JPS60152639A - Device for recovering continuously aluminum base metal for laminated aluminum foil scrap - Google Patents

Abstract

PURPOSE:To recover an Al base metal which does not contain any laminating material without the danger of the operation and environmental hazard by dry-distillating the titled scraps at the melting temp. of the Al-component or below in a dry-distillation cylinder and supply the dry-distilled gas of the separated laminating material to a secondary heat source. CONSTITUTION:Laminated Al foil scraps are successively packed through a loading port 2 into the cavity part of a dry-distillation cylinder 1. The hot wind heated by heavy oil or the like as a heat source and supplied from a hot wind generator 21 through a hot wind duct 23 is introduced through an introducing port 17 at one aperture of a sheath 14 into an annular groove part 16. The part 16 is formed between the inside circumferential wall of the sheath 14 enclosing the cylinder 1 and lined with a refractory heat insulating material 15 and the outside circumferential wall of the cylinder 1. The hot wind flows in the part 16 in an arrow direction and is discharged through the evacuating port 18 of the aperture at the other end of the sheath 14. The above-described foil scraps in the cylinder 1 are thus dry distilled at the melting temp. of the Al-component or below and is separated to the dry-distilled gas of the laminated material and the Al base metal. The former is supplied to the device 21 through extracting pipes 19, 19..., a manihold 20 and a duct 22 and is utilized in place of the heavy oil.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous aluminum metal recovery device for laminated aluminum foil waste, which is new and has great industrial applicability.

Recently, laminated aluminum foil packaging has been widely used in a wide range of fields such as food, medicine, etc., and as a result, the amount of laminated aluminum foil waste after cutting the laminated aluminum foil into the required size and shape. It is a well-known fact that the number of aluminum alloys is increasing steadily, and that there is a long-awaited completion of a device that can effectively recover the high-purity aluminum metal contained in the aluminum foil scraps. It's true.

By the way, the gluing materials used in gluing aluminum foil are mainly synthetic polymeric substances such as polypropylene and polyethylene, and flammable substances such as wax and paper. There are major bottlenecks in the recovery and reclamation work of aluminum base and gold by heating and melting.

In other words, when bonded aluminum foil scraps are melted in the atmosphere with an oil or gas burner, the oxidation loss is large due to the characteristics of the thin aluminum foil and the extremely large number of surface species (almost no recovery effect is achieved). For this reason, conventional methods have mainly been adopted in which aluminum ingots are melted in advance to produce molten aluminum, and target aluminum foil scraps are immersed in the molten aluminum ice to provide heat. However, in this case, not only is it necessary for a skilled worker to immerse small amounts of aluminum foil scraps into the molten aluminum bath one after another, but also the multiple caps associated with the combustion of the above-mentioned flammable laminated material are required. Due to the generation of gas, the work is extremely dangerous and the possibility of environmental destruction is enormous, and the elimination of these drawbacks has been a concern in the industry.

Incidentally, today some aluminum powder is manufactured by finely pulverizing aluminum foil scraps without going through the above-mentioned melting process, but in such a method, the powdered material is Needless to say, it is unsuitable as a raw material for aluminum powder.

The object of the present invention is to fundamentally eliminate the drawbacks of the above-mentioned conventional methods and devices, and thereby to meet today's social and economic demands.

Next, the configuration of the present invention will be specifically explained with respect to one song showing one embodiment.

(1) is a carbonization cylinder which is the main part of the present invention, and FIG. ) and aluminum ingot discharge port (3) are opened, and the loaded laminated aluminum foil scraps are carbonized at a temperature below the melting temperature of the aluminum contained, and the carbonized gas of the laminated material and the aluminum ingot are separated. shall be separated.

In this case, the aluminum foil scrap loading port (2) is
For example, as shown in the figure, a guillotine damper (4
), and the guillotine damper (
It is preferable that the lintill (5) corresponding to 4) and the above be water-cooled to prevent thermal deformation and maintain sealing performance when closed.

(6) is an input port for aluminum foil scraps made into nodules;
(7) is a damper that is disposed in the hatch of the inlet (6) and is movable left and right; (8) is a plunger that has a push plate (9) at its tip; ), the aluminum foil waste is fed into the bottom-blocking inlet (6), and the damper (7) is opened, causing the aluminum foil waste to flow into the lower chamber Q.
The damper (7) then closes the bottom of the aluminum foil scrap inlet (6) again to cut off the atmospheric inflow into the lower chamber 00, and the guillotine damper (4) The input aluminum foil scraps are loaded into the cavity of the carbonization cylinder (1) through the aluminum foil scrap loading port (2), which is opened when the aluminum foil is lifted, by the pusher # (91), which moves forward in the left direction in Fig. 2. , After that, the pushing board (9) retreats and the aluminum foil scrap loading port (2
) will be closed.

In the apparatus of the present invention, the cavity of the carbonization cylinder (1) is filled with aluminum foil waste by repeating the above operation.

As shown in Fig. 2, the aluminum ingot discharge port (3) can be opened and closed by a plunger-type rod U8J that can freely move left and right, and has a backing plate (11) at its tip. A pushing plate (2) is attached to the rod, which can be freely pushed into the cavity of the carbonization cylinder (1) by horizontal movement.

In this case, if the aluminum metal outlet (3) and the backing plate (111) are water-cooled, thermal deformation can be prevented.
This is the reason for maintaining sealing performance during occlusion.

Next, (1) is a jacket which constitutes another essential part of the present invention, which surrounds the carbonization cylinder (1) and includes an inner circumferential wall lined with a fireproof insulation material (1ω) and the carbonization cylinder (1). An annular groove (1119) through which hot air flows is formed between the outer peripheral wall and the outer peripheral wall.

αη is a hot air inlet that is bored in the mantle 04 and opens at the end of the annular groove U; (181 is a hot air inlet that is bored in the mantle 04 corresponding to 1η), and The hot air introduced through the hot air inlet Uη, which is an exhaust port that opens at the other end of the groove 0e, flows through the annular groove (161
flows in the direction of the arrow in Figures 3 and 2, and the exhaust port (
In the process, the aluminum waste loaded in the carbonization tube (1) is carbonized, and the bonded material is thermally decomposed to produce carbonization gas, and the aluminum ingot is It separates the

OI...0 is a plurality of gas extraction tubes, one end of which opens into the cavity of the carbonization cylinder (1), and the other end of which opens into the manifold canopy from the circumferential wall of the mantle I side. It is.

A) is a hot air generator which, together with the above-mentioned carbonization 8(1) and mantle G41, constitutes the main part of the apparatus of the present invention, and is connected to the manifold (A) via a gas duct (2). (1) Hot air is generated using the carbonized gas discharged from the fuel as fuel, and the generated hot air is introduced into the hot air inlet ( ) 61 of the opening at one end of the annular groove Oe through the hot air tact. .

In this case, the initial heat source of the hot air generator 1eli) at the time of starting the device of the present invention is a general fuel such as heavy oil,
It goes without saying that self-combustion will continue due to the supply of carbonization gas and the introduction of air as the carbonization column (1) operates, and that the supply of the general fuel will be stopped accordingly.

In the apparatus of the present invention, as described above, the glued aluminum foil scraps are primarily filled into the cavity of the carbonization cylinder (1) via the aluminum foil scrap item (2), and in the process,
Hot air using a general twisting material such as heavy oil as a heat source is supplied from a hot air generator (Co., Ltd.) through a hot air duct (c) through a hot air inlet αη opened at one end of the mantle (141) to the annular groove (10). The nuclear hot air is introduced into the annular groove 0-
The hot air flows in the direction of the arrow in Figure 2 and is discharged from the exhaust port QID at the other end opening of the mantle A4, and in the flow process of the annular groove Q mountain, the temperature of the hot air is adjusted by the above mechanism and the hot air. The glued aluminum foil scraps loaded into the cavity of the carbonization tube (1) are carbonized at a temperature below the melting temperature of the aluminum content, thereby separating the carbonization gas of the carbonization material and the aluminum ingot.

In this case, as shown in FIG.
If the configuration is such that it faces e, the annular groove +1
The hot air introduced into the annular groove 61 flows in a spiral shape around the outside of the carbonization cylinder (1) in the direction of the 0 hot water outlet through the spiral fins, thereby increasing the residence time or stagnation in the annular groove (16) of the hot air. This is extremely effective because it lengthens the flow distance and improves heat transfer efficiency.

The carbonization gas generated in the cavity of the carbonization cylinder (1) is transferred to the hot air generator (Company) through the gas extraction tube (II), manifold (II) and gas duct (2) as described above. The hot air is supplied to the hot air generator (2) and used as a secondary heat source for the hot air generator (2).

The temperature control of the hot air incident on the carbonization cylinder (1) is controlled by the Is clause of the hot air supply amount by a hot air regulating damper (not shown) connected to the temperature needle and placed at an appropriate position.

The aluminum ingot separated and generated together with the carbonization gas in the carbonization column (1) is discharged from the aluminum ingot discharge port (3).
) is discharged into the lower chamber (a) that receives the aluminum metal discharge port (3), but in that case,
After the cavity of the carbonization tube (1) is filled with aluminum foil scraps, the aluminum ingots corresponding to each charged bar of new aluminum V15 scraps are sequentially discharged. As the loading port (2) closes, the rod moves forward, and the plate (1υ) at the tip of the rod closes the end of the carbonization cylinder (1), approximately 20011I1.
01, and then move only the pushing plate (131) forward to remove the remaining material in the cavity of the carbonization cylinder (1) by about 500 I
After pushing it deep into the I/I 11, return it to the position shown by the solid line in Figure 2, and then move the rod (12, backing plate 01) forward to the position shown by the solid line in Figure 2, and close the carbonization cylinder by the backing plate Uυ. (1) It is best to seal it tightly.

As is clear from the above configuration and operation, the device of the present invention has the following effects.

It is possible to very effectively recover pure aluminum ingots that can be used as raw materials for aluminum powder and the like for chemical reactions, and in this respect it has great industrial utility.

(b) Since the structure is designed to separate and remove flammable bonded materials, there is no risk of explosive combustion or gas generation even if the generated aluminum ingot is pushed into a molten aluminum bath. 131 points of safety and environmental integrity are outstanding.

(0) In the case of a bonded material such as polypropylene, polyurethane, etc., the carbonization heat energy can be obtained by about a fraction of the total calorific value of the carbonization gas,
Not only does it eliminate the need for other common fuels, but the remaining thermal energy can be used for other purposes, which has great economic benefits.

[Brief explanation of drawings]

Each of the drawings shows one embodiment of the apparatus of the present invention, and FIG. 1 is a detailed explanatory view of the present invention, and FIG. 2 is a longitudinal sectional view of the main part. In the drawing, (1) is the carbonization cylinder, (2) is the aluminum foil scrap loading port, (3) is the aluminum base metal discharge port, +14 is the jacket, (to) is the fireproof insulation material, aS is the annular groove, ( II...
,...(11 is a gas extraction pipe, Qυ is a hot air generator, @ is a gas duct, (2) is a hot air duct, and (Foundation) is a spiral fin. Patent applicant: Tsurumi Synthetic Furnace Co., Ltd., agent patent attorney Takashi Ito/Nori

Claims (1)

[Claims] 1. Aluminum foil scrap loading port (2) that can be opened and closed at both ends.
and an aluminum ingot discharge port (3), and carbonize the charged and bonded aluminum foil scraps at a temperature below the melting temperature of the aluminum content to separate the carbonized gas of the bonded material and the aluminum ingot. (1) Surrounding the carbonization cylinder (1), between the inner circumferential wall lined with a fireproof heat insulating material (151) and the outer peripheral wall for the carbonization cylinder, there is an annular groove through which hot air flows.
The carbonization gas discharged from the carbonization cylinder (1) through the outer mantle a0 and the plurality of gas extraction pipes α...Ql opening into the carbonization cylinder (1) is used as fuel. The generated hot air is passed through the hot air duct to the annular groove αω.
Continuous aluminum metal recovery equipment for laminated aluminum foil scraps, consisting of a hot air generator that supplies hot air. 2. An annular groove 061 on the outer peripheral wall of the carbonization cylinder (1)! The continuous aluminum metal recovery device for aluminum foil scraps mounted on a beam stand as claimed in claim 1, wherein a spiral fin is provided around the periphery.