KR100419821B1 - Method for manufacturing metal fiber filter and apparatus for withdrawaling the metal fiber - Google Patents

Abstract

The present invention relates to a method for producing a porous metal fiber sintered body and a metal fiber recovery apparatus, wherein the method for producing a metal fiber sintered body is generated in a steel mill to collect metal fiber waste (100) mixed with metal fibers, abrasive oil and abrasive powder. Metal fiber waste collection step (S1); Polishing oil evaporation step (S3) of evaporating the included abrasive oil by heating the metal fiber waste; A metal fiber separation step (S4) of separating the metal fiber waste from which the abrasive oil is evaporated into a metal fiber and abrasive powder by a magnetic separator (20) (50); A metal fiber capturing step (S5) of collecting the metal fibers by size using the mesh net unit 60 in which the separated metal fibers have a mesh of a predetermined size; It comprises a metal fiber collecting step (S5) for collecting the metal fibers by size using the formed grommet unit (60). The metal fiber recovery apparatus includes a pulverizer 10 for pulverizing the lump-shaped metal fiber waste 100; A spiral path provided between the inlet port 31 through which the metal fiber waste flows through the grinder 10 and the outlet port 32 through which the metal fiber waste flows out, and the inlet port 31 and the outlet port 32 therein. A vibration dryer (30) installed at the bottom thereof, the vibrator (34) generating vibration and a heating device (35) for heating, thereby removing the abrasive oil from the metal fiber waste; A magnet separator 50 for separating metal fibers and metal powder from metal fiber waste flowing out from the outlet 32; And at least one grommet unit 60 for collecting the metal fibers separated by the magnet separator 50 in size.

Description

Method for manufacturing porous metal fiber sintered body and its metal fiber recovery apparatus {Method for manufacturing metal fiber filter and apparatus for withdrawaling the metal fiber}

The present invention relates to a manufacturing method for producing a porous metal fiber sintered body from the metal fibers recovered from metal waste, and a recovery apparatus for recovering the metal fibers.

Metal fiber sintered bodies, such as metal filters, are used for various purposes as they contain many pores per se, and have many different characteristics from general metal bodies. If some of these characteristics are listed, it has very good noise attenuation compared with a general metal body, and excellent filtration ability even at high temperature. In addition, it is applied not only to an electrode but also for electromagnetic wave shielding.

The metal fibers used in the metal fiber sintered body as described above are very thin and have a predetermined length. As a method of manufacturing such a metal fiber, a method of cutting out a metal body drawn by a predetermined length after bundling a plurality of metal wires together and drawing it, or by mechanical turning, has been proposed.

However, since the amount of the metal fiber obtained by the above method is not large, it caused the price of the product using the metal fiber, for example, the metal fiber sintered body, to increase.

The present invention has been created to solve the above problems, by using a metal fiber recovered from the waste metal fiber waste can reduce environmental pollution, manufacturing a porous metal fiber sintered body that can produce a large amount at a lower cost It is an object to provide a method and a metal fiber recovery apparatus thereof.

1 is a view showing the metal fiber waste collected in a lump shape;

2 is a block diagram of a metal fiber recovery apparatus according to the present invention,

3 is a partial cutaway cross-sectional view of the vibration dryer of FIG.

4 is a side view of the magnet separator of FIG. 2;

5 is a view showing a state in which the metal fiber is contained in the molding die,

6 is a perspective view of a metal fiber sintered body composed of metal fibers,

7 is a flow chart showing a method of manufacturing a metal fiber

<Description of Signs of Major Parts of Drawings>

10 ... grinder 11,12 ... roller

13 ... Hopper 20 ... Magnet Separator

30 ... vibration dryer 31 ... inlet

32 ... outlet 33 ... spiral path

34 ... Vibrators 35 ... Heating

36 ... heating air supply unit 37 ... steam supply unit

38 ... cooling unit 40 ... vibration transfer unit

50 ... Magnet Separator 51 ... Magnet Controller

52 ... driven roller 53 ... belt

54 ... Polishing powder collection unit 60 ... Gem net unit

100 ... metal fiber waste 100a ... metal fiber

100b ... abrasive powder 110 ... metal fiber sintered body

120 ... Mold

In order to achieve the above object, the method for producing a porous metal fiber sintered body according to the present invention, the metal fiber waste collection step for collecting the metal fiber waste 100, which is generated in a steel mill and mixed with metal fiber, abrasive oil, abrasive powder (S1); Polishing oil evaporation step (S3) of evaporating the included abrasive oil by heating the metal fiber waste; A metal fiber separation step (S4) of separating the metal fiber waste from which the abrasive oil is evaporated into a metal fiber and abrasive powder by a magnetic separator (20) (50); A metal fiber capturing step (S5) of collecting the metal fibers by size using the mesh net unit 60 in which the separated metal fibers have a mesh of a predetermined size; A metal fiber molding step (S6) of molding the collected metal fibers into a predetermined shape; Metal fiber sintering step (S7) for sintering the formed metal fiber; And a surface leveling step (S8) of pressing the sintered metal fiber sintered body to make the surface flat.

In the present invention, the metal fiber waste further comprises a metal fiber waste crushing step (S2) of finely pulverizing by passing between the rollers (11) (12).

In order to achieve the above object, the metal fiber recovery apparatus according to the present invention, the pulverizer 10 for pulverizing the lump-shaped metal fiber waste (100); A spiral path provided between the inlet port 31 through which the metal fiber waste flows through the grinder 10 and the outlet port 32 through which the metal fiber waste flows out, and the inlet port 31 and the outlet port 32 therein. A vibration dryer (30) installed at the bottom thereof, the vibrator (34) generating vibration and a heating device (35) for heating, thereby removing the abrasive oil from the metal fiber waste; A magnet separator 50 for separating metal fibers and metal powder from metal fiber waste flowing out from the outlet 32; At least one grommet unit 60 for collecting the metal fibers separated by the magnet separator 50 in size; And a cooling unit 38 connected to the vibrating dryer 30 to cool the liquefied abrasive oil and recover the liquid by liquefying.

In addition, the vibration transfer unit 40 is installed between the vibration dryer 20 and the magnet separator 50 to transfer the metal fiber waste in the direction of the magnet separator 50 and at the same time to weaken the coupling force between the metal fiber and the abrasive powder. It further includes.

Next, with reference to the accompanying drawings will be described in detail a preferred embodiment of a method for producing a porous metal fiber sintering agent and a recovery apparatus for recovering the metal fiber.

1 is a view showing the metal fiber waste collected in a lump shape, Figure 2 is a block diagram of a metal fiber recovery apparatus according to the present invention, Figure 3 is a partial cutaway cross-sectional view of the vibration dryer of Figure 2, Figure 4 It is a side view of the magnet separator of FIG.

Referring to the drawings, a pulverizer 10 for crushing the lump-shaped metal fiber waste 100, a vibration dryer 30 for removing organic matter from the pulverized metal fiber waste 100, and a vibration dryer 30 And a magnetic separator (50) for separating the metal fibers and abrasive powder from the metal fiber waste. It includes a mesh net unit 60 for collecting the metal fibers by size. At this time, a magnet separator 20 for separating metal fibers and abrasive powder is installed between the pulverizer 10 and the vibration dryer 30, and metal fiber waste is disposed between the vibration dryer 20 and the magnet separator 50. It is preferable that the vibration transfer unit 40 is installed in the 50 direction to weaken the bonding force between the metal fiber and the abrasive powder.

The mill 10 includes two rollers 11 and 12 installed therein and a hopper 13 for guiding the metal fiber waste 100 to the rollers 11 and 12. The lump-shaped metal fiber waste 100 introduced through the hopper 13 is pulverized finely while passing between the rollers 11 and 12. Since metal fiber waste is usually collected in a lump form, metal fiber waste must be pulverized to process it.

As shown in FIGS. 2 and 3, the vibration dryer 30 includes an inlet 31 formed at a lower end of the finely ground metal fiber waste 100 and a metal fiber waste 100 from which abrasive oil is evaporated. It has an outlet and has an outlet 32 formed at the top. Inside the vibration dryer 30 between the inlet 31 and the outlet 32, a spiral path 33 for moving the metal fiber waste upwards is installed. The spiral path 33 is a path formed by forming a spiral in the vibration dryer 30. The vibrator 34 generating vibrations is installed below the vibration dryer 30. The vibration dryer 30 is provided with a heating device 25 for heating the interior of the vibration dryer (30). Here, the heating device 35 includes a heating air supply unit 36 for supplying heated air into the vibration dryer 30 and a steam supply unit 37 for supplying steam. Since steam is introduced into the vibration dryer 30 and then heated by the heated air, the heated steam heats the vibration dryer more efficiently. However, as long as the inside of the vibration dryer 30 is heated, other members such as a heater may be used. Then, the vibration dryer 30 is connected to the cooling unit 38 to cool the outflowing abrasive oil vapor. The cooling unit 38, which is cooled by external cold air or cooling water, can be recovered by liquefying the incoming abrasive oil vapor.

The vibrating transfer unit 40 is provided with a vibrator 41 so as to vibrate itself, the metal fiber waste is transferred to the magnet separator 50 while vibrating. Metal fiber and abrasive powder of metal fiber waste are weakened in the process of conveying. However, the vibration transfer unit 40 may be implemented by employing a belt or a roller. Since the vacuum transfer unit is a well-known technique, further detailed description thereof will be omitted.

Referring to the 50 magnet separator of the magnet separator 20, 50 as an example, as shown in Figure 4, a plurality of magnet controller 51 and the driving roller 52, the magnet controller 51 and the driving roller ( 52, a belt 53 wound up. The metal fiber waste conveyed through the vibration transfer unit 40 is arrow-moved by the belt 53. The metal fiber 100a containing the magnetic component is attached to the belt 53 by the magnetic force of the magnet controller 51. It is conveyed to the mesh net unit 60 in the state in which it was made, while the abrasive powder 100b is collected by the inertia from the tip of the belt 53 by falling to the abrasive powder collecting portion 54. As a result, the metal fiber 100a and the abrasive powder 100b are separated from each other. Since the same configuration as the magnet separator 50 described above is well known, further detailed description thereof will be omitted.

The mesh net unit 60 has a mesh net 60a having a mesh of a predetermined size, and the size of the metal fiber 100a to be collected is determined by the size of the mesh. At this time, the net mesh unit 60 is preferably vibrated by a vibrator (not shown) therein, in order to perform the collection more effectively.

Next, the manufacturing method of manufacturing a porous metal fiber sintered body is demonstrated.

7 is a flowchart illustrating a method of manufacturing metal fibers.

First, in order to recover the metal fibers from the metal fiber waste, first to collect the waste grinding iron of the steel mill, that is, the metal fiber waste collection to collect the metal fiber waste 100 (see Fig. 1) mixed with metal fiber, abrasive oil, abrasive powder Perform step S1. In order to manufacture a metal plate (not shown) in a steel mill, abrasive stone grinds a surface, supplying abrasive oil to a metal plate surface normally. In this process, metal fibers (metal powder) are produced as by-products, the total amount of which is thousands of tons per year, which are discarded as waste. Since such metal fiber waste is mixed with abrasive oil and abrasive powder which are not naturally decomposed in nature, it causes environmental pollution. The present invention can be used not only as a raw material for making the metal fiber sintered body by collecting the metal fiber waste, but also to recover and recycle the abrasive oil from the metal fiber waste (100). In the metal fiber waste collection step (S1), the metal fiber waste is collected without discarding.

Next, the metal fiber waste crushing step (S2) of grinding the collected metal fiber waste is performed. Metal fiber waste crushing step (S2) is a step in which the metal fiber waste through the hopper 13 is passed between the rollers (11) 12 as shown in FIG. The finely ground metal fiber waste is transferred to the 20 magnet separator. In this process, a part of the abrasive powder is collected in the abrasive powder collecting unit 21 by the same action as the 50 magnet separator, and the remaining metal fiber waste is the vibration dryer. Are transferred to 30.

Next, the pulverized metal fiber waste is introduced into the vibrating dryer 30 heated inside, and the polishing oil evaporation step S3 is performed to evaporate the polishing oil. At this time, the vibrator 34 vibrates the vibration dryer 30 in order to promote the evaporation of the abrasive oil, the heating air supply unit 36 of the heating device 35 supplies the heated air to the vibration dryer 30, The steam supply unit 37 supplies steam.

The metal fiber waste introduced into the inlet 31 moves to the upper end along the spiral path 33 as the vibration dryer 30 vibrates, in which the abrasive oil is evaporated. The evaporated abrasive oil is transferred to a cooling system 38 cooled by cooling water or external cold air through an evaporation pipe, and then liquefied and recovered in the cooling system 38. Since the abrasive oil is liquefied after evaporation, it does not contain impurities and can be recycled back to the abrasive oil. Then, in the course of the vibration dryer 30 is vibrated, some of the abrasive included in the metal fiber waste is separated, which sinks below the vibration dryer 30 and is later removed.

The metal fiber waste from which the abrasive oil is removed is transferred to the vibration transfer unit 40 through the outlet 32 connected to the upper end of the spiral path 33. The vibration transfer unit 40 is vibrated, thereby weakening the bonding force between the metal fiber and the abrasive powder and simultaneously transferring the vibration to the magnet separator 50.

Next, the magnet separator 50 performs a metal fiber separation step (S4) for separating the metal fiber and the abrasive powder from the metal fiber waste. The metal fiber 100a and the abrasive powder 100b transferred to the magnet separator 50 are moved by the belt 53, and the metal fiber 100a containing the magnetic component is moved by the magnetic force of the magnet controller 51. It is transferred to the mesh net unit 60 in a state of being attached to the belt 53, and the abrasive powder 100b is recovered from the tip of the belt 53 by the inertia to be collected by the abrasive powder collector 54, thereby recovering the metallic fiber 100a. ) And the abrasive powder (100b) are separated from each other.

Next, a metal fiber collecting step (S5) of separating and collecting the separated metal fibers by size using the mesh network unit 60 is performed. Since the mesh net unit 60 has a mesh of a predetermined size, the size of the metal fiber 100a to be collected is determined by the size of the mesh. At this time, the grommet unit 60 is vibrated by the vibrator (not shown) therein to perform the collection more effectively. Metal fiber collected in the metal fiber collecting step (S5) is a state of pure metal fiber, since the abrasive powder and abrasive oil is completely removed. If a plurality of mesh net units having different mesh sizes are used, metal fibers of different sizes may be collected.

5 is a view showing a state in which the metal fiber is contained in a molding mold, Figure 6 is a perspective view of a metal fiber sintered body composed of metal fibers.

The metal fiber forming step (S6) for molding the metal fibers collected in the above manner to a predetermined shape is performed. In the metal fiber forming step (S6), the metal fiber 100a classified into a predetermined size is placed on a molding die (or a metal mesh) 120 as shown in FIG. 5 to be formed into a plate shape or a required shape.

Next, the metal fiber sintered step (S7) for sintering the molded metal fiber is performed to produce a metal fiber sintered body. Here, it is preferable that the temperature for sintering is 1000 to 1550 degreeC. If the temperature is less than 1000 ° C., the sintering is generally not performed. If the temperature is more than 1550 ° C., the metal fiber is sintered while the original shape is deformed.

Then, by pressing the sintered metal fiber sintered body to perform a surface leveling step (S8) to make the surface flat. The surface flattening step S8 may be implemented by passing the sintered metal fiber sintered body between two rollers (not shown), and may be implemented by placing a sintered metal fiber sintered body into a predetermined mold body (not shown) and pressing the surface with a flat plate (not shown). It may be. At this time, since the density or porosity of the metal fiber sintered body may vary depending on the pressing conditions, the metal fiber sintered body 110 as shown in FIG. 6 is completed in the flattening process to an appropriate value. At this time, although the density and the porosity of a sintered compact vary according to the conditions to pressurize, it is preferable to set the density to 0.7-6.0 g / cc and the porosity to about 30 to 90%.

The porous metal fiber sintered body 110 manufactured by the above process has the following characteristics.

First: It is made of all metal, so it is excellent in high temperature and oxidation resistance and resistant to thermal shock. Second: It is a pore body made of fine metal fibers, so it has higher surface area than any metal structure. Third: It has high porosity and low density. Can be made higher.

Industrial uses of the metal fiber sintered body produced by the above process is as follows.

1) Sound-absorbing material-It is very effective to reduce high frequency noise. Therefore, it is used for the part which generate | occur | produces a lot, such as an air conditioner duct and a gas turbine.

2) Metal filter-It has excellent air permeability and dust-collecting ability because open pores are formed by crossing metal fibers. It is also made of metal as a whole, so it is also used for filtering in high temperature conditions.

3) Electrode-It is useful as a test electrode in chemical process because it has high specific surface area and high ventilation rate.

4) Gaskets-Suitable for loaded gaskets due to their predictable stress-strain relationship. It is suitable for places where conductivity is required or to maintain a constant load distribution or to prevent overload.

5) Electromagnetic wave shielding and antistatic materials-When mixed with plastics and non-woven fabrics, it is light in weight and effectively shields electromagnetic waves or prevents static electricity.

Although the present invention has been described with reference to the above embodiments, this is only one embodiment, and those of ordinary skill in the art can implement a variety of other embodiments from this.

According to the method of manufacturing the metal fiber sintered body and the metal fiber recovery apparatus according to the present invention, the metal fiber can be obtained from the metal fiber waste that is discarded as waste at a lower cost, thereby reducing environmental pollution and producing the metal fiber sintered body as a by-product. There is an effect that it is possible to recover a large amount of metal fibers more effectively.

Claims (6)

A metal fiber waste collection step (S1) generated at an ironworks and the like to collect metal fiber waste 100 mixed with metal fibers, abrasive oil, and abrasive powder; Polishing oil evaporation step (S3) of evaporating the included abrasive oil by heating the metal fiber waste; A metal fiber separation step (S4) of separating the metal fiber waste from which the abrasive oil is evaporated into a metal fiber and abrasive powder by a magnetic separator (20) (50); A metal fiber capturing step (S5) of collecting the metal fibers by size using the mesh net unit 60 in which the separated metal fibers have a mesh of a predetermined size; A metal fiber molding step (S6) of molding the collected metal fibers into a predetermined shape; Metal fiber sintering step (S7) for sintering the formed metal fiber; And Method for producing a porous metal fiber sintered body comprising a; surface leveling step (S8) to pressurize the sintered metal fiber sintered body to make the surface flat. The method of claim 1, Method for producing a porous metal fiber sintered body characterized in that it further comprises a metal fiber waste grinding step (S2) of finely pulverizing by passing the metal fiber waste between the rollers (11) (12). delete A pulverizer 10 for pulverizing the lump-shaped metal fiber waste 100; A spiral path provided between the inlet port 31 through which the metal fiber waste flows through the grinder 10 and the outlet port 32 through which the metal fiber waste flows out, and the inlet port 31 and the outlet port 32 therein. A vibration dryer (30) installed at the bottom thereof, the vibrator (34) generating vibrations, and a heating device (35) for heating to remove abrasive oil from the metal fiber wastes; A magnet separator 50 for separating metal fibers and metal powder from metal fiber waste flowing out from the outlet 32; At least one grommet unit 60 for collecting the metal fibers separated by the magnet separator 50 in size; And And a cooling unit (38) connected to the vibration dryer (30) to recover the liquid by evaporating the liquefied polishing oil. delete The method of claim 4, wherein It is installed between the vibration dryer 20 and the magnet separator 50 to transfer the metal fiber waste in the direction of the magnet separator 50 and at the same time to further weaken the coupling force of the metal fiber and the abrasive powder 40 Metal fiber recovery apparatus comprising a.