JPS61291933A - Manufacture of secondary metal from aluminum packaging material - Google Patents

Abstract

PURPOSE:To obtain high purity secondary metal, by treating scrap of aluminum packaging material by dry distillation stage for thermal decomposition, billet making stage, melting stage and the refining stage. CONSTITUTION:Scrap of composite piled aluminum foil packaging material as raw material is subjected to a process of thermal decomposition distillation for recovering aluminum foil and carbide by converting the material to oil and gas under a low temp. Next, recovered materials are separated to aluminum foil and carbon, these are subjected to billet making process, in which these are cut to decrease the vol., compacted then preheated. Next, the compacts are heated and stirred to powder them finely, exothermic high temp. thermit reaction agent is added thereto to melt aluminum foil in droplet state, and these are subjected to melting process for taking out liquid metal and ash by coagulation of the droplet. Next, liquid metal is fed to heated molten metal, these are killed and held at a fixed temp., oxidation inhibitor is scattered, and refining process for taking out and solidifying the metal is applied to obtain secondary metal.

Description

[Detailed description of the invention] B1 Technical field of the main proposal The present invention deals with industrial waste, waste, and plastics.

The present invention relates to a manufacturing method for producing a secondary aluminum ingot by precipitation from a composite laminated aluminum foil packaging material made of paper, cellophane, etc., and printed, colored, coated, etc. aluminum foil.

BACKGROUND OF THE INVENTION Conventionally, there is no way for waste composite laminated aluminum foil packaging materials to be reused by chemical treatment methods, and they are usually treated as so-called paid disposal items that are treated as waste.

C. Problems with conventional technology These are composite laminated materials such as plastic and paper.

Cellophane is extremely thick compared to aluminum foil, and if a simple combustion method were adopted, the internal aluminum foil would be additionally burned due to the high heat during combustion, and the remaining aluminum foil would also be oxidized, producing alumina (aluminum oxide). ), making it impossible to melt and reuse, and there is no example of commercial production.
Similar situations exist not only in Japan but also in other developed countries.

20. Purpose of the present invention The present invention attempts to overcome and eliminate the above-mentioned difficulties, and its purpose is to use the composite laminated aluminum foil packaging material and the high-purity secondary material of the aluminum. The goal is not to obtain money.

2. Main Points of the Proposal The present invention is characterized in that it produces a secondary metal in four steps: a dry distillation step for thermal decomposition, a billetizing step, a melting step, and a scouring step.

6 The example drawing of this proposal is a process diagram showing the production process leading to the precipitation of secondary metal by the manufacturing method of the present invention. Packaging made of aluminum foil scraps, paper, cellophane, or plastic film, and a composite laminated aluminum foil consisting of 2 to 6 layers of printed, colored, coated, etc., bonded by heat bonding or various adhesives. It is made of wood, usually thickness: 200 (μm)! l17 [
μm].

Those with a diameter of 7 to 9 [μm] are the most common, and these are collectively called.

These raw materials are then classified into laminates, which separate the raw materials according to their thickness, in order to obtain good results in the next process.

Next, pyrolysis dry distillation is a process in which the raw materials are dry distilled at a low temperature of about 400" CC1. In this process, paper, cellophane, plastics, adhesives, printed matter, etc. in the laminated materials are gasified by pyrolysis. and oiled.

The residue is recovered as aluminum foil and carbide.

Thirdly, billetization means that in preparation for the subsequent process, the collected material is mesh-separated into aluminum foil and carbon using a forward/reverse vibration separator, and then the aluminum foil is extruded in a compression container. After being compressed and reduced in volume.

This is a process in which the material is cut into required dimensions and processed into a billet-like solid material, and then preheated to approximately 300[deg.]C.

Fourthly, melting refers to heating and stirring the raw material, that is, a solid material that has been preheated and turned into a billet, and when it reaches approximately 5006 [C], the stirring rotation speed is increased and the solid material is pulverized into fine powder. urge,
An exothermic high-temperature thermite reactant is sprinkled and stirred into this, and it reacts with the aluminum foil, dissolving the aluminum foil in droplets and coagulating to form a liquid metal.

This is a process in which liquid metal and ash are extracted by utilizing the difference in specific gravity between them and the remaining ash.

Fifth, scouring means heating the molten metal to about 720° [C], adding the liquid metal to it, spraying and stirring a solvent, and going through the steps of deoxidizing, slag removal, and cleaning. While maintaining the temperature at a constant temperature of 709°C, an antioxidant is sprinkled on it, taken out at the same temperature, and solidified.Means for solidification include cooling with boiling water, heating again, and then cooling with water. 3. Finally, through each of the above steps, a high-purity aluminum base metal product is obtained.

Effects of the present invention The manufacturing method of the present invention includes each of the steps described above.Next, to describe its effects, the laminated and classified waste composite laminated aluminum foil packaging material, which is the raw material, is pyrolyzed and dry distilled. After being gasified and turned into oil, it is first recovered as aluminum foil and carbide, and this recovered material is divided into meshes to reduce its volume and cut into billet-like solids, that is, it is compressed to reduce its volume. Since it is reduced to a solid material, it is possible to prevent the oxidation effect that occurs during dissolution in the subsequent stage.Furthermore, it is preheated and billetized solid material, and an exothermic high-temperature thermite reactant is sprayed. , Aluminum is rapidly precipitated into droplets (spherical shapes) by the reactant.

The remaining ash is also removed, and in this way a highly pure aluminum base metal can be obtained.

According to the manufacturing method of the present invention, aluminum is originally a metal that is completely utilized because it is extremely easy to collect it as a scrap product after being used as a product, melt it, and reuse it, but the raw material in the present invention The aluminum foil present in the composite laminated packaging material is difficult to peel, which is unique to a composite laminate, and is poorly soluble due to its ultra-thin shape of 7 to 9 [μm]. , the high heat causes additional combustion, and the aluminum foil becomes alumina-like, and as a result,
This was a revolutionary manufacturing method that was able to clarify and eliminate both of the causes mentioned above, and the resulting product is also a high-purity secondary material with a purity of 99.3C% or higher. The fact that it is made of gold has already been certified by a recognized organization, and has an excellent effect of fully achieving the intended purpose of the present invention.

[Brief explanation of the drawing]

The drawings are process diagrams showing the production process leading to the precipitation of aluminum secondary metal by the manufacturing method of the present invention. Patent applicant: 1 person other than Chiyoda Yuka Engineering Co., Ltd.Drawings

Claims (1)

[Claims] A pyrolysis and dry distillation process in which composite laminated aluminum foil packaging material is used as a raw material, the raw material is gasified and oiled at low temperatures to recover aluminum foil and carbide, and the recovered material is separated into aluminum foil and carbon. A billetizing step in which the aluminum foil is cut to reduce its volume and made into a solid material, and then preheated, and the solid material is heated and stirred to form a fine powder, and an exothermic high-temperature thermite reactant is added thereto to form the aluminum foil into droplets. A dissolving process in which liquid metal and ash are extracted by melting and coagulation, and a scouring process in which the liquid metal is poured into heated melting water, kept at a constant temperature, sprinkled with an antioxidant, and taken out and solidified. A manufacturing method for producing secondary metal from aluminum packaging material consisting of .