JP3009123B2 - Aluminum dross recovery processing method and apparatus, and aluminum dross lump or steel processing agent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for recovering aluminum dross and a treating agent for producing aluminum dross lump or steel, and which melts or alloys aluminum or aluminum alloy (hereinafter simply referred to as aluminum). The molten aluminum is appropriately recovered from the hot aluminum dross having a melting point higher than the melting point of aluminum generated in the melting process such as refining, and the dross used in the steel manufacturing process such as steelmaking, steelmaking and steelmaking with high aluminum content. Acid, a recovery treatment method and an apparatus capable of effectively obtaining a treatment agent preferable for use as a heat-retaining or temperature-raising treatment agent, and an apparatus therefor. Aluminum as a low-cost treatment agent that can be implemented It is intended to provide a Umudorosu mass.

[0002]

2. Description of the Related Art The generation of aluminum dross is inevitable in melting aluminum or aluminum alloys, and such studies on the recovery of metallic aluminum from aluminum dross have been studied to some extent. That is, in order to recover metallic aluminum from such aluminum dross, generally, flux is generally added to dross contained in a container to cause the aluminum to oxidize and generate heat, weaken the oxidized film and increase the fluidity of the molten metal aluminum, By mechanically agitating such aluminum dross, the oxide film is broken, and the aluminum droplets which have become large due to the bonding of the metals are settled at the bottom of the container and separated.

On the other hand, in Japanese Patent Application Laid-Open No. Sho 60-500542 (Japanese Patent Publication No. 62-10287), a pressing tool is pressed to the upper part, and the pressing tool is lowered at the maximum speed until a liquid aluminum flow appears at the lower part of the mold. Thereafter, it is disclosed that the pressing tool is lowered at a speed that becomes slower as the liquid aluminum concentration decreases, and that the pressing tool is subjected to an impact in such a method.

[0004] On the other hand, Japanese Patent Application Laid-Open No.
JP-B-37-7881) proposes a synthetic slag conditioner formed in a lump by using an appropriate binder for the aluminum dross. Japanese Patent Application Laid-Open No. 51-97524 (JP-B-56-30368) discloses this aluminum dross. The main component is a mixture of lime and lime.
A synthetic slag conditioning material for steelmaking at 1600 ° C. has been proposed.

Further, Japanese Patent Application Laid-Open No. Sho 62-205210 (JP-B-2205210)
Japanese Patent Application Laid-Open No. Hei 3-12220 discloses that an aluminum dross mixed with iron, steel dust and the like is charged into a ladle to cause an oxidation reaction.
9. JP-A-3-122210 also discloses that aluminum dross is contained together with fluorite in the refining agent added to the dephosphorization furnace.

[0006]

According to the conventional method for recovering metallic aluminum from aluminum dross as described above, it is impossible to recover 100% of the metal, and the metallic aluminum corresponding to the treated dross cannot be recovered. Residuals are inevitable. In addition, the metal in the aluminum dross is heated by burning the metal with the added flux.Therefore, the metal loss is large, and there is a risk of explosion due to a rapid oxidation reaction. There are disadvantages such as large.

[0007] It can be said that squeezing using pressure or applying an impact as described in Japanese Patent Application Laid-Open No. Sho 60-500542 can alleviate the disadvantages of the conventional method as described above. It consists of fluids such as metal aluminum and air entrained and powders of aluminum oxide, aluminum nitride, etc.When such aluminum dross is filled in a container and a load is applied, due to internal friction of dross particle powder The arcing phenomenon occurs and the transmission of force is impeded, the discharge of the fluid becomes inadequate, the air remains still much, the oxidation of the aluminum contained in the dross progresses, and the weight of the dross increases significantly On the other hand, the amount of metallic aluminum retained in the dross will decrease, and the utility value or commercial value of the dross will be significantly lower. The resulting not. The energy required for squeezing is also large.

[0008] Any of the techniques described in JP-A-47-38719 and JP-A-62-205210 for utilizing aluminum dross for refining steel or adjusting slag is related to effective use of dross generated during aluminum refining. Although it is clear that this is a technology, the use of such aluminum dross is intended to reduce the oxygen in steel by oxidizing aluminum, and to improve the properties of steel and the like by utilizing the heat generated by the oxidation. Therefore, it is important that the amount of aluminum metal in the dross is high, and the maximum amount of aluminum metal is 30
%, Dross as low as about% does not only have a poor effect as described above, but also increases the amount of generated slag, making the treatment difficult. Therefore, when the aluminum metal content is low as described above, special treatment is required as a mere industrial waste, and it is inevitable to dispose of it.

[0009]

SUMMARY OF THE INVENTION The present invention has been studied for solving the problems of the prior art as described above, and when the compressed dross having an arching is further compressed, the compression dross is different from the pressing direction. The compression dross is plastically deformed in the direction of squeezing and squeezing, which surely destroys the arching, collects aluminum droplets, moves dross particles to the remaining voids under the arching, fills the voids, and removes flow components such as air. It effectively eliminates aluminum oxidation, suppresses aluminum oxidation, increases the solid content, and succeeds in obtaining an industrially advantageous treatment agent for aluminum dross lump or steel production, as follows. It is.

(1) The dross having a melting point higher than that of aluminum is primarily compressed, and the compressed dross after the primary compression is compressed again, and the compressed dross is different from the compression direction of the primary compression. Aluminum dross recovery processing method, wherein the aluminum dross is plastically deformed in the direction of squeezing.

(2) The aluminum dross is squeezed in a container having an enlarged diameter portion in the axial direction.
An aluminum dross recovery processing method, characterized in that after the next compression, the container is moved in the axial direction to form a gap between the compressed dross and the inner surface of the container and then pressed again.

(3) The aluminum dross is squeezed in the container, and after the primary squeezing, a vibration is applied to the container to form a gap between the compressed dross and the inner surface of the container and squeezed again. Aluminum dross recovery processing method.

(4) The aluminum dross is squeezed in a container, and after the primary squeezing, a partial squeezing is alternately applied to the compressed dross by a plurality of squeezing means, so that the compression direction is different from the compression direction of the primary squeezing. An aluminum dross recovery processing method characterized by plastically deforming in an inclined direction.

(5) A perforated pedestal adapted to receive the dross and allow the fluid separated by pressing to pass therethrough, a container formed to surround the perforated pedestal, and received on the perforated pedestal. An aluminum dross recovery processing device, comprising pressing means for squeezing a dross, forming an enlarged-diameter portion in an axial part of the container, and providing the container movable in the axial direction.

(6) A perforated pedestal adapted to receive the dross and allow the fluid separated by pressing to pass therethrough, a container formed to surround the perforated pedestal, and received on the perforated pedestal. An aluminum dross recovery processing device, comprising: pressing means for squeezing a dross; and lateral vibration applying means for the container.

(7) A perforated pedestal for receiving the dross and allowing the fluid separated by pressing to pass therethrough, and a container formed to surround the perforated pedestal,
An aluminum dross collecting and processing apparatus, comprising pressing means for partially compressing dross received in the container.

(8) An aluminum mass obtained by removing aluminum droplets from aluminum dross, having a bulk specific gravity of 1.9 g / cm ³ or more and an aluminum content of 45 g / cm ^3.
% Or more aluminum dross mass.

(9) An aluminum mass obtained by removing aluminum droplets from aluminum dross, having a bulk specific gravity of 2.0 g / cm ³ or more and an aluminum content of 45 g / cm ^3.
% Or more aluminum dross mass.

(10) An aluminum dross mass obtained by removing aluminum droplets from aluminum dross,
Bulk specific gravity is 1.9 g / cm ³ or more and aluminum content is 4
A treating agent for steel production characterized by being at least 5%.

(11) An aluminum dross mass obtained by removing aluminum droplets from aluminum dross,
Bulk specific gravity is 2.0 g / cm ³ or more and aluminum content is 4
A treating agent for steel production characterized by being at least 5%.

[0021]

The molten aluminum dross having a melting point equal to or higher than the melting point of aluminum is subjected to primary pressing, and then pressed again after the primary pressing, so that more molten aluminum can be recovered. When the compressed dross is compressed again, the compressed dross is plastically deformed in a direction different from the compression direction of the primary compression and compressed, whereby the dross mass structure compression-molded by the primary compression is divided. Then, efficient secondary pressing is achieved, and the amount of molten aluminum pressed out by repressing can be made sufficiently large. That is, when squeezing dross in a container,
Arching of the dross powder occurs inside the compressed dross, so that sufficient compression cannot be achieved. However, according to the present invention, the compressed dross in which the arching has occurred is recompressed by 1 at the time of compression.
The arching is destroyed by deforming the compression dross in a direction different from the stress applied to the dross in the next pressing, and the gap under the arching is pressed out of the metal by the dross movement, filling it easily, and achieving favorable re-pressing. Close. The metal remaining in the dross without being discharged is not oxidized because the air required for the oxidation is scarce, and becomes a dross with a high concentration of metallic aluminum and a high density.

The aluminum dross is squeezed in a container having an enlarged diameter portion in the axial direction, and after the primary compression, the container is moved in the axial direction to form a gap between the compressed dross and the inner surface of the container and squeezed again. By doing so, both the primary pressing and the re-pressing are performed by the pressing action in the same direction, and the efficient pressing that is plastically deformed by the relatively simple pressing equipment is smoothly performed.

The aluminum dross is squeezed in the container, and after the primary squeezing, the container is subjected to lateral vibration to form a gap between the compressed dross and the inner surface of the container and squeezed again to perform the vibration treatment. Simply adding dross contained in a single container will be subjected to primary repressing followed by efficient repressing.

The aluminum dross is squeezed in a container, and after the primary squeezing, a partial squeezing is alternately applied to the compressed dross by a plurality of squeezing means so that the compressed direction is different from the compression direction of the primary squeezing. By plastic deformation, efficient compression of the dross and consequently advantageous separation of the molten aluminum can be obtained simply by providing a plurality of pressing means.

A perforated pedestal for receiving the dross and passing the fluid separated by pressing, a container formed to surround the perforated pedestal, and a dross received on the perforated pedestal. Having a pressing means for squeezing, forming a large-diameter portion in an axial part of the container and providing the container so as to be movable in the axial direction, only moving the container receiving the dross in the axial direction. The re-squeezing accompanied by the plastic deformation after the primary compression is easily performed.

A perforated pedestal for receiving the dross and allowing the fluid separated by pressing to pass therethrough, a container formed to surround the perforated pedestal, and the dross received on the perforated pedestal. It has a pressing means for squeezing and adopts a normal squeezing equipment by providing a vibration applying means in the lateral direction to the container. Efficient after primary squeezing by simply providing the vibration applying means. Effective secondary deformation of plastic deformation.

It has a perforated pedestal for receiving the dross and allowing the fluid separated by pressing to pass through, and a container formed to surround the perforated pedestal. On the other hand, by providing a plurality of pressing means for applying partial pressing, efficient plastic deformation after the primary pressing secondary pressing can be achieved by simply pressing the pressing means and alternately pressing the pressing means in a normal pressing facility. Get it done properly.

An aluminum mass obtained by removing aluminum droplets from aluminum dross, having a bulk specific gravity of 1.
When the content is 9 g / cm ³ or more and the aluminum content is 45% or more, effective use of the aluminum content as an aluminum dross lump is achieved.

This is an aluminum mass obtained by removing aluminum droplets from aluminum dross, and has a bulk specific gravity of 2.
When the aluminum content is 0 g / cm ³ or more and the aluminum content is 45% or more, effective use of the aluminum content as an aluminum dross lump is achieved.

An aluminum dross mass obtained by removing aluminum droplets from aluminum dross, having a bulk specific gravity of 1.
9 g / cm ³ or more, and the aluminum content is 45% or more. Although it is a dross lump, heat generation or chemical reaction due to high aluminum content is advantageously performed to improve the steel quality. Do it.

The aluminum dross mass has a bulk specific gravity of 1.9.
g / cm ³ or more, the aluminum dross mass is reduced in size and the powdering is suppressed, handling and storage are facilitated, and the air content in the dross mass is reduced to reduce the oxidation loss of the aluminum mass. And improve the efficiency of the purpose of treatment on iron and steel as described above.

The bulk specific gravity of the aluminum dross mass is 2.0
g / cm ³ or more, the aluminum dross mass is reduced in size and the powdering is suppressed, handling and storage are facilitated, and the air content in the dross mass is reduced to reduce the oxidation loss of the aluminum mass. And improve the efficiency of the purpose of treatment on iron and steel as described above.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS To explain the specific embodiment of the present invention as described above, the dross processing method according to the present invention is scraped from an aluminum melting furnace into a container having a bottom plate having a large number of holes, The dross, which has been maintained at or above the melting point of aluminum and preferably immediately after being scraped out, is housed and a pressing part such as a piston is press-fitted from above to break down the oxide film on the molten metal aluminum in the dross and separate and discharge the fluid components. In this case, the secondary pressing is performed, and the secondary pressing accompanied by plastic deformation is performed, whereby efficient separation of metallic aluminum and enrichment of residual aluminum in dross can be obtained.

Generally, the size of the opening in the container bottom plate is preferably about 10 to 30 mm, and when it is formed in a slit shape, the width is about 10 to 20 mm.
It is appropriate that the opening area is 10% or more, preferably 40% or more. That is, when the size of the opening is less than 10 mm or the opening area is less than 10%, clogging is likely to occur, and it becomes difficult to discharge liquid aluminum or air. On the other hand, it exceeds 30 mm or the slit width is 2
If it exceeds 0 mm, not only the flow component but also aluminum dross may fall, which is not preferable. Since the bottom plate having a large number of openings receives a high pressing force when the dross is pressed, a support table for receiving the bottom plate is provided to form a porous receiving table.

For pushing by a piston as a pressing means, it is preferable to have a capacity of about 2 to 10 MPa, and the pushing speed is generally 5 to 60 cm / min.
About 5 cm / mi.
If it is slower than n, the process takes time, the oxidation and nitridation of the metal in the dross progresses, and the dross cools, reducing the fluidity of the metal. Can not. On the other hand, the pushing speed is 60
When the speed is higher than cm / min, the indentation pressure increases due to the internal resistance of the powder and the like, and the energy efficiency is poor and the filling is not performed sufficiently. The commercial value of the later dross decreases.

The vibration applied to the container after the dross is accommodated and subjected to the primary compression is transmitted to the dross via the container by a vibrator vibrating in the lateral direction attached to the main body of the apparatus, and furthermore, an electric device using an electromagnet or the like is used. A repetitive vibration action can be adopted.

One example of the general configuration of the apparatus according to the present invention is as shown in FIGS. 1 and 2. As a specific example, an iron cylindrical container 1 supports a machine base 10 through a molten metal receiving means 2. It is supported by a seat 16 and can receive a dross material of about 0.5 m ³ therein. A receiving means 2 provided at the bottom of the container 1 is a porous bottom plate serving as a bottom plate of the container 1. 11a and a support base 11b for receiving the porous bottom plate 11a. The receiving means 2 is provided with a receiving part 22 for receiving and storing the molten metal. It is configured to be linked and operated.

A perforated bottom plate 11a, such as a grating, is attached to the bottom surface of the container 1, and a flange 12 is projected from the top. An intermediate portion of the container 1 is provided below the flange 12. The engaging portion 18 protruding to the side is the machine base 1.
0 is supported by a pedestal 13 opposed to the side of the middle part of the cylinder 10, and the pedestal 13 is a push-up cylinder 14 attached to the machine base 10.
And a guide 7 for raising and lowering. That is, the container 1 and the receiving means 2 at the raised position by the receiving table 13
3, is set on the side of the aluminum melting furnace 6 as shown in FIG. 3, receives the scraped dross, is again loaded into the machine base 10, and undergoes the recovery processing according to the present invention. The container 14 is raised slightly by 14 so that the height of the container 1 relative to the dross 9 in the container 1 can be changed. Perforated bottom plate 11a placed on receiving means 2
The supporting base 11b for supporting the solid beam 21 and the reinforcing member 31
The strength is secured by.

A pressing plate 8 is mounted on the dross 9 accommodated in the container 1, and is pressed by a pressing head 41 interlocked with the pistons of the pressing cylinders 4, 4 provided on the machine base 10. However, a pipe 42 from a hydraulic unit (not shown) is guided to the pressing cylinders 4, 4, and the pressing head 41 receives vibrations from the vibration breaker 5 and pressurizes and vibrates. It is made to be done. The pressing head 41 is hung on a suspension pipe 43 that is linked to the pistons of the pressing cylinders 4 and 4.

In the present invention, an enlarged inclined portion 17 is formed at the lower end portion of the container 1 as described above, and the compression dross 9a (in the container 1) is pushed up by the push-up cylinder 14 with respect to the engaging portion 18 as described above. 4 (see FIG. 4), that is, the enlarged inclined portion 17 is compressed dross 9a.
The pressing cylinders 4, 4 in a state where an appropriate gap is formed on the side of the pressing cylinder 4, 4 can be pressed.

In the container 1, the dross 9 undergoes the primary and secondary pressing and recovery processing by the cylinder 4 and, if necessary, the vibration breaker 5 as described above, and finally the bottom of the container 1 It is known that the dross cake placed in a compressed state is transferred onto a cake receiving pallet, taken out of the container 1 by being taken out by a cake taking-out cylinder, and taken out on the cake receiving pallet. Then, the container 1 from which the cake has been removed is moved to the side of the aluminum melting furnace 6 as shown in FIG. 3 to receive a new aluminum dross.

The squeezing operation process by the apparatus shown in FIGS. 1 to 3 as described above is schematically shown in FIG. 4, or the one according to the present invention is schematically shown in FIG. Even if the container 1a in which the diameter-enlarging portion 19 is formed in the lower part of the container 1 as described above is used, it is possible to position the compression dross 9a in the diameter-enlarging portion 19 and to carry out in substantially the same manner as in FIG. It is clear.

In addition to those shown in FIGS. 4 and 5, FIG.
A vibration mechanism for applying vibration to the container 1 in the horizontal direction is provided as shown in FIG.
By applying a vibration to the inner surface of the container 1, a gap is formed between the inner surface of the container 1 and the compression dross 9a, and pressing is performed again in this state to obtain a desired plastic deformation pressing.

Further, according to the present invention, as shown in FIG. 7, a plurality of pressing plates 8 are provided, and each pressing plate is provided with a pressing means. The operation of partially compressing the dross 9 accommodated in the container 1 by releasing the pressurization of the container 1 is alternately performed, and the plastic deformation is alternately generated by the partial compression. Results are obtained.

An example according to the present invention implemented by using the above-described apparatus and a comparative example will be described. In the container 1 as described above, the size of the opening 32 was 15 mmφ and the opening area was 20%. As shown in FIG. 3, the scraping tool 3 has a perforated support 11 composed of a perforated bottom plate 11 a and a support base 11 b supporting the perforated bottom plate 11 a.
The dross 9 whose temperature was scraped out at around 750 ° C. was appropriately housed with approximately 150 kg as a guide.
In other words, it is practically impossible to accurately weigh out a fixed amount of the dross that has been scraped out. It was decided to.

The detailed conditions in the comparative example and the embodiment of the present invention are as shown in Table 1 described below. As a comparative example 2, the method was applied three times by using both the pressurization by the piston at the top of the container and the impact vibration. For each of these comparative examples, the one according to the present invention uses the containers as shown in FIGS. 4 to 7 described above, and (a) to (g) in each of these drawings.
Or, it was carried out by the processing steps shown as (a) to (f) in stages.

The distance (gap) between the compressed dross 9a after the primary pressing and the inner surface of the container 1 is 10 mm in FIG.
Then, the container 1 was raised to a position, and the dross 9a was crushed and pressed while being plastically deformed. The one in FIG.
700mm diameter at the bottom of a cylindrical part of 0mm and 500mm height
After the first compression, the container was pulled up by 200 mm, the compressed dross 9a was transferred to a portion having a diameter of 700 mm, and subjected to secondary compression.

FIG. 6 further shows that after the first pressing,
After applying vibration of 0 Hz and amplitude of 2 mm, secondary pressing was performed. In the case of FIG. 7, a half-circle is formed after charging dross at 750 ° C. into a container having a height of 600 mm and a diameter of 600 mm.
Using the divided pressing plates, each pressing plate was alternately pressed by one pressing means, and when one was pressed, the other was in a free state excluding the piston pressure.

As for Comparative Examples 1 and 2, Comparative Example 1 followed the method of pushing the piston, interrupting the pushing, and then squeezing again. The squeezing was performed according to a method of applying an impact to the indentation piston in such squeezing.

The details of the processing conditions and the processing results for the comparative examples and the examples of the present invention as described above are shown in Table 1 below.
As shown in FIG. 4, according to the embodiment of the present invention, FIG.
~ The recovered Al weight is 48 ~
It is as large as 58 kg, the recovery rate of Al is as high as 45 to 53%, and the Al percentage in the dross after treatment is as high as 48 to 56%, which is significantly improved as compared with Comparative Examples 1 and 2. It was confirmed that.

[0051]

[Table 1]

[0052] Moreover, as the bulk specific gravity after this treatment is considerably higher than 1.4~1.6g / cm ³ in Comparative Example 2.0 g / cm ³ or more, and height and the bulk density was bovine斯The high content of metallic aluminum in the dross is presumed to be due to the efficient discharge of the air in the dross and the suppression of oxidation in the dross after the treatment. That is, as the oxidation of aluminum progresses during the treatment, the metallic aluminum content decreases and changes to 1.9 times the weight of alumina (Al + O ₂ → Al).
₂ O ₃ ), the aluminum content in the dross is reduced, the dross weight after the treatment is increased, and the treatment amount is increased. That is, according to the present invention, the dross weight increase rate is 1
-4%, whereas in the conventional example or the comparative example, 14-1%.
9%, which indicates that the method of the present invention has an effect of suppressing the oxidation of Al in dross.

However, the fact that the aluminum alloy of the present invention has an increased Al% means that after this treatment, the dross is deoxidized and kept warm as a treating agent containing an auxiliary in the steel making process such as iron making, steel making, refining, casting and the like. Alternatively, when used for any purpose such as temperature rise, each purpose is effectively achieved by relatively small addition, and the addition reduces the amount of slag generated and improves the steel quality etc. It shows that it can be advantageously used, and does not increase the amount of reuse and reprocessing.

[0054]

In the present invention as described above,
Metal aluminum can be recovered from the dross maintained at a temperature equal to or higher than the aluminum melting point without using flux, and the metal aluminum remaining in the dross after the treatment is left in the dross without causing oxidation and nitriding, and Since dross with a high aluminum concentration can be obtained, the conventional one has a low aluminum concentration and contaminates hot metal, molten steel, etc., making its cleaning difficult and difficult to use.
This invention is industrially effective because it can be used as a useful resource instead of having to struggle with waste treatment.

[Brief description of the drawings]

FIG. 1 is a front view of an aluminum dross recovery processing apparatus according to the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a cross-sectional view showing a dross scraping operation state in an aluminum melting furnace.

FIG. 4 is an explanatory view showing a stepwise processing process by the container shown in FIGS. 1 to 3;

FIG. 5 is a step-by-step illustration of a process using another container according to the present invention.

FIG. 6 is a step-by-step illustration of the process of the present invention by a further apparatus.

FIG. 7 is an explanatory diagram showing another processing step according to the present invention step by step.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 container 2 receiving means 3 dross scraping tool 4 pressing cylinder 5 pressurizing and vibrating cylinder 6 melting furnace 7 guide 8 pressing plate 9 dross 9a compression dross 10 DESCRIPTION OF SYMBOLS 14 Push-up cylinder 16 Support seat 17 Increasing inclined part 18 Engagement part 21 Beam 22 Receiving part 23 Coupling means 41 Press head

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroshi Mochizuki 161 Kambara, Kambara-cho, Anbara-gun, Shizuoka Japan Light Metal Co., Ltd. Kambara Works (72) Inventor Masatoshi Nanba 3-13-12 Mita, Minato-ku, Tokyo Nippon Light Inside Metals Co., Ltd. (72) Inventor Kunio Hayashi 351 Ejiri, Takaoka City, Toyama Pref.Hokko Co., Ltd. In-house (56) References JP-A-6-200318 (JP, A) JP-A-6-49550 (JP, A) JP-A-47-38719 (JP, A) JP-A-3-243373 (JP, A) JP-B-62-10287 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) C22B 21 / 00 C21C 7/00 C22B 7/04

Claims (11)

(57) [Claims] 1. A dross having a melting point equal to or higher than the melting point of aluminum is subjected to primary compression, and the compressed dross after the primary compression is again compressed. The compression dross is different from the compression direction of the primary compression. A method of recovering aluminum dross, characterized by plastically deforming in the direction and squeezing. 2. An aluminum dross is squeezed in a container having an enlarged diameter portion in the axial direction, and after the primary compression, the container is moved in the axial direction to form a gap between the compressed dross and the inner surface of the container. An aluminum dross recovery treatment method characterized by squeezing again. 3. The aluminum dries, wherein the aluminum dross is squeezed in a container, and after the primary squeezing, a vibration is applied to the container to form a gap between the compressed dross and the inner surface of the container, and the aluminum dross is squeezed again. Dross recovery processing method. 4. The aluminum dross is squeezed in a container, and after the primary squeezing, a plurality of squeezing means alternately apply partial squeezing to the compressed dross to be different from the compression direction of the primary squeezing. An aluminum dross recovery processing method characterized by plastically deforming in the direction. 5. A perforated pedestal for receiving a dross and passing a fluid separated by pressing, a container formed to surround the perforated pedestal, and a dross received on the perforated pedestal. An aluminum dross recovery processing device, comprising pressing means for squeezing the container, forming an enlarged diameter portion in a part of the container in the axial direction, and providing the container movable in the axial direction. 6. A perforated pedestal for receiving a dross and passing a fluid separated by squeezing, a container formed to surround the perforated pedestal, and a dross received on the perforated pedestal. An aluminum dross recovery processing device, comprising: pressing means for squeezing the container; and lateral vibration imparting means for the container. 7. A perforated pedestal for receiving a dross and allowing a fluid separated by squeezing to pass therethrough, and a container formed to surround the perforated pedestal, and received in the container. An aluminum dross recovery processing device, comprising a pressing means for partially compressing the dross. 8. An aluminum mass obtained by removing aluminum droplets from aluminum dross, and having a bulk specific gravity.
An aluminum dross mass having a weight of 1.9 g / cm ³ or more and an aluminum content of 45% or more. 9. An aluminum mass obtained by removing aluminum droplets from aluminum dross, and having a bulk specific gravity.
An aluminum dross mass having a weight of 2.0 g / cm ³ or more and an aluminum content of 45% or more. 10. An aluminum dross mass obtained by removing aluminum droplets from aluminum dross, having a bulk specific gravity of not less than 1.9 g / cm ³ and an aluminum content of not less than 45%. Processing agent. 11. An aluminum dross mass obtained by removing aluminum droplets from aluminum dross, having a bulk specific gravity of not less than 2.0 g / cm ³ and an aluminum content of not less than 45%. Processing agent.