CN109975274B - Online rapid detection device for silicon content of molten iron of blast furnace - Google Patents
Online rapid detection device for silicon content of molten iron of blast furnace Download PDFInfo
- Publication number
- CN109975274B CN109975274B CN201910304147.2A CN201910304147A CN109975274B CN 109975274 B CN109975274 B CN 109975274B CN 201910304147 A CN201910304147 A CN 201910304147A CN 109975274 B CN109975274 B CN 109975274B
- Authority
- CN
- China
- Prior art keywords
- laser
- molten iron
- lifter
- silicon content
- sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 75
- 238000001514 detection method Methods 0.000 title claims abstract description 47
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 29
- 239000010703 silicon Substances 0.000 title claims abstract description 29
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000004458 analytical method Methods 0.000 claims abstract description 11
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims description 35
- 238000001228 spectrum Methods 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 11
- 239000013307 optical fiber Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000003595 spectral effect Effects 0.000 claims description 6
- 238000000295 emission spectrum Methods 0.000 claims description 5
- 230000005284 excitation Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 230000001965 increasing effect Effects 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000004445 quantitative analysis Methods 0.000 claims description 3
- 229910001018 Cast iron Inorganic materials 0.000 claims description 2
- 230000009471 action Effects 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000000608 laser ablation Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000005457 optimization Methods 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000002536 laser-induced breakdown spectroscopy Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract 1
- 210000002381 plasma Anatomy 0.000 description 16
- 238000003723 Smelting Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010223 real-time analysis Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- 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
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Abstract
The invention provides an online rapid detection device for the silicon content of molten iron of a blast furnace, and belongs to the field of metallurgical melt component detection. The device comprises a pulse laser, a spectrometer, a photoelectric detector, a time sequence controller, a coaxial acquisition light path, molten iron on-line sampling equipment, a computer and other main components, and the molten iron silicon content is rapidly detected on line by a laser-induced breakdown spectroscopy technology. The invention can greatly shorten the analysis time of the molten iron silicon content in the iron works, increase the detection frequency of the molten iron silicon content, and realize the real-time monitoring of the molten iron silicon content, thereby being beneficial to the adjustment of the blast furnace operating parameters by the blast furnace working length in time and leading the molten iron silicon content of the blast furnace to be reduced and maintained at a lower level. The invention is beneficial to further reducing the production cost of steel enterprises, saves energy and reduces emission, and has great value for realizing the intelligent and green production of the steel enterprises.
Description
Technical Field
The invention relates to the technical field of metallurgical melt component detection, in particular to an online rapid detection device for the silicon content of molten iron of a blast furnace.
Background
The blast furnace low-silicon smelting is a new iron-making technology provided in the later 20 th century, the reduction of the silicon content of molten iron is beneficial to reducing the ton iron energy consumption and the steelmaking slag amount, and the silicon content of the molten iron is detected in the current iron-making process of iron and steel enterprises in an off-line detection mode, which comprises the following specific steps: when the blast furnace is tapping, a stokehole worker uses a sample spoon to take a molten iron sample at the outlet of the skimming tool, after the molten iron sample is solidified in air, the sample is sent to a spectrum laboratory for analysis, wherein the sample is required to be polished in advance, the spectrum laboratory uses a spark direct-reading spectrometer to perform elemental analysis on the molten iron sample, and finally a detection engineer feeds back the result to the blast furnace for growth. Typically the whole analysis process takes 20 minutes to 1 hour, and the analysis time is often affected by the work efficiency of the field staff. Therefore, the untimely detection result obtained by the conventional detection method has little significance for guiding the blast furnace to control the silicon content of the molten iron.
Under the conditions that the cost pressure of iron and steel enterprises and the national energy conservation and emission reduction demands are larger and larger, a new device capable of realizing online rapid detection of the silicon content of molten iron is urgently needed to be developed, the detection time is shortened, the iron-making efficiency is improved, and a timely and accurate detection result is provided for the low-silicon smelting operation of the blast furnace as a support.
The laser-induced breakdown spectroscopy (LIBS) technology is a technology which is developed in recent years and is used for rapidly detecting element components by utilizing laser excited plasmas and detecting plasma emission spectra, and can realize in-situ, on-line and rapid component detection of gas, liquid and solid samples, has high analysis speed, does not need sample preparation, and has great application potential in engineering analysis. However, most of the existing LIBS equipment is applied to indoor short-distance detection, the working environment of iron and steel enterprises is bad, the blast furnace tapping process is often accompanied by larger dust pollution and stronger high-temperature radiation, and the molten iron flows in a molten iron runner along with fluctuation of the liquid level, so that the LIBS technology is interfered in the field application of iron making.
Disclosure of Invention
The invention aims to solve the technical problem of providing the on-line rapid detection device for the silicon content of the molten iron of the blast furnace, which is used for realizing on-line detection of the silicon content of the molten iron flowing in a molten iron channel in the blast furnace ironmaking process, providing a timely detection result for the working length of the blast furnace, reasonably adjusting the operation parameters of the blast furnace based on the detection result and controlling the silicon content of the molten iron at a lower level.
An online quick detection device of blast furnace molten iron silicon content, its characterized in that: the device is arranged right above the molten iron runner and consists of an on-line molten iron sample acquisition system, a laser emission system, a time sequence control system, a spectrum acquisition and detection system and a coaxial acquisition light path system, wherein each system is connected with a computer. The computer is internally provided with a quantitative analysis system which comprises a spectrum background removal module, a spectrum peak identification module, a characteristic spectral line extraction module, a developed calibration model module, a silicon content calculation module and the like, so that the automatic analysis of the spectrum and the calculation of the silicon content can be realized, and the silicon content in the current molten iron can be accurately given in a short time.
Further, in order to avoid the influence of fluctuation of the molten iron water level in the molten iron runner 26, the device is independently provided with a molten iron sample online acquisition system, firstly, molten iron sample online acquisition is carried out, secondly, laser excitation plasma is carried out, then the intensity of a plasma emission spectrum is obtained through spectrum light splitting and detector detection, and finally, the plasma emission spectrum is analyzed through a pre-designed quantitative analysis program to obtain a molten iron silicon content value.
The molten iron sample on-line acquisition system consists of a sample spoon 27, a connecting rod 19, a lifter 17, a laser range finder 24, a fourth signal wire 22 and a second data wire 25, wherein the sample spoon 27 is made of cast iron or other high-temperature alloy materials, and is cylindrical, round table-shaped or prismatic in shape. The connecting rod 19 is used for connecting the lifter 17 and the sample spoon 27, the connecting rod 19 is made of high-temperature alloy with higher hardness, the connecting rod 19 is Z-shaped, one end of the connecting rod is welded on the outer wall of the sample spoon 27, the other end of the connecting rod is fixed with the lifter 17 in a mechanical mode, the lifter 17 can drive the connecting rod 19 to move up and down and rotate, and the lifter 17 is connected with the computer 21 through the fourth signal wire 22 and receives instructions of the computer 21. The laser range finder 24 is arranged at a position right above the sample spoon 27, the laser emission outlet is downward and is perpendicular to the plane of the sample spoon 27, the laser irradiates the molten iron surface to obtain the distance between the laser range finder 24 and the molten iron surface, the laser range finder 24 is connected with the lifter 17 through the second data line 25, the measured distance information is fed back to the lifter, the lifter 17 drives the connecting rod 19 and the sample spoon 27, fine adjustment is made on the position of the sample spoon 27, and the position of the molten iron liquid level is always in a set height in space during each detection.
Further, the laser emission system is composed of a laser power supply 18, a laser cavity 14, a second signal line 13 and a third signal line 20, after the position of the sample spoon 27 is adjusted, an excitation signal is sent by the computer 21 and transmitted to the laser power supply 18 through the third signal line 20, the laser power supply 18 is transmitted to the laser cavity 14 through the second signal line 13, and then a plurality of pulse lasers are sent by the laser cavity 14 and spread along the horizontal direction.
Further, the timing control system is composed of a fifth signal line 28, a first signal line 7 and a timing controller 3, wherein the fifth signal line 28 and the first signal line 7 are respectively connected with the laser power supply 18 and the photoelectric detector 2, and are used for controlling the working delay between the laser power supply 18 and the photoelectric detector 2. Each time the laser is triggered, an electrical signal is transmitted to the time schedule controller 3 through the fifth signal line 28, the time schedule controller 3 transmits an electrical signal to the photoelectric detector 2 through the first signal line 7 after a certain time delay, and the photoelectric detector 2 is triggered to detect the optical intensity.
Further, the spectrum acquisition and detection system consists of a light collector 8, an optical fiber 5, a spectrometer 1, a photoelectric detector 2 and a first data line 4; the light collector 8 is arranged right above the collecting convex lens 9, the plasma emission light is collected by the light collector 8 and coupled into the optical fiber 5, the plasma emission light is conducted into the slit inlet of the spectrometer 1 through the optical fiber 5, the spectrometer 1 splits the plasma emission light through the grating, the photoelectric detector 2 detects the intensity of the plasma emission spectrum after receiving the electric signal of the time schedule controller 3, and the detection result is transmitted to the computer 21 through the first data line 4.
Further, the coaxial acquisition optical path system consists of a laser beam expanding system, a dichroic mirror 10, a laser focusing mirror 16, an acquisition convex lens 9, an optical path protecting shell 15 and a gas nozzle 23, wherein the laser beam expanding system consists of an input concave lens 12 and an output convex lens 11; the input concave lens 12 and the output convex lens 11 are parallel to each other and perpendicular to the optical axis of the laser, and the function of the laser beam expanding system is to reduce the divergence angle of the laser and increase the diameter of the laser beam so as to facilitate better focusing during long-distance transmission; the dichroic mirror 10 has an angle of 45 degrees with the horizontal optical axis, and is used for changing the transmission direction of laser and enabling plasma emission rays to penetrate for coaxial acquisition; the laser focusing mirror 16 is installed right under the dichroic mirror 10, and functions to converge a vertical laser beam so as to concentrate energy thereof; the focus of the laser focusing lens 16 is adjusted to be below the molten iron surface in the sample spoon, the collecting convex lens 9 is arranged right above the dichroic mirror 10 and is used for converging plasma emission light rays to the light collector 8, and the light collector 8 is positioned at the focus position of the collecting convex lens 9; the optical path protecting shell 15 contains the whole coaxial acquisition optical path and has the functions of fixing optical elements, ensuring the stability of the optical path and reducing the influence of dust and high-temperature radiation on the optical elements on the metallurgical site; the optical path protecting shell 15 is F-shaped, is made of heat insulating materials, has high hardness, and has the advantages that the lower part of the optical path protecting shell 15 is close to the sample spoon, the diameter of a pipeline is reduced, and the effect of dust above the molten iron runner 26 is reduced; the gas nozzle 23 is arranged on the side wall of the lower part of the optical path protecting shell 15, the direction of the gas nozzle 23 is inclined downwards, and the gas nozzle is used for blowing gas so that dust above the molten iron channel 26 cannot enter the optical path protecting shell 15, and therefore the influence of the dust on optical elements and optical paths is reduced; the gas is air or other inert gas.
According to the invention, through reasonable light path design and system construction, the LIBS device specially oriented to the online detection of the silicon content of molten iron is designed, and the rapid and online detection of the silicon content of molten iron can be realized.
The technical scheme of the invention has the following beneficial effects:
1. compared with the traditional detection method, the device does not need to prepare samples and send the samples, has short analysis time, can realize real-time analysis, provides convenience for increasing detection frequency, provides convenience for blast furnace operators to know the current silicon content level of molten iron in time, is favorable for the blast furnace operators to adjust operation parameters in time based on the silicon content, and accordingly maintains the silicon content at a lower level and improves the quality of molten iron.
2. The invention realizes on-line automatic sampling and automatic analysis, does not need human intervention in the whole process, only needs to send a detection instruction by one key for a blast furnace worker, reduces labor cost and dangerous coefficient of operation in front of the blast furnace, and improves detection efficiency.
3. The successful application of the invention can further reduce the raw material cost in the iron making and steel making process, reduce the discharge of solid waste and harmful gas, and has great significance for further reducing the cost and enhancing the efficiency and realizing green production for iron and steel enterprises.
Drawings
FIG. 1 is a schematic diagram of an online rapid detection device for the silicon content of molten iron in a blast furnace;
the optical fiber sensor comprises a spectrometer 1, a photoelectric detector 2, a time sequence controller 3, a first data line 4, an optical fiber 5, an adiabatic housing 6, a first signal line 7, a light collector 8, a collecting convex lens 9, a dichroic mirror 10, an output convex lens 11, an input concave lens 12, a second signal line 13, a laser cavity 14, an optical path protection housing 15, a laser focusing mirror 16, an elevator 17, a laser power supply 18, a connecting rod 19, a third signal line 20, a computer 21, a fourth signal line 22, a gas nozzle 23, a laser range finder 24, a second data line 25, an iron runner 26, a sample spoon 27 and a fifth signal line 28.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The invention provides an online rapid detection device and method for the silicon content of molten iron of a blast furnace, wherein the device comprises an online molten iron sample acquisition system, a laser emission system, a time sequence control system, a spectrum acquisition and detection system, a coaxial acquisition light path and a quantitative analysis system, and is directly arranged above a molten iron runner 26.
As shown in fig. 1, a lowering command is given to the lifter 17 by the blast furnace working length through the computer 21, the lifter 17 drives the connecting rod 19 and the sample spoon 27 to vertically move downwards, so that the sample spoon 27 is completely immersed under the molten iron liquid level in the molten iron channel 26, after a few seconds of stopping, the lifter 17 automatically drives the connecting rod 19 and the sample spoon 27 to vertically move upwards to a specified position to stop, then the laser range finder 24 rapidly measures the vertical distance between the laser range finder and the molten iron liquid level and feeds back to the lifter 17, and the lifter 17 automatically drives the sample spoon 27 to finely adjust the height of the sample spoon 27, so that the molten iron liquid level in the sample spoon 27 is at the same height position at each measurement, and the position information is preset in advance, and the laser spectrum quality is highest at the position.
After the position of the sample spoon 27 is finely adjusted, the elevator 17 feeds back a position determining instruction to the computer 21, the computer 21 immediately sends an instruction for exciting laser to the laser power supply 18, the laser cavity 14 emits pulse laser along the horizontal direction, after the laser passes through the laser beam expanding system, the divergence angle is reduced, the diameter of the laser beam is increased, then the laser beam after beam expansion is reflected by the dichroic mirror 10 and changes the propagation direction to be vertically downward, and then the laser beam is converged by the laser focusing mirror 16, and the laser converging focus is positioned at a position below the molten iron liquid level. The plasma is generated under the action of laser ablation and excitation, the plasma emits light in the expansion and cooling process, the emitted light passes through the laser focusing lens 16 above to become parallel light, then the parallel light continuously penetrates through the dichroic mirror 10, the collecting convex lens 9 arranged above the dichroic mirror 10 is converged on the surface of the light collector 8, and then the collected plasma emitted light is transmitted to the entrance of the slit of the spectrometer 1 through the optical fiber 5, and the spectrometer 1 splits the collected plasma emitted light.
In addition, when the laser device excites laser light, a signal triggered by the laser device is simultaneously transmitted to the time schedule controller 3, and then the photoelectric detector 2 is triggered by accurate time delay control of the time schedule controller 3, so that after the laser device emits pulse laser light for a period of time, the photoelectric detector 2 starts to work and detects the intensity of each spectral line after being split by the spectrometer 1, and the time delay between the laser device and the photoelectric detector 2 is obtained through experimental optimization and is kept unchanged. The photodetector 2 feeds back the detected spectrum intensity value to the computer 21 through the first data line 4 and stores the spectrum intensity value. In order to reduce the influence of pulse energy stability and the like, the detected spectrum is the accumulated result of the spectrum of the multi-excitation plasma.
After the spectrum detection result is transmitted to a computer through a data line, spectrum analysis software analyzes the spectrum, and the silicon content value in the current molten iron is deduced based on the analysis. After the detection is finished, the computer 21 sends an instruction to the lifter 17, the lifter 17 drives the connecting rod 19 to rotate 90 degrees, so that the sample spoon 27 pours molten iron in the sample spoon into the molten iron channel 26, and then the lifter 17 drives the connecting rod 19 to restore to the original position, so that the next detection is prepared.
In the working state, the gas nozzle 23 arranged on the side wall of the optical path protecting shell 15 always keeps the state of blowing gas, so that dust is prevented from entering the optical path along the laser optical path outlet, and the normal use of the optical element is prevented.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (2)
1. An online quick detection device of blast furnace molten iron silicon content, its characterized in that: the device is arranged right above the molten iron runner (26) and consists of an online molten iron sample acquisition system, a laser emission system, a time sequence control system, a spectrum acquisition and detection system and a coaxial acquisition light path system, wherein each system is connected with a computer; the computer is internally provided with a quantitative analysis system which comprises a spectral background removal module, a spectral peak identification module, a characteristic spectral line extraction module, a developed calibration model and a silicon content calculation module, so that the automatic analysis of a spectrum and the calculation of the silicon content can be realized, and the silicon content in the current molten iron can be accurately given in a short time;
the molten iron sample online collection system comprises a sample spoon (27), a connecting rod (19), a lifter (17), a laser range finder (24), a second data line (25) and a fourth signal line (22);
the sample spoon (27) is cylindrical, truncated cone-shaped or prismatic, the upper surface of the sample spoon is open, the lower surface of the sample spoon is closed, and the sample spoon is made of cast iron or high-temperature-resistant ceramic materials; the connecting rod (19) is a metal rod for connecting the sample spoon (27) and the lifter (17), the material is high-temperature alloy, the connecting mode of the connecting rod (19) and the sample spoon (27) is welding, and the connecting mode of the connecting rod and the lifter is mechanical fixing; the lifter (17) can drive the connecting rod (19) to move up and down with the sample spoon (27) connected with the lifter, meanwhile, the connecting rod (19) can be driven to rotate, and signal transmission is carried out between the lifter (17) and the computer (21) through a fourth signal line (22); the laser range finder (24) is fixed right above the sample ladle, the vertical distance between the laser range finder (24) and the molten iron liquid level in the sample ladle is measured, the distance information is fed back to the lifter (17) through the second data line (25) and drives the lifter (17) to finely adjust the position of the sample ladle, so that the molten iron liquid level position is always in a set height in space during each detection;
the laser emission system consists of a laser power supply (18), a laser cavity (14), a second signal line (13) and a third signal line (20); after the position of the sample spoon (27) is adjusted, the computer (21) sends out an excitation signal to be transmitted to the laser power supply (18) through the third signal line (20), the laser power supply (18) is transmitted to the laser cavity (14) through the second signal line (13), and the laser cavity (14) immediately sends out a plurality of pulse lasers to be transmitted along the horizontal direction;
the time sequence control system consists of a time sequence controller (3), a fifth signal line (28) and a first signal line (7), wherein the time sequence controller (3) is respectively connected with a laser power supply (18) and a photoelectric detector (2) through the fifth signal line (28) and the first signal line (7) and is used for controlling the working delay between the laser power supply (18) and the photoelectric detector (2); each time the laser is triggered, an electric signal is transmitted to the time sequence controller (3) through the fifth signal line (28), the time sequence controller (3) transmits an electric signal to the photoelectric detector (2) through the first signal line (7) after a certain time delay, and the photoelectric detector (2) is triggered through the time sequence controller (3) to start detecting the spectrum intensity;
the spectrum acquisition and detection system consists of a light collector (8), an optical fiber (5), a spectrometer (1), a photoelectric detector (2) and a first data line (4); the optical collector (8) is arranged right above the collecting convex lens (9), plasma emission light is collected by the optical collector (8) and coupled into the optical fiber (5), the plasma emission light is conducted into a slit inlet of the spectrometer (1) through the optical fiber (5), the spectrometer (1) splits the plasma emission light through the grating, the photoelectric detector (2) detects the intensity of the plasma emission spectrum after receiving an electric signal of the time sequence controller (3), and the detection result is transmitted to the computer (21) through the first data line (4);
the coaxial acquisition optical path system consists of a laser beam expanding system, a dichroic mirror (10), a laser focusing mirror (16), an acquisition convex lens (9), an optical path protecting shell (15) and a gas nozzle (23); the laser beam expanding system consists of an input concave lens (12) and an output convex lens (11); the input concave lens (12) and the output convex lens (11) are parallel to each other and perpendicular to the laser optical axis, and the function of the laser beam expanding system is to reduce the divergence angle of laser and increase the diameter of laser beam so as to facilitate better focusing during long-distance transmission; the angle between the dichroic mirror (10) and the horizontal optical axis is 45 degrees, so that the laser transmission direction is changed, and meanwhile, plasma emission light can penetrate to be coaxially collected; the laser focusing mirror (16) is arranged right below the dichroic mirror (10) and is used for converging the vertical laser beams so as to concentrate the energy; the focus of the laser focusing mirror (16) is adjusted to be below the molten iron surface in the sample spoon, and the collecting convex lens (9) is arranged right above the dichroic mirror (10) and is used for converging plasma emission light rays to the light collector (8), and the light collector (8) is positioned at the focus position of the collecting convex lens (9); the optical path protection shell (15) contains the whole coaxial acquisition optical path and has the functions of fixing the optical element, ensuring the stability of the optical path and reducing the influence of dust and high-temperature radiation on the optical element on the metallurgical site; the optical path protecting shell (15) is F-shaped, is made of heat insulating materials and has high hardness, the lower part of the optical path protecting shell (15) is close to the sample spoon, and the diameter of a pipeline is reduced, so that the influence of dust above the molten iron runner (26) is reduced; the gas nozzle (23) is arranged on the side wall of the lower part of the light path protection shell (15), the direction of the gas nozzle (23) is inclined downwards, and the gas nozzle is used for blowing gas so that dust above the molten iron channel (26) cannot enter the light path protection shell (15), and therefore the influence of the dust on optical elements and light paths is reduced; the gas is air or other inert gases;
the method comprises the steps that a descending instruction is given to a lifter (17) through a computer (21), the lifter (17) drives a connecting rod (19) and a sample spoon (27) to vertically move downwards, so that the sample spoon (27) is completely immersed below the molten iron liquid level in a molten iron channel (26), the lifter (17) automatically drives the connecting rod (19) and the sample spoon (27) to vertically move upwards to a specified position to stop, then a laser range finder (24) rapidly measures the vertical distance between the specified position and the molten iron liquid level and feeds the vertical distance back to the lifter (17), the lifter (17) automatically drives the sample spoon (27) to finely adjust the height of the sample spoon (27), the molten iron liquid level in the sample spoon (27) is at the same height position during each measurement, and the position information is preset in a preset mode, and the laser spectrum quality is highest at the position;
after the position of the sample spoon (27) is finely adjusted, the elevator (17) feeds back a position determining instruction to the computer (21), the computer (21) immediately sends an instruction for exciting laser to the laser power supply (18), the laser cavity (14) emits pulse laser along the horizontal direction, after passing through the laser beam expanding system, the divergence angle of the laser is reduced, the diameter of the laser beam is increased, then the laser after beam expanding is reflected by the dichroic mirror (10) and changes the propagation direction to be vertically downward, and then the laser is converged through the laser focusing mirror (16), and the laser converging focus is below the molten iron liquid level; generating plasma under the action of laser ablation and excitation, emitting light rays in the expansion and cooling process by the plasma, enabling the emitted light rays to pass through a laser focusing lens (16) above to become parallel light rays, then continuing to penetrate through a dichroic mirror (10), converging the light rays onto the surface of a light collector (8) by a collecting convex lens (9) arranged above the dichroic mirror (10), and then transmitting the light rays to an inlet of a slit of a spectrometer (1) through an optical fiber (5), wherein the spectrometer (1) splits the collected plasma emitted light rays;
when the laser excites laser, a signal triggered by the laser is simultaneously transmitted to a time sequence controller (3), the photoelectric detector (2) is triggered by accurate time delay control of the time sequence controller (3), after the laser emits pulse laser for a period of time, the photoelectric detector (2) starts to work and detects the intensity of each spectral line after being split by the spectrometer (1), and the time delay between the laser and the photoelectric detector (2) is obtained through experimental optimization and is kept unchanged;
the photoelectric detector (2) feeds back the detected spectrum intensity value to the computer (21) through the first data line (4) and stores the spectrum intensity value;
after the spectrum detection result is transmitted to a computer (21) through a data line, analyzing the spectrum by spectrum quantitative analysis software, and calculating the silicon content value in the current molten iron;
after the detection is finished, the computer (21) sends an instruction to the lifter (17), the lifter (17) drives the connecting rod (19) to rotate by 90 degrees, so that the sample (27) pours molten iron into the molten iron channel (26), and the lifter (17) drives the connecting rod 19 to restore to the original position and prepare for the next detection.
2. The on-line rapid detection device for the silicon content of molten iron in a blast furnace according to claim 1, wherein the device is characterized in that: the whole device is externally protected by an insulating shell (6) so as to reduce the influence of site dust and high-temperature radiation, the outside of the insulating shell (6) is made of an insulating material, and the lining is made of a high-strength steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910304147.2A CN109975274B (en) | 2019-04-16 | 2019-04-16 | Online rapid detection device for silicon content of molten iron of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910304147.2A CN109975274B (en) | 2019-04-16 | 2019-04-16 | Online rapid detection device for silicon content of molten iron of blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109975274A CN109975274A (en) | 2019-07-05 |
| CN109975274B true CN109975274B (en) | 2024-01-23 |
Family
ID=67084857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910304147.2A Active CN109975274B (en) | 2019-04-16 | 2019-04-16 | Online rapid detection device for silicon content of molten iron of blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109975274B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999280B (en) * | 2020-08-18 | 2024-02-09 | 呼和浩特市环境科学研究所 | Real-time detection system for heavy metals in surface water without sampling |
| CN113092448B (en) * | 2021-03-24 | 2022-05-20 | 中南大学 | Online detection method and system for silicon content of blast furnace molten iron |
| CN113740314A (en) * | 2021-08-05 | 2021-12-03 | 合肥金星机电科技发展有限公司 | Full-automatic online detection method and system for high-temperature melt components |
| CN114235517A (en) * | 2021-11-16 | 2022-03-25 | 北京科技大学 | Method for automatically removing oxide layer of LIBS stokehole sample by nine-point surrounding |
| CN114216896A (en) * | 2021-11-18 | 2022-03-22 | 合肥正阳光电科技有限责任公司 | Laser monitoring station and laser detection method for online rapid identification of steel number plate |
| CN114226279B (en) * | 2021-12-13 | 2023-12-22 | 欧冶云商股份有限公司 | Automatic detecting and sorting device for alloy content of waste and inferior steel |
| CN114720454A (en) * | 2022-06-10 | 2022-07-08 | 合肥金星智控科技股份有限公司 | Melt component detection system, method and medium for strong flue gas dust environment |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001016582A1 (en) * | 1999-08-30 | 2001-03-08 | Euro-Celtique S.A. | In situ methods for measuring the release of a substance from a dosage form |
| KR20010047250A (en) * | 1999-11-18 | 2001-06-15 | 이구택 | Apparatus for detecting molten steel level using sub-lance |
| WO2004037157A2 (en) * | 2002-10-25 | 2004-05-06 | Guava Technologies, Inc. | Automatic analysis apparatus |
| CN201043939Y (en) * | 2007-04-29 | 2008-04-02 | 上海现代中医药技术发展有限公司 | Sampling system used for on-line spectrum analysis during Chinese medicine extraction course |
| WO2010025240A2 (en) * | 2008-09-01 | 2010-03-04 | Andrew Mark Wolters | Separation technology method and identification of error |
| RU2397471C1 (en) * | 2009-03-18 | 2010-08-20 | ООО "Нординкрафт-Сенсор" | Device for chemical analysis of molten mass and device for realising said method |
| KR20120022080A (en) * | 2010-07-29 | 2012-03-12 | 현대제철 주식회사 | Apparatus for automatically sampling a molten steel |
| CN102866081A (en) * | 2012-09-28 | 2013-01-09 | 哈尔滨理工大学 | Device and method for synchronously detecting viscosity and density of metal melt quickly |
| CN202814834U (en) * | 2012-09-28 | 2013-03-20 | 哈尔滨理工大学 | Device for synchronously rapidly detecting viscosity and density of metal bath |
| CN103969226A (en) * | 2014-05-14 | 2014-08-06 | 中国科学技术大学 | Laser-induced breakdown spectroscopy measurement system used in dusty and high-temperature environments and application |
| CN105762054A (en) * | 2016-04-07 | 2016-07-13 | 绍兴文理学院 | Vacuum extracavity controllable static gas target device and using method thereof |
| CN106459768A (en) * | 2014-05-19 | 2017-02-22 | 杰富意钢铁株式会社 | Process for producing coke, coke, and method for evaluating homogeneity of coal blend |
| CN107301328A (en) * | 2017-05-19 | 2017-10-27 | 浙江工业大学 | Cancer subtypes based on data stream clustering are precisely found and evolution analysis method |
| CN207850927U (en) * | 2018-02-26 | 2018-09-11 | 成都艾立本科技有限公司 | A kind of on-line detecting system based on laser induced breakdown spectroscopy |
| CN108535238A (en) * | 2018-03-30 | 2018-09-14 | 华中科技大学 | A kind of ore pulp detection device assisting enhancing laser microprobe using optical-fiber laser |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120303290A1 (en) * | 2011-05-27 | 2012-11-29 | Applied Filter Technology, Inc. | Realtime silicon detection system and method for the protection of machinery from siloxanes |
-
2019
- 2019-04-16 CN CN201910304147.2A patent/CN109975274B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001016582A1 (en) * | 1999-08-30 | 2001-03-08 | Euro-Celtique S.A. | In situ methods for measuring the release of a substance from a dosage form |
| KR20010047250A (en) * | 1999-11-18 | 2001-06-15 | 이구택 | Apparatus for detecting molten steel level using sub-lance |
| WO2004037157A2 (en) * | 2002-10-25 | 2004-05-06 | Guava Technologies, Inc. | Automatic analysis apparatus |
| CN201043939Y (en) * | 2007-04-29 | 2008-04-02 | 上海现代中医药技术发展有限公司 | Sampling system used for on-line spectrum analysis during Chinese medicine extraction course |
| WO2010025240A2 (en) * | 2008-09-01 | 2010-03-04 | Andrew Mark Wolters | Separation technology method and identification of error |
| RU2397471C1 (en) * | 2009-03-18 | 2010-08-20 | ООО "Нординкрафт-Сенсор" | Device for chemical analysis of molten mass and device for realising said method |
| KR20120022080A (en) * | 2010-07-29 | 2012-03-12 | 현대제철 주식회사 | Apparatus for automatically sampling a molten steel |
| CN102866081A (en) * | 2012-09-28 | 2013-01-09 | 哈尔滨理工大学 | Device and method for synchronously detecting viscosity and density of metal melt quickly |
| CN202814834U (en) * | 2012-09-28 | 2013-03-20 | 哈尔滨理工大学 | Device for synchronously rapidly detecting viscosity and density of metal bath |
| CN103969226A (en) * | 2014-05-14 | 2014-08-06 | 中国科学技术大学 | Laser-induced breakdown spectroscopy measurement system used in dusty and high-temperature environments and application |
| CN106459768A (en) * | 2014-05-19 | 2017-02-22 | 杰富意钢铁株式会社 | Process for producing coke, coke, and method for evaluating homogeneity of coal blend |
| CN105762054A (en) * | 2016-04-07 | 2016-07-13 | 绍兴文理学院 | Vacuum extracavity controllable static gas target device and using method thereof |
| CN107301328A (en) * | 2017-05-19 | 2017-10-27 | 浙江工业大学 | Cancer subtypes based on data stream clustering are precisely found and evolution analysis method |
| CN207850927U (en) * | 2018-02-26 | 2018-09-11 | 成都艾立本科技有限公司 | A kind of on-line detecting system based on laser induced breakdown spectroscopy |
| CN108535238A (en) * | 2018-03-30 | 2018-09-14 | 华中科技大学 | A kind of ore pulp detection device assisting enhancing laser microprobe using optical-fiber laser |
Non-Patent Citations (4)
| Title |
|---|
| Laser-induced breakdown spectroscopy (LIBS) – an emerging field-portable sensor technology for real-time, in-situ geochemical and environmental analysis;Russell. S. Harmon et，;《Geochemistry: Exploration, Environment, Analysis》;第5卷;第21-28页 * |
| Quantitative analysis of steel and iron by laser-induced breakdown spectroscopy using GA-KELM;MEI Yaguang et，;《Plasma Science and Technology》;第1-16页 * |
| 基于ＬＩＢＳ技术在线监测熔融铝水中的元素成分;辛勇 等，;《光子学报》;第47卷(第8期);第1-8页 * |
| 基于激光诱导击穿光谱技术的生铁中硅锰钛偏析的同步分析;梅亚光 等，;《红外与激光工程》;第47卷(第8期);第1-8页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109975274A (en) | 2019-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109975274B (en) | Online rapid detection device for silicon content of molten iron of blast furnace | |
| CN104297218B (en) | The remote original position of components of metallurgical liquid metal, on-line measuring device and method | |
| CN102313721B (en) | In-situ on-line detection device for metallurgy liquid metal component | |
| CN103175808B (en) | Laser-induced breakdown spectroscopy analysis system and laser-induced breakdown spectroscopy analysis method | |
| CN101666745B (en) | Laser induced spectrum measuring apparatus having self-adjusting calibration function and control method | |
| CN100516840C (en) | Molten steel component monitoring and analyzing equipment | |
| MX2008000982A (en) | Method for determining at least one state variable of an electric arc furnace, and electric arc furnace. | |
| CN102399933B (en) | Automatic controlling method for converter oxygen lance used for converting low-carbon steel | |
| CN102888505B (en) | Control method for detection of slab in heating furnace | |
| CN216622173U (en) | Remote measurement type laser-induced breakdown spectroscopy detection system | |
| CN102109465A (en) | Laser induced breakdown spectroscopy device for molten metal | |
| CN209927722U (en) | Online rapid detection device for silicon content of blast furnace molten iron | |
| CN201732059U (en) | In-situ on-line detection device for components of metallurgical liquid metal | |
| CN103667740B (en) | Automatic control system for copper converter converting | |
| CN201575971U (en) | Laser-induced breakdown spectroscopy device for molten metal | |
| CN203820873U (en) | Copper converter blowing control system | |
| CN201262616Y (en) | Device for monitoring and analyzing molten steel ingredient | |
| CN210923482U (en) | Flux adding control system based on ultraviolet Raman spectrum analysis | |
| CN217385221U (en) | Detection system with a plurality of test probes | |
| CN110632057A (en) | Flux addition control system and method based on ultraviolet Raman spectrum analysis | |
| CN115046988A (en) | Melt immersion probe based on LIBS technology, online detection device and detection method | |
| JPH0815153A (en) | Method and apparatus for laser emission spectroscopic analysis | |
| CN103667741A (en) | Copper converter converting control system | |
| KR20120072665A (en) | Fluorescence measurement cell improved by laser multi-reflection for on-line monitoring of process materials in high temperature molten salt | |
| CN112525888A (en) | Device and method for rapidly detecting temperature and components of vacuum induction furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |