CN108535238A - A kind of ore pulp detection device assisting enhancing laser microprobe using optical-fiber laser - Google Patents
A kind of ore pulp detection device assisting enhancing laser microprobe using optical-fiber laser Download PDFInfo
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- CN108535238A CN108535238A CN201810297905.8A CN201810297905A CN108535238A CN 108535238 A CN108535238 A CN 108535238A CN 201810297905 A CN201810297905 A CN 201810297905A CN 108535238 A CN108535238 A CN 108535238A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/718—Laser microanalysis, i.e. with formation of sample plasma
Abstract
The invention discloses a kind of ore pulp detection devices assisting enhancing laser microprobe using optical-fiber laser, including：Nd:YAG laser, optical fiber laser, light channel structure, spectrometer, ICCD, computing module and sample pump module；Nd:YAG laser is used for ablation mine plasm, and excitation generates plasma；Optical fiber laser assists intensifier pulse laser-produced plasma for heating mine plasm；Light channel structure is used to the laser beam that two lasers generate converging at sample surfaces same point, and acquires the spectrum of plasma and be transmitted in spectrometer；Spectrometer carries out light-splitting processing for acquiring plasma spectrometry；ICCD is used to convert the optical signal of different wave length to electric signal；Computing module is for being handled and being analyzed to electric signal.The present invention can quickly reduce moisture of the laser microprobe near the test point of sample surfaces, effectively improve the intensity, stability and resolution ratio of spectrum, and improve detection speed.
Description
Technical field
The invention belongs to grout inspection technologies and spectrum analysis field, more particularly, to a kind of auxiliary using optical-fiber laser
Help the ore pulp detection device of enhancing laser microprobe.
Background technology
During being processed to the tcrude ore produced, ore dressing is a very important process.It is so-called
Ore dressing exactly extracts useful mineral material from tcrude ore, to obtain high-grade concentrate.And flotation is most often
A kind of beneficiation method, basic principle are anisotropic using the intergranular surface difference of different minerals, and mineral grain is separated
Come, this method can theoretically detach any different material grains.In floatation process, it is necessary first to by the tcrude ore of exploitation
Mineral are crushed and are ground, then carry out mineral dust and floating agent to be mixed to form ore pulp, finally carry out flotation to ore pulp
Operation.In order to fully extract mineral useful in ore pulp, then the grade with reference to ore pulp is needed to adjust the technological parameter of flotation
It is whole, it is very important so carrying out quick online detection to the grade of ore pulp.
Laser microprobe technology is also known as laser induced breakdown spectroscopy (laser-induced breakdown
Spectroscopy, abbreviation LIBS), it is a kind of new technology that can carry out quick online detection, by excitation, acquisition and divides
The atomic emission spectrum for analysing each element in substance, to assess the type and content of each element in substance.The original substantially of the technology
Reason and detection process are as follows：A branch of superlaser is generated first with laser, material surface is treated and carries out ablation and formation etc.
Gas ions；Then utilize spectra collection device, the elemental characteristic spectrum which is emitted in cooling procedure into
Row acquisition；Finally elemental characteristic spectrum is analyzed using computer and spectrum analysis software, to judge each member in substance
The type and content of element.Laser microprobe technology, which has quickly to reproduce, to be analyzed, while detecting multiple element, theoretically detectable element
In periodic table the advantages that all elements, therefore the case detection technique is widely explored and is studied in the application of every field.
Ore pulp is the solidliquid mixture that mineral dust and liquid mix, and has existed simultaneously solid phase and liquid phase, this makes
For LIBS technologies when detecting mine plasm, the liquid in mine plasm largely absorbs laser energy so that generate it is equal from
The daughter lost of life, spectral intensity weaken, and influence acquisition and the precision of analysis of spectroscopic data.It is steamed to reduce liquid
Hair absorbs influence of the laser energy to testing result, needs to pre-process sample accordingly, reduces the moisture in sample.
Currently, have researcher to how reducing the moisture in ore pulp, the accuracy for improving testing result is made that and grinds
Study carefully.Kemal E.Eseller et al. (Appl.Opt., 2010,49 (13)：1673-1681) to be coated with the glass of PVC film as base
Plate carries out drying sample preparation to mine plasm；Krishna K Ayyalasomayajula et al. (Anal.Bioanal.Chem.,
2011,400 (10)：3315-3322) ore pulp is applied on glass slide, then dried to reduce the moisture in ore pulp.Both the above
Method can reduce the moisture in mine plasm, the effective accuracy for improving testing result.But the sample of both methods
Product pretreatment time is too long, is not suitable for industrial quick online detection.
Invention content
In view of the drawbacks of the prior art and Improvement requirement, optical-fiber laser auxiliary enhancing laser is utilized the present invention provides a kind of
The ore pulp detection device of probe, it is intended that the additional energy introduced using optical fiber laser, is quickly reduced laser microprobe and existed
The moisture of Surface testing point is reduced influence of the moisture to testing result in mine plasm by mine, to the plasma to generation
Spectrum plays the role of auxiliary enhancing, improves the stability of testing result.
To achieve the above object, the present invention provides a kind of ore pulp detections assisting enhancing laser microprobe using optical-fiber laser
Device, including：Nd:YAG laser, optical fiber laser, light channel structure, spectrometer, ICCD, computing module and sample pump mould
Block；Sample pump module is used to convert static mine plasm to the vertical ore pulp column of flowing；Nd:YAG laser is used for
The laser pulse for generating relatively high single pulse energy, low-repetition-frequency is produced with ablation mine plasm in mine plasm surface excitation
Raw plasma；Optical fiber laser is used to generate the laser pulse of relatively low single pulse energy, high repetition frequency, to heat ore pulp
Sample evaporates the moisture around breakdown point, assists intensifier pulse laser-produced plasma；Light channel structure is used for Nd:YAG
The laser beam that the laser beam and optical fiber laser that laser generates generate converges at ore pulp column surface same point, and acquisition etc.
The spectrum of gas ions is simultaneously transmitted in spectrometer；Spectrometer is for acquiring plasma spectrometry, and by collected spectral signal
Light-splitting processing is carried out, the optical signal of different wave length is obtained；ICCD is used to acquire the optical signal of different wave length and is translated into electricity
Signal, and by electric signal transmission to computing module；ICCD also with Nd:YAG laser is connected, to obtain the triggering letter for starting acquisition
Number；Computing module is connected with optical fiber laser and ICCD respectively, to control the coordinate operation of optical fiber laser and ICCD, and to electricity
Signal is handled, and draws corresponding spectrogram, so according to the spectrogram plasma characteristic spectrum signal drawn into
Row analysis, and analysis result is shown.
Further, light channel structure includes：First cage cube, the second cage cube, first laser wave mirror,
Dual-laser wave mirror, the first focus lamp, the second focus lamp, spectrum coupling mirror and Transmission Fibers；First laser wavelength is anti-
It penetrates mirror to be set in the first cage cube, center and Nd:The center overlapping of axles for the laser beam that YAG laser generates, and its mirror
Face and the angle of laser transmission direction are 45 °, for so that 90 ° of deflection occurs for the direction of laser beam；Second laser wavelength is anti-
Mirror is penetrated to be set in the second cage cube, center is located on the reflected light path of first laser wave mirror, and its minute surface with
The angle in reflection laser beam Propagation direction is 45 °, for so that 90 ° of deflection occurs for the direction of laser beam；By anti-twice
After penetrating, Nd:Spatial translation occurs for the laser beam that YAG laser generates, and transmission direction is constant；First focus lamp is located at second and swashs
On the reflected light path of optical wavelength speculum, and the center overlapping of axles of central shaft and laser beam, it is used for Nd:YAG laser is produced
Raw laser beam focus is in sample surfaces, and with ablation mine plasm, plasma is generated in mine plasm surface excitation；Second is poly-
Burnt mirror is located at immediately ahead of the laser head of optical fiber laser, and the central shaft weight of central shaft and the laser beam of optical fiber laser generation
It closes, for the laser beam focus that generates optical fiber laser in sample surfaces, and the focus point weight of focus point and the first focus lamp
It closes, to heat sample, evaporates the moisture around breakdown point, assist intensifier pulse laser-produced plasma；Spectrum coupling mirror
It is located at the both sides of the second cage cube, and the center overlapping of axles of the two with the first focus lamp, constitutes coaxial acquisition system；Together
Axis acquisition system is used to plasma characteristics spectrum being coupled into Transmission Fibers, so by plasma characteristics spectral transmissions to
The connected spectrometer of the Transmission Fibers other end.
Further, Nd:The laser beam that YAG laser generates passes through light channel structure with the laser beam that optical fiber laser generates
Afterwards, there are the angles that one is no more than 45 ° for the transmission direction of the two, to ensure abundant ablation mine plasm.
Further, sample pump module includes：Sample container, nozzle, sebific duct, peristaltic pump and changeover valve；Sample holds
For containing mine plasm, bottom is connected by changeover valve with one end of sebific duct device；The other end of sebific duct is connected with nozzle；It is compacted
Dynamic pump is arranged on sebific duct, for being pumped to mine plasm；Sample container and nozzle can be three-dimensional mobile, to adjust laser in ore pulp
Breakdown point position on column, to obtain best detection result；When work, mine plasm is pumped by peristaltic pump, is held from sample
The bottom of device is sprayed into entering glue pipe, and from nozzle, to form the vertical ore pulp column of flowing；Pass through mobile example container and spray
Breakdown point position of the head adjustment laser on ore pulp column, to obtain best detection result.
In general, contemplated above technical scheme through the invention, can obtain following advantageous effect：
(1) the ore pulp detection device provided by the present invention that enhancing laser microprobe is assisted using optical-fiber laser, passes through optical fiber
The INFRARED PULSE LASER IRRADIATION mine plasm of relatively low single pulse energy, high repetition frequency that laser generates, can quickly be reduced sharp
Moisture of the light probe near the test point of sample surfaces reduces liquid evaporation and absorbs influence of the laser energy to testing result,
To effectively improve the intensity, stability and resolution ratio of component spectrum to be detected, and improve detection speed；
(2) the ore pulp detection device provided by the present invention that enhancing laser microprobe is assisted using optical-fiber laser, for assisting
The optical fiber laser of enhancing is at low cost, and photoelectric conversion efficiency is high, and environmental resistance is strong, simple in structure, thus is suitble to commercial Application；
(3) the ore pulp detection device provided by the present invention that enhancing laser microprobe is assisted using optical-fiber laser, light path knot
Structure only used two pieces of speculums and three pieces of focus lamps, and without other complex optical path systems, thus simple and compact, overall volume are opposite
It is smaller, it is conveniently adjusted and safeguards.
Description of the drawings
Fig. 1 is the ore pulp detection device signal provided in an embodiment of the present invention that enhancing laser microprobe is assisted using optical-fiber laser
Figure；
Fig. 2 is the vertical view of focused light passages provided in an embodiment of the present invention and sample container；
Fig. 3 is I 358.119nm feature spectral peaks of ferro element Fe in the ore pulp detected using different ore pulp detection devices；
Fig. 4 is the stabilization of I 358.119nm feature spectral peaks of ferro element Fe in ore pulp when being detected using different ore pulp detection devices
Property comparison diagram；
Fig. 5 is protium H I 656.285nm and oxygen element O I in the ore pulp detected using different ore pulp detection devices
777.194nm feature spectral peaks；(a) the feature spectral peak for being I 656.285nm of protium H in ore pulp；(b) it is oxygen element O I in ore pulp
777.194nm feature spectral peaks；
Fig. 6 is the connection diagram that ore pulp detection device provided in an embodiment of the present invention carries out on-line checking；
In all the appended drawings, identical reference numeral is used for indicating identical element or structure, wherein：
1 is Nd:YAG laser, 2 be optical fiber laser, and 3 be light channel structure, and 4 be spectrometer, and 5 be ICCD, and 6 be calculating mould
Block, 7 be sample pump module, and 21 be optical fiber laser host, and 22 is mix yttrium optical fiber, and 23 be optical fiber laser laser head, and 31 are
First cage cube, 32 be the second cage cube, and 33 be first laser wave mirror, and 34 be second laser wave mirror,
35 be the first focus lamp, and 36 be the second focus lamp, and 37 be spectrum coupling mirror, and 38 be Transmission Fibers, and 71 be sample container, and 72 be spray
Head, 73 be sebific duct, and 74 be peristaltic pump, and 75 be changeover valve.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below that
Conflict is not constituted between this to can be combined with each other.
The ore pulp detection device provided by the invention that enhancing laser microprobe is assisted using optical-fiber laser, as shown in Figure 1, packet
It includes：Nd:YAG laser 1, optical fiber laser 2, light channel structure 3, spectrometer 4, ICCD 5, computing module 6 and sample pump mould
Block 7；Sample pump module 7 is used to convert static mine plasm to the vertical ore pulp column of flowing；Nd:YAG laser 1 is used
In the laser pulse for generating relatively high single pulse energy, low-repetition-frequency, with ablation mine plasm, in mine plasm surface excitation
Generate plasma；Optical fiber laser 2 is used to generate the laser pulse of relatively low single pulse energy, high repetition frequency, with heating
Mine plasm evaporates the moisture around breakdown point, assists intensifier pulse laser-produced plasma；Light channel structure 3 is used for will
Nd:The laser beam that the laser beam and optical fiber laser 2 that YAG laser 1 generates generate converges at mine plasm surface same point,
And it acquires the spectrum of plasma and is transmitted in spectrometer 4；Spectrometer 4 will be acquired for acquiring plasma spectrometry
The spectral signal arrived carries out light-splitting processing, obtains the optical signal of different wave length；ICCD 5 is used to acquire the optical signal of different wave length
And it is translated into electric signal, and by electric signal transmission to computing module 6；ICCD 5 is gone back and Nd:YAG laser 1 passes through triggering
Line is connected, Nd:YAG laser 1 generate Q-Switch (Q-switch) signals by firing line be transferred to ICCD 5 using as
It starts the trigger signal for acquiring signal, and then adjusts the acquisition parameter of ICCD 5；Computing module 6 respectively with optical fiber laser 2
It is connected by USB data line with ICCD 5, to control the coordinate operation of optical fiber laser 2 and ICCD 5, and electric signal is carried out
Processing, draws corresponding spectrogram, and then analyzed according to the spectrogram plasma characteristic spectrum signal drawn, and
Analysis result is shown.
In the present embodiment, Nd:The direction of a length of 1064nm of laser beam-wave that YAG laser 1 generates, laser beam are from left
To the right；What optical fiber laser 2 generated is 1064nm with regard to light beam wavelength, and laser beam is generated by optical fiber laser host 21, by mixing
Yttrium optical fiber 22 is amplified, and is finally integrated and is exported by optical fiber laser laser head 23.
Light channel structure 3 includes：First cage cube 31, the second cage cube 32, first laser wave mirror 33, second
Optical maser wavelength speculum 34, the first focus lamp 35, the second focus lamp 36, spectrum coupling mirror 37 and Transmission Fibers 38；First swashs
Optical wavelength speculum 33 is set to 31 in the first cage cube, center and Nd:The center for the laser beam that YAG laser 1 generates
Overlapping of axles, and its minute surface and the angle of laser transmission direction are 45 °, for so that 90 ° of deflection occurs for the direction of laser beam；
In the present embodiment, Nd:The a length of 1064nm of laser beam-wave that YAG laser 1 generates, the direction of laser beam are from left to right, to pass through
After the reflection of first laser wave mirror 33, the transmission direction of laser beam is from top to bottom；Second laser wave mirror 34
Be set in the second cage cube 32, center is located on the reflected light path of first laser wave mirror 33, and its minute surface with
The angle in reflection laser beam Propagation direction is 45 °, for so that 90 ° of deflection occurs for the direction of laser beam；By anti-twice
After penetrating, Nd:Spatial translation occurs for the laser beam that YAG laser 1 generates, and transmission direction is constant, remains as from left to right；First
Cage cube 31 and the second cage cube are regular cube structure, and circular through hole is equipped on six faces of the two, and the
One cage cube 31 and the second cage cube are vertically connected by connecting rod；
First focus lamp 35 is located on the reflected light path of second laser wave mirror 34, and central shaft and laser beam
Center overlapping of axles are used for Nd:The laser beam focus that YAG laser 1 generates is in sample surfaces, with ablation mine plasm, in mine
Slurry samples surface excitation generates plasma；Second focus lamp 36 is located at 23 front of optical fiber laser laser head, and its center
The center overlapping of axles for the laser beam that axis is generated with optical fiber laser 2, the laser beam focus for generating optical fiber laser 2 is in sample
Product surface, and focus point is overlapped with the focus point of the first focus lamp 35, to heat sample, evaporates the moisture around breakdown point, it is auxiliary
Help intensifier pulse laser-produced plasma；Spectrum coupling mirror 37 and the first focus lamp 35 are located at the second cage cube 32
Both sides, and center overlapping of axles of the two constitute coaxial acquisition system；Coaxial acquisition system is used for plasma characteristics spectrum
It is coupled into Transmission Fibers 38, and then the spectrometer 4 that plasma characteristics spectral transmissions are extremely connected with 38 other end of Transmission Fibers.
In the present embodiment, what optical fiber laser 2 generated is 1064nm with regard to light beam wavelength, and laser beam is by optical fiber laser master
Machine 21 generates, and is amplified by mixing yttrium optical fiber 22, is finally integrated and is exported by optical fiber laser laser head 23；Nd:YAG laser
The laser beam that 1 laser beam generated is generated with optical fiber laser 2 is after light channel structure 3, and there are one for the transmission direction of the two
20 ° of angle, as shown in Fig. 2, to ensure abundant ablation mine plasm.
Sample pump module 7 includes：Sample container 71, nozzle 72, sebific duct 73, peristaltic pump 74 and changeover valve 75；Sample
For containing mine plasm, bottom is connected by changeover valve 75 with one end of sebific duct 73 container 71；The other end of sebific duct 73 with
Nozzle 72 is connected；Peristaltic pump 74 is arranged on sebific duct 73, for being pumped to mine plasm；Sample container 71 and nozzle 72 can be three-dimensional
It is mobile, to adjust breakdown point position of the laser on ore pulp column, to obtain best detection result；
When work, mine plasm is pumped by peristaltic pump 74, from the bottom of sample container 71 into entering glue pipe 73, and from nozzle 72
It sprays, to form the vertical ore pulp column of flowing；Laser is adjusted on ore pulp column by mobile example container 71 and nozzle 72
Breakdown point position, to obtain best detection result.
It is first when the ore pulp detection device detection for assisting enhancing laser microprobe using optical-fiber laser provided using invention
First, whether each optical device of check device is not damaged, Nd:YAG laser 1, optical fiber laser host 21, optical fiber laser
Whether laser head 23, peristaltic pump 74, computing module 6, ICCD 5, spectrometer 4 can work normally；Sample container 71 and nozzle 72 are
No no blocking, sebific duct 73 whether without breakage without blocking, it is intact whether sebific duct 73 connect with changeover valve 75 and nozzle 72.
Then, iron ore ore pulp is prepared using iron ore national standard substance GBW (E) 070085 and distilled water, will matched
The iron ore ore pulp set is added into sample container 71；Start peristaltic pump 74, by ore slurry pump entering glue pipe 73 and at nozzle 72
Form stable ore pulp column.The mineral slurry flux used in present embodiment is 284.1mL/min；The position for adjusting nozzle 72, makes
The focus of laser beam is just in the front surface of ore pulp column.
Optical fiber laser host 21 is first opened, so that optical fiber laser laser head 23 is exported high frequency lasers always, to ore pulp column
Surface carries out pre-ablation, evaporates the moisture near test point, generates a thermal environment；It is then turned on Nd:YAG laser 1, at this
Plasma is inspired in thermal environment；Finally, plasma spectrometry is collected by spectrometer 4 and ICCD 5, handle and
Analysis.
In order to obtain best testing result, then need to adjust Nd:YAG laser 1, optical fiber laser host 21, ICCD
5 parameter keeps the spectrum effects collected best.Experiment parameter used by present embodiment is：Nd:YAG laser 1
Wavelength is 1064nm, laser single-pulse energy 50mJ, frequency 10Hz；Optical fiber laser laser head 23 export wavelength be
1064nm, laser single-pulse energy 0.5mJ, frequency 100kHz；The acquisition gate-width of ICCD 5 is 10 μ s, is delayed as 8 μ s, often
Width spectrogram accumulates 100 laser pulses.
Using I 358.119nm of ferro element Fe as reference element, ore pulp detection device and tradition as shown in Figure 1 is respectively adopted
Laser microprobe detection plasma spectrum, spectrum improvement is as seen in figures 3-5.Under the above experiment condition, optical fiber swashs
The intensity for the I 358.119nm feature spectral peaks of ferro element Fe that light auxiliary enhancing laser microprobe system detectio arrives is than conventional laser probe
Improve about 3.5 times, as shown in figure 3, and spectrum stability RSD (relative standard deviation, phase
To standard deviation) about 3% is reduced, as shown in Figure 4.As shown in Fig. 5 (a) and Fig. 5 (b), optical-fiber laser auxiliary enhancing laser
The I 777.194nm features spectral strength of protium H I 656.285nm and oxygen element O that probe system detects compares conventional laser
Probe is low, illustrates that optical fiber laser has largely evaporated the moisture near test point really, a thermal environment is formd, to reduce
The influence that moisture plasma generates in sample, improves the quality of plasma spectrometry.
After detection, an empty beaker is placed on to the lower section of sample container 71, changeover valve 75 is opened, unclamps sebific duct 73
The one end being connected with sample container 71, allow the mine plasm in sample container 71 to flow into beaker；In addition prepare one to fill
The beaker of distilled water, one end that sebific duct 73 unclamps are put into beaker, and pattern extraction distilled water is got express developed using peristaltic pump 74,
To rinse sebific duct 73 and sample container 71；It is to be rinsed it is clean after, then one end that sebific duct 73 unclamps taken back into changeover valve 75, then can be into
A kind of detection of sample under row.
As shown in fig. 6, by being opened at changeover valve 75, sebific duct 73 is allowed to access in ore pulp delivery tube, you can be carried out to ore pulp real
When on-line checking.
The ore pulp detection device provided by the invention that enhancing laser microprobe is assisted using optical-fiber laser, utilizes optical fiber laser
Pre-ablation is carried out to mine plasm, reduces the moisture near sample surfaces test point, forms a stable thermal environment, to fast
Influence of the fast online reduction moisture to testing result, improves detection speed, improves the intensity of plasma characteristics spectrum, stablize
Property and resolution ratio.The experimental results showed that device can effectively improve the spectral intensity and spectrum of plasma characteristics spectrum
Stability, to improve the detectability and credible result degree of detecting system；In addition, device light channel structure simple and compact, whole
Body is small, is conveniently adjusted and safeguards；And optical fiber laser has many advantages, such as at low cost, photoelectric conversion efficiency is high, very suitable
Close commercial Application.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (4)
1. a kind of ore pulp detection device assisting enhancing laser microprobe using optical-fiber laser, which is characterized in that including：Nd:YAG swashs
Light device (1), optical fiber laser (2), light channel structure (3), spectrometer (4), ICCD (5), computing module (6) and sample pump mould
Block (7)；
The sample pump module (7) is used to convert static mine plasm to the vertical ore pulp column of flowing；The Nd:
YAG laser (1) is used to generate the laser pulse of relatively high single pulse energy, low-repetition-frequency, with ablation mine plasm, in mine
Slurry samples surface excitation generates plasma；The optical fiber laser (2) is for generating relatively low single pulse energy, high repetition frequency
The laser pulse of rate evaporates the moisture around breakdown point, the plasma that auxiliary intensifier pulse laser generates to heat mine plasm
Body；The light channel structure (3) is used for the Nd:The laser beam and the optical fiber laser (2) that YAG laser (1) generates
The laser beam of generation converges at ore pulp column surface same point, and acquires the spectrum of plasma and be transmitted to the spectrometer
(4) in；The spectrometer (4) carries out light-splitting processing for acquiring plasma spectrometry, and by collected spectral signal, obtains
The optical signal of different wave length；The ICCD (5) is used to acquire the optical signal of the different wave length and is translated into electric signal, and
By the electric signal transmission to the computing module (6)；The ICCD (5) also with the Nd:YAG laser (1) is connected, to obtain
Take away the trigger signal for acquisition of beginning；The computing module (6) is connected with the optical fiber laser (2) and the ICCD (5) respectively,
To control the coordinate operation of the optical fiber laser (2) and the ICCD (5), and the electric signal is handled, draws phase
The spectrogram answered, and then analyzed according to the spectrogram plasma characteristic spectrum signal drawn, and by analysis result
It is shown.
2. utilizing the ore pulp detection device of optical-fiber laser auxiliary enhancing laser microprobe as described in claim 1, which is characterized in that
The light channel structure (3) includes：First cage cube (31), the second cage cube (32), first laser wave mirror (33),
Second laser wave mirror (34), the first focus lamp (35), the second focus lamp (36), spectrum coupling mirror (37) and transmission light
Fine (38)；
The first laser wave mirror (33) is set in first cage cube (31), center and the Nd:YAG
The center overlapping of axles for the laser beam that laser (1) generates, and its minute surface and the angle of laser transmission direction are 45 °, for making
90 ° of deflection occurs for the direction of laser beam；The second laser wave mirror (34) is set to second cage cube
(32) in, center is located on the reflected light path of the first laser wave mirror (33), and minute surface and reflection laser light beam
The angle of transmission direction is 45 °, for so that 90 ° of deflection occurs for the direction of laser beam；After two secondary reflections, the Nd:
Spatial translation occurs for the laser beam that YAG laser (1) generates, and transmission direction is constant；
First focus lamp (35) is located on the reflected light path of the second laser wave mirror (34), and central shaft with
The center overlapping of axles of laser beam are used for the Nd:The laser beam focus that YAG laser (1) generates is in sample surfaces, with ablation
Mine plasm generates plasma in mine plasm surface excitation；Second focus lamp (36) is located at the optical fiber laser
(2) immediately ahead of laser head, and the center overlapping of axles of central shaft and the laser beam of the optical fiber laser (2) generation, it is used for
The laser beam focus that the optical fiber laser (2) is generated is in sample surfaces, and focus point and first focus lamp (35)
Focus point overlaps, and to heat sample, evaporates the moisture around breakdown point, assists intensifier pulse laser-produced plasma；
The spectrum coupling mirror (37) is located at the both sides of second cage cube (32) with first focus lamp (35),
And the center overlapping of axles of the two, constitute coaxial acquisition system；The coaxial acquisition system is used for plasma characteristics spectrum coupling
It closes into the Transmission Fibers (38), and then plasma characteristics spectral transmissions is extremely connected with the Transmission Fibers (38) other end
The spectrometer (4).
3. utilizing the ore pulp detection device of optical-fiber laser auxiliary enhancing laser microprobe as described in claim 1, which is characterized in that
The Nd:The laser beam that YAG laser (1) generates passes through the light path knot with the laser beam that the optical fiber laser (2) generates
After structure (3), there are the angles that one is no more than 45 ° for the transmission direction of the two, to ensure abundant ablation mine plasm.
4. utilizing the ore pulp detection device of optical-fiber laser auxiliary enhancing laser microprobe as described in claim 1, which is characterized in that
The sample pump module (7) includes：Sample container (71), nozzle (72), sebific duct (73), peristaltic pump (74) and changeover valve
(75)；
The sample container (71) passes through the changeover valve (75) and the sebific duct (73) for containing mine plasm, bottom end
One end is connected；The other end of the sebific duct (73) is connected with the nozzle (72)；The peristaltic pump (74) is arranged in the sebific duct
(73) on, for being pumped to mine plasm；The sample container (71) and the nozzle (72) can be three-dimensional mobile, to adjust laser
Breakdown point position on ore pulp column, to obtain best detection result；
When work, mine plasm is pumped by the peristaltic pump (74), enters the sebific duct from the bottom of the sample container (71)
(73), it and from the nozzle (72) sprays, to form the vertical ore pulp column of flowing；Pass through the movement sample container (71)
Breakdown point position of the laser on ore pulp column is adjusted with the nozzle (72), to obtain best detection result.
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| CN114166829A (en) * | 2021-12-08 | 2022-03-11 | 华中科技大学鄂州工业技术研究院 | Slurry uniformity detection system and method |
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