CN102590252A - Device for rapidly detecting iron content of iron ore by utilizing D-D neutron generator - Google Patents
Device for rapidly detecting iron content of iron ore by utilizing D-D neutron generator Download PDFInfo
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- CN102590252A CN102590252A CN201210044408XA CN201210044408A CN102590252A CN 102590252 A CN102590252 A CN 102590252A CN 201210044408X A CN201210044408X A CN 201210044408XA CN 201210044408 A CN201210044408 A CN 201210044408A CN 102590252 A CN102590252 A CN 102590252A
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Abstract
The invention relates to a device for rapidly detecting iron content of iron ore by utilizing a D-D neutron generator; a D-D neutron generator (3), a neutron moderation body (4), an iron ore sample box (5) and a BGO (Bismuth Germanium Oxide) detector (6) are all cylindrical and are sequentially arranged in a space which is encircled by a neutron shield a (1) and a neutron shield b (2), wherein the axes of the D-D neutron generator (3), the neutron moderation body (4), the iron ore sample box (5) and the BGO detector (6) are coincided; and the neutron shield a (1), the neutron shield b (2), the neutron moderation body (4) and the iron ore sample box (5) are all made of polyethylene material which can reduce the effect to an iron element property gamma energy spectrum, the neutron moderation body (4) with the radius being 10cm and the height being 4.8cm can increase the moderating efficiency, the iron ore sample box (5) with the radius being 10cm and the height being 5.2cm can increase the amount of iron element property gamma rays entering the BGO detector and increase the measurement accuracy of the iron content, therefore, the measuring result of the device can meet the requirement of practical application.
Description
Affiliated technical field
The present invention relates to a kind of is neutron source with the D-D neutron generator, and the device of express-analysis iron ore iron content belongs to the Application of Nuclear Technology field.
Background technology
With neutron express-analysis iron ore iron content is one of Application of Nuclear Technology hot research fields, and its principle is: with neutron irradiation iron ore sample, and the atomic nucleus generation radiation capture reaction of thermal neutron and iron, and discharge and send out the characteristic gamma ray wink.Measure the characteristic gamma ray tale of ferro element with gamma-ray detector, utilize iron content and the relation that its characteristic gamma ray tale is directly proportional again, calculate iron content.At present, alternative neutron source has isotope neutron source, D-T neutron generator and D-D neutron generator.
Isotope neutron source discharges neutron all the time, and the defective that can't overcome is arranged: yield constantly reduces, and routine analyzer needs constantly adjustment; When installation and replacing neutron source neutron irradiation is arranged, bigger to the harm of human body.
The neutron energy that the D-T neutron generator produces is 14MeV; The threshold value that is higher than the inelastic scattering reaction of most elements; The gamma ray power spectrum that obtains is the mixed spectrum of inelastic scattering and radiative capture, and wherein inelastic scattering gamma ray sum is considerably beyond radiative capture gamma ray sum.So, be difficult to obtain the characteristic gamma ray sum of ferro element, it is big to calculate the iron content time error, does not reach industrial application requirements.
The average energy of the neutron that the D-D neutron generator produces is 2.5MeV; Be lower than the threshold value of the inelastic scattering reaction of most elements; The gamma ray power spectrum that obtains nearly all is that radiative capture produces; Become more readily available the characteristic gamma ray sum of ferro element, be fit to calculate iron content, but there are two shortcomings in the D-D neutron generator:
1, yield is lower, when analyzing iron content, need improve the thermal neutron flux of iron ore region;
2, the average energy of neutron is 2.5MeV, needs just can be used for after the slowing down detection of iron content.
Summary of the invention
The purpose of this invention is to provide a kind of device with D-D neutron generator fast detecting iron ore iron content, technical matters to be solved is to improve the moderating efficiency of neutron and the thermal neutron flux of iron ore region.
In order to realize above-mentioned target, the technical solution adopted for the present invention to solve the technical problems is:
1. with the device of D-D neutron generator fast detecting iron ore iron content; D-D neutron generator, moderation of neutrons body, iron ore sales kit (SK) and BGO detector all are placed in the space that the NEUTRON PROTECTION body surrounds; It is characterized in that: D-D neutron generator, moderation of neutrons body, iron ore sales kit (SK) and BGO detector all are columniform; Place dead in line successively.
2. the radius of iron ore sales kit (SK) is 10cm, and height is 5.2cm, and material is a tygon.
3. the radius of moderation of neutrons body is 10cm, and height is 4.8cm, and material is a tygon.
The design reasons of technique scheme with the effect as follows:
1, the NEUTRON PROTECTION material is a tygon, and it both can protect neutron, and the radiation dose around making is up to state standards, and can also improve the thermal neutron flux of iron ore sales kit (SK) position through reflection and slowing down.
2, keeping under the constant situation of sample, when the radius of iron ore sales kit (SK) is 10cm, high when being 5.2cm, the ferro element characteristic gamma ray that the BGO detector obtains is maximum, and measuring accuracy is the highest.
3, the moderation of neutrons body is used for slowing down 2.5MeV neutron, and when its radius is 10cm, high when being 4.8cm, the ferro element characteristic gamma ray that the BGO detector obtains is maximum, and measuring accuracy is the highest.
4, NEUTRON PROTECTION body; The material of moderation of neutrons body and iron ore sales kit (SK) all is a tygon, and reason is that tygon only contains carbon, two kinds of elements of oxygen, and the threshold value of their inelastic scattering reaction is higher than 2.5MeV far away; Their capture cross-section is about 3mb and 0.1mb, and is very little.Because do not have the interference of the gamma ray of protection body material and neutron effect generation, the gamma spectra that the BGO detector obtains is very clear, can improve the measuring accuracy of ferro element significantly.
The invention has the beneficial effects as follows,, can improve the thermal neutron flux in the iron ore sales kit (SK) effectively, improve the measuring accuracy of iron content, reach requirement of actual application through the reflection of protection body and the slowing down of slow body.
Description of drawings
Below in conjunction with accompanying drawing and embodiment, further the present invention will be described.
Accompanying drawing 1 is a block diagram of the present invention.
Among Fig. 1,1. NEUTRON PROTECTION body a, 2. NEUTRON PROTECTION body b, 3.D-D neutron generator, 4. moderation of neutrons body, 5. iron ore sales kit (SK), 6.BGO detector.
Embodiment
In Fig. 1, putting into through moving NEUTRON PROTECTION body b (2) of iron ore sales kit (SK) (5) realizes.The material of moderation of neutrons body (4) is a tygon; The part neutron of D-D neutron generator (3) emission gets into moderation of neutrons body (4) back by slowing down; Get into the thermal neutron of iron ore sales kit (SK) (5) and the element generation nuclear reaction in the iron ore, and discharge the characteristic gamma ray.The gamma spectra that utilizes BGO detector (6) to measure calculates the characteristic gamma tale of ferro element, and then calculates the content of ferro element.Get into other regional neutron by NEUTRON PROTECTION body a (1) NEUTRON PROTECTION body b (2) slowing down, absorption.
Claims (3)
1. with the device of D-D neutron generator fast detecting iron ore iron content; D-D neutron generator (3), moderation of neutrons body (4), sales kit (SK) (5), BGO detector (6) all are placed in the space that NEUTRON PROTECTION body a (1) and NEUTRON PROTECTION body b (2) surround; It is characterized in that: D-D neutron generator (3), moderation of neutrons body (4), sales kit (SK) (5), BGO detector (6) all are columniform; Place dead in line successively.
2. the device with D-D neutron generator fast detecting iron ore iron content according to claim 1, it is characterized in that: the radius of sales kit (SK) (5) is 10cm, and height is 5.2cm, and material is a tygon.
3. the device with D-D neutron generator fast detecting iron ore iron content according to claim 1, it is characterized in that: the radius of moderation of neutrons body (4) is 10cm, and height is 4.8cm, and material is a tygon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210044408XA CN102590252A (en) | 2012-02-27 | 2012-02-27 | Device for rapidly detecting iron content of iron ore by utilizing D-D neutron generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210044408XA CN102590252A (en) | 2012-02-27 | 2012-02-27 | Device for rapidly detecting iron content of iron ore by utilizing D-D neutron generator |
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| CN102590252A true CN102590252A (en) | 2012-07-18 |
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| CN201210044408XA Pending CN102590252A (en) | 2012-02-27 | 2012-02-27 | Device for rapidly detecting iron content of iron ore by utilizing D-D neutron generator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390438A (en) * | 2013-07-23 | 2013-11-13 | 中国核动力研究设计院 | Boron concentration monitoring device |
| CN109100372A (en) * | 2018-07-04 | 2018-12-28 | 安徽库硕矿产品销售有限公司 | Portable composition of ores detection device |
| CN109690300A (en) * | 2016-06-09 | 2019-04-26 | 凤凰有限责任公司 | System and method for carrying out the active scan of nuclear fuel rod |
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| CN86204889U (en) * | 1986-07-04 | 1987-06-24 | 中国原子能科学研究院 | High-energy r ray source device for calibration |
| CN100595575C (en) * | 2007-11-19 | 2010-03-24 | 南京国晟科技有限公司 | Diffuse transmission type composition of ores real time on-line testing apparatus |
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Patent Citations (2)
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| CN86204889U (en) * | 1986-07-04 | 1987-06-24 | 中国原子能科学研究院 | High-energy r ray source device for calibration |
| CN100595575C (en) * | 2007-11-19 | 2010-03-24 | 南京国晟科技有限公司 | Diffuse transmission type composition of ores real time on-line testing apparatus |
Non-Patent Citations (6)
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| 《同位素》 20050531 程道文等 利用中子感生瞬发gamma射线分析水泥生料中的元素含量 84-86 1-3 第18卷, 第1-2期 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390438A (en) * | 2013-07-23 | 2013-11-13 | 中国核动力研究设计院 | Boron concentration monitoring device |
| CN103390438B (en) * | 2013-07-23 | 2016-01-20 | 中国核动力研究设计院 | boron concentration monitoring device |
| CN109690300A (en) * | 2016-06-09 | 2019-04-26 | 凤凰有限责任公司 | System and method for carrying out the active scan of nuclear fuel rod |
| CN109100372A (en) * | 2018-07-04 | 2018-12-28 | 安徽库硕矿产品销售有限公司 | Portable composition of ores detection device |
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Application publication date: 20120718 |