the main tank to convey metal powder discharged from the main tank. A hopper receiving metal powder from a conveyor, a plurality of sorting screens formed in a chain from the hopper and having different sized sorting holes for sorting metal powders of different sizes, and a high pressure jet spraying air on the sorting screen. In the aluminum powder manufacturing apparatus consisting of, The spray tank is an outer tank, a heat insulating material coupled to the inside of the outer tank, a storage tank coupled to the inside of the heat insulating material, and stores the liquid metal, is mounted inside the heat insulating material and the heat stored in the storage tank to maintain the liquid metal Apparatus for producing aluminum powder, characterized in that consisting of a heating nozzle and a spray nozzle receiving the liquid metal from the storage tank and spraying the inside of the main tank. delete 3. A tank according to claim 2, wherein the tank comprises a hollow having an inlet and an outlet and receives metal powder from a conveying conveyor of the sorting means, and is rotatably mounted inside the tank to collide with each other by rotating the metal powder supplied to the tank. And a rotor for forming a spherical shape by removing a square portion, and a shape improvement means including a screen mounted on an outlet side of the tank to screen metal powder and fine powder discharged from the tank. Aluminum powder making machine.

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