CN103063468A - Sampling method for power with particle diameter smaller than 50 micrometers - Google Patents
Sampling method for power with particle diameter smaller than 50 micrometers Download PDFInfo
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- CN103063468A CN103063468A CN2012105666876A CN201210566687A CN103063468A CN 103063468 A CN103063468 A CN 103063468A CN 2012105666876 A CN2012105666876 A CN 2012105666876A CN 201210566687 A CN201210566687 A CN 201210566687A CN 103063468 A CN103063468 A CN 103063468A
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Abstract
Provided is a sampling method for power with a particle diameter smaller than 50 micrometers. A decided sampling point comprises a first series of sampling points and a second series of sampling points, and the first series of the sampling points and the second series of the sampling points are intersected in a cross shape. The first series of the sampling points include that a connecting line between an arbitrary point A at an opening of a storage container and a point B at the bottom of the storage container is a diagonal line, and the point A, the point B, a point of a quarter of the connecting line, a point of a half of the connecting line, and a point of three quarters of the connecting line of the point A and the point B are served as material taking points. The second series of the sampling points include that a connecting line between an arbitrary point C at the opening of the storage container and a point D at the bottom of the storage container is a diagonal line, and the point C, the point D, a point of a quarter of the connecting line and a point of three quarters of the connecting line of the point C and the point D are served as material taking points. After the material taking points are ensured, a sampling spoon is used for sampling in sequence. The sampling points are distributed scientifically, a test sample obtained from each point is representative, and the defects that construction is difficult and potential safety hazard exists in the prior art are overcome.
Description
Technical field
The present invention relates to a kind of superfine powder sampling method, particularly a kind of when implementing sampling, adopt the sampling method of sample spoon sampling.
Background technology
The research of superfine powder is a great problem for how obtaining representative sample.
In actual mechanical process, the material that chemically examine is a large amount of, and it is more even that its composition has, and what have is very inhomogeneous.The analytical sample that takes by weighing during chemical examination is several grams, and therefore hundreds of milligram or still less, and analysis result must be able to represent the average composition of whole materials, careful and correct takes representative " average sample ", just is extremely important.In general, sampling error is often greater than analytical error, if it is incorrect therefore to sample, analysis result is just meaningless, even brings very bad consequence for the production scientific research.
The superfine powder sample inhomogeneous to grain size, choosing representative even sample is a comparatively complicated operation.Representative for the sample of taking, must from each different parts of material, take out the particle that some varies in size by certain program, the mark of taking-up is more, and the composition of sample and the average composition of analyzed material are more approaching.But the human and material resources that spend on sample pretreating after considering etc. should be to select the sampling quantity of saving most that can reach the expection accuracy as principle.
At present, the sampling method of superfine powder has multiple, and sampling instrument is take tube sampler as main, and the method for sampling is: 45 ℃ of angles in the bucket, symmetria bilateralis sampling.Also have proportional sampling device, screw reamer sampler, automatic continuous sampling device, cement sampler,, closed type sampler etc. is multiple, but because of the poor fluidity of superfine powder, these several sampling thiefs are low to the applicability of superfine powder.And superfine powder mostly is inflammable and explosive powder, poor stability.So at present in process of production, the modes that adopt the artificial sampling of whipping more, because inventory is large, the setting of sampling spot is regulation not, so it is very difficult to obtain representative sample.Therefore determine a kind of easy, wield sampling instrument of safety, the method for determining a kind of multidraw is that the method for sampling in superfine powder production, particularly inflammable and explosive power production is imperative.
Summary of the invention
Random for overcoming the sampling spot that exists in the prior art, sample possesses representational deficiency, the present invention proposes a kind of particle diameter less than the sampling method of 50 micro-powders.
The present invention at first determines the sampling spot in each sampling unit when sampling.Described sampling spot comprises First Series sampling spot and second series sampling spot, and is decussation between First Series sampling spot and the second series sampling spot.Specifically:
Determine the First Series sampling spot:
Any point A is got at magazine mouth place, gets 1 B in magazine bottom, and to make the A point at described magazine mouth place and the line between the B point bottom the magazine be diagonal line.Respectively with A point, B point, and 1/4 point on the AB line, 1/2 and 3/4 are the feeding point.
Determine the second series sampling spot:
1 C is got at magazine mouth place, and the angle between the A point in this C point and the First Series sampling spot is 90 °; Get 1 D in the magazine bottom.Line between C point and the D point is diagonal line.Respectively with C point, D point, and on the CD line 1/4 and 3/4 is the feeding point.
After determining each sampling spot, take a sample successively with sample spoon.The sample of obtaining is carried out sample preparation, test according to a conventional method.
The invention provides a kind of sampling method of superfine powder, by adopting the sample spoon sampling method superfine powder is implemented sampling; Sampling spot is according to the determinate multitudes point sampling point sample of taking a sample, to obtain representative sample.The sampling technique that the method has overcome existing superfine powder lacks representativeness, performance difficulty, has the deficiency of potential safety hazard, guarantees the sample representation of superfine powder, easy to use and safety.
This method sampling instrument is the stainless steel sample spoon, and security performance is high, be a kind of directly, simple, safety, applicability superfine powder sampling instrument wide, simple to operate.In order to verify the sampling effect of sample spoon, the powder of white is contained in the bottom of container, the above covers the black coal ash, take the powder of bottom with sample spoon, the material of getting is the white superfine powder that covers a small amount of one deck coal ash, by repeatedly sampling experiment, proves that the method sample representation is good.
In order to verify effect of the present invention, powder is extracted sample carry out testing graininess.Same personnel repeatedly take a sample to same bucket material, carry out testing graininess, and test result sees Table 1.Different personnel carry out the single sampling to same bucket material, carry out testing graininess, and test result sees Table 2.
The particle size results of table 1 pair same bucket milling product five sub-samplings
| The sampling order | 1 | 2 | 3 | 4 | 5 | Mean value | Standard deviation |
| Granularity (μ m) | 7.023 | 6.996 | 6.894 | 7.017 | 6.951 | 6.976 | 0.054 |
Table 2: different personnel's sample test results
Can find out that from above-mentioned data same personnel or different personnel are basically identical for the result that the powder of same unit carries out repeatedly sampling and testing, this sampling method satisfies the analysis demand of research and production.
Adopt the method to take a sample, guarantee samples' representativeness, greatly reduced the number of times of tester's sampling and analysing, guarantee the accuracy of test, production and scientific research are extremely important.
Compared with prior art, the present invention has following effect:
1. the present invention has determined the concrete position of each sampling spot, and the sampling error of having avoided grab sample to bring has reached the purpose of obtaining representative sample.
2. sampling instrument is the stainless steel sample spoon, has eliminated the danger in the sampling process, stops the potential safety hazard that human factor is brought, and security performance is high.
3. this sampling method is direct, simple, applicability is wide, simple to operate.
Embodiment
Embodiment 1
Present embodiment is a kind of sampling method of 50 micro-powders.Described powder is contained in the tubbiness magazine, and one barrel of powder is a sampling unit.
During sampling, at first determine the sampling spot in each sampling unit.Described sampling spot comprises First Series sampling spot and second series sampling spot, and is decussation between First Series sampling spot and the second series sampling spot.Specifically,
Determine the First Series sampling spot:
Any point A is got at magazine mouth place, gets 1 B in magazine bottom, and to make the A point at described magazine mouth place and the line between the B point bottom the magazine be diagonal line.Respectively with A point, B point, and 1/4 point on the AB line, 1/2 and 3/4 are the feeding point.
Determine the second series sampling spot:
1 C is got at magazine mouth place, and the angle between the A point in this C point and the First Series sampling spot is 90 °; Get 1 D in the magazine bottom.Line between C point and the D point is diagonal line.Respectively with C point, D point, and on the CD line 1/4 and 3/4 is the feeding point.
After determining each sampling spot, take a sample successively with the stainless steel sample spoon.The sample of obtaining is carried out sample preparation, test according to a conventional method.
Embodiment 2
Present embodiment is a kind of sampling method of 20 micro-powders.Described powder is contained in the bag-shaped magazine, and one bag of powder is a sampling unit.
During sampling, at first determine the sampling spot in each sampling unit.Described sampling spot comprises First Series sampling spot and second series sampling spot, and is decussation between First Series sampling spot and the second series sampling spot.Specifically,
Determine the First Series sampling spot:
Any point A is got at magazine mouth place, gets 1 B in magazine bottom, and to make the A point at described magazine mouth place and the line between the B point bottom the magazine be diagonal line.Respectively with A point, B point, and 1/4 point on the AB line, 1/2 and 3/4 are the feeding point.
Determine the second series sampling spot:
1 C is got at magazine mouth place, and the angle between the A point in this C point and the First Series sampling spot is 90 °; Get 1 D in the magazine bottom.Line between C point and the D point is diagonal line.Respectively with C point, D point, and on the CD line 1/4 and 3/4 is the feeding point.
After determining each sampling spot, take a sample successively with the stainless steel sample spoon.The sample of obtaining is carried out sample preparation, test according to a conventional method.
Claims (3)
1. a particle diameter is characterized in that less than the sampling method of 50 micro-powders,
During sampling, at first determine the sampling spot in each sampling unit; Described sampling spot comprises First Series sampling spot and second series sampling spot, and is decussation between First Series sampling spot and the second series sampling spot; After determining each sampling spot, take a sample successively with the stainless steel sample spoon.
As claimed in claim 1 a kind of particle diameter less than the sampling method of 50 micro-powders, it is characterized in that, described First Series sampling spot is to get any point A at magazine mouth place, get 1 B in magazine bottom, and to make the A point at described magazine mouth place and the line between the B point bottom the magazine be diagonal line; Respectively with A point, B point, and 1/4 point on the AB line, 1/2 and 3/4 are the feeding point.
3. a kind of particle diameter is characterized in that less than the sampling method of 50 micro-powders as claimed in claim 1, and described second series sampling spot is to get 1 C at magazine mouth place, and the angle between the A point in this C point and the First Series sampling spot is 90 °; Get 1 D in the magazine bottom; Line between C point and the D point is diagonal line; Respectively with C point, D point, and on the CD line 1/4 and 3/4 is the feeding point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105666876A CN103063468A (en) | 2012-12-24 | 2012-12-24 | Sampling method for power with particle diameter smaller than 50 micrometers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105666876A CN103063468A (en) | 2012-12-24 | 2012-12-24 | Sampling method for power with particle diameter smaller than 50 micrometers |
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| CN103063468A true CN103063468A (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105666876A Pending CN103063468A (en) | 2012-12-24 | 2012-12-24 | Sampling method for power with particle diameter smaller than 50 micrometers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167336A (en) * | 2017-05-03 | 2017-09-15 | 国网山东省电力公司电力科学研究院 | A kind of sampling method of desulfurization lime stone |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5149506A (en) * | 1991-08-09 | 1992-09-22 | Sage Products, Inc. | Stool collection and transport device |
| CN2563565Y (en) * | 2002-05-16 | 2003-07-30 | 李福其 | Scoop type sampler |
| CN201083623Y (en) * | 2007-10-17 | 2008-07-09 | 山东梁邹矿业集团有限公司 | Automatic sampler |
| CN201421401Y (en) * | 2009-06-24 | 2010-03-10 | 鞍钢集团矿业公司 | Sampler with telescopic rod |
| KR20120103172A (en) * | 2011-03-10 | 2012-09-19 | 한국도로공사 | Apparatus and method for gathering concrete powder |
| CN202471450U (en) * | 2012-03-05 | 2012-10-03 | 宁波双伟制药有限公司 | Sampling tool for raw and auxiliary materials of drugs |
-
2012
- 2012-12-24 CN CN2012105666876A patent/CN103063468A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5149506A (en) * | 1991-08-09 | 1992-09-22 | Sage Products, Inc. | Stool collection and transport device |
| CN2563565Y (en) * | 2002-05-16 | 2003-07-30 | 李福其 | Scoop type sampler |
| CN201083623Y (en) * | 2007-10-17 | 2008-07-09 | 山东梁邹矿业集团有限公司 | Automatic sampler |
| CN201421401Y (en) * | 2009-06-24 | 2010-03-10 | 鞍钢集团矿业公司 | Sampler with telescopic rod |
| KR20120103172A (en) * | 2011-03-10 | 2012-09-19 | 한국도로공사 | Apparatus and method for gathering concrete powder |
| CN202471450U (en) * | 2012-03-05 | 2012-10-03 | 宁波双伟制药有限公司 | Sampling tool for raw and auxiliary materials of drugs |
Non-Patent Citations (2)
| Title |
|---|
| 刘文锋 等: "掺混肥料取样方法的浅析", 《化肥工业》 * |
| 韩凤麟 等: "《中国材料工程大典－第14卷－粉末冶金材料工程》", 31 January 2006, 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167336A (en) * | 2017-05-03 | 2017-09-15 | 国网山东省电力公司电力科学研究院 | A kind of sampling method of desulfurization lime stone |
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Application publication date: 20130424 |