Sample taking and preparing method for bagged metal powder

Abstract

The invention discloses a bagged metal powder sampling and preparing method which comprises the following steps: step 1, when small bags are sleeved in ton-bag packages, drawing and sampling to extract 9 small-bag packaged metal powder, step 2, when no small bag exists in the ton-bag packages, drawing and sampling three bags, and taking in an empty bag, step 3, splitting by using a coning quartering method, and when the total weight of two components is more than 2kg, taking out the small-bag packaged metal powder, taking out the small-bag packaged metal powder, and taking out the small-bag packaged metal powder. According to the method, the problems that bagged metal powder is scattered and wasted during sampling, dust pollutes a working site and the working site is serious and difficult are solved, the sample representativeness is good, the detection result is objective and real, the method is economical and efficient, operation is easy and convenient, operability is high, and the method is suitable for large-scale popularization and application. The method can be completed under the existing conditions, the sampling and preparation problem of the bagged metal powder is solved, and meanwhile sampling and preparation of mixed materials such as mixtures with different particle size grades and different physical properties of the metal powder can be expanded.

Description

Technical Field

[0001] The invention relates to the technical field of sample preparation, and in particular to a method for sampling bagged metal powder. Background Art

[0002] Metal powder refers to a group of metal particles with a size of less than 1mm. It includes single metal powder, alloy powder and certain refractory compound powders with metallic properties, and is the main raw material for powder metallurgy. For the quality inspection of this type of raw material, chemical and physical properties are generally required. Chemical properties refer to the metal content and impurity content. Physical properties include the average particle size and particle size distribution of the powder. Iron and steel metallurgy purchases coarse powder, which is divided into five grades: coarse powder, medium powder, fine powder, micro-fine powder and ultra-fine powder. The factory delivery is packed in ton bags, etc. For the quality inspection of this type of material, there is currently no research literature or standards on the sampling method of bagged metal powder.

[0003] The focus of raw material testing in metallurgical factories is the content of major metal elements and the content of impurity elements that affect the performance of metallurgical products or the content of components specified in the raw material production process. Metal powder is a loose substance, finely broken, and has very good fluidity. Conventional alloy bag sampling operations produce a lot of dust. Cut bag / drill rod sampling results in scattering, waste, and serious dust pollution on the operation site, which brings certain difficulties to the sampling work. Summary of the invention

[0004] The purpose of the present invention is to provide a method for sampling bagged metal powder to solve the technical problems in the prior art that the alloy bag sampling operation is very dusty, the sampling is carried out by cutting the bag / drill rod, and there is scattering and waste, and the dust pollutes the operation site seriously, which brings certain difficulties to the sampling work.

[0005] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0006] A method for sampling bagged metal powder, comprising:

[0007] Step 1: When a ton bag is packaged in a small bag, firstly select 9 bags of metal powder packaged in small bags by lottery, then randomly select 3 bags from the 9 bags, extract the upper material in the bags, then randomly select 3 bags from the 9 bags, extract the middle material in the bags, and only take the bottom material from the remaining 3 bags. Take 3 bags of upper material, middle material and bottom material respectively, for a total of 27 bags. The total sampling weight is greater than 15kg, and a small amount of cleaning sample is taken.

[0008] Step 2: When there are no small bags in the ton bag packaging, randomly select 3 bags for sampling and empty the bags for sampling.

[0009] Step 3: During the sampling process of the sample bags, take 3 samples from each bag, pour out 1 / 3, 1 / 2 and 2 / 3 of the material in the bag respectively and put them into the sampling device. Draw samples from the material through the sampling device. The weight of each sample is ≥1Kg, the number of samples is ≥9, the total weight of the samples is greater than 15kg, and a small amount of washing samples is taken.

[0010] Step 4: Use the cone quartering method to reduce the amount. When the total amount meets the total weight of the two components (about 2kg), divide it into 2 parts, one for measuring the particle size and the other for preparing the component samples. Divide about 1kg of the sample into 3 parts, one through the grinding machine until it passes through a 120-mesh sieve and is used for testing, and the other two are kept as samples for future reference.

[0011] Step 5: Perform particle size test on the sample, accurately weigh the total sample weight for the particle size test, select a round hole sieve that meets the technical specifications for screening, weigh the material on the sieve after the operation is completed, and calculate the upper limit particle size result = weight of material on the sieve / total sample weight for the particle size test*100%.

[0012] A bagged metal powder sampling device, comprising:

[0013] A circular tank body 1, a filter frame arranged horizontally is fixedly connected to the inner wall of the circular tank body 1, a filter is fixedly installed on the filter frame, a spring plate is fixedly connected to the lower end of the filter frame, and a vibration motor is fixedly connected to the spring plate;

[0014] A circular tank body is provided with a discharge tank body at a lower end of the circular tank body, the circular tank body is provided below the discharge tank body, a motor mounting plate is fixedly connected to the inner wall of the circular tank body, a driving motor is fixedly connected to the motor mounting plate, a fan is provided on the driving end of the driving motor, an on-off valve is fixedly installed on the circular tank body, the on-off valve is provided below the fan, a sampling tube is provided on the side end face of the circular tank body, a collecting bag is provided at the opening of the sampling tube, a tank opening is opened at the lower end of the circular tank body, and a collecting tank is provided at the tank opening at the lower end of the circular tank body.

[0015] As a further solution of the present invention: the upper end of the material discharge tank body is connected with the circular tank body 1, the lower end of the material discharge tank body is connected with the circular tank body 2, and the overall structure of the material discharge tank body is a truncated cone type.

[0016] As a further solution of the present invention: a sampling fan is fixedly connected to the sampling tube, a connecting plate is evenly distributed in an annular shape and fixedly connected at the mouth of the sampling tube, a bag mouth hoop is fixedly connected to the bag mouth of the collecting bag, and hoop mounting plates corresponding to the connecting plates are evenly distributed in an annular shape around the bag mouth hoop.

[0017] As a further solution of the present invention: a threaded connection hole is formed through the connecting plate, a connecting through hole is formed on the hoop mounting plate, a screw is connected between the connecting plate and the hoop mounting plate, the screw passes through the connecting through hole on the hoop mounting plate and is threadedly connected with the threaded connection hole on the connecting plate.

[0018] As a further solution of the present invention: a collecting feed port is opened at the upper end of the collecting tank, a connecting plate 2 is evenly distributed in an annular shape and fixedly connected at the opening of the lower end of the circular tank body, and a tank mounting plate corresponding to the connecting plate 2 is evenly distributed in an annular shape and fixedly connected at the collecting feed port of the collecting tank.

[0019] As a further solution of the present invention: a second threaded connection hole is formed through the second connection plate, a second connection through hole is formed through the second tank body mounting plate, a second screw is connected between the second connection plate and the tank body mounting plate, and the second screw passes through the second connection through hole on the tank body mounting plate and is threadedly connected to the second threaded connection hole on the second connection plate.

[0020] As a further solution of the present invention: the driving end of the driving motor is coaxially fixedly connected with a rotating shaft, the rotating shaft is coaxially fixedly connected with the fan, and the outer cover of the driving motor is provided with a dust cover, which is fixedly connected to the motor mounting plate.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention solves the problem of scattering and waste of bagged metal powder sampling, and the serious difficulty of dust pollution at the operation site. The sample is representative, the test results are objective and true, the method is economical and efficient, the operation is simple and easy, the operability is strong, and it can be completed under the existing conditions. It solves the problem of sampling and preparing bagged metal powder, and can also expand the sampling and preparing of mixed materials such as metal powders of different particle sizes and mixtures of different physical properties;

[0023] 2. When the present invention takes belt sampling, the sampled raw materials are added into circular tank body one through the feeding port at the upper end of circular tank body one, the sampled raw materials fall onto the filter screen of the filter screen frame, the vibration motor is started to drive the spring plate to vibrate, and the vibration of the spring plate can drive the filter screen frame to vibrate, so that the sampled raw materials can be screened to remove the agglomerated raw materials, and at the same time, the driving motor is started to drive the fan to rotate and open the on-off valve to allow the sampled raw materials to enter circular tank body two in a dusty state, and then the sampling fan is intermittently opened to draw the sampled raw materials into a collecting bag, and the material collected in the collecting bag is used as a sampling sample, and the material is intercepted by the sampling device as a sample, which is conducive to further improving the representativeness of the sample and improving the authenticity of the sample detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1It is a flow chart of the sample preparation method of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 3 It is a schematic diagram of a partial structural cross-sectional view of the present invention;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the collecting tank of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the collecting bag of the present invention.

[0030] In the figure: 1. round tank body 1; 2. filter frame; 3. spring plate; 4. connecting convex plate; 5. vibration motor; 6. unloading tank body; 7. round tank body 2; 8. motor mounting plate; 9. driving motor; 10. dust cover; 11. fan; 12. on-off valve; 13. sampling tube; 14. sampling fan; 15. connecting plate 1; 16. connecting plate 2; 17. cover plate; 18. collecting tank; 19. collecting bag; 20. tank body mounting plate; 21. bag mouth hoop; 22. hoop mounting plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 5 As shown, a bagged metal powder sampling device comprises:

[0033] A circular tank body 1, a filter frame 2 arranged horizontally is fixedly connected to the inner wall of the circular tank body 1, a filter is fixedly installed on the filter frame 2, a spring plate 3 is fixedly connected to the lower end of the filter frame 2, and a vibration motor 5 is fixedly connected to the spring plate 3;

[0034] A circular tank body 27, a material discharge tank body 6 is arranged at the lower end of the circular tank body 1, the circular tank body 27 is arranged below the material discharge tank body 6, a motor mounting plate 8 is fixedly connected to the inner wall of the circular tank body 27, a driving motor 9 is fixedly connected to the motor mounting plate 8, a fan 11 is arranged on the driving end of the driving motor 9, an on-off valve 12 is fixedly installed on the circular tank body 27, the on-off valve 12 is arranged below the fan 11, a sampling tube 13 is arranged on the side end surface of the circular tank body 27, a collecting bag 19 is arranged at the opening of the sampling tube 13, a tank opening is opened at the lower end of the circular tank body 27, and a collecting tank 18 is arranged at the tank opening at the lower end of the circular tank body 27.

[0035] In some specific implementation schemes, the upper end of the unloading tank body 6 is connected to the circular tank body 1, and the lower end of the unloading tank body 6 is connected to the circular tank body 2 7, and the overall structure of the unloading tank body 6 is a truncated cone.

[0036] A sampling fan 14 is fixedly connected to the sampling tube 13, a connecting plate 15 is evenly distributed in an annular shape and fixedly connected at the tube mouth of the sampling tube 13, a bag mouth hoop 21 is fixedly connected to the bag mouth of the collecting bag 19, and hoop mounting plates 22 corresponding to the connecting plate 15 are evenly distributed in an annular shape around the bag mouth hoop 21, a threaded connection hole 1 is penetrated through the connecting plate 15, a connecting through hole 1 is opened on the hoop mounting plate 22, a screw rod 1 is connected between the connecting plate 15 and the hoop mounting plate 22, and the screw rod 1 penetrates the connecting through hole 1 on the hoop mounting plate 22 and is threadedly connected to the threaded connection hole 1 on the connecting plate 15.

[0037] A collecting feed port is provided at the upper end of the collecting tank 18, and a connecting plate 16 is evenly distributed in an annular shape and fixedly connected to the tank opening at the lower end of the circular tank body 27. A tank mounting plate 20 corresponding to the connecting plate 16 is evenly distributed in an annular shape and fixedly connected to the collecting feed port of the collecting tank 18. Two threaded connecting holes are provided through the connecting plate 16, and two connecting through holes are provided through the tank mounting plate 20. Two screws are connected between the connecting plate 16 and the tank mounting plate 20, and the two screws pass through the two connecting through holes on the tank mounting plate 20 and are threadedly connected to the two threaded connecting holes on the connecting plate 16.

[0038] In some specific embodiments, the driving end of the driving motor 9 is coaxially fixedly connected with a rotating shaft, the rotating shaft is coaxially fixedly connected with the fan 11, and the outer cover of the driving motor 9 is provided with a dust cover 10, which is fixedly connected to the motor mounting plate 8.

[0039] In some specific embodiments, a feed port is provided at the upper end of the circular tank body 1, and a cover plate 17 is provided at the feed port.

[0040] In some specific embodiments, connecting protrusions 4 are evenly distributed in an annular shape and fixedly connected to the inner wall of the circular tank body 1 , and the side ends of the filter frame 2 are fixedly connected to the connecting protrusions 4 .

[0041] A method for sampling bagged metal powder comprises the following steps:

[0042] Step 1: When a ton bag is packaged in a small bag, firstly select 9 bags of metal powder packaged in small bags by lottery, then randomly select 3 bags from the 9 bags, extract the upper material in the bags, then randomly select 3 bags from the 9 bags, extract the middle material in the bags, and only take the bottom material from the remaining 3 bags. Take 3 bags of upper material, middle material and bottom material respectively, for a total of 27 bags. The total sampling weight is greater than 15kg, and a small amount of cleaning sample is taken.

[0043] Step 2: When there are no small bags in the ton bag packaging, randomly select 3 bags for sampling and empty the bags for sampling.

[0044] Step 3: During the sampling process of the sample bags, take 3 samples from each bag, pour out 1 / 3, 1 / 2 and 2 / 3 of the material in the bag respectively and put them into the sampling device. Draw samples from the material through the sampling device. The weight of each sample is ≥1Kg, the number of samples is ≥9, the total weight of the samples is greater than 15kg, and a small amount of washing samples is taken.

[0045] Step 4: Use the cone quartering method to reduce the amount. When the total amount meets the total weight of the two components (about 2kg), divide it into 2 parts, one for measuring the particle size and the other for preparing the component samples. Divide about 1kg of the sample into 3 parts, one through the grinding machine until it passes through a 120-mesh sieve and is used for testing, and the other two are kept as samples for future reference.

[0046] Step 5: Perform particle size test on the sample, accurately weigh the total sample weight for the particle size test, select a round hole sieve that meets the technical specifications for screening, weigh the material on the sieve after the operation is completed, and calculate the upper limit particle size result = weight of material on the sieve / total sample weight for the particle size test*100%.

[0047] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

[0048] When taking samples from the belt in step three, the sampled raw materials are added into the circular tank body 1 through the feeding port at the upper end of the circular tank body 1, and the sampled raw materials fall onto the filter screen of the filter frame 2. The vibration motor 5 is started to drive the spring plate 3 to vibrate. The vibration of the spring plate 3 can drive the filter frame 2 to vibrate, so that the sampled raw materials can be screened to remove the agglomerated raw materials. At the same time, the drive motor 9 is started to drive the fan 11 to rotate and the on-off valve 12 is opened to allow the sampled raw materials to enter the circular tank body 7 in a dusty state. The sampling fan 14 is then intermittently opened to draw the sampled raw materials into the collecting bag 19, and the materials collected in the collecting bag 19 are used as sampling samples. The materials are intercepted as samples by the sampling device, which is conducive to further improving the representativeness of the samples and improving the authenticity of the sample detection results.

[0049] Several embodiments of the present invention are described in detail above, but the embodiments of the present invention are not limited thereto and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for sampling bagged metal powder, characterized in that: include: S1: When a ton bag is packed in a small bag, firstly, 9 bags of metal powder packaged in small bags are sampled by lot, and then 3 bags are randomly selected from the 9 bags to extract the upper material in the bags, and then 3 bags are randomly selected from the 9 bags to extract the middle material in the bags. For the remaining 3 bags, only the bottom material is taken. 3 bags are taken from the upper material, the middle material and the bottom material respectively, for a total of 27 bags. The total sampling weight is greater than 15kg, and a small amount of cleaning samples are taken; S2: When there are no small bags in the ton bag packaging, three bags are randomly sampled and the bags are vacated for sampling; S3: During the sampling process of the sample bag, 3 samples are taken from each bag, and 1 / 3, 1 / 2 and 2 / 3 of the material in the bag are poured out respectively and put into the sampling device. Samples are drawn from the material through the sampling device. The weight of each sample is ≥1Kg, the number of samples is ≥9, the total weight of the samples is greater than 15kg, and a small amount of washing samples is taken; S4: Use the cone quartering method to reduce the total amount. When the total amount meets the total weight of the two components (about 2kg), divide it into 2 parts, one for measuring the particle size and the other for preparing the component samples. Divide about 1kg of the sample into 3 parts, one part is passed through a sample grinder until it passes through a 120-mesh sieve and is used for testing, and the other two parts are kept as samples for future reference; S5: Perform particle size test on the sample, accurately weigh the total sample weight of the particle size test, select a round hole sieve that meets the technical specifications for screening, weigh the weight of the material on the sieve after the operation is completed, and calculate the upper limit particle size result = weight of the material on the sieve / total sample weight of the particle size test*100%.

2. A bagged metal powder sampling device, used to implement the bagged metal powder sampling method according to claim 1, characterized in that: include: A circular tank body (1), a horizontally arranged filter frame (2) is fixedly connected to the inner wall of the circular tank body (1), a filter is fixedly installed on the filter frame (2), a spring plate (3) is fixedly connected to the lower end of the filter frame (2), and a vibration motor (5) is fixedly connected to the spring plate (3); The circular tank body (7) comprises a second circular tank body, a material discharge tank body (6) is arranged at the lower end of the first circular tank body, the second circular tank body (7) is arranged below the material discharge tank body (6), a motor mounting plate (8) is fixedly connected to the inner wall of the second circular tank body (7), a driving motor (9) is fixedly connected to the motor mounting plate (8), a fan (11) is arranged on the driving end of the driving motor (9), an on-off valve (12) is fixedly installed on the second circular tank body (7), the on-off valve (12) is arranged below the fan (11), a sampling tube (13) is arranged on the side end surface of the second circular tank body (7), a collecting bag (19) is arranged at the opening of the sampling tube (13), a tank opening is opened at the lower end of the second circular tank body (7), and a collecting tank (18) is arranged at the tank opening at the lower end of the second circular tank body (7).

3. A bagged metal powder sampling device according to claim 2, characterized in that: The upper end of the material discharge tank body (6) is connected to the circular tank body 1 (1), and the lower end of the material discharge tank body (6) is connected to the circular tank body 2 (7). The overall structure of the material discharge tank body (6) is a truncated cone.

4. A bagged metal powder sampling device according to claim 2, characterized in that: A sampling fan (14) is fixedly connected to the sampling tube (13); a connecting plate (15) is evenly distributed in an annular shape and fixedly connected to the tube opening of the sampling tube (13); a bag opening hoop (21) is fixedly connected to the bag opening of the collecting bag (19); and hoop mounting plates (22) corresponding to the connecting plate (15) are evenly distributed in an annular shape around the bag opening hoop (21).

5. A bagged metal powder sampling device according to claim 4, characterized in that: A threaded connection hole is formed through the connection plate (15), a connection through hole is formed on the hoop mounting plate (22), a screw rod is connected between the connection plate (15) and the hoop mounting plate (22), and the screw rod passes through the connection through hole on the hoop mounting plate (22) and is threadedly connected to the threaded connection hole on the connection plate (15).

6. The bagged metal powder sampling device according to claim 2, characterized in that: A collecting feed inlet is provided at the upper end of the collecting tank (18); a connecting plate (16) is evenly distributed in an annular shape and fixedly connected to the opening of the lower end of the circular tank body (7); and a tank body mounting plate (20) corresponding to the connecting plate (16) is evenly distributed in an annular shape and fixedly connected to the collecting feed inlet of the collecting tank (18).

7. A bagged metal powder sampling device according to claim 6, characterized in that: The second connecting plate (16) is provided with a threaded connection hole, the tank body mounting plate (20) is provided with a connection through hole, the second connecting plate (16) and the tank body mounting plate (20) are connected with a screw rod, the screw rod passes through the connection through hole on the tank body mounting plate (20) and is threadedly connected with the second threaded connection hole on the second connecting plate (16).

8. The bagged metal powder sampling device according to claim 2, characterized in that: The driving end of the driving motor (9) is coaxially fixedly connected with a rotating shaft, the rotating shaft is coaxially fixedly connected with the fan (11), and the outer cover of the driving motor (9) is provided with a dust cover (10), and the dust cover (10) is fixedly connected to the motor mounting plate (8).

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