CN110849931A - Visual determination device and determination method for iron ore softening and melting performance - Google Patents
Visual determination device and determination method for iron ore softening and melting performance Download PDFInfo
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- CN110849931A CN110849931A CN201911232927.7A CN201911232927A CN110849931A CN 110849931 A CN110849931 A CN 110849931A CN 201911232927 A CN201911232927 A CN 201911232927A CN 110849931 A CN110849931 A CN 110849931A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
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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
- G01N21/84—Systems specially adapted for particular applications
Abstract
The invention discloses a visual determination device and a visual determination method for iron ore reflow property, and belongs to the technical field of blast furnace smelting. The device comprises a horizontal furnace body, wherein a test furnace hearth is arranged on the inner side of the horizontal furnace body, a furnace body heating element is arranged outside the test furnace hearth, a camera is arranged on one side of the test furnace hearth, the output end of the camera is electrically connected with a computer control system, the input end of the test furnace hearth is connected with a gas supply system, and a sample is arranged in the inner cavity of the test furnace hearth. The computer control system drives the gas supply system to control the flow, the gas mixing device ensures that the reducing gas can be uniformly mixed, the gas heating device ensures that the temperature of the gas is qualified when the gas reaches the position of the sample, the camera is used for collecting the gas in real time aiming at the reflow process, the computer control system can automatically process the image, eliminate the parasitic image, calculate the area of the sample, generate the area shrinkage rate curve and the like, and the automatic integration level is higher.
Description
Technical Field
The invention relates to the technical field of blast furnace smelting, in particular to a visual determination device and a visual determination method for iron ore reflow property.
Background
After the furnace charge is added from the top of the blast furnace, in the process of descending, the furnace charge is contacted with ascending coal gas to complete the processes of heat exchange, temperature rise, reduction, reflow and the like. Through the research of blast furnace anatomy, the shape and thickness of a reflow melting zone formed by iron ore reflow have important influence on the operation of the blast furnace and the stable and smooth running of the blast furnace. For the determination of the soft melting performance of the iron ore, at present, a vertical tube furnace is mostly adopted, a pressurizing rod is arranged, normal-temperature gas is introduced, the soft melting performance of the iron ore is measured in a weight loss curve or displacement change curve mode, and a method is provided for the determination of the soft melting performance of the iron ore. However, the currently used iron ore softening and melting property measuring device has some problems, such as: 1) the introduced reducing gas is normal temperature gas which is different from the actual condition in the furnace; 2) the flow of the air supply device is adjusted to be manually controlled; 3) the reflow process of the sample is invisible or the image is blurred by adopting X-ray shooting; 4) poor mixing of the reducing gas; 5) the automation integration level is not high.
Disclosure of Invention
1. Technical problem to be solved by the invention
Aiming at the defects and shortcomings in the prior art, the invention provides a visual determination device and a determination method for iron ore reflow performance.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention discloses a visual measuring device for iron ore reflow property, which comprises a horizontal furnace body, wherein a furnace cover is arranged on one side of the horizontal furnace body, a sealed furnace cover cooling water inlet and a sealed furnace cover cooling water outlet are respectively arranged on the surface of the furnace cover, a furnace body cooling water inlet and a furnace body cooling water outlet are respectively arranged on the surface of the horizontal furnace body, a test furnace hearth is arranged on the inner side of the horizontal furnace body, a furnace body heating element is arranged outside the test furnace hearth, an image acquisition port is arranged on one side of the test furnace hearth, a camera is arranged at the port of the image acquisition port, the output end of the camera is electrically connected with a computer control system, the input end of the computer control system is also connected with a hearth temperature measuring thermocouple, and the detection end of the hearth temperature measuring;
the inner chamber of test furnace be connected with the tail gas export, test furnace's input is connected with gas supply system, gas supply system's input and computer control system electricity are connected, test furnace's inner chamber demountable installation has test platform, has placed the reducing gas flow equalizing board on test platform's the mesa, has placed the sample on the face of reducing gas flow equalizing board, the outside of sample is provided with sample temperature thermocouple.
Further, test furnace and test platform swing joint, test platform is along the inner chamber horizontal displacement of test furnace.
Furthermore, the input ends of the furnace body cooling water inlet and the sealed furnace cover cooling water inlet are respectively communicated with a cooling water pipeline.
Further, the gas supply system constitute by gas cylinder, flowmeter, gas mixing device and gas heating device, the multiunit gas cylinder is in the parallelly connected setting of input of gas mixing device, every group gas cylinder and all install the flowmeter between the gas mixing device, the output of gas mixing device is connected with gas heating device, the long section gas circuit between gas mixing device and the test furnace chamber is gas heating device, gas heating device's output extends to in the test furnace chamber.
Further, the output end of the computer control system is electrically connected with the flowmeter.
A method for measuring the iron ore softening and melting performance by a visual measuring device comprises the following steps:
the method comprises the following steps: switching on a power supply, and controlling a furnace body heating element to heat a test furnace hearth through a temperature rise control program of a computer control system;
step two: the furnace body cooling water inlet and the sealed furnace cover cooling water inlet are externally connected with cooling water pipelines and supply cooling water;
step three: sequentially stacking the sample and the reducing gas flow equalizing plate on a test platform, and pushing the test platform into a hearth of a test furnace;
step four: cooling water enters the horizontal furnace body from a furnace body cooling water inlet and is discharged out of the horizontal furnace body through a furnace body cooling water outlet to form cooling of the horizontal furnace body, the cooling water enters the furnace cover from a sealed furnace cover cooling water inlet and is discharged out of the furnace cover through a sealed furnace cover cooling water outlet to form cooling of the furnace cover, and the cooling water continuously runs in an internal circulation mode;
step five: the computer control system controls the air supply system to supply air;
step six: reducing gas is filled in the gas cylinder, the gas flows out of the gas cylinder and enters a flow meter, the opening degree of the flow meter is controlled by a computer control system, an outlet of the flow meter is connected with a gas mixing device, porous media or steel wire scraps are arranged in the gas mixing device, and the gas is mixed by the gas mixing device and then is output to a hearth of the test furnace through a gas heating device and reaches a sample position;
step seven: the camera automatically adjusts the focal length according to the temperature and the light condition of the hearth of the test furnace so as to obtain a clear image, and the acquired image is transmitted to the computer control system;
step eight: the computer control system automatically processes the acquired image, including rejecting the miscellaneous image, calculating the area of the sample and drawing the area shrinkage rate of the sample;
step nine: and after the test is finished, the computer control system respectively controls the furnace body heating element to stop heating and the gas supply system to stop supplying gas.
Further, the hearth temperature measuring thermocouple detects the real-time temperature of the hearth of the test furnace and feeds back the real-time temperature to the computer control system, and the sample temperature measuring thermocouple detects the real-time temperature of a sample and feeds back the real-time temperature to the computer control system.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention controls the flow by driving the gas supply system by the computer control system, ensures that the reducing gas can be uniformly mixed by the gas mixing device, ensures that the temperature of the gas is qualified when the gas reaches the position of a sample by the gas heating device, acquires an image by the camera capable of automatically focusing and directly transmits the image to the computer control system to realize the real-time acquisition of the reflow process, can automatically process the image by the computer control system, eliminates the miscellaneous images, calculates the area of the sample, generates an area shrinkage rate curve and the like, can determine the reflow temperature index of the iron ore according to the obtained test area shrinkage rate, and has higher automation integration level if the temperature when the area shrinkage rate is 10 percent is the softening temperature of the iron ore.
Drawings
Fig. 1 is an overall structural view of the present invention.
In the figure: 1. a horizontal furnace body; 2. a test furnace hearth; 3. an air supply system; 31. a gas cylinder; 32. a flow meter; 33. a gas mixing device; 34. a gas heating device; 4. a sample temperature thermocouple; 5. a tail gas outlet; 6. a furnace body cooling water inlet; 7. a furnace body cooling water outlet; 8. sealing a cooling water inlet of the furnace cover; 9. sealing a cooling water outlet of the furnace cover; 10. a temperature thermocouple for measuring the temperature of the hearth; 11. a sample; 12. reducing gas flow equalizing plate; 13. a furnace body heating element; 14. an image acquisition port; 15. a camera; 16. a computer control system.
Detailed Description
The invention is further described with reference to the following figures and examples:
example 1
As can be seen from fig. 1, the visual measuring device for the iron ore soft melting performance of the embodiment comprises a horizontal furnace body 1, a furnace cover is installed on one side of the horizontal furnace body 1, a sealed furnace cover cooling water inlet 8 and a sealed furnace cover cooling water outlet 9 are respectively arranged on the surface of the furnace cover, a furnace body cooling water inlet 6 and a furnace body cooling water outlet 7 are respectively arranged on the surface of the horizontal furnace body 1, the input ends of the furnace body cooling water inlet 6 and the sealed furnace cover cooling water inlet 8 are respectively communicated with a cooling water pipeline, cooling water adopts water sources with less impurities such as deionized water and soft water, is pumped into the furnace through a water pump for cooling and then returns to a cooling water pool through a water outlet, a disc-shaped cooling copper pipe is additionally arranged in the cooling water pool for cooling the cooling water, in order to avoid scale formation in the furnace during long-term use, a descaling agent can be regularly used for cleaning a furnace, a furnace body heating element 13 is arranged outside a test furnace hearth 2, the furnace body heating element 13 ensures that the highest temperature in the hearth reaches more than 1600 ℃ and ensures a certain high-temperature area width to ensure that a sample 11 is fully heated, an image acquisition port 14 is arranged on one side of the test furnace hearth 2, a camera 15 is arranged at the port of the image acquisition port 14, the output end of the camera 15 is electrically connected with a computer control system 16, the camera 15 can be selectively and detachably fixed on a rotary mechanical arm so as to adjust the position, can be folded up after the test is stopped, the cleanness of the camera 15 is ensured, meanwhile, the image acquisition port 14 is sealed by a cover cap, the camera 15 can automatically focus according to the temperature in the test furnace hearth 2, so that the definition of the acquired image is ensured, the computer control system 16 can automatically process the image, reject the miscellaneous images, calculate the area of the sample 11, generate an area shrinkage curve and, the reflow temperature index of the iron ore can be determined according to the obtained test area shrinkage rate, if the temperature when the area shrinkage rate is 10% is the softening temperature of the iron ore, the input end of the computer control system 16 is also connected with a hearth temperature thermocouple 10, and the detection end of the hearth temperature thermocouple 10 extends to the interior of the hearth 2 of the test furnace.
The computer control system 16 controls the furnace body heating element 13 to heat the test furnace hearth 2 through a furnace body heating program arranged in the computer control system, the inner cavity of the test furnace hearth 2 is connected with a tail gas outlet 5, the tail gas outlet 5 can be externally connected with an air pipe to be discharged, and can also be externally connected with a gas analyzer to carry out tail gas component detection so as to help analyze the reduction condition in the furnace and obtain a weightlessness curve and the like, the input end of the test furnace hearth 2 is connected with a gas supply system 3, the input end of the gas supply system 3 is electrically connected with the computer control system 16, a test platform is detachably arranged in the inner cavity of the test furnace hearth 2, the test furnace hearth 2 is movably connected with the test platform, the test platform is convenient to detach and replace, the test platform horizontally displaces along the inner cavity of the test furnace hearth 2, the test platform can be fed into the test furnace hearth 2 through, a sample 11 is placed on the surface of the reducing gas flow equalizing plate 12, and a sample temperature thermocouple 4 is arranged outside the sample 11.
The gas supply system 3 comprises gas cylinders 31, flow meters 32, gas mixing devices 33 and gas heating devices 34, a plurality of groups of gas cylinders 31 are arranged in parallel at the input ends of the gas mixing devices 33, the flow meters 32 are arranged between each group of gas cylinders 31 and the gas mixing devices 33, the output ends of the gas mixing devices 33 are connected with the gas heating devices 34, reducing gas is arranged in the gas cylinders 31, the gas mixing devices 33 ensure that the reducing gas can be uniformly mixed, the gas heating devices 34 ensure that the temperature of the gas reaching the position of the sample 11 is qualified, long-section gas paths between the gas mixing devices 33 and the test furnace hearth 2 are the gas heating devices 34, the output ends of the gas heating devices 34 extend into the test furnace hearth 2, and the output ends of the computer control system 16 are electrically connected with the flow meters.
The gas cylinder 31 is filled with reducing gas, which may include CO and CO according to the requirement2、N2、H2And the flow meters 32 are independent from each other and are independently controlled by the computer control system 16, the opening degree of each flow meter is controlled according to a preset flow curve, the flow of various gases is further controlled, the gas mixing device 33 is filled with porous substances, steel wire scraps or other similar substances to ensure the sufficient mixing of the gases, and the gas heating device 34 heats the reducing gas to ensure the temperature of the reducing gas reaching the sample 11.
A method for measuring the iron ore softening and melting performance by a visual measuring device comprises the following steps:
the method comprises the following steps: switching on a power supply, controlling a furnace body heating element 13 to heat a test furnace hearth 2 through a temperature rise control program of a computer control system 16, detecting the real-time temperature of the test furnace hearth 2 by a hearth temperature thermocouple 10, feeding back to the computer control system 16, detecting the real-time temperature of a sample 11 by a sample temperature thermocouple 4, and feeding back to the computer control system 16;
step two: the furnace body cooling water inlet 6 and the sealed furnace cover cooling water inlet 8 are externally connected with cooling water pipelines and supply cooling water;
step three: sequentially stacking a sample 11 and a reducing gas flow equalizing plate 12 on a test platform, and pushing the test platform into a test furnace hearth 2;
step four: cooling water enters the horizontal furnace body 1 from a furnace body cooling water inlet 6 and is discharged out of the horizontal furnace body 1 through a furnace body cooling water outlet 7 to form cooling of the horizontal furnace body 1, the cooling water enters the furnace cover from a sealed furnace cover cooling water inlet 8 and is discharged out of the furnace cover through a sealed furnace cover cooling water outlet 9 to form cooling of the furnace cover, the cooling water continuously runs in an internal circulation mode, the using amount of the cooling water is saved, and the cooling water is periodically cleaned to prevent scaling in the furnace;
step five: the computer control system 16 controls the air supply system 3 to supply air;
step six: reducing gas is filled in the gas bottle 31, the gas flows out of the gas bottle 31 and enters the flow meter 32, the opening degree of the flow meter 32 is controlled by the computer control system 16, the outlet of the flow meter 32 is connected with the gas mixing device 33, porous media or steel wire scraps are arranged in the gas mixing device 33, and the gas is mixed by the gas mixing device 33 and then is output to the hearth 2 of the test furnace through the gas heating device 34 and reaches the position of the sample 11;
step seven: the camera 15 automatically adjusts the focal length according to the temperature and light conditions of the test furnace hearth 2 so as to obtain a clear image, and the acquired image is transmitted to the computer control system 16;
step eight: the computer control system 16 automatically processes the acquired image, including removing the miscellaneous image, calculating the area of the sample 11 and drawing the area shrinkage rate of the sample 11;
step nine: after the test is finished, the computer control system 16 respectively controls the furnace body heating element 13 to stop heating and the gas supply system 3 to stop supplying gas.
The flow is controlled by driving the gas supply system 3 through the computer control system 16, the gas mixing device 33 ensures that the reducing gas can be uniformly mixed, the gas heating device 34 ensures that the temperature of the gas is qualified when the gas reaches the position of the sample 11, the image is collected through the camera 15 capable of automatically focusing and is directly transmitted to the computer control system 16 to realize the real-time collection of the reflow process, the computer control system 16 can automatically process the image, eliminate the ghost image, calculate the area of the sample 11, generate an area shrinkage rate curve and the like, namely the reflow temperature index of the iron ore can be determined according to the obtained test area shrinkage rate, and the higher automatic integration level is realized if the temperature when the area shrinkage rate is 10 percent is the softening temperature of the iron ore.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. The utility model provides a visual survey device of iron ore soft melting performance, includes horizontal furnace body (1), its characterized in that: a furnace cover is arranged on one side of the horizontal furnace body (1), a sealed furnace cover cooling water inlet (8) and a sealed furnace cover cooling water outlet (9) are respectively arranged on the surface of the furnace cover, a furnace body cooling water inlet (6) and a furnace body cooling water outlet (7) are respectively arranged on the surface of the horizontal furnace body (1), a test furnace hearth (2) is arranged on the inner side of the horizontal furnace body (1), a furnace body heating element (13) is arranged outside the test furnace hearth (2), an image acquisition port (14) is arranged on one side of the test furnace hearth (2), a camera (15) is installed at the port of the image acquisition port (14), the output end of the camera (15) is electrically connected with a computer control system (16), the input end of the computer control system (16) is also connected with a hearth temperature measuring thermocouple (10), and the detection end of the hearth temperature measuring thermocouple (10) extends into the hearth (2) of the test furnace;
the inner chamber of test furnace (2) be connected with tail gas outlet (5), the input of test furnace (2) is connected with gas supply system (3), the input and the computer control system (16) electricity of gas supply system (3) are connected, the inner chamber demountable installation of test furnace (2) has test platform, reduction gas flow equalizing plate (12) has been placed on test platform's mesa, sample (11) have been placed on the face of reduction gas flow equalizing plate (12), the outside of sample (11) is provided with sample temperature thermocouple (4).
2. The apparatus according to claim 1, wherein the apparatus comprises: the test furnace hearth (2) is movably connected with the test platform, and the test platform is horizontally displaced along the inner cavity of the test furnace hearth (2).
3. The apparatus according to claim 1, wherein the apparatus comprises: the input ends of the furnace body cooling water inlet (6) and the sealed furnace cover cooling water inlet (8) are respectively communicated with a cooling water pipeline.
4. The apparatus according to claim 1, wherein the apparatus comprises: gas supply system (3) by gas cylinder (31), flowmeter (32), mix gas device (33) and gas heating device (34) and constitute, multiunit gas cylinder (31) are in the parallelly connected setting of the input of mixing gas device (33), flowmeter (32) are all installed to every group gas cylinder (31) and between mixing gas device (33), the output of mixing gas device (33) is connected with gas heating device (34), long section gas circuit between mixing gas device (33) and test furnace chamber (2) is gas heating device (34), the output of gas heating device (34) extends to in test furnace chamber (2).
5. The apparatus according to claim 4, wherein the apparatus comprises: the output end of the computer control system (16) is electrically connected with the flowmeter (32).
6. A method for measuring the iron ore soft melting performance by a visual measuring device is characterized in that: the method comprises the following steps:
the method comprises the following steps: the power supply is switched on, and the furnace body heating element (13) is controlled to heat the test furnace hearth (2) through the temperature rise control program of the computer control system (16);
step two: a furnace body cooling water inlet (6) and a sealed furnace cover cooling water inlet (8) are externally connected with a cooling water pipeline and supply cooling water;
step three: sequentially stacking a sample (11) and a reducing gas flow equalizing plate (12) on a test platform, and pushing the test platform into a test furnace hearth (2);
step four: cooling water enters the horizontal furnace body (1) from a furnace body cooling water inlet (6) and is discharged out of the horizontal furnace body (1) through a furnace body cooling water outlet (7) to form cooling of the horizontal furnace body (1), the cooling water enters the furnace cover from a sealed furnace cover cooling water inlet (8) and is discharged out of the furnace cover through a sealed furnace cover cooling water outlet (9) to form cooling of the furnace cover, and the cooling water continuously runs in an internal circulation mode;
step five: the computer control system (16) controls the air supply system (3) to supply air;
step six: reducing gas is filled in the gas bottle (31), the gas flows out of the gas bottle (31) and enters the flow meter (32), the opening degree of the flow meter (32) is controlled by the computer control system (16), the outlet of the flow meter (32) is connected with the gas mixing device (33), porous media or steel wire scraps are filled in the gas mixing device (33), and the gas is mixed by the gas mixing device (33) and then is output into the hearth (2) of the test furnace through the gas heating device (34) and reaches the position of the sample (11);
step seven: the camera (15) automatically adjusts the focal length according to the temperature and light conditions of the test furnace hearth (2) so as to obtain a clear image, and the acquired image is transmitted to the computer control system (16);
step eight: the computer control system (16) automatically processes the acquired image, including rejecting the miscellaneous image, calculating the area of the sample (11) and drawing the area shrinkage rate of the sample (11);
step nine: and after the test is finished, the computer control system (16) respectively controls the furnace body heating element (13) to stop heating and the gas supply system (3) to stop supplying gas.
7. The method according to claim 6, wherein the method comprises the steps of: the hearth temperature thermocouple (10) detects the real-time temperature of the hearth (2) of the test furnace and feeds back the real-time temperature to the computer control system (16), and the sample temperature thermocouple (4) detects the real-time temperature of the sample (11) and feeds back the real-time temperature to the computer control system (16).
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| CN114486612A (en) * | 2021-12-31 | 2022-05-13 | 鞍钢集团北京研究院有限公司 | Device and method for measuring coke performance |
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