Online rapid analysis device for LF (ladle furnace) slag

Abstract

The utility model discloses an online rapid analysis device for LF (ladle furnace) slag. The online rapid analysis device comprises a laser measurement module, a laser adjusting mechanism, a walking mechanism, a controller and a server, the walking mechanism comprises a rail car and a guide rail laid on one side of the LF furnace. The laser measuring module is installed at the driving end of the laser adjusting mechanism, the laser adjusting mechanism is installed on the rail car, and the rail car moves along the guide rail to be close to or away from an observation opening of the LF furnace. The controller enables the incident angle of the pulse laser of the laser measuring module and the slag liquid level to be kept at a constant value through the laser adjusting mechanism, and adjusts the focusing position of the laser; the controller detects the relative height of the slag liquid level through the laser measurement module and collects spectral information after slag excitation. By means of the device, manual measurement work of operators is omitted, and the slag component analysis efficiency is improved; after slag analysis and measurement are completed, the device is far away from the observation opening of the LF furnace along the guide rail, and parts are prevented from being damaged by high temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical detection, and particularly relates to an on-line rapid analysis device for LF furnace slag. Background Art

[0002] With the continuous progress of science and technology, improving the quality of steel has become one of the important goals of steel plant production. Slag is an important product in the process of steel smelting, and the chemical reactions that produce slag directly affect the quality of molten steel and the final steel products. The rapid detection and analysis of slag composition provide necessary information for metallurgical process control, and are of great significance for determining the end point of smelting, ensuring the quality of smelting products and reducing energy consumption. At present, the detection of metallurgical slag composition in most domestic steel plants is mainly completed through laboratory analysis. The main detection methods include wet chemical analysis, emission spectroscopy analysis, fluorescence spectroscopy analysis, X-ray spectroscopy analysis, etc. These spectroscopy analysis technologies have good detection limits and measurement accuracies, but they all have the problems of cumbersome and complex sample preparation, long detection cycle, inability to reflect the smelting effect of the process in real time, inability to provide on-line optimization guidance for the smelting process, and difficulty in meeting the requirements of rapid detection and analysis, which affect the progress and development of smelting technology.

[0003] Compared with traditional spectroscopy analysis technologies, Laser-Induced Breakdown Spectroscopy (LIBS) obtains the corresponding element categories by capturing a series of characteristic spectral lines generated when the analysis laser interacts with the detected substance, and combines the spectral line intensities to obtain the element contents. This technology has the advantages of simple operation, no need for sample preparation in advance, and determination of all elements, and can achieve fast analysis speed, real-time continuous detection and feedback of detection results. However, the existing detection devices are easily affected by the flue gas in the furnace, resulting in a large difference between the analysis results and the actual results, and the components of the devices are easily damaged by high temperature, resulting in high device maintenance costs. Summary of the Utility Model

[0004] The utility model aims to overcome the above-mentioned disadvantages of the existing technology, and provides an on-line rapid analysis device for LF furnace slag to solve the problems that the existing slag detection devices are easily affected by flue gas and damaged by high temperature.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] An on-line rapid analysis device for LF furnace slag, comprising a laser measurement module, a laser adjustment mechanism, a traveling mechanism, a controller and a server; the traveling mechanism includes a rail vehicle and a guide rail laid on one side of the LF furnace; the laser measurement module is installed at the driving end of the laser adjustment mechanism, the laser adjustment mechanism is installed on the rail vehicle, and the rail vehicle moves along the guide rail to approach or move away from the observation port of the LF furnace; the controller makes the incident angle of the pulsed laser of the laser measurement module keep a constant value with respect to the slag liquid surface through the laser adjustment mechanism, and adjusts the focusing position of the laser; the controller detects the relative height of the slag liquid surface through the laser measurement module and collects the spectral information after the slag is excited.

[0007] Further, the laying height of the guide rail is lower than the observation port of the LF furnace, and the guide rail is made by splicing the straight rail and the arc rail end to end.

[0008] Further, the laser adjustment mechanism includes a bracket, a lifting mechanism, a swinging mechanism, a protection and cooling component, and an electric telescopic member; the bottom of the bracket is vertically connected to the rail vehicle; the lifting mechanism is connected to the bracket, the rotating shaft of the swinging mechanism is connected to the moving part of the lifting mechanism, the electric telescopic member and the protection and cooling component are connected to the swinging end of the swinging mechanism, the laser measurement module is installed in the protection and cooling component, and the driving end of the electric telescopic member is connected to the laser measurement module.

[0009] Further, the laser measurement module includes a sliding seat, and a probe gun, a pulsed laser component, and an optical excitation collection and monitoring component are installed on the sliding seat; the electric telescopic member drives the sliding seat to move translationally.

[0010] Further, an argon purging component is arranged on the swinging mechanism, and the argon purging component includes an air pump, a hose, and a filter; the inlet of the air pump is communicated with the filter and an external air source through the hose; the outlet of the air pump extends into the bottom outlet of the probe gun through the hose.

[0011] Further, the argon purging component further includes a gas guiding cover, the outlet of the air pump is communicated with the inner cavity of the gas guiding cover through the hose; the top of the gas guiding cover is installed around the probe gun, the bottom outlet of the gas guiding cover corresponds to the bottom outlet of the probe gun, and a plurality of air outlet holes are formed around the gas guiding cover.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model provides an on-line rapid analysis device for LF furnace slag, comprising a laser measurement module, a laser adjustment mechanism, a traveling mechanism, a controller and a server; the traveling mechanism includes a rail vehicle and a guide rail laid on one side of the LF furnace; after the slag analysis and measurement are completed, the device is driven by the rail vehicle to move away from the observation port of the LF furnace, avoiding the high-temperature damage of the components, and at the same time, facilitating the maintenance operation of the device, and the rapid analysis of multiple LF furnaces can be completed by one set of analysis device.

[0014] 2. The guide rail is arranged in a form of splicing the straight rail and the arc rail end to end, which is beneficial to the flexible layout of the guide rail in complex sites.

[0015] 3. The laser adjustment mechanism includes a bracket, a lifting mechanism, a swinging mechanism, a protection and cooling component, and an electric telescopic part; the lifting mechanism is driven by a servo driver and can accurately adjust the up and down height of the laser measurement module; the swinging mechanism is driven by a servo driver and can accurately adjust the swinging angle of the laser measurement module, accurately control the focusing position of the laser, and keep the incident angle of the pulsed laser with the slag liquid surface constant. The control structure is simple, manual adjustment operation is omitted, and the efficiency and accuracy of slag component analysis are improved.

[0016] 4. An argon purging component is provided, and the argon purging component moves synchronously with the laser measurement module, and purges the local flue gas in the LF furnace through the conveyed argon, which is beneficial to keeping the laser emission and reflection channels clean. Description of the Drawings

[0017] The following further describes the present invention with reference to the drawings:

[0018] Figure 1 is the front view of the present invention;

[0019] Figure 2 is the top view of the present invention;

[0020] Figure 3 is the schematic connection structure diagram of the laser measurement module and the swinging mechanism of the present invention.

[0021] In the figure, 1. Laser measurement module; 11. Sliding seat; 12. Probe gun; 13. Pulsed laser component; 14. Optical excitation collection and monitoring component; 2. Laser adjustment mechanism; 21. Bracket; 22. Lifting mechanism; 23. Swinging mechanism; 24. Protection and cooling component; 25. Electric telescopic part; 3. Traveling mechanism; 31. Rail car; 32. Guide rail; 4. Controller; 5. Server; 6. Observation port; 71. Hose; 72. Gas source; 73. Air guide cover. Detailed Embodiments

[0022] In order to make the purpose, features, and advantages of the present invention more obvious and understandable, the technical solutions in the present invention will be clearly and completely described below with reference to the drawings in the specific embodiments of the present invention.

[0023] Such as Figure 1 - Figure 2As shown in the figure, the utility model provides an on-line rapid analysis device for LF furnace slag, which includes a laser measurement module 1, a laser adjustment mechanism 2, a traveling mechanism 3, a controller 4 and a server 5; the controller 4 is electrically connected to the laser adjustment mechanism 2, the traveling mechanism 3 and the laser measurement module 1, the controller 4 is installed near the laser adjustment mechanism 2, the server 5 is placed in the control room of the LF furnace, and the controller 4 is electrically connected to the server 5 through network equipment.

[0024] The traveling mechanism 3 includes a rail vehicle 31 and a guide rail 32 laid on one side of the LF furnace; the laser measurement module 1 is installed at the driving end of the laser adjustment mechanism 2, the laser adjustment mechanism 2 is installed on the rail vehicle 31, and the rail vehicle 31 moves along the guide rail 32 closer to or away from the observation port 6 of the LF furnace; the rail vehicle 31 includes guide wheels with flanges, and the guide wheels move along the guide rail 32, and the rail vehicle 31 is driven to move by a servo-integrated motor reducer.

[0025] The controller 4 keeps the incident angle of the pulsed laser of the laser measurement module 1 constant with the slag liquid level through the laser adjustment mechanism 2, and adjusts the focusing position of the laser; the controller 4 detects the relative height of the slag liquid level through the laser measurement module 1, and collects the spectral information after the slag is excited.

[0026] The traveling mechanism 3 drives the laser adjustment mechanism 2 and the laser measurement module 1 to move to the observation port 6 of the LF furnace, and the laser adjustment mechanism 2 adjusts the angle and distance of the laser measurement module 1 to meet the measurement requirements; after the controller 4 and the server 5 complete the rapid analysis of the slag, the traveling mechanism 3 makes the laser adjustment mechanism 2 and the laser measurement module 1 move away from the LF furnace to avoid damage to the measurement and analysis components caused by high temperature. At the same time, moving the device to one side not only facilitates the maintenance operation of the measurement and analysis device.

[0027] As Figure 1 shown, the laying height of the guide rail 32 is lower than the observation port 6 of the LF furnace, and the guide rail 32 is made by splicing the straight rail and the arc rail end to end. Specifically, the guide rail 32 near the observation port 6 of the LF furnace is a straight rail section, and the arc rail is set to facilitate flexible adjustment of the reasonable laying of the guide rail 32 to adapt to complex sites.

[0028] As Figure 2 、 Figure 3 shown, the laser adjustment mechanism 2 includes a bracket 21, a lifting mechanism 22, a swinging mechanism 23, a protection and cooling component 24, and an electric telescopic member 25; the bottom of the bracket 21 is vertically connected to the rail vehicle 31; the lifting mechanism 22 is connected to the bracket 21; as a specific implementation form, the lifting mechanism 22 adopts the form of guide rail 32 slider guidance and gear rack transmission; the rack and the guide rail 32 are connected to the bracket 21 and are driven to move up and down by a servo driver, and the up and down height of the laser measurement module 1 can be accurately adjusted.

[0029] The rotating shaft of the swing mechanism 23 is connected to the moving part of the lifting mechanism 22. The swing mechanism 23 adopts a form of central support rotating shaft, gear and gear ring meshing transmission, and relies on a servo driver to drive the swing motion, which can accurately adjust the swing angle of the laser measurement module 1.

[0030] The electric telescopic part 25 and the protection and cooling component 24 are connected to the swing end of the swing mechanism 23. The laser measurement module 1 is installed inside the protection and cooling component 24, and the driving end of the electric telescopic part 25 is connected to the laser measurement module 1.

[0031] As Figure 3 shown, the laser measurement module 1 includes a sliding seat 11, and a probe gun 12, a pulsed laser assembly 13, and an optical excitation collection and monitoring assembly 14 are installed on the sliding seat 11; the electric telescopic part 25 drives the sliding seat 11 to move translationally. Specifically, the sliding seat 11 is connected to the protection and cooling component 24 through a slider and a slide rail, and the electric telescopic part 25 pushes and pulls the sliding seat 11 to move along the slide rail, changing the distance between the laser measurement module 1 and the slag liquid level in the furnace, and accurately adjusting the focusing position of the laser; the optical excitation collection and monitoring assembly 14 is used to detect the relative height of the slag liquid level and collect the spectral information after the slag is excited. Existing laser ranging technology can be adopted, which will not be elaborated here.

[0032] As Figure 1 、 Figure 3 shown, an argon purging assembly is provided on the swing mechanism 23. The argon purging assembly includes an air pump, a hose 71, and a filter; the inlet of the air pump is communicated with the filter and an external gas source 72 through the hose 71; the outlet of the air pump extends into the bottom outlet of the probe gun 12 through the hose 71. The on-off of the hose 71 is controlled by a solenoid valve, and argon is discharged from the bottom outlet of the probe gun 12; the local flue gas in the LF furnace is purged by the conveyed argon to keep the laser emission and reflection channels clean. A filtering device is provided to ensure the cleanliness of the argon conveyed into the LF furnace and improve the measurement accuracy.

[0033] As Figure 3 shown, the argon purging assembly further includes a gas guiding cover 73, and the outlet of the air pump is communicated with the inner cavity of the gas guiding cover 73 through the hose 71; the top of the gas guiding cover 73 is installed around the probe gun 12, the bottom outlet of the gas guiding cover 73 corresponds to the bottom outlet of the probe gun 12, and a plurality of air outlet holes are provided around the gas guiding cover 73. Argon is discharged from the bottom outlet and the air outlet holes of the gas guiding cover 73, effectively purging the flue gas in the furnace and preventing the flue gas from gathering around the probe gun 12 and affecting the measurement accuracy.

[0034] Usage method of this device: First, turn on the controller 4 and the server 5; start the traveling mechanism 3 to drive the device to move to the observation port 6 of the LF furnace; then, start the laser adjustment mechanism 2, and the controller 4 controls the swing mechanism 23 to drive the laser measurement module 1 to perform tilting movement according to the instruction, and controls the lifting mechanism 22 to drive the laser measurement module 1 to perform up and down movement; at the same time, detect the relative height of the slag liquid level through the optical excitation collection monitoring component 14; the server 5 performs fine adjustment on the swing mechanism 23 and the lifting mechanism 22 according to the measured relative height value of the slag liquid level to ensure that the incident angle of the pulsed laser of the pulsed laser component 13 with the slag liquid level meets the requirements and remains a constant value;

[0035] Then, start the argon purge component to purge the local flue gas in the LF furnace with argon to keep the laser emission and reflection channels clean; then, the server 5 calculates the focusing distance of the pulsed laser component 13 according to the measured relative height of the slag liquid level, and then controls the electric telescopic member 25 to drive the sliding seat 11 to slide so that the distance between the pulsed laser component 13 and the slag liquid level reaches the optimal laser focusing position;

[0036] Finally, activate the pulsed laser component 13, and then activate the optical excitation collection monitoring component 14 to collect the spectral information after the slag is excited, and complete the rapid analysis and determination of the oxide content of elements such as manganese, silicon, calcium, magnesium, aluminum, and carbon in the slag composition.

[0037] In the description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only a relational term for facilitating the description of the present utility model. It is not necessary for the present utility model to be constructed or operated in a specific orientation, and does not specifically refer to any component or element, and should not be construed as a limitation to the present utility model.

[0038] The "connected" and "connected" in the present utility model should be understood in a broad sense. For example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] The embodiments of the present utility model are only a part of the embodiments, not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application. This specification is described according to the implementation manners. For the sake of clarity only, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation manners that can be understood by those skilled in the art.

Claims

1. An LF slag online rapid analysis device, characterized in that: The invention comprises a laser measurement module (1), a laser adjustment mechanism (2), a traveling mechanism (3), a controller (4) and a server (5); the traveling mechanism (3) comprises a rail car (31) and a guide rail (32) laid on one side of an LF furnace; the laser measurement module (1) is mounted on the driving end of the laser adjustment mechanism (2), the laser adjustment mechanism (2) is mounted on the rail car (31), and the rail car (31) moves along the guide rail (32) to approach or move away from an observation port (6) of the LF furnace; the controller (4) maintains a constant value of the incident angle between the pulse laser of the laser measurement module (1) and the slag liquid surface, and adjusts the focusing position of the laser through the laser adjustment mechanism (2); the controller (4) detects the relative height of the slag liquid surface through the laser measurement module (1), and collects spectral information after the slag is excited.

2. The LF slag online rapid analysis device according to claim 1, characterized in that: The laying height of the guide rail (32) is lower than the observation port (6) of the LF furnace, and the guide rail (32) is made by splicing a straight rail and a curved rail end to end.

3. The LF slag online rapid analysis device according to claim 1, characterized in that: The laser adjustment mechanism (2) comprises a bracket (21), a lifting mechanism (22), a swing mechanism (23), a protective cooling component (24), and an electric telescopic component (25); the bottom of the bracket (21) is vertically connected to the rail vehicle (31); the lifting mechanism (22) is connected to the bracket (21), the rotating shaft of the swing mechanism (23) is connected to the moving part of the lifting mechanism (22), the electric telescopic component (25) and the protective cooling component (24) are connected to the swing end of the swing mechanism (23), the laser measurement module (1) is installed in the protective cooling component (24), and the driving end of the electric telescopic component (25) is connected to the laser measurement module (1).

4. The LF slag online rapid analysis device according to claim 3, characterized in that: The laser measurement module (1) comprises a sliding seat (11), on which a probe gun (12), a pulse laser assembly (13), and an optical excitation collection monitoring assembly (14) are mounted; the electric telescopic member (25) drives the sliding seat (11) to move in translation.

5. The LF slag online rapid analysis device according to claim 3, characterized in that: The swing mechanism (23) is provided with an argon purge assembly, which includes an air pump, a hose (71), and a filter; the inlet of the air pump is connected to the filter and an external air source (72) through the hose (71); the outlet of the air pump extends into the bottom outlet of the probe gun (12) through the hose (71).

6. The LF slag online rapid analysis device according to claim 5, characterized in that: The argon purge assembly also includes an air guide hood (73), and the outlet of the air pump is connected to the inner cavity of the air guide hood (73) through a hose (71); the top of the air guide hood (73) is installed around the four sides of the probe gun (12), and the bottom outlet of the air guide hood (73) corresponds to the bottom outlet of the probe gun (12), and a plurality of air outlet holes are opened around the four sides of the air guide hood (73).

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