Sorting type waste ring-pull can treatment system and process

Abstract

The invention discloses a sorting type waste zip-top can treatment system and process, and belongs to the field of aluminum product machining, the sorting type waste zip-top can treatment system comprises an unpacking module, a pretreatment module, a first magnetic separation module, a shredding module, a roller screening module, a second magnetic separation module, an eddy current separation module, a storage bin and a conveying and feeding system. According to the sorting type waste ring-pull can discharging system, unpacking, multi-stage magnetic separation, screening and eddy current separation are integrated through modular design, magnetic metal and non-metal substances in waste aluminum materials are efficiently removed, and the purity of the aluminum materials can be effectively improved.

Description

Technical Field

[0001] The invention belongs to the field of aluminum product processing and relates to a sorting type waste can processing system and process. Background Art

[0002] As a recyclable aluminum resource, the efficient recycling of used cans is of great significance to resource conservation and environmental protection. Existing processing technologies generally have the problems of low sorting purity and low metal recovery rate. Traditional processes usually use single magnetic separation or manual sorting, which is difficult to completely separate the magnetic metals (such as iron rings) and non-metallic impurities (plastics, labels, etc.) attached to the can body, resulting in a complex composition of subsequent smelting aluminum materials. In addition, the pretreatment process mostly relies on simple water washing or mechanical wiping, which has limited effect on the removal of oil stains and coatings, and the connection between the various processes is not smooth, relying on manual transportation, and the system continuity and automation are low, which restricts the improvement of processing efficiency and production capacity. Summary of the invention

[0003] The purpose of the present invention is to provide a sorting type waste can unloading system and process, which solves the problems of low purity of aluminum materials and poor system continuity in the process of recycling and reusing waste cans.

[0004] The technical solution adopted by the present invention is as follows: A sorting type waste can processing system, comprising an unpacking module, a pre-processing module, a first magnetic separation module, a shredding module, a drum screening module, a second magnetic separation module, an eddy current sorting module, a storage bin, and a conveying and feeding system; Unpacking module: including at least one unpacking machine to unpack the compressed packages of waste aluminum cans; Pretreatment module: Screening and removing impurities and surface decontamination of unpacked aluminum materials; The first magnetic separation module: the pre-treated aluminum material is subjected to the first magnetic separation, and then sent to the shredding module; Shredding module: includes at least one shredder to shred the aluminum material after magnetic separation; Drum screening module: The drum screening machine screens the shredded aluminum material to obtain debris with a particle size of less than 6mm and aluminum material with a particle size of ≥6mm; Second magnetic separation module: The drum magnetic separator magnetically separates aluminum materials with a particle size of ≥6mm to remove magnetic metals; Eddy current sorting module: The eddy current separator sorts the aluminum material after the drum magnetic separation and removes non-metallic materials; Storage bin; collects aluminum materials processed by eddy current sorting module; Conveying and feeding system: including belt conveyor, collecting conveyor belt, loading conveyor belt, chain conveyor and vibrating feeder, to realize material transportation between related modules and form a continuous sorting waste can processing system.

[0005] Furthermore, the first magnetic separation module includes a self-unloading iron remover and two relatively arranged discharging channels. The self-unloading iron remover is installed on the belt conveyor in the conveying and feeding system. The feeding end of the belt conveyor is communicated with the discharging part of the pretreatment module, and the discharging port of the belt conveyor is communicated with the connection point of the two discharging channels. Both discharging channels are inclined channels. The tops of the two discharging channels form a triangular structure through an arc-shaped structure. The lower ends of the discharging channels are discharging ports, and each discharging port is correspondingly communicated with a shredder. The discharging channels are chain plate conveyors.

[0006] Furthermore, the aluminum materials processed by the two shredders are gathered on the aggregate conveyor belt and then sent into the drum screening machine through the feeding conveyor belt communicated with the aggregate conveyor belt.

[0007] Furthermore, the conveying and feeding system between the drum magnetic separator and the drum screening machine includes an aggregate conveyor belt and a vibrating feeder connected in sequence. The drum screening machine sends the aluminum materials with a particle size ≥ 6 mm into the drum magnetic separator through the aggregate conveyor belt and the vibrating feeder.

[0008] Furthermore, the second magnetic separation module includes three drum magnetic separators. Each drum magnetic separator is communicated with the drum screening machine through an aggregate conveyor belt and a vibrating feeder. Each drum magnetic separator is correspondingly communicated with an eddy current separator. The materials are conveyed between the drum magnetic separator and the eddy current separator through a vibrating feeder. One of the three drum magnetic separators processes the aluminum materials with a particle size of 6 mm - 20 mm, one drum magnetic separator processes the aluminum materials with a particle size greater than 20 mm and within 60 mm, and one drum magnetic separator processes the aluminum materials with a particle size greater than 60 mm.

[0009] The processing technology of the sorting type waste aluminum can processing system described above includes the following steps: S1. The unpacking machine unpacks the tightly pressed package of waste aluminum cans, and after unpacking, pretreatment is carried out. S2. After pretreatment, the first magnetic separation is carried out. The materials after the first magnetic separation are shredded in different channels, and then aggregated. S3. The drum screening machine is used to screen the shredded materials to obtain debris with a particle size < 6 mm and aluminum materials with a particle size ≥ 6 mm. S4. The aluminum materials with a particle size ≥ 6 mm are subjected to drum magnetic separation to remove magnetic metals, and then eddy current separation is carried out to remove non-metallic substances to obtain aluminum storage materials.

[0010] Furthermore, in the pretreatment of step S1, it includes manual impurity removal and surface decontamination treatment. The surface decontamination treatment includes the following steps: conveying the aluminum material after manual impurity removal to the high-pressure spraying area, spraying a weak alkaline solution, controlling the spraying amount at 5-8 L / ton of aluminum material, standing for reaction for 60-90 seconds after spraying, and then performing cleaning, drying, and magnetic separation.

[0011] Further, the weak alkaline solution includes components with the following mass fractions: 0.6±0.1% NaOH, 0.8±0.1% H2O2, 0.2±0.05% surfactant, and the balance is deionized water, with a pH value of 9.5-10.5 and the temperature maintained at 40-50°C.

[0012] Further, the surfactant is fatty alcohol polyoxyethylene ether.

[0013] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows: 1. The sorting type waste aluminum can blanking system of the present invention integrates unpacking, multi-stage magnetic separation, screening, and eddy current separation through modular design, efficiently removing magnetic metals and non-metallic substances in waste aluminum materials, and can effectively improve the purity of aluminum materials; 2. The present invention uses a conveying and feeding system to achieve material conveying between modules, improving the continuity of the system; 3. The present invention uses a weak alkaline solution for surface treatment, mainly for efficiently softening and removing labels on the surface of aluminum materials without causing corrosion of aluminum materials, reducing the residual rate of labels, and avoiding a large amount of label residues from affecting the subsequent process effects. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts, where: Figure 1 is a process flow chart of a sorting type waste aluminum can treatment process; Figure 2 is a device diagram of the first magnetic separation module of the present invention; Markings in the figure: 1 - self-unloading iron remover, 2 - blanking channel, 3 - belt conveyor. Detailed Embodiments

[0015] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Generally, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0017] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0018] The features and performance of the present invention will be further described in detail below in conjunction with the embodiments.

[0019] Embodiment 1:

[0020] As Figure 1 、 Figure 2 shown, a sorting type waste aluminum can processing system provided by a preferred embodiment of the present invention includes an unpacking module, a pretreatment module, a first magnetic separation module, a shredding module, a drum screening module, a second magnetic separation module, an eddy current separation module, a storage bin, and a conveying and feeding system; Unpacking module: includes at least one unpacking machine for unpacking the tightly pressed package of waste aluminum cans; Pretreatment module: screens and removes impurities and performs surface decontamination on the unpacked aluminum material; First magnetic separation module: performs magnetic separation on the pretreated aluminum material and sends it to the shredding module after magnetic separation; Shredding module: includes at least one shredding machine for shredding the magnetically separated aluminum material; Roller screening module: The roller screening machine screens the shredded aluminum materials to obtain debris with a particle size < 6 mm and aluminum materials with a particle size ≥ 6 mm; Second magnetic separation module: The roller magnetic separator performs magnetic separation on the aluminum materials with a particle size ≥ 6 mm to remove magnetic metals; Eddy current separation module: The eddy current separator separates the aluminum materials after roller magnetic separation to remove non-metallic materials; Storage bin; It collects the aluminum materials processed by the eddy current separation module, and the aluminum materials are called aluminum storage materials; Feeding and conveying system: It includes a belt conveyor, an aggregate conveyor belt, a feeding conveyor belt, a chain plate conveyor, and a vibrating feeder, which realizes the material conveying between related modules and forms a continuous sorting type waste aluminum can processing system.

[0021] The first magnetic separation module includes a self-unloading iron remover 1 and relatively arranged double discharging channels 2. The self-unloading iron remover 1 is installed on the belt conveyor 3 in the feeding and conveying system. The feeding end of the belt conveyor 3 is communicated with the discharging part of the pretreatment module, and the discharging port of the belt conveyor 3 is communicated with the connection point of the double discharging channels 2. Both of the double discharging channels 2 are inclined channels. The top of the double discharging channels 2 forms a triangular structure through an arc structure. The lower ends of the double discharging channels 2 are discharging ports and are respectively communicated with a shredder. The discharging channel 2 is a chain plate conveyor.

[0022] The aluminum materials processed by the two shredders are collected on the aggregate conveyor belt and then sent into the roller screening machine through the feeding conveyor belt communicated with the aggregate conveyor belt.

[0023] The feeding and conveying system between the roller magnetic separator and the roller screening machine includes an aggregate conveyor belt and a vibrating feeder connected in sequence. The roller screening machine sends the aluminum materials with a particle size ≥ 6 mm into the roller magnetic separator through the aggregate conveyor belt and the vibrating feeder.

[0024] The second magnetic separation module includes three roller magnetic separators. Each roller magnetic separator is communicated with the roller screening machine through an aggregate conveyor belt and a vibrating feeder. Each roller magnetic separator is respectively communicated with an eddy current separator. The material is conveyed between the roller magnetic separator and the eddy current separator through a vibrating feeder; One of the three roller magnetic separators processes aluminum materials with a particle size of 6 mm - 20 mm, one processes aluminum materials with a particle size greater than 20 mm and within 60 mm, and one processes aluminum materials with a particle size greater than 60 mm; The nodes of 6, 20, and 60 mm in this application are just a conventional selection and can also be adjusted according to specific applications. The purpose of this application is to achieve three-stage processing for aluminum materials above 6 mm, combined with the splitting of debris less than 6 mm, forming four-stage sorting.

[0025] The processing technology of the described sorting-type waste aluminum can processing system includes the following steps: S1. The unpacking machine unpacks the tightly pressed package of waste aluminum cans, and performs pretreatment after unpacking; S2. After pretreatment, the first magnetic separation is carried out. The materials after the first magnetic separation are shredded through channels, and then aggregated after shredding; S3. Use a drum screening machine to screen the shredded materials to obtain debris with a particle size < 6 mm and aluminum materials with a particle size ≥ 6 mm; S4. Carry out drum magnetic separation on the aluminum materials with a particle size ≥ 6 mm to remove magnetic metals, and then carry out eddy current separation to remove non-metallic substances to obtain aluminum storage materials.

[0026] The pretreatment in step S1 includes manual impurity removal and surface decontamination treatment.

[0027] Example 2:

[0028] Based on Example 1, in this example, the surface decontamination treatment includes the following steps: The aluminum materials after manual impurity removal are transported to the high-pressure spraying area, and a weak alkaline solution is sprayed. The spraying amount is controlled at 5 - 8 L / ton of aluminum materials. After spraying, it is left to react for 60 - 90 seconds, and then washed, dried and subjected to magnetic separation.

[0029] The weak alkaline solution includes the following components by mass fraction: 0.6 ± 0.1% NaOH, 0.8 ± 0.1% H2O2, 0.2 ± 0.05% surfactant, and the balance is deionized water. The pH value is 9.5 - 10.5, and the temperature is maintained at 40 - 50 °C.

[0030] The surfactant is fatty alcohol polyoxyethylene ether.

[0031] The weak alkaline solution is prepared by the following method: At 40 - 50 °C, disperse fatty alcohol polyoxyethylene ether in deionized water, stir evenly, add NaOH, stir until completely dissolved, then cool back to 40 - 50 °C, and slowly add H2O2 under stirring, and continue to stir at 40 - 50 °C for 10 minutes to obtain the weak alkaline solution.

[0032] Comparative Example 1: Based on Example 1, the difference between this comparative example and Example 1 is that: A sorting-type waste aluminum can processing system provided in this comparative example does not include the first magnetic separation module, and the first magnetic separation is not carried out in the processing technology.

[0033] Comparative Example 2: Based on Example 1, the difference between this comparative example and Example 1 is that: A sorting-type waste aluminum can processing system provided in this comparative example does not include the second magnetic separation module, and the drum magnetic separation is not carried out in the processing technology.

[0034] Comparative Example 3: This comparative example is based on Example 1. The difference from Example 1 is that a sorting type waste aluminum can processing system provided in this comparative example does not include an eddy current separation module, and eddy current separation is not performed in the processing technology.

[0035] Test Example 1: Detect the purity of the aluminum storage materials prepared in Examples 1-2 and Comparative Examples 1-3, and detect the content of aluminum components; the detection method is the prior art, and the results are shown in Table 1.

[0036] Table 1 Purity Detection of Aluminum Storage Materials Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Purity of Aluminum Storage 99.5%-99.6% 99.8%-99.9% 93.2%-93.5% 94.1-94.2% 93.2%-93.3% The aluminum storage materials prepared by the present invention have a high purity.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, and improvements made by those skilled in the art within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sorting type waste aluminum can processing system, characterized in that, It includes an unpacking module, a pretreatment module, a first magnetic separation module, a shredding module, a drum screening module, a second magnetic separation module, an eddy current separation module, a storage bin, and a conveying and feeding system; Unpacking module: It includes at least one unpacking machine for unpacking the tightly pressed package of waste aluminum cans; Pretreatment module: Screen and remove impurities and perform surface decontamination on the unpacked aluminum material; First magnetic separation module: Perform the first magnetic separation on the pretreated aluminum material and send it to the shredding module after the first magnetic separation; Shredding module: It includes at least one shredding machine for shredding the magnetically separated aluminum material; Drum screening module: The drum screening machine screens the shredded aluminum material to obtain debris with a particle size < 6 mm and aluminum material with a particle size ≥ 6 mm; Second magnetic separation module: The drum magnetic separator performs magnetic separation on the aluminum material with a particle size ≥ 6 mm to remove magnetic metals; Eddy current separation module: The eddy current separator separates the aluminum material after drum magnetic separation to remove non-metallic materials; Storage bin; Collect the aluminum material processed by the eddy current separation module; Conveying and feeding system: It includes a belt conveyor, an aggregate conveyor belt, a feeding conveyor belt, a chain conveyor, and a vibrating feeder to realize the material conveying between related modules and form a continuous sorting type waste aluminum can processing system.

2. The sorting type waste aluminum can processing system according to claim 1, characterized in that: The first magnetic separation module includes a self-unloading iron remover (1) and relatively arranged double discharge channels (2). The self-unloading iron remover (1) is installed on the belt conveyor (3) in the conveying and feeding system. The feeding end of the belt conveyor (3) is connected to the discharge port of the pretreatment module, and the connection point of the discharge port of the belt conveyor (3) and the double discharge channels (2) is connected. Both double discharge channels (2) are inclined channels. The top of the double discharge channels (2) forms a triangular structure through an arc structure. The lower ends of the double discharge channels (2) are discharge ports and are respectively connected to a shredding machine. The discharge channels (2) are chain conveyors.

3. The sorting type used beverage can processing system according to claim 2, wherein: The aluminum material processed by the two shredding machines is collected on the aggregate conveyor belt and then sent into the drum screening machine through the feeding conveyor belt connected to the aggregate conveyor belt.

4. A sorting type waste aluminum can processing system according to claim 1, characterized in that: The conveying and feeding system between the drum magnetic separator and the drum screening machine includes an aggregate conveyor belt and a vibrating feeder connected in sequence. The drum screening machine sends the aluminum material with a particle size ≥ 5 mm into the drum magnetic separator through the aggregate conveyor belt and the vibrating feeder.

5. A sorting type waste aluminum can processing system according to claim 4, characterized in that: The second magnetic separation module includes three drum magnetic separators. Each drum magnetic separator is connected to the drum screening machine through an aggregate conveyor belt and a vibrating feeder. Each drum magnetic separator is respectively connected to an eddy current separator. The material is conveyed between the drum magnetic separator and the eddy current separator through a vibrating feeder; One of the three drum magnetic separators processes aluminum material with a particle size of 6 mm - 20 mm, one drum magnetic separator processes aluminum material with a particle size greater than 20 mm and within 60 mm, and one drum magnetic separator processes aluminum material with a particle size greater than 60 mm.

6. The processing technology of a sorting type waste aluminum can processing system according to any one of claims 1-5, characterized in that: It includes the following steps: S1. The unpacking machine unpacks the tightly pressed package of waste aluminum cans and performs pretreatment after unpacking; S2. Perform the first magnetic separation after pretreatment. The incoming material after the first magnetic separation is shredded in different channels and then aggregated; S3. Use a drum sieve to screen the shredded incoming material to obtain debris with a particle size < 6 mm and aluminum materials with a particle size ≥ 6 mm; S4. Conduct drum magnetic separation on the aluminum materials with a particle size ≥ 6 mm to remove magnetic metals, and then conduct eddy current separation to remove non-metallic substances to obtain aluminum storage materials.

7. The processing technology according to claim 6, characterized in that: In step S1 pre-treatment, it includes manual impurity removal and surface decontamination treatment; The surface decontamination treatment includes the following steps: Convey the aluminum materials after manual impurity removal to the high-pressure spray area, spray a weak alkaline solution, control the spray volume at 5 - 8 L / ton of aluminum materials, let it stand and react for 60 - 90 seconds after spraying, then conduct cleaning, drying, and then magnetic separation.

8. The processing technology according to claim 7, characterized in that: The weak alkaline solution includes components with the following mass fractions: 0.6 ± 0.1% NaOH, 0.8 ± 0.1% H2O2, 0.2 ± 0.05% surfactant, and the balance is deionized water, with a pH value of 9.5 - 10.5 and the temperature maintained at 40 - 50 °C.

9. The processing technology according to claim 8, characterized in that: The surfactant is fatty alcohol polyoxyethylene ether.

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