KR101668579B1 - Method for manufacturing aluminum ingot from aluminum dross - Google Patents

Abstract

The present invention relates to a method of manufacturing an aluminum ingot using aluminum dross which performs a melting process by separating portions of aluminum dross after classifying the same in a particle size classifying process such that the present invention enables to improve a rate of recovery in accordance with an increase in dissolution efficiency; easily treat the classifying process which is subdivided using a specific classifying device; improve productivity; and reduce manufacturing costs. Moreover, an aluminum ingot is able to easily be taken out from a flask by integrally casting an aluminum bar having a hook on one end thereof inside the flask when casting the aluminum ingot.

Description

METHOD FOR MANUFACTURING ALUMINUM INGOT FROM ALUMINUM DROSS [0002]

The present invention relates to a method for manufacturing aluminum ingots using aluminum dross so that aluminum metal can be extracted from waste aluminum dross, which is a metallic oxide layer formed on the surface of the aluminum molten metal when aluminum metal or scrap is dissolved, and reused .

In general, aluminum is lightweight, has excellent processability, has high electric and thermal conductivity, and is made of various kinds of elements such as silicon (Si), magnesium (Mg), zinc (Zn), manganese (Mn) It is a metal used as a high strength, high corrosion resistant alloy. Accordingly, aluminum or aluminum alloys are widely used in industries such as beverage cans, vehicles, household appliances, architecture, machinery, electricity, and aircraft.

Since aluminum is a representative metal in which oxidation occurs well, when aluminum is dissolved, metallic aluminum dross (Al dross), which is an oxidized substance, comes into contact with oxygen in the air on the surface of the molten metal or the flow path of the molten metal.

In addition, aluminum dross uses aluminum to manufacture automobile parts and various household goods, and collects waste aluminum scrap after melting the aluminum ingot or product, and re-melts it, That is, final wastes generated in the process of manufacturing aluminum ingots.

The amount of the above-mentioned aluminum dross varies depending on the working temperature at the time of dissolution, the dissolution method and the components of the dissolving scrap, and is largely divided into a white dross, a black dross and a salt cake Respectively.

In the case of white dross, it refers to aluminum oxide formed on the surface of the molten metal above the melting furnace before the molten metal is injected into the flask after dissolving aluminum. In the white dross, there is a large amount of aluminum metal, which accounts for about 60 to 70% Aluminum can be recovered. In the case of black dross, it is a dross having a relatively smaller amount of aluminum than white dross because flux is added to prevent oxidation of the surface of the molten metal and to improve the efficiency of separation of impurities in the molten metal. ≪ / RTI > Finally, in the case of a salt cake, it refers to a finite dross after mixing and dissolving blackdroses with salt (NaCl + KCl) and recovering aluminum metal, and it contains less than 7 ~ 8% aluminum metal .

In order to increase the recycling rate and recovery rate of aluminum metal from the above-mentioned three kinds of dross generated upon dissolving aluminum, it is divided into aluminum and aluminum oxide through pretreatment such as crushing and classifying before melting, A large amount of aluminum oxide is present in a large particle size, and a small amount of aluminum oxide exists in a large amount of aluminum oxide. By this pretreatment process, aluminum oxide in the dross is separated, the amount of dross to be dissolved in the dross is reduced, and the aluminum metal content is increased to dissolve in the rotary furnace and the crucible furnace to reproduce the final aluminum ingot do.

In the case of manufacturing aluminum ingots from aluminum dross as described above, in order to increase the recovery rate of aluminum metal, a physical method is disclosed by the 'Aluminum chip and powder manufacturing method from aluminum dross' And the 'method of recycling aluminum dross' of Patent No. 2000-20557. However, the method of separating the compound by a simple physical impact is not high in cost efficiency, and the chemical method has a problem in that complicated steps such as leaching, filtration and precipitation, equipment and production cost are increased.

From this point of view, it is impossible to increase the recovery rate of aluminum metal and to improve the productivity and reduce the production cost by easily adding specific steps or devices while using the conventional aluminum alloy manufacturing method using aluminum dross as it is. The invention came out.

In order to solve the above problems, it is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for sorting granular materials, The present invention provides a method for manufacturing aluminum ingots using aluminum dross, which can improve the productivity and reduce the production cost by simplifying the classifying process using the equipment.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

According to another aspect of the present invention, there is provided a method of manufacturing an aluminum alloy using aluminum dross according to the present invention, comprising the steps of: supplying an aluminum dross to a ball mill and pulverizing the aluminum dross through the ball mill; , The pulverized aluminum dross is supplied to the first vibration classifier, and the first dross group having a particle size of 3 mm or more, the second dross group having a particle size of 1 mm to 3 mm and the second dross group having a particle size of 0 mm to 1 mm A third dross classifying step of classifying the first dross classified into the first dross class and the third dross class and storing the classified third dross class into a first dross classifying step and a second dross classifying step; A second dross classification step of classifying the first dross classified into a fourth dross group having a particle size of 0.25 mm to 1 mm and a fifth dross group having a particle size of 0 mm to 0.25 mm through a second vibration classifier, A dross mixing step of mixing the second dross group classified by the dross classification step and the fourth dross group sorted by the second dross classification step into a mixed dross group, An aluminum chip extracting step of supplying a Ross group to a Raymond mill and extracting a metal aluminum chip by removing the aluminum oxide layer from the mixed dross group through the Raymond mill; And a melt casting step of putting the metal dies extracted in the first dross group and the aluminum chip extraction step together into a melting furnace and melting the aluminum alloy chips to produce aluminum ingots.

Also, the first vibration classifier of the first dross classification stage may include a first classifying frame having an upper portion inclined downward and a lower portion inclining forwardly with respect to the rear, and a second classifying frame provided on the upper portion of the first classifying frame, A first classifying trough portion for receiving the aluminum dross pulverized by the crusher and classifying the aluminum dross into the first dross group, the second dross group and the third dross group, respectively, and then discharging the aluminum dross forward; A first classifying and storing unit for storing the first dross group, the second dross group, and the third dross group, respectively, disposed in front of the first classifying trough portion and discharged from the first classifying trough portion; And a first vibration generating unit for vibrating the first classification trough unit up and down with respect to the first classifying frame.

The first classifying trough portion is a rectangular box body with a bottom opened. The first classifying trough portion is formed with a first drawstooth inlet into which the aluminum draws are inserted in a rear upper surface. A first discharge port connected to the inside of the front is formed in the front left Wherein the first dross is discharged through the first discharge port and the upper portion is connected to the lower portion of the first trough so as to communicate with the lower portion of the first trough, And a second discharge port connected to the inside of the second dross, the second discharge port being disposed to face the front center, a second trough in which the second dross group is discharged through the second discharge port, A third duct connected to the lower portion of the trough so as to be connected to the inside and having a third outlet directed to the front right side and the third duct group being discharged through the third outlet; A first screen filter interposed between the first trough and the second trough to filter the second dross and the third dross so as not to pass through the first dross and the second dross, And a second screen filter sandwiched between the trough and the third trough to filter the third dross to pass therethrough but not pass the second dross.

The first vibration generating portion may include a plurality of first coil springs interposed between the first classifying trough and the first classifying trough portion, a first vibrator provided in the first classifying trough portion, And a control unit.

The second vibration classifier of the second dross classification stage may include a second classifying frame having an upper portion inclined downward at the front with respect to the rear portion and a second classifying frame provided at an upper portion of the second classifying frame, A second classifying trough portion for receiving the third dross group classified in the first classifying trough portion and classifying the third dross class into the fourth dross group and the fifth dross group and then discharging them forward; A second classifying storage section for storing the fourth dross group and the fifth dross group respectively discharged from the second classifying trough section; and a second classification storage section for storing the second classification trough section, And a second vibration generating unit for vibrating the upper and lower vibrating arms.

The second classifying trough portion has a rectangular box body with a bottom opened, and a second drawstooth inlet port into which the third dross group is inserted is formed on a rear upper surface, and a fourth outlet port connected to the inside is formed forward A fourth trough formed by the fourth dross group to be discharged through the fourth discharge port and a rectangular box body having an opened upper surface coupled to the lower part of the fourth trough so as to communicate with the lower part of the fourth trough; A fifth trough in which the fifth dross group is discharged through the fifth discharge port and a fifth outlet connected to the inside in front of the fifth trough, And a third screen filter interposed between the first dross group and the second dross group to pass the fifth dross group and not pass the fourth dross group.

The second vibration generating section may include a plurality of second coil springs interposed between the second classifying trough section and the second classifying trough section and a second vibrator provided in the second classifying trough section and generating vibration, And a control unit.

The melting and casting step may include a step of mixing the first dross group classified by the first dross classification step and the metal aluminum chips extracted in the aluminum chip extraction step together into a melting furnace, A casting step of casting an aluminum bar having a hook formed at one end of the molten metal; a step of placing the molten metal in the casting mold such that the hook of the aluminum bar is exposed to the outside, An aluminum ingot casting step of casting an aluminum ingot integrally with the aluminum bar, and an aluminum ingot extracting step of taking out the aluminum ingot cast inside the flask using the hook of the aluminum bar from the flask .

The method for manufacturing aluminum ingots using aluminum dross according to the present invention can improve the recovery rate due to the increase of the dissolution efficiency by separately dividing the aluminum ingots after classifying them in the classifying process according to the particle size.

Second, the classification process that is divided through the first vibration classifier and the second vibration classifier can be easily performed, thereby improving the productivity and reducing the production cost.

Thirdly, aluminum bars formed from a flask can be easily taken out by integrally casting an aluminum bar having a hook at one end thereof in the inside of the flask when casting the aluminum ingot.

FIG. 1 is a flow chart showing an embodiment of a method for manufacturing an aluminum ingot using aluminum dross according to the present invention,
FIG. 2 is an actual photograph of aluminum dross supplied to the ball mill in the dross crushing step of the embodiment of FIG. 1,
FIG. 3 is a view schematically showing respective steps of a dross crushing step, a first dross classification step and a second dross classification step in the embodiment of FIG. 1,
FIG. 4 is a perspective view showing a first vibration classifier used in the first dross classification stage of the embodiment of FIG. 3,
FIG. 5 is a side sectional view showing the first classifying trough portion of the embodiment of FIG. 4,
FIG. 6 is a perspective view showing a second vibration classifier used in the second dross classification stage of the embodiment of FIG. 3,
FIG. 7 is a side sectional view showing the second classifying trough portion in the embodiment of FIG. 6,
FIG. 8 is a view schematically showing respective steps of a dross mixing step, an aluminum chip extracting step and a melt casting step in the embodiment of FIG. 1,
FIG. 9 is a flowchart showing a concrete embodiment of the melt casting step in the embodiment of FIG. 1,
FIG. 10 is a photograph of actual processes of each step of the embodiment of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a method for manufacturing aluminum alloy using aluminum dross according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 10, the method for manufacturing aluminum ingots using aluminum dross according to the present invention includes a dross crushing step (S100), a first dross classification step (S200), a second dross classification step (S300 (S600) comprises a metal dissolving step (S610), a hook bar casting step (S610), a casting step (S600), and a casting step S620), an aluminum ingot casting step (S630), and an aluminum ingot extraction step (S640).

1 to 3, the aluminum dross 10 is supplied to the ball mill 10, and the aluminum dross 10 is crushed through the ball mill 10, do. As shown in FIG. 3, the ball mill grinder 100 is a device for crushing a material by a shock caused by a ball movement by inserting a plurality of ball steel balls together with a material to be crushed in a cylinder, and rotating the balls. The length of the cylinder is standard type that does not exceed the diameter, but there are various types such as tube mill with long diameter more than several times of diameter and intermediate compound mill, and the inner surface of the cylinder is built with special steel or nickel plate, Used to create.

As shown in FIG. 2, when the supplied aluminum dross 10 is pulverized and pulverized, the size of the aluminum dross 10 is divided according to the content of the aluminum metal contained in the aluminum dross 10 Crushed. The larger the particle size, the larger the amount of aluminum metal. The smaller the particle size, the more aluminum oxide is present. Therefore, when the pulverized aluminum dross 10 is dissolved at one time, the dissolution efficiency becomes poor and the recovery rate becomes extremely bad. If the pulverized aluminum dross 10 is treated only by the particle size, the dissolving process is increased compared to the recovery rate, The process of dividing and classifying the granules by crossing granules by granularity can minimize the dissolution process while increasing the recovery rate.

For this purpose, the first dross classification step (S200) and the second dross classification step (S300) are set to further refine the classification of the aluminum dross (10), and to simplify the classification process, The classification is performed through the first vibration classifier 200 and the second vibration classifier 300 as shown in FIGS.

3, the pulverized aluminum dross 10 is supplied to the first vibrating classifier 200, and the first vibrating classifier 200, The first dross group 11 having a particle size of 3 mm or more, the second dross group 12 having a particle size of 1 mm to 3 mm and the third dross group 13 having a particle size of 0 mm to 1 mm . The first dough group 11 is an aluminum dross 10 having a particle size of 3 mm or more and a high aluminum metal content and is dissolved in the melt casting step S600 to be described later for producing the aluminum ingot 20, The Ross group 12 and the third droplet group 13 are separately processed as described later.

As described above, the first vibration classifier 200 is used to classify the three types of vibration dampers into three groups in the first damping vibration class S200, A first classification trough 220, a first classification storage 230, and a first vibration generator 240. The first classification trough 220, the first classification storage 230,

The first classifying frame 210 is formed such that the upper portion thereof is inclined downward at the front with respect to the rear portion thereof and the first classifying trough portion 220 is provided at the upper portion of the first classifying frame 210, The first dross group 11, the second dross group 12 and the third dross group 13 are supplied with the aluminum dross 10 pulverized by the ball mill 100 of the first dross group 11, After each classification, they are discharged forward.

5, the first classifying trough 220 includes a rectangular box body with a bottom opened, and a first drawstooth inlet 221a into which the aluminum dross 10 is inserted, And a first discharge port 221b connected to the inside of the front is directed to the front left side and the first dross group 11 is provided with a first discharge port 221b discharged through the first discharge port 221b, And a second outlet 222a which is connected to the inside of the first trough 221 so as to be forwardly centered A second trough 222 in which the second dross group 12 is discharged through the second discharge port 222a and a second trough 222 whose upper surface is opened, , And a third outlet 223a connected to the inside of the front is connected to the lower right side of the front right side A third trough 223 which is disposed to face the third trough 221 and is discharged through the third discharge port 223a and a third trough 223 which is installed to face the first trough 221 and the second trough 222 A first screen filter 224 interposed between the second dross group 12 and the third dross group 13 to filter the first dross group 11 from passing therethrough, A second screen (22) interposed between the second trough (222) and the third trough (223) to pass the third dross group (13) and to filter the second dross group And a filter 225.

The first classifying storage unit 230 is disposed in front of the first classifying truing unit 220 and is disposed in the first classifying truff unit 220. The first classifying storing unit 230 includes the first dough group 11, The second droplet group 12, and the third droplet group 13, respectively. In addition, the first vibration generating unit 240 vibrates the first classification truff unit 220 up and down with respect to the first classifying frame 210. The first vibration generating unit 240 includes a plurality of first coil springs 241 interposed between the first classifying frame 210 and the first classifying truff unit 220, And a first vibrator 242 installed in the rough portion 220 to generate vibration.

Accordingly, the first classifying truff part 220 inclined with respect to the first classifying frame 210 is vertically oscillated by the first vibration generating part 240, and the aluminum debris 10 supplied to the inside of the first classifying truing part 210, Is divided into first trough 221, second trough 222 and third trough 223 through first screen filter 224 and second screen filter 225. The first dross group 11 is discharged from the first trough 221 through the first discharge port 221b and the second dross group 12 is discharged from the second trough 222 2 outlet 222a and the third dross group 13 is discharged from the third trough 223 forward through the third outlet 223a. At this time, a first classifying and storing unit 230 is installed in front of each of the first outlet 221b, the second outlet 222a and the third outlet 223a, and the first dough group 11 discharged from each of the first classifying and storing units 230, The second droplet group 12, and the third droplet group 13 are stored.

3, the third dross classification step S300 is a step of dividing the third dross group 13 classified by the first dross classification step S200 into a second vibration classifier 300 The fourth dross group 14 having a particle size of 0.25 mm to 1 mm and the second dross group 15 having a particle size of 0 mm to 0,25 mm through the second vibration classifier 300, Each group is classified and stored. As described above, the second vibration classifier 300 is used to classify the two groups into two groups in the second dross classification step S300, and the second vibration classifier 300 is used to classify A second classification block 310, a second classification trough 320, a second classification storage 330, and a second vibration generator 340.

The second classifying frame 310 is formed such that the upper portion thereof is inclined downward at the front with respect to the rear portion thereof and the second classifying trough portion 320 is provided at the upper portion of the second classifying frame 310, The third dough group 13 classified in step S200 is received and classified into the fourth dough group 14 and the fifth dough group 15 and discharged to the front respectively.

7, the second classifying trough 320 includes a rectangular box body with a lower surface opened, and a second draw trough portion 322 into which the third dross group 13 is inserted, And a fourth outlet 321b connected to the inside is installed so as to face the left front side and the fourth dross group 14 is arranged to be discharged through the fourth outlet 321b, 4 trough 321, a rectangular box body having an upper surface opened, an upper portion connected to the lower portion of the fourth trough 321, and a fifth outlet 322a connected to the inside in front, A fifth trough 322 which is disposed to face the fifth trough 321 and is discharged through the fifth outlet 322a and the fourth trough 321 and the fifth trough 322 ) To pass through the fifth dross group (15) and to filter out the fourth dross group (14) And a lean filter 323.

At this time, the second classifying storage part 330 is disposed in front of the second classifying truff 320, and the fourth classifying truff 320, And the fifth droplet group 15, respectively. Also, the second vibration generating unit 340 vibrates the second classification trough unit 320 up and down with respect to the second classifying frame 310. To this end, the second vibration generating unit 340 includes a plurality of second coil springs 341 interposed between the second classifying frame 310 and the second classifying truff 320, And a second vibrator 342 installed in the rough portion 320 to generate vibration.

Accordingly, the second classification trough section 320, which is inclined with respect to the second classifying frame 310, is vertically oscillated by the second vibration generating section 340, and the third dross 13 Is divided into a fourth trough 321 and a fifth trough 322 through the third screen filter 323. The fourth dross group 14 is forwardly discharged from the fourth trough 321 through the fourth discharge port 321b and the fifth dross group 15 is discharged from the fifth trough 322 5 outlet 322a. At this time, a second classifying and storing unit 330 is provided in front of each of the fourth outlet 321b and the fifth outlet 322a, and the fourth dough group 14 and the fifth dough group 15).

On the other hand, the fifth dross group 15 classified in the second dross classification step S300 is an aluminum dross 10 having a very small aluminum metal content with a particle size of 0 mm to 0.25 mm, It is also used as a material for building materials. However, the fourth dross group 14 is mixed with the second dross group 12 so as to minimize the process while increasing the recovery rate even though the aluminum metal content is small between 0.25 mm and 1 mm, and the aluminum chips 17 ).

That is, as shown in FIG. 8, the dross mixing step (S400) includes a step of classifying the second dross group 12 and the second dross classified by the first dross classification step S200 ) Are mixed and stored in the mixed dross group (16). The thus-stored mixed dross group 16 uses the Raymond mill 400 to remove the aluminum oxide layer and extract the metal aluminum chip 17 by the aluminum chip extraction step S500.

8, the mixed dough group 16 is supplied to the raymond mill 400 and the mixed dough group 16 is extracted from the mixed dough group 16 through the raymond mill 400 The aluminum oxide layer is removed and the metal aluminum chip 17 is extracted. The Raymond mill 400 is also referred to as a roller mill. The roller mill 400 presses three or four rollers on the disk to rotate the rollers, and the entire roll is crushed by applying compression, friction, and shearing action between the rollers, will be. When the mixed dross group 16 is finely pulverized through the Raymond mill 400, the aluminum oxide layer contained in the mixed dross group 16 is removed and the metal aluminum chip 17 having a high aluminum metal content is removed. Are aggregated in the form of granules in the Raymond mill (400). This metal aluminum chip 17 is put into the melting furnace 500 together with the first dross group 11 having a high aluminum metal content and melted to produce the aluminum ingot 20, thereby maximizing the recovery efficiency while maximizing the recovery efficiency It can be done.

That is, as shown in FIG. 8, the melt casting step S600 is performed by extracting in the first dough group 11 and the aluminum chip extracting step (S500) classified by the first dough sorting step (S200) And the metal aluminum chips 17 are put together into the melting furnace 500 and melted to produce the aluminum ingot 20. The melting furnace 500 may be a crucible as shown in FIGS. 8 and 10, and although not shown in the drawing, if a molten metal is poured into a mold 600 by melting a material such as a rotary furnace or a reflection furnace, It suffices. At this time, it is difficult to remove the aluminum bar 20 from the inside of the flask 600 at the time of making the aluminum bar 20, and therefore, the aluminum bar 30 having the hook 31 is separately prepared in order to secure the easiness of taking out .

That is, the melt casting step (S600) includes a metal dissolving step (S610), a hook bar casting step (S620), an aluminum ingot casting step (S630) and an aluminum ingot extracting step (S640) as shown in Figs. can do. The metal dissolving step S610 is performed in the first dross group 11 and the aluminum chip extracting step S500 classified by the first dross classification step S200 as shown in Figs. 8 and 10 The metal aluminum chips 17 are put together into the melting furnace 500 and dissolved in molten metal. In the casting step S620 of the hook bar, as shown in Fig. 10, the molten metal is cast into an aluminum bar 30 having a hook 31 formed at one end thereof. The aluminum casting step S630 is performed by placing the hook 31 of the aluminum bar 30 inside the flask 600 so that the hook 31 is exposed to the outside and injecting the molten metal into the flask 600, The aluminum ingot 20 is cast together with the aluminum alloy 30. Finally, in the step S640 of taking out the aluminum pieces, the aluminum mass 20 molded into the flask 600 is taken out from the flask 600 by using the hook 31 of the aluminum bar 30 . For example, the flask 600 can be fixed, the hook 31 of the aluminum bar 30 can be hooked up to a lifting device, a crane or the like, and the aluminum mass 20 can be taken out easily from the flask 600.

As described above, according to the method of manufacturing an aluminum ingot using aluminum dross according to the present invention, it is possible to increase the recovery rate according to the increase of the dissolution efficiency by separately dividing the aluminum particles after classification in the classifying process according to the particle size. In addition, since the classifying process can be easily performed through the first vibration classifier 200 and the second vibration classifier 300, the productivity and the production cost can be reduced. The aluminum bar 30 having the hook 31 formed at one end thereof during the casting of the aluminum ingot 20 is integrally molded into the inside of the flask 600 so that the aluminum bar 20 is removed from the flask 600 It can be easily taken out.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

10: aluminum dross 11: first dross group
12: 2nd Dross County 13: Third Dross County
14: Fourth Death County 15: Five Death County
16: mixed dross group 17: aluminum chip
20: Aluminum billets
30: aluminum bar 31: hook
100: ball mill
200: first vibrating classifier 210: first classifying frame
220: first classification trough section 221: first trough
221a: first drawstooth inlet 221b: first outlet
222: second trough 222a: second outlet
223: Third trough 223a: Third outlet
224: first screen filter 225: second screen filter
230: first classification storage unit
240: first vibration generating unit
241: first coil spring 242: first vibrator
300: second vibration classifier 310: second classifying frame
320: second classification trough section 321: fourth trough
321a: second drawstoe inlet 321b: fourth outlet
322: fifth trough 322a: fifth outlet
323: Third screen filter
330: second classification storage unit
340: second vibration generating unit
341: second coil spring 342: second vibrator
400: Raymond Mill
500: melting furnace
600: flask
S100: Dross crushing step
S200: 1st dross classification stage
S300: Second dross classification stage
S400: Dross mixing step
S500: Aluminum chip extraction step
S600: Fusing step
S610: Metal melting step S620: Hook bar casting step
S630: Aluminum ingot casting step S640: Aluminum ingot extraction step

Claims (8)

A dross crushing step of supplying an aluminum dross to a ball mill crusher and crushing the aluminum dross through the ball mill crusher,
The pulverized aluminum dross is supplied to a first vibration classifier, and a first dross group having a particle size of 3 mm or more, a second dross group having a particle size of 1 mm to 3 mm and a second dross group having a particle size of 0 mm to 1 mm Three dross groups, and three dross groups,
The third dross group classified by the first dross classification step is supplied to the second vibration classifier, and the fourth dross group having a particle size of 0.25 mm to 1 mm and the second dross group having a particle size of 0 mm to 0.25 a second dross classification step of classifying the first dross classified into the first dross class and the fifth dross class,
A dross mixing step of mixing the second dross group classified by the first dross classification step and the fourth dross group classified by the second dross classification step into a mixed dross group,
The mixed dross group is supplied to a raymond mill composed of a plurality of rollers rotating and revolving on a disk, and the mixed dross group is crushed by applying compression, friction and shearing action between the rollers of the raymond mill and the original plate, An aluminum chip extracting step of extracting the metal aluminum chip by removing the aluminum chip,
And a melt casting step of putting together the first dross group classified by the first dross classification step and the metal aluminum chips extracted in the aluminum chip extraction step together into a melting furnace and melting to produce an aluminum ingot A method for manufacturing aluminum billet using aluminum dross.
The method according to claim 1,
Wherein the first vibration classifier of the first dross classification stage comprises:
A first classifying frame having an upper portion inclined downward at the front with respect to the rear portion,
The aluminum dross provided on the first classifying frame and ground by the ball milling machine in the dross crushing step is supplied to the first dross group, the second dross group and the third dross group A first classifying trough portion for classifying and discharging the sample to the front,
A first classifying storage unit that is provided in front of the first classifying trough unit and stores each of the first dough group, the second dough group, and the third dough group discharged from the first classifying trough unit; Wow,
And a first vibration generating portion for vibrating the first classifying trough portion up and down with respect to the first classifying frame.
3. The method of claim 2,
The first classifying filter unit may include:
A first drawstooth inlet port through which the aluminum dross is inserted is formed on a rear upper surface of the rectangular box body with the lower surface thereof opened, a first discharge port connected to the inside of the front is formed so as to face the front left side, A first trough which is discharged through the first outlet,
And a second discharge port communicating with the inside of the front is installed so as to face the front center, and the second dross group is provided in the box body of the second dross, A second trough which is discharged through the second outlet,
And a third discharge port connected to the inside in front is disposed so as to face the front right side, and the third dross group is provided in the box body of the second ditch, The third trough discharged through the third outlet,
A first screen filter sandwiched between the first trough and the second trough to filter the second dross and the third dross so as not to pass the first dross,
And a second screen filter sandwiched between the second trough and the third trough to filter the third dross and the second dross so as not to pass through the third dross, Method of manufacturing aluminum ingots used.
3. The method of claim 2,
The first vibration generating unit may include:
A plurality of first coil springs interposed between the first classifying frame and the first classifying trough portion,
And a first vibrator installed in the first classification trough portion and generating vibration.
The method according to claim 1,
And the second vibration classifier of the second dross classification stage comprises:
A second classifying frame having an upper portion formed to be inclined downward forward from the rear,
The third dross group disposed at the upper portion of the second classifying frame and being classified at the first dross classification stage, is classified into the fourth dross group and the fifth dross group, A second classifying trough portion for discharging the sample,
A second classification storage unit disposed in front of the second classification truff unit and storing the fourth dross group and the fifth dross group discharged from the second classification truff unit,
And a second vibration generating part for vibrating the second classification trough part up and down with respect to the second classifying frame.
6. The method of claim 5,
Wherein the second classifying portion includes:
A second drawstooth inlet port into which the third dross port is inserted is formed on a rear upper surface of the rectangular box body with the lower surface opened, a fourth outlet port connected to the inside of the front is provided so as to face the front left side, A fourth trough in which the droplet group is discharged through the fourth discharge port,
And a fifth discharge port connected to the inside in front is disposed so as to face the front right side, and the fifth dross group is provided in the box body of the second dross, 5 outlet through a fifth outlet,
And a third screen filter interposed between the fourth trough and the fifth trough to filter the fifth dross and the fourth dross so as not to pass through the third dross, Method of manufacturing aluminum ingots used.
6. The method of claim 5,
Wherein the second vibration generating unit comprises:
A plurality of second coil springs interposed between the second classifying trough and the second classifying trough,
And a second vibrator provided in the second classification trough portion and generating vibration.
The method according to claim 1,
Wherein the melt casting step comprises:
A metal dissolving step of placing the first dross group classified by the first dross classification step and the metal aluminum chip extracted in the aluminum chip extraction step together into a melting furnace and melting the molten metal,
A hook bar casting step of casting the molten metal into an aluminum bar having a hook at one end thereof,
An aluminum ingot casting step of placing the aluminum bar inside the flask so that the hook of the aluminum bar is exposed to the outside, injecting the molten metal into the flask, casting the aluminum ingot integrally with the aluminum bar,
And a step of taking out an aluminum ingot cast in the inside of the flask using the hook of the aluminum bar from the flask.

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