CN111735732A - Method for testing copper content of plastic particles of dry copper rice mill - Google Patents
Method for testing copper content of plastic particles of dry copper rice mill Download PDFInfo
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- CN111735732A CN111735732A CN202010631518.0A CN202010631518A CN111735732A CN 111735732 A CN111735732 A CN 111735732A CN 202010631518 A CN202010631518 A CN 202010631518A CN 111735732 A CN111735732 A CN 111735732A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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Abstract
The invention discloses a method for testing the copper content of plastic particles of a dry copper rice mill, which comprises the following steps: s1, sampling, and taking plastic particles with the mass S in a packaging bag filled with the plastic particles as a test sample; s2, separating, wherein the separating step comprises the following steps: s2.1, mixing a test sample and a separation solution in a first container; s2.2, pouring out the solid-liquid mixture in the first container, and leaving the cup bottom mixture in the first container. And S3, weighing, and weighing the mixture at the bottom of the cup. And S4, calculating the copper content. The method for testing the copper content of the plastic particles of the dry type copper rice machine can effectively separate the copper rice from the plastic particles and accurately measure the copper rice, so that the copper content of the plastic particles prepared by the dry type copper rice machine can be conveniently and accurately measured. In addition, the density of the separation liquid adopted in the invention is higher than that of water, so that plastic particles and copper rice particles can be better separated, and the detection accuracy is improved.
Description
Technical Field
The invention relates to a method for testing copper content, in particular to a method for testing copper content of plastic particles of a dry copper rice mill.
Background
The copper rice machine is a machine for crushing waste copper wires and separating copper and plastics, and the separated copper is like rice grains, so the copper rice machine is called as the copper rice machine. In recent years, the environment protection strength is enhanced by the nation, the recovery of the waste cables can not only generate higher income, but also change waste into valuable and reduce the environmental pressure, thereby being widely used. In general, the copper rice mill is classified into a dry copper rice mill and a wet copper rice mill, and the wet copper rice mill has a serious environmental pollution due to a large amount of water used in a production process to separate copper rice and plastic particles (e.g., PE, PVC), and thus the dry copper rice mill is currently used more.
The dry copper rice machine can separate waste copper wires into copper rice and plastic particles, but the waste copper wires cannot be completely separated, the copper rice can be mixed in the plastic particles, and the processed plastic particles are recycled, so that a buyer does not want to contain excessive copper rice; the seller also hopes that the lower the copper content in the plastic granules, the better, and therefore the copper content in the separated plastic granules is an important index for evaluating the mechanical performance of the dry copper granules. Meanwhile, the change of the copper content can reflect the change of the running performance of the dry copper rice mill, and the monitoring of the state of equipment is facilitated.
In the prior art, when testing the copper content of plastic particles, water is usually used to separate copper from plastic, but some of the plastic particles have a higher density, for example, plastic particles made of PVC, which has a density of 1.4g/cm3The separation difficulty of water is high, and meanwhile, the copper content testing method in the prior art is not accurate enough.
Disclosure of Invention
The invention aims to provide a method for testing the copper content of plastic particles of a dry copper rice machine, aiming at the defects in the prior art, and the method can be used for conveniently and accurately testing the copper content of the plastic particles.
In order to achieve the purpose, the invention provides a method for testing the copper content of plastic particles of a dry copper mill, which comprises the following steps:
s1, sampling, and taking plastic particles with the mass S from the packaging bag filled with the plastic particles as a test sample;
s2, separating, wherein the separating step comprises the following steps:
s2.1, mixing a test sample and a separation solution in a first container;
s2.2, pouring out the solid-liquid mixture in the first container, and leaving the cup bottom mixture in the first container.
And S3, weighing, and weighing the mixture at the bottom of the cup.
And S4, calculating the copper content.
In addition, the invention also provides the following auxiliary technical scheme:
preferably, in the step S1, the surface layer of the packaging bag is directly sampled during sampling, and plastic particles of the total mass S are randomly taken as test samples at a plurality of different positions on the surface layer of the same packaging bag.
Preferably, the test sample and the separation liquid are mixed in the first container, and then stirred using a stirring rod.
Preferably, in step S2.2, the bottom layer of the cup bottom mixture is prevented from being poured off by controlling the pouring speed during pouring.
Preferably, the step S2 further includes:
s2.3, continuously adding the separation liquid into the first container to mix the separation liquid with the cup bottom mixture;
s2.4, repeating steps S2.2 and S2.3 several times.
Preferably, the separation liquid added in step S2.3 is obtained by filtering off solids from the solid-liquid mixture poured off in step S2.2.
Preferably, the step S2.3 is to pour the solid-liquid mixture into a second container provided with a filter screen while pouring.
Preferably, the separation liquid is a mixed liquid of water and glycerol, and the volume ratio of the glycerol to the water is (4-9): 1.
preferably, the step S3 includes the following steps:
s3.1, drying the cup bottom mixture;
s3.2, removing non-copper impurities in the cup bottom mixture;
and S3.3, weighing the mass of the cup bottom mixture.
Preferably, in step S4, the calculation formula of the copper content of the nth test sample is as follows:
wherein, Pn-the copper content of the nth test sample;
m is the total mass of the mixture of the sealing bag and the cup bottom;
m-mass of the sealed bag;
s-quality of test sample.
The calculation formula of the average copper content of n test samples is as follows:
wherein, P is the copper content of plastic particles produced by a copper rice machine;
P1-the copper content of the first sample;
P2-the copper content of the second sample;
Pn-copper content of the nth sample.
Compared with the prior art, the invention has the advantages that: the method for testing the copper content of the plastic particles of the dry type copper rice machine can effectively separate the copper rice from the plastic particles and accurately measure the copper rice, so that the copper content of the plastic particles prepared by the dry type copper rice machine can be conveniently and accurately measured; in addition, the density of the separation liquid adopted in the invention is higher than that of water, so that plastic particles and copper rice particles can be better separated, and the detection accuracy is improved.
Detailed Description
The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments.
In a method for testing the copper content of plastic particles in a dry copper mill according to a preferred embodiment of the present invention, the following experimental instruments are used:
1. the container, in this example, two 1000ml beakers were used as containers for separating the plastic particles from the remaining copper grains.
2. The stirring rod is used for stirring, can accelerate plastic granules and copper rice reliable separation, and is preferred, and the stirring rod is the diameter 3mm, long 300 mm's glass rod.
3. And the filter screen is used for filtering the separation liquid, and is preferably a 1000-mesh stainless steel filter screen.
4. The water absorbent is used for absorbing water attached to the surface of the separated copper slag mixture, and paper or cloth with good water absorption, such as filter paper, can be used.
5. And the sealing bag is used for loading the copper slag.
6. And an electronic balance is used for weighing, and preferably, the division value of the electronic balance is 0.01 mg.
7. And the computer is used for recording data and processing the data.
8. And the tweezers are used for assisting in separating the non-copper substances in the filtered copper slag.
The raw materials used for testing in the invention are plastic particles, such as PVC particles, PE particles and the like, which are normally produced and prepared by a dry copper rice mill, and the plastic particles are packed and stood after production is finished without electrostatic separation, centrifugation and other treatments.
In the present invention, the separating liquid is used to separate the plastic particles from the copper rice, and the density of the separating liquid is preferably greater than or equal to the density of the plastic particles to be detected, but this is not essential, and the density of the separating liquid may be slightly less than the density of the plastic particles, so long as the plastic particles can float in the mixed liquid after stirring to facilitate separation from the copper rice.
The separation liquid can be a mixed liquid of water and an organic solution which is soluble in water, and the density of the organic solution needs to be higher than that of the water so as to improve the density of the separation liquid and enable the plastic particles to be separated more easily. In the embodiment, the organic solution is glycerol which is non-toxic and harmless, has no peculiar smell and is low in price, and the glycerol has the highest cost performance in comprehensive consideration, so that the solution is selected. The water in the separation liquid can be tap water directly, the normal temperature is about 25 ℃, and the content of chloride ions is between 0.3 and 0.5 mg/L; the density of the glycerol solution is 1.26g/cm3, and the temperature is about 25 ℃. The volume ratio of the glycerol to the water is (4-9): 1, preferably 9: 1.
The method for testing the copper content of the plastic particles of the dry copper mill comprises the following steps:
and S1, sampling, and taking plastic particles with a certain mass S from the packaging bag filled with the plastic particles as a test sample.
In step S1, in order to improve the detection accuracy and avoid the influence of human operation on the distribution of plastic particles and copper grains in the packaging bag, the plastic particles are directly sampled on the surface layer of the packaging bag during sampling, and plastic particles with a total mass S, preferably 100g, are randomly taken as test samples at different positions on the surface layer 3 of the same packaging bag, and the mass is weighed by an electronic balance.
It will be appreciated that the product in the bag is preferably prepared in the same batch, and that different batches of product may affect the accuracy of the measurement.
S2, separating, wherein the separating step comprises the following steps:
s2.1, mixing a test sample and a separation solution in a first container;
s2.2, pouring out the solid-liquid mixture in the first container, and leaving the cup bottom mixture in the first container.
In step S2.1, the prepared separation liquid may be added into the first container, and then the test sample may be placed therein; or the test sample can be put into the first container first, and then the prepared separation liquid is added. After the copper particles and the plastic particles are mixed, the mixture is stirred by a stirring rod to separate the copper particles from the plastic particles, and the plastic particles float on the upper layer of the liquid surface or are suspended in a separation liquid to form a solid-liquid mixture.
In the step S2.2, when pouring, the pouring speed needs to be noticed, so that the mixture at the bottom layer can be prevented from being poured; the solid-liquid mixture may be poured into a second container.
Step S2 may further include the steps of:
s2.3, continuously adding the separation liquid into the first container to mix the separation liquid with the cup bottom mixture;
s2.4, repeating steps S2.2 and S2.3 several times.
The separation liquid added in step S2.3 may be a fresh separation liquid, but in order to save raw materials, a separation liquid separated from a poured solid-liquid mixture may also be used: placing a filter screen at the opening of the second container, pouring the solid-liquid mixture in the first container into the second container, filtering out solids by using the filter screen, accommodating the filtered separated liquid in the second container, and adding the separated liquid in the second container into the first container. After the separation liquid and the bottom mixture were mixed, they were also stirred with a stirring bar to facilitate separation.
The more times the step S2.4 is repeated, the better the separation effect is, the more accurate the result is, the more preferably 10 times the plastic particles mixed in the cup bottom mixture can be separated.
S3, weighing, wherein the weighing comprises the following steps:
s3.1, drying the cup bottom mixture;
s3.2, removing non-copper impurities in the cup bottom mixture;
and S3.3, weighing the mass of the cup bottom mixture.
In step S3.1, the cup bottom mixture is transferred to a bibulous, which is used to dry the liquid adhering to the mixture.
In step S3.2, tweezers are manually used to remove non-copper impurities in the mixture, the finally obtained copper slag is transferred to a sealing bag (the mass of the sealing bag is weighed in advance and recorded as M), and then the total mass M of the mixture of the sealing bag and the cup bottom is weighed in step S3.3.
And S4, calculating the copper content.
In general, in order to improve the accuracy of the result, it is impossible to determine the result by performing only one test, and therefore, it is necessary to perform a plurality of (n) tests and take the final average value as the final test result, so that step S4 includes the following steps:
s4.1, calculating the copper content of the nth test sample according to the following formula:
wherein, Pn-the copper content of the nth test sample;
m is the total mass of the mixture of the sealing bag and the cup bottom;
m-mass of the sealed bag;
s-quality of test sample.
S4.2, calculating the average copper content of a plurality of test samples according to the following calculation formula:
wherein, P is the copper content of plastic particles produced by a copper rice machine;
P1-the copper content of the first sample;
P2-the copper content of the second sample;
Pn-copper content of the nth sample.
The method for testing the copper content of the plastic particles of the dry type copper rice machine can effectively separate the copper rice from the plastic particles and accurately measure the copper rice, so that the copper content of the plastic particles prepared by the dry type copper rice machine can be conveniently and accurately measured; in addition, the density of the separation liquid adopted in the invention is higher than that of water, so that plastic particles and copper rice particles can be better separated, and the detection accuracy is improved.
It should be noted that the above-mentioned preferred embodiments are merely illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A method for testing the copper content of plastic particles of a dry copper mill is characterized by comprising the following steps:
s1, sampling, and taking plastic particles with the mass S in a packaging bag filled with the plastic particles as a test sample;
s2, separating, wherein the separating step comprises the following steps:
s2.1, mixing a test sample and a separation solution in a first container;
s2.2, pouring out the solid-liquid mixture in the first container, and leaving the cup bottom mixture in the first container.
And S3, weighing, and weighing the mixture at the bottom of the cup.
And S4, calculating the copper content.
2. The method for testing the copper content of the plastic particles in the dry copper rice mill according to claim 1, wherein the method comprises the following steps: in the step S1, the surface layer of the packaging bag is directly sampled during sampling, and plastic particles of the total mass S are randomly selected as test samples at different positions on the surface layer of the same packaging bag.
3. The method for testing the copper content of the plastic particles in the dry copper rice mill according to claim 1, wherein the method comprises the following steps: after the test sample and the separation liquid were mixed in the first container, stirring was performed using a stirring rod.
4. The method for testing the copper content of the plastic particles in the dry copper rice mill according to claim 1, wherein the method comprises the following steps: in step S2.2, the pouring speed is controlled to prevent the bottom layer of the cup bottom mixture from being poured.
5. The method for testing the copper content of plastic particles in a dry copper rice mill according to any one of claims 1 to 4, wherein the method comprises the following steps: the step S2 further includes:
s2.3, continuously adding the separation liquid into the first container to mix the separation liquid with the cup bottom mixture;
s2.4, repeating steps S2.2 and S2.3 several times.
6. The method for testing the copper content of the plastic particles in the dry copper rice mill according to claim 5, wherein the method comprises the following steps: and the separation liquid added in the step S2.3 is obtained by filtering solid from the solid-liquid mixture poured out in the step S2.2.
7. The method for testing the copper content of the plastic particles in the dry copper rice mill according to claim 6, wherein the method comprises the following steps: and S2.3, pouring the solid-liquid mixture into a second container with a filter screen when pouring.
8. The method for testing the copper content of plastic particles in a dry copper rice mill according to any one of claims 1 to 4, wherein the method comprises the following steps: the separation liquid is a mixed liquid of water and glycerol, and the volume ratio of the glycerol to the water is (4-9): 1.
9. the method for testing the copper content of plastic particles in a dry copper rice mill according to any one of claims 1 to 4, wherein the method comprises the following steps: the step S3 includes the following steps:
s3.1, drying the cup bottom mixture;
s3.2, removing non-copper impurities in the cup bottom mixture;
and S3.3, weighing the mass of the cup bottom mixture.
10. The method for testing the copper content of plastic particles in a dry copper rice mill according to any one of claims 1 to 4, wherein the method comprises the following steps: in step S4, the calculation formula of the copper content of the nth test sample is as follows:
wherein, Pn-the copper content of the nth test sample;
m is the total mass of the mixture of the sealing bag and the cup bottom;
m-mass of the sealed bag;
s-quality of test sample.
The calculation formula of the average copper content of n test samples is as follows:
wherein, P is the copper content of plastic particles produced by a copper rice machine;
P1-the copper content of the first sample;
P2-the copper content of the second sample;
Pn-copper content of the nth sample.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010631518.0A CN111735732A (en) | 2020-07-03 | 2020-07-03 | Method for testing copper content of plastic particles of dry copper rice mill |
| PCT/CN2021/082672 WO2022001227A1 (en) | 2020-07-03 | 2021-03-24 | Test method for copper content of plastic particles from dry-type copper wire granulator |
| ZA2022/02926A ZA202202926B (en) | 2020-07-03 | 2022-03-10 | Method for testing copper content of plastic granules produced by dry-type scrap copper wire granulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010631518.0A CN111735732A (en) | 2020-07-03 | 2020-07-03 | Method for testing copper content of plastic particles of dry copper rice mill |
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| CN111735732A true CN111735732A (en) | 2020-10-02 |
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| CN202010631518.0A Pending CN111735732A (en) | 2020-07-03 | 2020-07-03 | Method for testing copper content of plastic particles of dry copper rice mill |
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| CN (1) | CN111735732A (en) |
| WO (1) | WO2022001227A1 (en) |
| ZA (1) | ZA202202926B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022001227A1 (en) * | 2020-07-03 | 2022-01-06 | 江苏亨通精工金属材料有限公司 | Test method for copper content of plastic particles from dry-type copper wire granulator |
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Also Published As
| Publication number | Publication date |
|---|---|
| ZA202202926B (en) | 2022-05-25 |
| WO2022001227A1 (en) | 2022-01-06 |
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