CN203490183U - Microwave resonance absorption-based iron mine analysis device - Google Patents
Microwave resonance absorption-based iron mine analysis device Download PDFInfo
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- CN203490183U CN203490183U CN201320589603.0U CN201320589603U CN203490183U CN 203490183 U CN203490183 U CN 203490183U CN 201320589603 U CN201320589603 U CN 201320589603U CN 203490183 U CN203490183 U CN 203490183U
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- microwave
- waveguide
- iron ore
- frequency
- amplifier
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Abstract
The utility model relates to a microwave resonance absorption-based iron mine analysis device, which comprises a microwave circulator, an incident waveguide, a detection waveguide and a short-circuit waveguide; the three waveguide sections are connected to be T-shaped by the microwave circulator. Microwave resonance absorption curves of an iron mine powder sample under different low-frequency magnetic fields are measured, and the microwave resonance absorption curves are compared with the standard curves of each component, so components and the proportion of each component in the iron mine powder sample are obtained.
Description
Technical field
The utility model relates to the material phase analysis of composition in iron ore, refers to particularly a kind of iron ore analytical equipment absorbing based on microwave resonance.
Background technology
Iron ore is that its principal ingredient comprises: magnetic iron ore (Fe for refining the mineral matter of the iron content of the simple substance pig iron, steel-making
3o
4), haematite (Fe
2o
3), limonite (FeO (OH)), ilmenite (FeTiO
3), siderite (FeCO
3), pyrite (FeS
2).Because the iron ore composition in the different places of production exists huge difference, therefore, in exploitation, smelting or foreign trade checkout procedure, need to determine the composition of iron ore.
Traditional iron ore method of inspection mainly contains wet chemical analysis method and X-ray fluorescence spectra analytic approach.
Wherein, first wet chemical analysis method is used strong acid or highly basic to dissolve ore, re-use that different chemical reagent transforms, in precipitation solution different valence state mineral ion to measure.This method not only expends plenty of time and energy, and includes malicious chemical reagent, unfavorable to environment and operator ' s health.
X-ray fluorescence spectra analytic approach is can cause based on different valence state element ion the principle that X ray characteristic spectrum fine structure changes, when analyzing, use the x-ray bombardment mineral dust of different-energy or different frequency, the variation of the X ray characteristic spectral line in detection of reflected light, the more corresponding software of combination quantitatively calculates the composition of iron ore.But, the common volume of XRF equipment is larger, accessory by costlinesses such as X-ray tube, high-voltage power supply and stable-pressure device, analyzing crystal, collimating apparatus, detecting device, impulse radiation analyzer, calibration meter, timer, integrator, register, vacuum pump, liquid nitrogen cooling systems forms, and operation and maintenance cost is all very high.
Therefore, be necessary to study a kind of can be simply, fast, the device of composition in accurate analysis iron ore.
Summary of the invention
The utility model object is to overcome above-mentioned the deficiencies in the prior art and a kind of iron ore analytical equipment absorbing based on microwave resonance is provided, and this analytical equipment is simple in structure, easy to use, and analysis result is accurate.
The technical scheme that realizes the employing of the utility model object is: a kind of iron ore analytical equipment absorbing based on microwave resonance, and this device comprises:
One microwave circulator, it comprises three ports, described three ports are connected with respectively incident waveguide, detect waveguide and for placing the short circuited waveguide of iron ore powdered sample to be measured, described incident waveguide and detect waveguide and be positioned on a straight line, and described short circuited waveguide is vertical with described straight line;
One microwave source, is connected with described incident waveguide;
One electromagnet, comprises two iron cores, in the gap of described short circuited waveguide between described two iron cores; And
One detector diode, is connected with described detection waveguide;
The high-frequency microwave that described microwave source produces enters microwave circulator from incident waveguide, microwave circulator is controlled the transmission direction of high-frequency microwave, high-frequency microwave in incident waveguide is imported in short circuited waveguide, high-frequency microwave imports detection waveguide into through circulator again after short circuited waveguide bottom reflection, and the high-frequency microwave entering in short circuited waveguide is spatially mutually vertical with the low frequency magnetic field of electromagnet generation.
Further, described electromagnet also comprises:
One Helmholtz's modulation coil, is around on described two iron cores; And
One note amplifier, its output terminal is connected with described Helmholtz's modulation coil.
The principle that the utility model absorbs according to microwave resonance, iron ore powdered sample to be measured is placed in to the magnetic field space in the orthogonal low frequency magnetic field of magnetic direction and high-frequency microwave magnetic field, by changing the intensity of described low frequency magnetic field, obtain the microwave resonance absorption curve after described iron ore powder absorption of sample under different low frequency magnetic field intensity, then the typical curve of microwave resonance absorption curve and each composition is compared, thereby draw composition in described iron ore powdered sample and the ratio of each composition.
Accompanying drawing explanation
Fig. 1 is the structural representation of the iron ore analytical equipment of the utility model based on microwave resonance absorption.
Number in the figure is: 1-microwave source, and 2-first coaxially turns waveguide adapter, 3-the first isolator, 4-incident waveguide, 5-microwave circulator, 6-detects waveguide, 7-the second isolator, 8-second coaxially turns waveguide adapter, 9-short circuited waveguide, 10-testing sample, 11-detector diode, 12-isolated amplifier, 13-gaussmeter, 14-hall probe, 15-electromagnet (wherein, 15.1-iron core, 15.2-modulation coil, 15.3-direct supply, 15.4-gap), 16-note amplifier, 17-lock-in amplifier, 18-computing machine, 19-GPIB card.
Fig. 2 is typical m (H
dc) function curve diagram.
Fig. 3 is typical P
abs(H
dc) curve map.
Fig. 4 is the curve of microwave resonance absorbed power and the absorption curve comparison chart of standard model of testing sample.
Embodiment
Below in conjunction with meeting the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the iron ore analytical equipment that the utility model absorbs based on microwave resonance comprises: microwave circulator 5, incident waveguide 4, detection waveguide 6 and short circuited waveguide 9, microwave circulator 5 comprises three ports, three ports are connected with respectively incident waveguide, detect waveguide and for placing the short circuited waveguide of iron ore powdered sample to be measured, three sections of waveguides connect into " T " font by three ports, be that described incident waveguide and detection waveguide are positioned on a straight line, thus described short circuited waveguide formation vertical with described straight line " T " font;
Microwave source 1 coaxially turns waveguide adapter 2 by first successively and is connected with incident waveguide 4 with the first isolator 3.
Testing sample 10 is housed in short circuited waveguide 9, and testing sample 10 is positioned at the low frequency magnetic field centre that electromagnet 15 produces.
Microwave source 1 is for generation of high-frequency microwave magnetic field, the frequency in this high-frequency microwave magnetic field is at X-band (in the present embodiment, X-band is according to IEEE521-2002 standard, frequency is at the radio waveband of 8-12GHz), the high-frequency microwave that microwave source 1 produces enters microwave circulator 5 from incident waveguide 4, microwave circulator 5 is for controlling the transmission direction of high-frequency microwave, high-frequency microwave in incident waveguide 4 is imported in short circuited waveguide 9, high-frequency microwave imports into and detects waveguide 6 through circulator again after short circuited waveguide 9 bottom reflection, the high-frequency microwave entering in short circuited waveguide 9 is spatially mutually vertical with the low frequency magnetic field of electromagnet 15 generations.
In the present embodiment, the low frequency magnetic field H that electromagnet 15 produces
dc, H
dcfor constant bias magnetic field, low frequency magnetic field H
dcintensity is adjustable continuously within the scope of 0～3500Oe, changes H
dcsize, at each H
dcunder value, the microwave transmission being absorbed by testing sample 10 by microwave circulator 5 controls, to detecting in waveguide 6, detects waveguide 6 and exports detector diode 9 to, and detector diode 9 detects at each H
dcunder value, the microwave power P that testing sample 10 absorbs
abs(H
dc).
Power input P in incident waveguide 4
incbe expressed as:
P
inc=P
ref+P
abs+P
los+P
det
In formula, P
reffor the microwave power of reflection in incident waveguide 4, P
absfor the microwave power that testing sample 10 absorbs in short circuited waveguide 9, P
losfor the microwave power of loss, P
detfor detector diode 11 is at the microwave power that detects waveguide 6 absorptions.
V
d=K
dP
det=K
d(P
inc-P
ref-P
abs-P
los)
Because testing sample 10 is at constant external magnetic field H
dceffect issues magnetisation, and the first magnetic moment in material can be take external magnetic field as axle precessional motion.Owing to there being damping, this precessional motion meeting attenuates very soon, makes final first magnetic moment direction consistent with outer magnetic field direction.If but in precession plane be and constant external magnetic field H
dcin vertical plane, apply a high-frequency microwave magnetic field, magnetic moment motion can absorb energy with the damping that contends with from high-frequency microwave magnetic field.When high-frequency microwave magnetic field is consistent with magnetic moment precession frequency, can resonate in magnetic moment precession and high-frequency microwave magnetic field, and now material absorbs and reaches maximum high-frequency microwave magnetic field energy.High-frequency microwave magnetic field can drive magnetic moment precessional motion in testing sample 10, therefore can absorb the microwave energy identical with its precessional motion frequency.The magnetic moment of each composition in testing sample 10, can be characterized by an absorption peak.Therefore,, because the precession frequency of the outer different magnetic moment of an orbital electron of atom is different, by the microwave absorption peak of test material, can differentiate the composition of material.The utility model detects detector diode 11 output voltage V
dobtain the curve of the microwave resonance absorbed power of testing sample 10, thereby realize the discriminating to testing sample 10 each compositions.
The utility model can also compare with the microwave resonance curve of standard model the ratio that draws each composition in described iron ore powdered sample by the microwave resonance absorption curve of described iron ore powdered sample, specifically comprises the following steps:
1) measure respectively the standard microwave resonance curve of the standard model of certain mass heterogeneity.
2) calculate the index plane ratio of the corresponding Curves area coverage of each composition in described standard microwave resonance curve; Suppose that in step 1), the composition of getting is A, B, C ..., A, B, C ... the standard ratio of standard microwave resonance curve area coverage is a1: b1: c1: ...
3) with reference to the corresponding horizontal ordinate of described standard microwave resonance curve, each tie element in the microwave resonance absorption curve of described iron ore powdered sample is demarcated.
4) use multimodal approximating method to carry out separation to the peak of each composition of microwave resonance absorption curve of described iron ore powdered sample, calculate the actual measurement ratio of each peak area coverage; After being compared with identical component in actual measurement ratio, standard ratio compares with other composition again, thereby obtain the mass ratio of each composition, suppose composition A, B, C in testing sample 10 ... corresponding peak area coverage is than being a2: b2: c2 ..., each composition quality ratio is (a2/a1): (b2/b1): (c2/c1) ...
In the utility model, the microwave power absorbing due to testing sample 10 is very small and weak, by prior art means, cannot effectively directly measure, therefore, the iron ore analytical equipment that the utility model absorbs based on microwave resonance also provides a kind of preferred implementation, by the microwave energy that adopts the method Measurement accuracy testing sample 10 of modulation /demodulation to absorb.In the present embodiment, electromagnet 15 comprises: two iron cores 15.1, be around in the modulation coil 15.2 on two iron cores 15.1, and provide the direct supply 15.3 of power supply for electromagnet 15, wherein between two iron cores 15.1, have a gap 15.4, the testing sample being positioned in short circuited waveguide 9 is arranged in this gap 15.4.In the present embodiment, modulation coil 15.2 used is Helmholtz's modulation coil.
The two ends of modulation coil 15.2 are connected with two output terminals of note amplifier 16 respectively, the input end of note amplifier 16 is connected with the reference frequency output terminal of lock-in amplifier 17, the isolated amplifier 12 that passes through of lock-in amplifier 17 is connected with detector diode 11, detector diode 5 is used for detecting the microwave power after testing sample 10 absorbs, and isolated amplifier 12 is used for the output signal of pre-amplification detector diode 11.
In this preferred embodiment, the output of the reference frequency of lock-in amplifier 17 connects the input end of note amplifier 15, makes the frequency in amplitude modulation(PAM) magnetic field and the reference frequency of phase-locked amplification consistent.The output of note amplifier 16 is connected on modulation coil 15.2, to drive modulation coil 15.2 to produce amplitude modulation(PAM) magnetic field
amplitude modulation(PAM) magnetic field H
hlow frequency magnetic field H with electromagnet 15 generations
dcstack forms low frequency magnetic field H
t, H
t=H
t=H
dc+ H
hcos (ω t+ θ).In the present embodiment, amplitude modulation(PAM) magnetic field intensity is less than 100Oe, and the frequency of modulated magnetic field is 10～100Hz.
Amplitude H when amplitude modulation(PAM) magnetic field
hmuch smaller than permanent magnetic field H
dctime, changes of magnetic field Δ H
tinstitute causes absorption of sample power changes delta P
absmeet following linear relationship:
ΔP
abs=mΔH
t+C
In formula, m is P
abs(H
dc) slope under a certain stationary magnetic field, i.e. m=dP
abs/ dH
dc, typical m (H
dc) function curve as shown in Figure 2.
Detector diode is exported to V
dmodulation signal H with low frequency magnetic field
hcos (ω t+ θ) inputs lock-in amplifier 17 simultaneously, lock-in amplifier 17 output valve V
qbe proportional in detector diode 11 output signals and modulating frequency same frequency signal amplitude partly, that is:
V
Q=-mK
psdK
d(V
0/2)H
hsin(φ)
In formula, K
psdfor the constant with the inner phase detector circuit relating to parameters of lock-in amplifier 17, φ is the poor of input signal and lock-in amplifier internal reference signal, and when lock-in amplifier 17 working stability, φ is a constant, V
0signal gain for lock-in amplifier 17 inner phase detectors.
The utility model is used detector diode 11 to pick up the microwave magnetic field after absorption of sample, uses lock-in amplifier 17 to detect the slope that microwave magnetic field power changes with modulated magnetic field, by changing low frequency magnetic field H
th
dcpart, measures respectively different H
dcbe worth corresponding m value, detect different H
dcbe worth corresponding m value, by m to H
dccarry out integration, draw the microwave resonance absorbed power P of testing sample 10
abs(H
dc), typical P
abs(H
dc) curve as shown in Figure 3.
The present embodiment is according to detector diode 11 output voltage V
dobtain the curve of the microwave resonance absorbed power of testing sample 10, by the curve of the microwave resonance absorbed power of testing sample 10 and standard model (as Fe
3o
4, Fe
2o
3, FeO (OH), FeTiO
3, FeCO
3, FeS
2deng composition) absorption curve compare, can mark the composition that each absorption peak is corresponding, as shown in Figure 4.
In order to facilitate Real-time Obtaining data, this embodiment also comprises gpib bus and connects computing machine 18, lock-in amplifier 17, direct supply 15.3 are connected on gpib bus, computing machine 18 is provided with the GPIB card 19 for carrying out data communication with gpib bus, adopts Labview control survey system and image data.Hall probe 14 inserts in the gap 15.4 of two electromagnetic core middles, for measuring the magnetic field intensity of two pairs of electromagnetic core middles.The output terminal of hall probe 14 is connected with the input end of gaussmeter 13, and the output terminal of gaussmeter 13 is connected on gpib bus.
Claims (6)
1. the iron ore analytical equipment absorbing based on microwave resonance, is characterized in that, comprising:
One microwave circulator, it comprises three ports, described three ports are connected with respectively incident waveguide, detect waveguide and for placing the short circuited waveguide of iron ore powdered sample to be measured, described incident waveguide and detect waveguide and be positioned on a straight line, and described short circuited waveguide is vertical with described straight line;
One microwave source, is connected with described incident waveguide;
One electromagnet, comprises two iron cores, in the gap of described short circuited waveguide between described two iron cores; And
One detector diode, is connected with described detection waveguide;
The high-frequency microwave that described microwave source produces enters microwave circulator from incident waveguide, microwave circulator is controlled the transmission direction of high-frequency microwave, high-frequency microwave in incident waveguide is imported in short circuited waveguide, high-frequency microwave imports detection waveguide into through circulator again after short circuited waveguide bottom reflection, and the high-frequency microwave entering in short circuited waveguide is spatially mutually vertical with the low frequency magnetic field of electromagnet generation.
2. the iron ore analytical equipment absorbing based on microwave resonance according to claim 1, is characterized in that, described electromagnet also comprises:
One Helmholtz's modulation coil, is around on described two iron cores; And
One note amplifier, its output terminal is connected with described Helmholtz's modulation coil.
3. the iron ore analytical equipment absorbing based on microwave resonance according to claim 2, is characterized in that, also comprises:
One lock-in amplifier, its reference frequency output terminal is connected in the input end of described note amplifier, and its input end is connected with described detector diode output terminal.
4. the iron ore analytical equipment absorbing based on microwave resonance according to claim 3, is characterized in that, also comprises:
One isolated amplifier, is connected in the input end of described detector diode output terminal and lock-in amplifier.
5. the iron ore analytical equipment absorbing based on microwave resonance according to claim 4, is characterized in that, also comprises:
One hall probe, is located in the gap between described two iron cores; And
One gaussmeter, is connected with described hall probe.
6. the iron ore analytical equipment absorbing based on microwave resonance according to claim 5, is characterized in that, also comprises:
One computing machine; And
One data bus, described computing machine, lock-in amplifier, gaussmeter are connected on this data bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320589603.0U CN203490183U (en) | 2013-09-24 | 2013-09-24 | Microwave resonance absorption-based iron mine analysis device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320589603.0U CN203490183U (en) | 2013-09-24 | 2013-09-24 | Microwave resonance absorption-based iron mine analysis device |
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| Publication Number | Publication Date |
|---|---|
| CN203490183U true CN203490183U (en) | 2014-03-19 |
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ID=50261005
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|---|---|---|---|
| CN201320589603.0U Expired - Fee Related CN203490183U (en) | 2013-09-24 | 2013-09-24 | Microwave resonance absorption-based iron mine analysis device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472073A (en) * | 2013-09-24 | 2013-12-25 | 中国船舶重工集团公司第七一九研究所 | Iron ore analysis method and device based on microwave resonance absorption |
| WO2023144250A1 (en) * | 2022-01-28 | 2023-08-03 | Senfit Oy | Measurement apparatus for and measurement method of measuring moisture of mineral material |
-
2013
- 2013-09-24 CN CN201320589603.0U patent/CN203490183U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472073A (en) * | 2013-09-24 | 2013-12-25 | 中国船舶重工集团公司第七一九研究所 | Iron ore analysis method and device based on microwave resonance absorption |
| CN103472073B (en) * | 2013-09-24 | 2016-03-16 | 中国船舶重工集团公司第七一九研究所 | Based on iron ore analytical approach and the device of microwave resonance absorption |
| WO2023144250A1 (en) * | 2022-01-28 | 2023-08-03 | Senfit Oy | Measurement apparatus for and measurement method of measuring moisture of mineral material |
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Granted publication date: 20140319 Termination date: 20190924 |