CN107290354A - A kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed and analysis method - Google Patents
A kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed and analysis method Download PDFInfo
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- CN107290354A CN107290354A CN201610193907.3A CN201610193907A CN107290354A CN 107290354 A CN107290354 A CN 107290354A CN 201610193907 A CN201610193907 A CN 201610193907A CN 107290354 A CN107290354 A CN 107290354A
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- 238000005245 sintering Methods 0.000 title claims abstract description 44
- 230000004913 activation Effects 0.000 title claims abstract description 15
- 238000004458 analytical method Methods 0.000 title claims abstract description 8
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 239000004698 Polyethylene Substances 0.000 claims abstract description 13
- -1 polyethylene Polymers 0.000 claims abstract description 13
- 229920000573 polyethylene Polymers 0.000 claims abstract description 13
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 6
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical group [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000008054 signal transmission Effects 0.000 claims abstract description 4
- 230000005251 gamma ray Effects 0.000 claims description 27
- 230000001681 protective effect Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- 230000005284 excitation Effects 0.000 claims description 9
- 238000001228 spectrum Methods 0.000 claims description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 230000005283 ground state Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 8
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000292 calcium oxide Substances 0.000 abstract description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000377 silicon dioxide Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 239000000571 coke Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000155 isotopic effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003947 neutron activation analysis Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/025—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material using neutrons
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
A kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed and analysis method：Its measurement apparatus is that a gamma detector is fixed between upper belt and lower belt, neutron source is placed in the top of upper belt and sintering feed, neutron is aimed downwardly on belt after sintering feed has an effect with the atomic nucleus in sintering feed, the ray received is converted into pulse signal transmission and gives the processing of Multi channel spectrum analysis device by gamma detector, effective information is uploaded to host computer by Multi channel spectrum analysis device, calculates the basicity value of sintering feed according to respective formula by host computer.Because finally calculating the ratio relation that obtained basicity value is calcium oxide content and dioxide-containing silica, do not influenceed by the total amount of sintering feed on belt；The bulk shielding protection of instrument uses two-layer structure, and internal layer is lead, and outer layer is polyethylene, reduces the usage amount to lead, reduces the cost and weight of instrument；Detector shield uses two-layer structure, and outer layer is polyethylene, and internal layer is cadmium plate, and the influence by neutron to gamma detector is minimized, and improves the analysis precision of instrument.
Description
Technical field
The present invention relates to a kind of online neutron activation analysis device and application method, a kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed and application method are in particulard relate to.
Background technology
Sintering feed is the primary raw material of blast furnace process, and the quality of its quality is directly connected to stable iron-making production, direct motion and the completion of other technical-economic indexes.Sintering feed not only wants grade high, and intensity is high, and granularmetric composition is reasonable, powder is few, and the basicity stabilization of sintering feed has considerable influence to blast furnace.It is also the basis for improving blast furnace economic and technical norms it is well known that improving the main contents that sintering feed quality is BF Burden Materials Preparation.The particularly raising of sinter basicity coefficient of stabilization, important influence is suffered to the Yield and quality for sintering and smelting iron, when domestic experience basicity coefficient of stabilization often improves 10%, coke ratio reduction by 1%, output increased 1.5%, it can be seen that the raising of sintering feed basicity coefficient of stabilization is smelted to reinforcing blast furnace, iron increasing and coke saving have great significance.
And the basicity value of sintering feed is determined at present, it is the artificial sampling from belt by the way of, then by method of the sample by chemical analysis, the content of wherein calcium oxide and silica is obtained, then the basicity value of sintering feed is obtained by calculating the ratio of calcium oxide content and dioxide-containing silica.
And the basicity value of sintering feed is obtained by chemical analysis methods and calculating by manual sampling to laboratory, there are the processes such as drying, grinding, screening in process, when final basicity value result comes out, it has been later thing of several hours, there is serious hysteresis quality in time, quality inspection afterwards can only be played a part of to production technology, the effect for instructing technique adjustment is not had.
There is presently no the instrument that on-line analysis basicity value can be directly carried out to sintering feed on belt.
The content of the invention
The defect existed for original technology, the present invention proposes a kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed and application method.
The concrete technical scheme taken of the present invention is：
Detector shield 13 is installed between the upper belt 2 at practical application scene and lower belt 1 by measurement bay 11, and shielding follower 5 is installed in the upper belt 2 at practical application scene and the top of sintering feed by measurement bay 11.Measurement bay 11 is fixed by the belt holder 10 at scene, and the outside of measurement bay 11 is provided with protective cover 12.The inside of detector shield 13 is equipped with gamma ray detector 6, and gamma ray detector 6 couples with Multi channel spectrum analysis device 8, and Multi channel spectrum analysis device 8 couples with host computer 9.
12 points of protective cover is two layers, and the material of protective cover internal layer 122 is lead, and the material of protective cover outer layer 121 is polyethylene.
13 points of detector shield is two layers, and the material of detector shield internal layer 132 is cadmium, and the material of detector shielding volume surrounding 131 is polyethylene.
Shield and neutron source 3 is housed in follower 5, shielding follower 5 carries out shielding protection to neutron source 3.Shielding follower 5 is provided with the wedge-shaped collimating aperture 4 that can be closed, and when collimating aperture is opened, neutron ray can only irradiate in certain scope, after bore closure is collimated, and entirety is radiationless to leak.When in use, wedge-shaped collimating aperture 4 is opened wide, the neutron that neutron source 3 is sent is aimed downwardly, it is radiated upper belt 2 and carries sintering feed thereon, neutron interacts with the atomic nucleus in sintering feed, atomic nucleus, from stable ground state transition to unstable excitation state, the Characteristic γ ray of different-energy can be discharged when different elements by neutron activation when being activated atomic nucleus from excitation state de excitation.
The gamma-rays received is converted into pulse signal transmission to Multi channel spectrum analysis device 8 by gamma ray detector 6, Multi channel spectrum analysis device 8 transmits the impulse amplitude come to gamma ray detector 6 and is identified, and transverse axis correspondence ray energy, the power spectrum of longitudinal axis correspondence ray number are formed respectively, and the peak area S1 and S2 of correspondence calcium constituent Characteristic γ ray energy peak and element silicon Characteristic γ ray energy peak are identified from power spectrum, data above S1, S2 is transferred to host computer 9 by Multi channel spectrum analysis device 8, and host computer 9 calculates the basicity value P of sintering feed according to following formula：
S1 is the peak area of calcium constituent Characteristic γ ray energy peak in formula, S2 is the peak area of element silicon Characteristic γ ray energy peak, A, B, C, D, E are undetermined coefficient, measured by the different sintering feeds to known basicity, handled and obtained using conventional nonlinear regression by the numerical value of measurement result S1, S2 and corresponding basicity value.
Beneficial effect：
Because finally calculating the ratio relation that obtained basicity value is calcium oxide content and dioxide-containing silica, do not influenceed by the total amount of sintering feed on belt.
The bulk shielding protection of instrument uses two-layer structure, and internal layer is that lead is used to shield gamma-rays, and outer layer is that polyethylene is used for shielding neutron.Lead is placed in internal layer, the usage amount to lead can be reduced, the cost and weight of instrument is reduced.
Detector shield uses two-layer structure, and detector shielding volume surrounding is that polyethylene is used to absorb slow neutron and slowing down fast neutron, makes to be less than 0.5eV through the neutron energy after polyethylene；Detector shield internal layer is cadmium plate, and the neutron to energy less than 0.5eV has extremely strong sink effect.By the two-layer structure of detector shield, the influence by neutron to gamma detector is minimized, and improves the analysis precision of instrument.
Brief description of the drawings
Fig. 1 is the structural representation of device of the present invention
Fig. 2 is the section of structure of protective cover
Fig. 3 is the section of structure of detector shield
In figure：1 time belt, 2 upper belts, 3 neutron sources, 4 wedge-shaped collimating apertures, 5 shielding followers, 6 gamma detectors, 8 Multi channel spectrum analysis devices, 9 host computers, 10 belt holders, 11 measurement bays, 12 protective covers, 13 detector shields, 121 protective cover outer layers, 122 protective cover internal layers, 131 detectors shielding volume surrounding, 132 detector shield internal layers.
Embodiment
It is described with reference to the accompanying drawings the apparatus structure and application method of the present invention.
As shown in Figure 1：
Detector shield 13 is installed between the upper belt 2 at practical application scene and lower belt 1 by measurement bay 11, and shielding follower 5 is installed in the upper belt 2 at practical application scene and the top of sintering feed by measurement bay 11.Measurement bay 11 is fixed by the belt holder 10 at scene, and the outside of measurement bay 11 is provided with protective cover 12.The inside of detector shield 13 is equipped with gamma ray detector 6, and gamma ray detector 6 couples with Multi channel spectrum analysis device 8, and Multi channel spectrum analysis device 8 couples with host computer 9.
Shield and neutron source 3 is housed in follower 5, shielding follower 5 carries out shielding protection to neutron source 3.Shielding follower 5 is provided with the wedge-shaped collimating aperture 4 that can be closed, and when collimating aperture is opened, neutron ray can only irradiate in certain scope, after bore closure is collimated, and entirety is radiationless to leak.When in use, wedge-shaped collimating aperture 4 is opened wide, the neutron that neutron source 3 is sent is aimed downwardly, it is radiated upper belt 2 and carries sintering feed thereon, neutron interacts with the atomic nucleus in sintering feed, atomic nucleus, from stable ground state transition to unstable excitation state, the Characteristic γ ray of different-energy can be discharged when different elements by neutron activation when being activated atomic nucleus from excitation state de excitation.
As shown in Figure 2：12 points of protective cover is two layers, and the material of protective cover internal layer 122 is lead, and the material of protective cover outer layer 121 is polyethylene.
As shown in Figure 3：13 points of detector shield is two layers, and the material of detector shield internal layer 132 is cadmium, and the material of detector shielding volume surrounding 131 is polyethylene.
The application method of the reflective online neutron activation alkalinity analyzing device of sintering feed is as follows：
The gamma-rays received is converted into pulse signal transmission to Multi channel spectrum analysis device 8 by gamma ray detector 6, Multi channel spectrum analysis device 8 transmits the impulse amplitude come to gamma ray detector 6 and is identified, and formation transverse axis corresponds to ray energy, the power spectrum of longitudinal axis correspondence ray number respectively, and the peak area S1 and S2 for corresponding to calcium constituent Characteristic γ ray energy peak and element silicon Characteristic γ ray energy peak are identified from power spectrum.It is Multi channel spectrum analysis device 8 from functional to form power spectrum and automatic peak-seeking, calculate peak area, and its technology is well known in industry.Data above S1, S2 is transferred to host computer 9 by Multi channel spectrum analysis device 8, and host computer 9 calculates the basicity value P of sintering feed according to following formula：
S1 is the peak area of calcium constituent Characteristic γ ray energy peak in formula, S2 is the peak area of element silicon Characteristic γ ray energy peak, A, B, C, D, E are undetermined coefficient, measured by the different sintering feeds to known basicity, handled and obtained using conventional nonlinear regression by the numerical value of measurement result S1, S2 and corresponding basicity value.
Application example：
Neutron source 3 is from the Cf-252 isotopic sources that activity is 10 micrograms；
Gamma detector 6 is from NaI (Tl) scintillator detector that crystalline size is 100 × 100mm of Ф；
The high-speed figure Multi channel spectrum analysis device that Multi channel spectrum analysis device 8 is developed from Dandong Dongfang Measurement ＆ Control Technology Co., Ltd.；
Host computer 9 is from conventional industrial computer；
The material of protective cover internal layer 122 is lead, and thickness is 2 millimeters；
The material of protective cover outer layer 121 is polyethylene, and thickness is 10 centimetres；
The material of detector shield internal layer 132 is cadmium, and thickness is 0.5 millimeter；
The material of detector shielding volume surrounding 131 is polyethylene, and thickness is 5 centimetres；
The commission machining of measurement bay 11 factory makes；
The sintering feed of basicity value known to 20 kinds is measured using instrument model machine, the numerical value for obtaining A, B, C, D, E by nonlinear regression is respectively：A=3.3749, B=9.0012, C=7.0833, D=11.1239, E=0.0097.
Claims (4)
1. a kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed, it is characterized in that：
The online sintering feed alkalinity analyzing instrument of described transmission-type neutron activation includes：Detector shield（13）Pass through measurement bay（11）It is installed in the upper belt at practical application scene（2）With lower belt（1）Between, shield follower（5）Pass through measurement bay（11）It is installed in the upper belt at practical application scene（2）With the top of sintering feed；Measurement bay（11）Pass through the belt holder at scene（10）It is fixed, measurement bay（11）Outside is provided with protective cover（12）；Detector shield（13）Inside is equipped with gamma ray detector（6）, gamma ray detector（6）With Multi channel spectrum analysis device（8）Connection, Multi channel spectrum analysis device（8）With host computer（9）Connection；
Shield follower（5）In be equipped with neutron source（3）, shield follower（5）To neutron source（3）Carry out shielding protection；Shield follower（5）It is provided with the wedge-shaped collimating aperture that can be closed（4）, when collimating aperture is opened, neutron ray can only irradiate in certain scope, after bore closure is collimated, and entirety is radiationless to leak.
2. based on a kind of analysis method of the online neutron activation alkalinity analyzing device of transmission-type sintering feed of claim 1, it is characterized in that：
The online sintering feed alkalinity analyzing instrument of transmission-type neutron activation when in use, wedge-shaped collimating aperture（4）Open wide, neutron source（3）The neutron sent is aimed downwardly, and is radiated upper belt（2）The sintering feed of carrying, neutron interacts with the atomic nucleus in sintering feed, atomic nucleus, from stable ground state transition to unstable excitation state, the Characteristic γ ray of different-energy can be discharged when different elements by neutron activation when being activated atomic nucleus from excitation state de excitation；
Gamma ray detector（6）The gamma-rays received is converted into pulse signal transmission and gives Multi channel spectrum analysis device（8）, Multi channel spectrum analysis device（8）To gamma ray detector（6）The impulse amplitude that transmission comes is identified, and transverse axis correspondence ray energy, the power spectrum of longitudinal axis correspondence ray number are formed respectively, and the peak area S1 and S2 of correspondence calcium constituent Characteristic γ ray energy peak and element silicon Characteristic γ ray energy peak, Multi channel spectrum analysis device are identified from power spectrum（8）Data above S1, S2 is transferred to host computer（9）, host computer（9）The basicity value P of sintering feed is calculated according to following formula：
S1 is the peak area of calcium constituent Characteristic γ ray energy peak in formula, S2 is the peak area of element silicon Characteristic γ ray energy peak, A, B, C, D, E are undetermined coefficient, measured by the different sintering feeds to known basicity, handled and obtained using conventional nonlinear regression by the numerical value of measurement result S1, S2 and corresponding basicity value.
3. the online neutron activation alkalinity analyzing device of a kind of transmission-type sintering feed according to claim 1, it is characterized in that：Protective cover（12）It is divided into two layers, protective cover internal layer（122）Material be lead, protective cover outer layer（121）Material be polyethylene.
4. the online neutron activation alkalinity analyzing device of a kind of transmission-type sintering feed according to claim 1, it is characterized in that：Detector shield（13）It is divided into two layers, detector shield internal layer（132）Material be cadmium, detector shielding volume surrounding（131）Material be polyethylene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610193907.3A CN107290354A (en) | 2016-03-31 | 2016-03-31 | A kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed and analysis method |
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| CN201610193907.3A CN107290354A (en) | 2016-03-31 | 2016-03-31 | A kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed and analysis method |
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| CN201610193907.3A Pending CN107290354A (en) | 2016-03-31 | 2016-03-31 | A kind of online neutron activation alkalinity analyzing device of transmission-type sintering feed and analysis method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108806816A (en) * | 2018-04-18 | 2018-11-13 | 中国科学院合肥物质科学研究院 | A kind of neutron energy spectrum control accurate technology and device |
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