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A recycling process of waste aluminum foil composite paper

A technology for recycling and processing paper, which is applied in the direction of electronic waste recycling, recycling technology, and process efficiency improvement. It can solve the problems of waste gas environmental pollution, waste of resources, etc., and achieve high separation efficiency, improve recovery rate, and reduce costs. Effect

Active Publication Date: 2021-07-09
曲靖宏程工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing aluminum foil recycling adopts high-temperature combustion method. High-temperature combustion will produce waste gas and pollute the environment, and secondly, some precious resources will be wasted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A process for recycling waste aluminum foil composite paper described in Example 1, comprising the following steps:

[0018] 1. Pulverization: Send the collected waste aluminum foil paper into a high-speed pulverizer for pulverization, and pulverize into cubes with block specifications. The block area of ​​the cubes is 50 cm 2 ;

[0019] ② Freezing: Put the cube prepared in step ① in a freezer and freeze it at -15°C for 2 hours. By freezing, the physical properties of the adhesive adhered between the aluminum foil and the paper can be changed;

[0020] ③Softening: Put the block frozen in step ② into the reaction kettle, and then put steam into the reaction kettle, and use the steam to heat the block for 30 minutes. The temperature of the steam is 100°C. Through heating and softening, the aluminum foil and The adhesive between the papers is softened, allowing the aluminum foil and paper to be peeled off in advance;

[0021] ④Primary separation: first prepare the separa...

Embodiment 2

[0029] A recycling process for waste aluminum foil composite paper described in Example 2 comprises the following steps:

[0030] 1. Pulverization: Send the collected waste aluminum foil paper into a high-speed pulverizer for pulverization, and pulverize into cubes with block specifications. The block area of ​​the cubes is 80 cm 2 ;

[0031] ② Freezing: Put the cube prepared in step ① in the freezer and freeze it at -10°C for 3.5 hours. By freezing, the physical properties of the adhesive adhered between the aluminum foil and the paper can be changed;

[0032] ③Softening: Put the block frozen in step ② into the reaction kettle, and then put steam into the reaction kettle, and use the steam to heat the block for 45 minutes. The temperature of the steam is 110°C, and the aluminum foil and The adhesive between the papers is softened, allowing the aluminum foil and paper to be peeled off in advance;

[0033]④Primary separation: first prepare the separating agent and water into ...

Embodiment 3

[0041] A kind of recycling process of waste aluminum foil composite paper described in the present embodiment 3 comprises the following steps:

[0042] 1. Pulverization: Send the collected waste aluminum foil paper into a high-speed pulverizer for pulverization, and pulverize into cubes with block specifications. The block area of ​​the cubes is 100 cm 2 ;

[0043] ② Freezing: Put the cube prepared in step ① in a freezer and freeze it at -5°C for 5 hours. By freezing, the physical properties of the adhesive adhered between the aluminum foil and the paper can be changed;

[0044] ③Softening: Put the block frozen in step ② into the reaction kettle, and then put steam into the reaction kettle to heat the block for 60 minutes. The temperature of the steam is 120°C. The aluminum foil and The adhesive between the papers is softened, allowing the aluminum foil and paper to be peeled off in advance;

[0045] ④Primary separation: first prepare the separating agent and water to form a...

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PUM

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Abstract

The invention discloses a process for recycling waste aluminum foil composite paper, which comprises the following steps: ① crush the collected waste aluminum foil paper into cubes with block specifications; ② place the cubes in a freezer to freeze; ③ send the frozen cubes Heating and softening in the reaction kettle; ④ Add the softened cube to the separation liquid for a separation to obtain pulp and aluminum foil materials; ⑤ Clean the pulp and aluminum foil materials; After treatment, it is used for papermaking; ⑦Grinding: the aluminum foil material is extruded and dehydrated and then ground to obtain aluminum foil particles; ⑧The aluminum foil particles are reacted with hydrochloric acid solution to obtain aluminum powder; ⑨Aluminum powder purification: send the aluminum powder into the purification system, Clean aluminum powder can be obtained by mixing, concentrating and vacuum drying. The invention has simple operation process, high separation efficiency, relatively pure product quality after recovery, and the whole production process is green, environment-friendly and pollution-free, and has extremely high economic value and significance of energy saving and emission reduction.

Description

technical field [0001] The invention belongs to the technical field of resource reuse, and in particular relates to a process for recycling waste aluminum foil composite paper. Background technique [0002] Aluminum foil composite paper is a material made of aluminum foil and paper. It has the advantages of moisture-proof, air-tight, light-shielding, corrosion-resistant, fragrant, non-toxic, tasteless, and beautiful appearance. It is widely used in food, tobacco and other products. Packaging, the production process of aluminum foil composite paper mainly includes gluing, compounding, drying, winding, stress relief and slitting processes. During the production process of aluminum foil composite paper and the process of packaging with aluminum foil paper, a large amount of fine scraps will be produced. These leftover materials are generally discarded directly, which not only causes waste of resources, but also pollutes the environment, which is not conducive to sustainable dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00C22B7/00C22B21/00
CPCB09B3/00B09B5/00C22B7/007C22B21/0069Y02W30/82Y02P10/20
Inventor 吴自德
Owner 曲靖宏程工贸有限公司