JPH09165630A - Method for melting regenerated aluminum and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heat and melt solid aluminum to be regenerated without oxidizing. SOLUTION: While pouring molten aluminum onto the solid aluminums to be treated, the solid aluminum and the molten aluminum are together charged into molten aluminum to continuously melt the solid aluminum. A mixing tube 6 having an aluminum feeding-in part for receiving the solid aluminum at the upper part is vertically arranged at one side of a melting furnace and the lower end of the mixing tube 6 is inserted into below the molten metal surface level in the melting furnace. The one end of a feeding-out tube 12 for the molten aluminum is faced to the upper part of the aluminum feeding-in part and the other end of the feeding-out tube 12 is connected to a spouting tube 13 of a molten metal pump.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to regeneration of aluminum chips, cut pieces, and other solid aluminum to be regenerated with molten aluminum, and feeding the mixture of these to the molten aluminum to dissolve the solid aluminum. The present invention relates to an aluminum melting method and apparatus.

[0002]

2. Description of the Related Art Conventionally, in order to recycle aluminum chips and the like, the operations such as throwing the aluminum chips and the like into the molten aluminum and winding it up have been added.

[0003]

In the above-mentioned conventional method, since aluminum chips and the like are put on the molten aluminum, there is a problem that solid aluminum that does not immerse quickly burns and the regeneration yield of solid aluminum is significantly reduced. there were.

In order to prevent burning of the solid aluminum, it is sufficient to push the solid aluminum into the molten metal, but there is no suitable device for pushing the aluminum chips and the like, and simple stirring is not sufficient. There was no suggestion of such a means.

[0005]

However, according to the present invention, since a mixture of solid aluminum such as aluminum chips and molten aluminum multiplied by molten aluminum is fed into the molten aluminum, the solid aluminum melts without burning. That is, the above-mentioned conventional problems have been solved.

However, since a mixture of solid aluminum and molten aluminum is fed into the molten aluminum, troubles due to air inclusion that are likely to occur in this kind of operation can be prevented.

That is, the invention of the method is characterized in that molten aluminum is applied to the solid aluminum to be treated, and the solid aluminum and the molten aluminum are charged into a molten aluminum to continuously dissolve the solid aluminum. Is a method of melting recycled aluminum. In addition, solid aluminum is continuously fed to a fixed amount, and a predetermined amount of molten aluminum is applied from above to form a mixture of solid aluminum and molten aluminum, which is guided into the molten aluminum and extruded, and when the solid aluminum is fed. It is characterized in that it is heated to evaporate water, oil, etc., and the steam is secondarily burned.

Next, in the invention of the apparatus, a mixing pipe having an aluminum feeding part for receiving solid aluminum is installed on one side of the melting furnace, and the lower end of the mixing pipe is inserted below the level of the molten metal in the melting furnace. At the same time, one end of a molten aluminum discharge pipe is faced above the hopper, and the molten aluminum discharge pipe is connected to the discharge pipe. Further, the molten metal pump connects a supply / discharge pipe for pressurized gas to the upper part of the pump body that is submerged in the melting furnace, and connects the base end of the molten metal discharge pipe to the lower part of the pump body, and the tip of the discharge pipe. Is connected to a molten aluminum delivery pipe, and a suction pipe for sucking the molten aluminum in the melting furnace is connected to the base end side of the discharge pipe. Other devices are
On one side upper part of the melting furnace, a screw-containing feed pipe for feeding solid aluminum is installed, a solid aluminum feed part is continuously provided at the upper end of the feed pipe, and the lower end of the feed pipe is It is connected to the molten aluminum delivery pipe, the upper portion of the delivery pipe is connected to the discharge pipe of the molten metal pump, the lower portion of the delivery pipe is connected to the mixing pipe, and the lower portion is rushed into the molten aluminum for feeding. The apparatus for melting recycled aluminum is characterized in that a heating and combustion furnace for solid aluminum is connected to the upper part of the tube.

The pump for feeding the molten aluminum is not necessarily limited to the above structure.

As solid aluminum, in addition to aluminum chips, there are various aluminum containers, aluminum cans, and other wastes. The wastes of containers, cans, etc. are crushed into almost equal small pieces, and aluminum chips are cut. It is preferably dissolved in the form of a pellet.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Solid aluminum is continuously fed to the upper part of the melting furnace (for example, by using a screw conveyor) through a solid aluminum feeding part installed in the melting furnace and separately fed from the upper part. The sent molten aluminum is hung up to form a mixture, and the mixture is sent into the melting furnace through a mixing tube. In this case, the solid aluminum and the molten aluminum are mixed to form a mixture, so that they are relatively easily pushed into the molten aluminum and melted rapidly. In this case, since the air is shut off, even if the solid aluminum is heated to a high temperature, there is no danger of burning.

[0012]

Embodiment 1 An embodiment of the present invention will be described with reference to FIG.

The solid aluminum 1 is shredded by the shredder 2 and the shredded material or the aluminum chips 3 is fed into the mixing tube 6 of the melting furnace 5 by the screw conveyor 4 and is cut from the melting furnace 5. Show the molten aluminum sampled 7
As described above, the mixture is poured from the upper portion of the mixing tube 6 and poured onto solid aluminum. The molten aluminum obtained as described above is stored in the heat insulation furnace 8.

The amounts of solid aluminum and molten aluminum in the above are approximately equal.

The molten aluminum moving from the melting furnace to the heat retaining furnace in the above is automatically moved by overflow, for example.

[0016]

Second Embodiment Next, the apparatus of the present invention will be described with reference to FIGS.

In FIG. 2, a hopper 10 for receiving solid aluminum is installed at an upper part of one side of the melting furnace 9, and an upper end of the mixing tube 6 is connected to a lower part of the hopper 10, and a lower end part of the mixing tube 6 has the melting point. Insert it to the center of the furnace 9 and bend it laterally 6a (FIG. 3).

A delivery end of a molten aluminum delivery pipe 12 is exposed above the hopper 10, the other end of the delivery pipe 12 is connected to one end of a discharge pipe 13, and the other end of the discharge pipe 13 is a pump. It is connected to the lower part (discharging part) of the main body 14. At the upper part of the pump body 14, a pressurized gas pipe 15 is installed in the valve 1.
6, a hot water suction pipe 17 is connected to the lower portion of the discharge pipe 13. Reference numeral 11 in the figure is a shoot for overflow.

In the above embodiment, the aluminum chips 3 are fed by the screw conveyor 4 into the hopper 10 as shown by the arrow 18, and the molten aluminum is hung from the delivery pipe 12 as shown by the arrow 19. Three
The mixture of aluminum and molten aluminum passes through the mixing tube 6 as shown by the arrow 20 and is extruded into the central portion of the melting furnace 9 as shown by the arrow 21, and is heated from four turns to rapidly melt and become an aluminum molten metal. . When the molten metal surface 25 of the molten aluminum rises and reaches the entrance of the chute 22, the chute 22 descends as shown by the arrow 23 and enters the warming furnace 8 where it is stored.

On the other hand, since the pump main body 14 is inserted and installed in the melting furnace 9, the molten aluminum is sucked from the hot water suction pipe 17 connected to the discharge pipe 13 as shown by an arrow 24, and then into the pump main body 14. It enters the same level as the surface 25 of molten aluminum. Then, the valve 16 is opened, an inert gas (for example, nitrogen gas) is pushed in as shown by an arrow 26, and the aluminum molten metal surface in the pump main body 14 is depressurized. Then, the aluminum chips in the hopper 10 are applied through the delivery pipe 12 as shown by an arrow 19.

In the above description, when the molten metal surface inside the pump body 14 is pressed down and the molten aluminum inside the pump body 14 is pushed out, the molten aluminum is sent to the delivery pipe 12 side through the discharge pipe 13 and sucks hot water. There is no possibility of backflow from the pipe 17 side into the melting furnace 9.

When the valve 16 is opened to the outside, the molten aluminum suction pipe 17 is automatically sucked into the pump body 14, so that the level of the molten metal inside the pump body automatically reaches the level 25 of the melting furnace 9. Rise.

[0023]

Third Embodiment Another embodiment will be described with reference to FIGS.

A feed pipe 29 with a hopper 10 for receiving solid aluminum is installed on one side of the melting furnace 9, and a screw 30 is installed inside the feed pipe 29. The inlet pipe 29
The lower end of is connected to the mixing tube 6. An exhaust combustion furnace 31 is connected to an upper portion of the feeding pipe 29, and the combustion furnace 31
A burner 32 is installed in the container, and a smoke canister 33 is installed therein.

Further, one side of the molten aluminum delivery pipe 12 is connected to the mixing pipe 6, the other side is connected to the discharge pipe 13, and the other end of the discharge pipe 13 is connected to the pump body 14. In the figure, 15 is a pressurized gas pipe, and 16 is a valve. In the above-mentioned embodiment, when the screw 30 is rotated to push the aluminum chips as shown by the arrow 34 and the molten aluminum is fed from the pump body 14 to the mixing tube 6 as shown by the arrow 19, the aluminum is mixed in the mixing tube 6. Since the cutting chips and the molten aluminum are mixed to form a mixture and are extruded from the lower end of the mixing pipe 6 into the molten metal, the aluminum cutting chips are easily melted without burning.

The aluminum chips in the feeding pipe 29 are
It is dried by heating and exhausting the molten aluminum,
The water or oil mixed or adhering becomes a vapor and is exhausted as shown by arrow 35.
It goes inside and is burned. By sending a part of the combustion exhaust gas in the combustion furnace 31 into the central axis of the screw 30 to heat the aluminum chips, the water and the like attached to the aluminum chips can be reliably removed.

[0027]

According to the present invention, the solid aluminum is poured into the molten aluminum in the melting furnace after the molten aluminum is applied to the solid aluminum, so that the solid aluminum is free from the risk of burning and can be regenerated with a high yield. Further, in this way, the solid aluminum is easy to handle, and it is easy to push and melt it.

[Brief description of the drawings]

1 is a block diagram of the implementation of the method of the present invention.

FIG. 2 is a partially cutaway front view of the embodiment of the apparatus.

FIG. 3 is a right side view in which a part is also cut.

FIG. 4 is a plan view of the same.

FIG. 5 is a partially cutaway front view of another embodiment of the apparatus.

FIG. 6 is a left side view in which a part is also cut.

[Explanation of symbols] 1 solid aluminum 2 shredder 3 aluminum chips 4 screw conveyor 5 melting furnace 6 mixing tube 8 heat retaining furnace 9 melting furnace 10 hopper 11 chute 12 delivery pipe 13 discharge pipe 14 pump body 15 pressurized gas pipe 16 Valve 17 Hot water pipe 22 Chute 25 Hot water surface 29 Feed pipe 30 Screw 31 Combustion furnace 32 Burner 33 Smoke tube

Claims (5)

[Claims] 1. Regenerated aluminum, characterized in that molten aluminum is applied to the solid aluminum to be treated, and the solid aluminum and the molten aluminum are charged into a molten aluminum to continuously dissolve the solid aluminum. Melting method. 2. Solid aluminum is continuously fed to a fixed amount, and a predetermined amount of molten aluminum is applied thereto to form a mixture of solid aluminum and molten aluminum, which is then extruded by introducing it into the molten aluminum. The method for melting recycled aluminum according to claim 1, wherein when the aluminum is fed, it is heated to evaporate water, oil, etc., and the vapor is secondarily combusted. 3. A mixing pipe having an aluminum feed part for receiving solid aluminum at the top is installed on one side of the melting furnace, the lower end of the mixing pipe is inserted below the level of the molten metal in the melting furnace, and the hopper is provided. An apparatus for melting regenerated aluminum, characterized in that one end of a molten aluminum delivery pipe is exposed above, and the other end of the delivery pipe is connected to a discharge pipe of a molten metal pump. 4. The molten metal pump is connected to a supply / exhaust pipe for pressurized gas at the upper part of the pump body that is submerged in the melting furnace, and at the bottom of the pump body is connected at the base end of the molten metal discharge pipe. 4. The recycled aluminum according to claim 3, wherein the tip of the pipe is connected to a molten aluminum delivery pipe, and a suction pipe for sucking the molten metal in the melting furnace is connected to the base end side of the discharge pipe. Melting equipment. 5. A feeding pipe containing a screw for feeding solid aluminum is installed at an upper part of one side of the melting furnace, and a feeding part for solid aluminum is continuously provided at an upper end of the feeding pipe. The lower end of the delivery pipe is connected to a molten aluminum delivery pipe, the upper portion of the supply / delivery pipe is connected to the discharge pipe of the molten metal pump, the lower portion of the delivery pipe is connected to the mixing pipe, and the lower portion of the mixing pipe is connected. A molten aluminum melting apparatus characterized in that the molten aluminum molten metal is rushed into the molten aluminum molten metal and a solid aluminum heating / exhaust combustion furnace is connected to the upper portion of the feeding pipe.