WO2010050672A1 - Procédé pour récupérer de l’aluminium provenant de matériaux d’emballage par pyrolyse au plasma/gazéification - Google Patents

Procédé pour récupérer de l’aluminium provenant de matériaux d’emballage par pyrolyse au plasma/gazéification Download PDF

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Publication number
WO2010050672A1
WO2010050672A1 PCT/KR2009/005004 KR2009005004W WO2010050672A1 WO 2010050672 A1 WO2010050672 A1 WO 2010050672A1 KR 2009005004 W KR2009005004 W KR 2009005004W WO 2010050672 A1 WO2010050672 A1 WO 2010050672A1
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WIPO (PCT)
Prior art keywords
packaging material
plasma pyrolysis
plasma
aluminum
pyrolysis gasification
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PCT/KR2009/005004
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English (en)
Korean (ko)
Inventor
이민선
박재형
이동현
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(주)그룹오상
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Publication of WO2010050672A1 publication Critical patent/WO2010050672A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • C22B7/003—Dry processes only remelting, e.g. of chips, borings, turnings; apparatus used therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/0038—Obtaining aluminium by other processes
    • C22B21/0069—Obtaining aluminium by other processes from scrap, skimmings or any secondary source aluminium, e.g. recovery of alloy constituents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/0084—Obtaining aluminium melting and handling molten aluminium
    • C22B21/0092—Remelting scrap, skimmings or any secondary source aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C22B4/005—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys using plasma jets
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C22B4/08—Apparatus
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • C22B9/22—Remelting metals with heating by wave energy or particle radiation
    • C22B9/226—Remelting metals with heating by wave energy or particle radiation by electric discharge, e.g. plasma
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention relates to a resource regeneration method for recovering aluminum contained in a packaging material. More specifically, the aluminum component and alumina (aluminum oxide) contained in the packaging material can be recovered more efficiently through gasification melting by plasma pyrolysis. It relates to a method for recovering aluminum of the packaging material.
  • Aluminum is widely used as a packaging material in that food preservation is excellent and thus a safe hygiene state can be maintained for a long time.
  • aluminum used in the packaging material it is used together with paper or plastic (polyester, polystyrene, polypropylene) or the like, or as a single material in the form of a thin film foil.
  • Aluminum used in such a packaging material is particularly suitable for food preservation in that it prevents oxygen permeation in the air and is excellent in UV blocking effect.
  • packaging material containing aluminum examples include a vapor deposition type packaging material in which a thin film is deposited on a synthetic resin, and a composite layer packaging material such as tetrapack composed of several composite layers such as paper, synthetic resin, and aluminum thin film. These packaging materials are widely used as packaging materials for dry food and packaging materials such as liquids.
  • the aluminum used in the packaging material having a thin film layer or foil type has a large surface area compared to the thickness, so that the surface of the aluminum surface is in contact with air.
  • the surface of aluminum is oxidized to form an alumina layer (aluminum oxide layer; Al 2 O 3 layer). Since the alumina layer has a very fine surface and excellent resistance to corrosion, the alumina layer can significantly increase the preservation of food, particularly liquid food.
  • the packaging material containing alumina has the advantage of increasing the preservation power of the food, but has a disadvantage in that it is quite disadvantageous in terms of resource recycling.
  • the melting point of the structure reaches approximately 1700 ° C due to the compactness of the structure. Accordingly, there is a disadvantage that a considerable amount of energy is consumed in order to melt the packaging material including alumina and reduce it to aluminum. Due to these disadvantages, there is a problem in that the efficiency of resource recycling is drastically lowered.
  • This problem occurs not only in the case of regenerating packaging materials, aluminum cans, etc., but also in regenerating aluminum oxide generated during the refining process of aluminum ore.
  • the present invention has been proposed to solve the above problems, and an object of the present invention is to provide a method for recovering aluminum of a packaging material which enables more efficient resource regeneration, in particular extraction and recovery of aluminum, through gasification melting by plasma pyrolysis.
  • the plasma pyrolysis gasification furnace and the plasma pyrolysis gasification melting furnace having a plasma torch therein and having an outlet for extracting the aluminum melt of the packaging material containing alumina to the outside.
  • the inflow step may include a chopping step of crushing the packaging material, and an input step of compressing the crushed packaging material and introducing the compressed packaging material into the plasma pyrolysis gasification melting furnace.
  • the plasma pyrolysis step In the aluminum recovery method of the packaging material by the plasma pyrolysis gasification, the plasma pyrolysis step, the base pyrolysis step of pyrolyzing the packaging material base of the packaging material to generate a reducing gas atmosphere, and the reducing gas generated in the base pyrolysis step
  • An aluminum melting step for melting the alumina into aluminum in the atmosphere may be provided.
  • the method may further include a pretreatment step including a cleaning step of cleaning the packaging material and a drying step of drying the cleaned packaging material before the inflow step.
  • the dosing step may include a screw compression process.
  • the plasma pyrolysis gasification apparatus is further provided with a vacuum pump, the injecting step further comprises a vacuum pumping step of discharging the air in the packaging material is compressed and pulverized by the vacuum pump It may be provided.
  • the plasma pyrolysis gasification apparatus further comprises a waste gas processing unit for processing the waste gas generated after pyrolysis in communication with the plasma pyrolysis gasification furnace, after the aluminum extraction step
  • a waste gas treatment step of discharging and treating the waste gas remaining in the plasma pyrolysis gasification furnace may be further provided.
  • the aluminum recovery method of the packaging material by the plasma pyrolysis gasification according to the present invention having the configuration as described above has the following effects.
  • FIG. 1 is a schematic configuration diagram of a plasma pyrolysis gasification apparatus according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method for recovering aluminum of a packaging material by plasma pyrolysis gasification by a plasma pyrolysis gasification apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic partial cross-sectional view of an example of a packaging material introduced into the plasma pyrolysis gasification apparatus by the aluminum recovery method of the packaging material by the plasma pyrolysis gasification according to an embodiment of the present invention.
  • FIG. 1 is a schematic configuration diagram of a plasma pyrolysis gasification apparatus 10 for recovering aluminum of a packaging material according to an embodiment of the present invention
  • Figure 2 is a plasma pyrolysis gasification apparatus 10 according to an embodiment of the present invention
  • Figure 3 is a schematic flowchart of a method for recovering the packaging material aluminum
  • Figure 3 to Figure 5 is a detailed flow chart of the more specific steps with respect to FIG.
  • Plasma pyrolysis gasification apparatus 10 for implementing the aluminum recovery method of the packaging material by the plasma pyrolysis gasification according to an embodiment of the present invention, has an inlet 100 and the plasma pyrolysis gasification melting furnace 300. In some cases, the input unit 200, the waste gas treatment unit 400 and the heat exchanger 500 may be further provided. The plasma pyrolysis gasification apparatus 10 according to the present embodiment will be described in the case where all of them are provided.
  • the plasma pyrolysis gasifier 10 includes aluminum from a packaging material 1 (see FIG. 6) provided with aluminum or alumina and a base provided to the plasma pyrolysis gasification melting furnace 300 via an inlet 200 and an inlet 100. Extract and recover.
  • a packaging material 1 including aluminum or alumina and a base is provided through the inlet 100.
  • the packaging material 1 includes a packaging base 2 and aluminum 3 or alumina (Al 2 O 3 , 4) provided on one surface of the packaging base 2.
  • the packaging base 2 includes a fibrous paper or synthetic resin such as PP (polypropylene, polyprophylene) and PE (polyethylene, polyethylene).
  • the packaging material 1 is a synthetic resin in which an aluminum layer formed by depositing aluminum having a thickness of about 10 to 50 ⁇ m, which is about 1/10, is formed on a base such as PP and PE having a thickness of about 100 to 500 ⁇ m, such as a packaging material for snacks and coffee mixes. Base packaging material is included.
  • a composite base packaging material in which a liquid-acceptable lipid and a synthetic resin such as PP / PE and an aluminum layer are formed in a form of a foil layer.
  • the surface of the aluminum layer is formed of an oxide film by contact with air, that is, an aluminum oxide layer (alumina, Al 2 O 3 ), which makes the surface dense and prevents oxidation.
  • the packaging material with aluminum (aluminum layer) in which alumina is formed in the surface is used widely as a food packaging material by preventing oxygen permeation and being excellent in the ultraviolet blocking effect.
  • the inlet 100 may be provided with a tumbler 110.
  • the packaging material 1 introduced into the tumbler 110 is forcibly rotated in the inner space of the rotating tumbler 110. At this time, foreign matter on the packaging material 1 is removed.
  • the inlet 100 may include a cleaner 110a and a dryer 110b.
  • a cleaner 110a and a dryer 110b On one surface of the packaging material 1 used as the food packaging material, foreign matter such as food or soil may be attached during contact or loading and transport with food or the like.
  • the packaging material 1 introduced into the cleaner 110a through the conveyor transfer line 120 is removed with foreign matter on the packaging material 1 while being cleaned by water or a cleaner in the cleaner 110a.
  • the downstream of the cleaner (110a) is connected to the dryer (110b), the packaging material 1 is removed from the cleaner (110a) (1) is introduced into the dryer (110b) to remove moisture.
  • the dryer 110b may be a heated or hot air dryer, but is not limited thereto, and dryers of various structures may be used according to the processing capacity and design specifications of the packaging material 1.
  • an additional base may be further supplied through the inlet 100. That is, an additional base may be supplied to the inlet portion 100 implemented by the tumbler 110 along a line denoted by reference number B of FIG. 1.
  • the supply of such additional base is for producing a reducing gas of CO and H 2 when the base is insufficient when forming a reducing atmosphere in the plasma pyrolysis step described below.
  • the input unit 200 is disposed downstream of the inlet unit 100 to transfer the packaging material 1 introduced from the inlet unit 100 to the plasma pyrolysis gasification melting furnace 300.
  • the input unit 200 includes a chopper 210 and a screw compressor 220.
  • the packaging material 1 delivered from the inlet 100 is crushed in the chopper 210 and compressed in the screw compressor 220 to be delivered to the plasma pyrolysis gasification melting furnace 300.
  • the chopper 210 is provided with a blade that rotates or moves to crush the packaging material 1 introduced into the chopper 210 into a predetermined size. Through the pulverization process in the chopper 210, the inflow to the plasma pyrolysis gasification melting furnace 300 may be increased.
  • the packaging material 1 crushed by the chopper 210 is introduced into the screw compressor 220 and then compressed and introduced into the plasma pyrolysis gasification melting furnace 300.
  • the screw compressor 220 includes a compressor inlet 221 for introducing the pulverized packaging material 1, and includes a compressor drive shaft 223 and a compressor drive shaft 223 that are operated by a compressor driver (not shown).
  • the compressor drive blade 225 which is arrange
  • Compressor drive blade 225 is a crushed packaging material that is formed in a structure in which the spacing of the compressor drive blade 225 in the direction from the compressor inlet 221 toward the compressor outlet 227, that is, the span, is reduced. (1) is compressed. Accordingly, the weight per unit volume of the packaging material 1 may be increased to increase the amount introduced into the plasma pyrolysis gasification melting furnace 300.
  • the packaging material crushed by the screw compressor 220 is introduced into the plasma pyrolysis gasification melting furnace 300 in units of compressed blocks or lines.
  • the input unit 200 may further include a vacuum pump 230 in addition to the chopper 210 and the screw compressor 220. That is, the vacuum pump 230 may be further provided in the inlet 200, and the vacuum pump 230 may be arranged to be in fluid communication with the screw compressor 220. When the vacuum pump 230 is operated, air in the internal space of the screw compressor 220 which is in fluid communication with this may be forced out to further improve the spatial compression efficiency of the pulverized packaging material 1. Accordingly, the amount of the pulverized packaging material 1 per unit volume flowing into the plasma pyrolysis gasification melting furnace 300 can be further increased.
  • the plasma pyrolysis gasification melting furnace 300 includes a plasma pyrolysis gasification melting furnace body 301, a plasma torch 310, and a plasma power supply 330.
  • a discharge valve 320 is mounted below the plasma pyrolysis gasification furnace body 301.
  • the plasma pyrolysis gasification furnace body 301 has an inner space At, in which the compressed crushing packaging material is disposed.
  • a plasma torch 310 is disposed at an upper end of the plasma pyrolysis gasification furnace body 301, and one side of the plasma pyrolysis gasification furnace body 301 is configured to be in fluid communication with the oxygen supply unit 340.
  • the plasma torch 310 is connected to the plasma power source 330 to provide a heat source for plasma generation in an inner space of the plasma pyrolysis gasification furnace body 301 using power from the plasma power source 330.
  • the oxygen supply unit 340 supplies oxygen to the inner space At to form an oxygen atmosphere.
  • the discharge valve part 320 disposed below the plasma pyrolysis gasification furnace body 301 opens and closes the discharge port 303 formed at the bottom of the plasma pyrolysis gasification furnace body 301.
  • the discharge valve unit 320 includes a discharge valve 321 and a discharge valve actuator 323.
  • the discharge valve 321 is disposed to be variable on a flow path formed inside the discharge port 303, and the discharge valve actuator 323 is disposed outside the discharge port 303.
  • the rotating shaft of the discharge valve actuator 323 is connected to the discharge valve 321, the discharge valve 321 is operated by the operation of the discharge valve actuator 323.
  • the discharge valve 321 operated according to the operation of the discharge valve actuator 323 adjusts the degree of opening and closing of the internal flow path of the discharge port 303.
  • Aluminum (Al) melted in the inner space At of the plasma pyrolysis gasification furnace body 301 is collected at the lower portion of the plasma pyrolysis gasification furnace body 301 by its own weight, and according to the operation of the discharge valve part 320. It is extracted to the outside.
  • the plasma pyrolysis gasification melting furnace 300 is connected to the waste gas processing unit 400, and the waste gas processing unit 400 discharges waste gases generated after the reduction endothermic reaction in the plasma pyrolysis gasification melting furnace 300 to the outside.
  • the waste gas processing unit 400 allows the waste gas including CO 2 generated after the reduction endothermic reaction in the plasma pyrolysis gasification melting furnace 300 to pass through before being discharged to the outside, so that the toxic substances remaining in the waste gas are discharged into the atmosphere. To prevent pollution.
  • the plasma pyrolysis gasifier 10 may further include a heat exchanger 500 for regenerating waste heat.
  • the heat exchanger 500 is disposed between the plasma pyrolysis gasification melting furnace 300 and the waste gas treatment unit 400, and the pyrolysis gasification melting furnace 300 and the waste gas treatment unit 400 are in fluid communication with the waste gas line 410. do.
  • the heat exchanger 500 is disposed on the waste gas line 410, and the heat exchanger 500 is disposed through the heat exchanger 500.
  • the waste gas line 410 and the heat exchange line 510 are disposed on the heat exchanger 500 so as to face each other to allow heat transfer between the two.
  • a heat regeneration device such as a nozzle, a turbine, and a pump may be further provided at an end side of the heat exchange line 510.
  • Plasma pyrolysis gasification apparatus 10 may further include a control unit 20.
  • the controller 20 may further include a separate storage and arithmetic unit.
  • the control unit 20 includes a storage unit and arithmetic unit.
  • the control unit 20 includes a tumbler 110 / cleaner 110a and a dryer 110b, a chopper 210, a screw compressor 220, a vacuum pump 230, a plasma torch 310, and a discharge valve unit 320. ), The plasma torch 310 and the waste gas treatment unit 400 are electrically connected.
  • control unit is electrically connected to a control valve (not shown) disposed on a line such as a compressor driver (not shown) and a waste gas line 410 included in the screw compressor 210, and the like. Can control the operation of.
  • the controller is electrically connected to a plasma detection unit (not shown) that detects an internal temperature of the plasma pyrolysis gasification furnace 300, and the like, and an internal operation state of the plasma pyrolysis gasification furnace 300 is based on a currently detected signal. You can also control.
  • the packaging material plasma pyrolysis method includes a plasma pyrolysis gasification apparatus providing step (S100), an inflow step (S200), a plasma pyrolysis step (S300), and an aluminum extraction step (S400). ) May be further provided.
  • the plasma pyrolysis gasification apparatus 10 is provided. Since the plasma pyrolysis gasification apparatus 10 has been described above, a detailed description thereof will be omitted.
  • the packaging material 1 including aluminum or alumina is transferred from the inlet part 100 toward the plasma pyrolysis gasifier 10.
  • Inlet portion 100 is configured as a tumbler 110 as described above can remove the foreign matter attached to the packaging material 1 by its own weight or rotational force.
  • the inlet part 100 may include the cleaner 110a and the dryer 110b, so that the inflow step S200 may include the cleaning step S210 and the drying step S220.
  • the packaging material 1 is introduced into the cleaner 110a, and the injected packaging material 1 is rotated in the water or the detergent sprayed from the cleaner 110a to remove foreign matters from the packaging material 1.
  • the moisture or water present in the space between the packaging material 1 is completely removed to prevent corrosion of the mechanical device that later comes into contact with the packaging material.
  • the inflow step further includes a cleaning step and a drying step, deterioration of operating conditions in the plasma pyrolysis gasification process can be prevented.
  • the inflow step S200 may further include a chopping step S230 and an input step S240. That is, the packaging material 1 from which foreign matters are removed in the washing and drying step is transferred to the chopper 210 and pulverized to a predetermined size (S230), and the pulverized packaging material is transferred from the chopper 210 to the screw compressor 220. After being compressed (S240), the chopping and adding step (S230, S240) to increase the weight per unit volume to perform a more efficient aluminum extraction process.
  • a chopping step S230 and an input step S240 That is, the packaging material 1 from which foreign matters are removed in the washing and drying step is transferred to the chopper 210 and pulverized to a predetermined size (S230), and the pulverized packaging material is transferred from the chopper 210 to the screw compressor 220. After being compressed (S240), the chopping and adding step (S230, S240) to increase the weight per unit volume to perform a more efficient aluminum extraction process.
  • the plasma pyrolysis gasification apparatus 10 may further include a vacuum pump S230, and the vacuum pumping may be performed simultaneously in the input step S240. That is, by the vacuum pump 230 disposed in one side of the screw compressor 220 and in fluid communication, it is possible to form a stronger vacuum state during the compression of the crushed packaging material. As such, when a vacuum atmosphere is formed during compression, when the pulverized packaging material is introduced, the space between the pulverizing packaging materials compressed by the compressor drive blade 225 of the screw compressor 220, that is, the volume due to air inflow into the voids The increase can be prevented. In addition, in the plasma pyrolysis step (S300) to be described later it is possible to form a precisely controllable operating state.
  • feeding step S240 according to the present embodiment is illustrated as being made through a screw compression process, this is merely an example for describing the present invention. In some cases, various modifications are possible according to design specifications such that the crushed packaging material is compressed through a piston process and transferred to the plasma pyrolysis gasification melting furnace 300.
  • a plasma pyrolysis step S300 is performed. That is, the pulverized compressed packaging material introduced into the plasma pyrolysis gasification melting furnace 300 is formed through the plasma formed in the plasma torch 310 disposed on the upper end of the plasma pyrolysis gasification melting furnace body 301 of the plasma pyrolysis gasification melting furnace 300. Pyrolysis causes the desired aluminum to melt. The molten aluminum collected at the lower end of the plasma pyrolysis gasification furnace body 301 is discharged to the outside by operating the discharge valve 321 by the operation of the discharge valve actuator 323 operated according to the control signal of the control unit 20. .
  • the plasma pyrolysis step (S300) may optionally include a base pyrolysis step (S310) and aluminum melting step (S320).
  • the packaging material base 2 including synthetic resin such as PE, PP, or the like attached to the packaging material 1 crushed and compressed in the base pyrolysis step S310 is gasified by plasma pyrolysis.
  • this base pyrolysis step (S310) pyrolysis gas is generated into a heat source formed by a plasma torch or the like, and Syn gas is generated. About 80% of the Syn gas is formed of a reducing gas such as CO, H 2, or the like.
  • the aluminum melting step (S320) aluminum other than the packaging material base 1 pyrolyzed in the packaging material by the heat source continuously provided by the plasma is melted by the provided heat source to form the internal space of the plasma pyrolysis gasification melting furnace 300 ( At the bottom of At). That is, when the temperature of the inner space At of the plasma pyrolysis gasification melting furnace 300 reaches approximately 700 ° C. by the continuous heat source, aluminum is melted and collected adjacent to the outlet 303 lower portion of the plasma pyrolysis gasification melting furnace 300. Lose.
  • the aluminum melting step (S320) includes a melting step of not only aluminum but also alumina (aluminum oxide).
  • a reducing gas such as C and H 2 generated by pyrolysis of the packaging base
  • a reducing atmosphere is formed in the inner space At of the plasma pyrolysis gasification melting furnace 300, and the endothermic reaction proceeds by a sufficiently supplied heat source.
  • alumina (Al 2 O 3 ) formed on the surface of the alumina or aluminum constituting the packaging material 1 together with the packaging material base 2 of the packaging material 1 is reduced to aluminum through the following reaction process. .
  • the reduction process of alumina (aluminum oxide) under a predetermined reducing atmosphere can be performed. Accordingly, the alumina (alumina oxide) can be smoothly melted even at a temperature lower than a high temperature of about 1700 ° C, in which the alumina is typically melted.
  • the molten aluminum in the aluminum melting step (S320) is collected in the lower portion of the plasma pyrolysis gasification melting furnace 300, the aluminum is discharged to the outside in the aluminum extraction step (S400).
  • a discharge port 303 is formed below the plasma pyrolysis gasification furnace body 301, and the discharge port 303 is opened and closed by the discharge valve part 320.
  • the discharge valve actuator 323 of the discharge valve unit 320 operates according to the control signal of the control unit 20, and the discharge valve 321 disposed on the discharge port 303 according to the operation of the discharge valve actuator 323 is provided. When driven, the molten and reduced melt aluminum can be discharged to the outside.
  • waste gas treatment for safely discharging the waste gas including CO 2 and H 2 O generated in the base pyrolysis step (S310) and aluminum melting step (S320) of the packaging base in the plasma pyrolysis gasification furnace to the outside Step S500 may be further provided. Accordingly, the aluminum recovery method of the packaging material by plasma pyrolysis gasification can be carried out a safer and more environmentally friendly process.
  • a heat regeneration step for utilizing waste heat may be further provided.
  • the waste gas discharged from the plasma pyrolysis gasification furnace 300 includes a significant heat capacity.
  • the heat exchange line 510 is disposed to pass through the waste gas line 410 and the heat exchanger 510 which are transmitted to the waste gas treatment unit 400, the water flowing through the heat exchange line 510.
  • Heat may be transferred to a working fluid such as
  • thermal regeneration devices such as nozzles, turbines and pumps in fluid communication with the heat exchange line 510, it is possible to regenerate significant thermal energy emitted from the plasma pyrolysis gasification furnace.
  • the operation and the flow of the working fluid, such as the pump of the thermal regeneration device can be determined whether or not to run according to the control signal of the controller.
  • the heat exchange process with such a heat exchanger and a heat exchange line may be variously modified according to design specifications, such as to be made after passing through the waste gas treatment unit 400 although not shown in the drawing.
  • the present invention is to recover aluminum from a packaging material containing aluminum or alumina, aluminum oxide (alumina) generated during regeneration of aluminum cans or aluminum oxide (alumina) generated during aluminum refining, and the like. Widely used in the resource recycling industry.

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Abstract

L’invention concerne un procédé pour récupérer de l’aluminium provenant de matériaux d’emballage par pyrolyse au plasma/gazéification. Ledit procédé comprend les étapes suivantes : utilisation d’un appareil de pyrolyse au plasma/gazéification comprenant un four de pyrolyse au plasma/gazéification doté à l’intérieur d’une torche à plasma, une partie sortie pour évacuer l’aluminium de matériaux d’emballage fondu vers l’extérieur, et une partie entrée pour alimenter le four de pyrolyse au plasma/gazéification en matériaux d’emballage; introduction, par la partie d’entrée, des matériaux d’emballage dans le four de pyrolyse au plasma/gazéification; pyrolyse au plasma au moyen de la torche à plasma dans le four de pyrolyse au plasma/gazéification en fonction de l’émission d’un signal de commande provenant d’une unité de commande pour décomposer thermiquement les matériaux d’emballage; et extraction de l’aluminium fondu pendant l’étape de pyrolyse au plasma.
PCT/KR2009/005004 2008-10-30 2009-09-04 Procédé pour récupérer de l’aluminium provenant de matériaux d’emballage par pyrolyse au plasma/gazéification WO2010050672A1 (fr)

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KR20080107243A KR100910630B1 (ko) 2008-10-30 2008-10-30 포장재 플라즈마 열분해 가스화 용융 알루미늄 회수 방법
KR10-2008-0107243 2008-10-30

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