[0034] Example one:
[0035] In this embodiment, see Figure 1-Figure 4 , A method for measuring the thickness of the hearth wall of a blast furnace on-line, including the following steps:
[0036] a. Set a series of electromotive force measurement points corresponding to the blast furnace hearth hearth wall position at the blast furnace hearth setting tuyere center horizontal height position and the iron hole center horizontal height position, and each electromotive force measurement point is located at a different height layer position, and The electromotive force measurement points are respectively located on the refractory material and the furnace shell at different depths of the furnace wall, so that the electromotive force measurement points of the same layer at the same height position are installed symmetrically and evenly along the horizontal circumference of the hearth, and are placed in the blast furnace hearth. The electromotive force measuring points at the same azimuth position of the wall are equally spaced on the refractory materials and furnace shells of different depths on the same layer, thereby forming a measuring instrument distribution measurement system, which collects and outputs the electromotive force signals at the corresponding measuring points of the blast furnace hearth and furnace wall. As a real-time measurement value;
[0037] b. Set the auxiliary electromotive force measurement point, install it at a well grounded position at the bottom of the hearth, the installation vertical depth of the auxiliary electromotive force measurement point is 200-600mm, collect the electromotive force signal at the bottom of the hearth and output it as a reference value;
[0038] c. Compare, analyze and calculate the measured value of the electromotive force signal collected in step a with the reference value of the electromotive force signal collected in step b to obtain real-time measured blast furnace hearth wall thickness information. The measurement method of this embodiment avoids the impact of high-temperature liquid slag and molten iron on equipment damage when obtaining data. The installation of the measuring instrument on the refractory material and the furnace shell improves the working environment of the measuring instrument, extends its life, and significantly reduces the cost of the invention. The cost. When the measuring device is damaged, it can be replaced to avoid monitoring blind spots.
[0039] In this embodiment, see Figure 1-Figure 4 In step c, the measured values of the measurement points set in steps a and b are the electromotive force data generated during the heat transfer of the refractory material of the hearth wall of the blast furnace and the furnace shell, by drawing refractory materials and furnaces of different depths The electromotive force change trend graph of the electromotive force measurement point on the shell can obtain the real-time measured blast furnace hearth wall thickness information. The measurement method of this embodiment grasps the change in the thickness of the hearth and hearth wall in real time, and adjusts the upper and lower parts of the blast furnace and the cooling system to reduce the erosion rate of the hearth and hearth wall, which will facilitate the safe and stable operation of the hearth. The stability and longevity of the hearth.
[0040] In this embodiment, see Figure 1-Figure 4 When comparing, analyzing and calculating the measured value of the electromotive force signal collected in step a and the reference value of the electromotive force signal collected in step b, the EMF signal obtained from each measurement point is transmitted to the computer system through the data line. The system uses the data visualization system program to process, analyze and visualize the EMF signal, and process the electromotive force data at different locations; after comparing the electromotive force of each measuring instrument with the reference electromotive force, a relative electromotive force data is obtained, and then the relative electromotive force is eliminated. Noise signal steps; then according to the EMF signals at different locations, real-time display of two-dimensional or three-dimensional hearth wall thickness information. The measurement method of the present invention can continuously obtain the local thickness, two-dimensional thickness, and three-dimensional thickness information of the hearth and hearth wall online, and feedback the thickness and change information of the hearth and hearth wall in real time, so as to realize the visualization of the hearth and hearth wall thickness; and allow the blast furnace operator at any time Master the thickness information of the hearth and hearth wall, thus ending the situation of simply relying on theoretical calculations and experience to estimate the thickness of the hearth and hearth wall.
[0041] In this embodiment, see Figure 1-Figure 4 , Use the following methods to obtain real-time measured blast furnace hearth wall thickness information:
[0042] In the circuit composed of the refractory material of the furnace shell and the hearth wall, as the refractory material is corroded, the resistance of the refractory material becomes smaller and the voltage of the refractory material resistance increases. The voltage value of the refractory material resistance is changed from 1 year ago. The 0.01mv order of magnitude increased to 0.1mv order. The voltage value of refractory material gradually weakened from 0.05mv to around 0.01mv from before the tapping a year ago to the completion of tapping. After one year, the voltage of the refractory material will gradually weaken from 0.5mv to around 0.1mv before the tapping is completed within one hour. By applying the relationship data between the voltage value of the refractory material and the thickness of the refractory material obtained by the laboratory measurement, the hearth wall thickness after 1 year can be obtained.
[0043] In this embodiment, see Figure 1-Figure 4 In step a, the height position of the center of the tuyere, the height position of the center of the iron hole, and other positions that can obtain a stable electromotive force signal or need to focus on monitoring the thickness of the hearth wall are all used as the installation position of the measuring device to collect the blast furnace hearth The electromotive force signal at the corresponding position of the furnace wall. The measurement method of the present invention obtains the information of the hearth and hearth wall thickness more accurately, and grasps the change of the hearth and hearth wall thickness in real time, so as to adjust the upper and lower parts of the blast furnace and the cooling system to reduce the erosion rate of the hearth and hearth. It is beneficial to the safe and stable operation of the hearth and realizes the stability and longevity of the hearth.
[0044] In this embodiment, see Figure 1-Figure 4 , A device for measuring the thickness of the hearth wall of a blast furnace on-line, using the method of measuring the thickness of the hearth wall of a blast furnace on-line in this embodiment for online measurement, the device for measuring the thickness of the hearth wall of a blast furnace on-line includes a computer system 7 and a series of electromotive force Measuring points, the signals collected by each electromotive force measuring point are sent to the computer system 7; the electromotive force measuring points include the position of tuyere 2, the position of tapping hole 3, and other positions where a stable electromotive force signal can be obtained or the thickness of the hearth wall 5 needs to be monitored. The bottom of the tank is well grounded, and the installation vertical depth is 200-600mm. It is used as the electromotive force reference point position. A series of electromotive force measurement points are respectively set at the height of different layers of the hearth and hearth wall, so that the same layer electromotive force measurement at the same height layer position The points are installed symmetrically and evenly distributed along the horizontal circumference of the hearth, and the electromotive force measuring points at the same position are equally spaced on the refractory material 8 and the furnace shell 9 at different depths to form a measuring device distribution measurement system; at the tuyere 2 position , The position of the tap hole 3 and other positions where a stable electromotive force signal can be obtained or the hearth and hearth wall thickness needs to be monitored, respectively collect the signals at the corresponding measurement points of the hearth and hearth walls, and send the real-time measured values to the computer system 7 Output: The electromotive force measurement point at the bottom of the hearth collects the electromotive force signal at the bottom of the hearth and outputs it to the computer system 7 as a reference value; the computer system 7 sets the position of the tuyere 2 and the tap hole 3 and other stable electromotive force signals or needs to be monitored The measured value of the electromotive force signal collected at the position of the hearth and hearth wall thickness and the reference value of the electromotive force signal collected at the electromotive force measurement point at the bottom of the hearth are calculated, analyzed and data processed to obtain real-time measured hearth and hearth thickness change information.
[0045] In this embodiment, see Figure 1-Figure 4 , The induction end of the electromotive force measurement point is set on the refractory material and the furnace shell of different depths on the hearth furnace wall 5, and the electromotive force measurement points at the same height layer are distributed at equal intervals; the electromotive force signal collected by the electromotive force measurement point at the bottom of the hearth is used as Reference values for other electromotive force measurement points. There are 4, 8, or 16 measuring points in the same circumferential direction at the same height.
[0046] In this embodiment, see Figure 1-Figure 4 , The electromotive force measuring point is the measuring device, including the furnace wall electromotive force measuring device installed at the tuyere 2 position 1, the furnace wall electromotive force measuring device installed at the iron port 3 position, and the refractory installed on the hearth furnace wall Auxiliary electromotive force measurer 8, furnace shell electromotive force measurer 9 and hearth bottom electromotive force measurer 6 installed on the furnace shell at other positions of the material layer; the computer system 7 is a data visualization system, using analysis programs to obtain real-time measurement The thickness change information of the hearth and furnace wall; each measuring device is composed of a circuit and a high-sensitivity electromotive force measuring probe that can measure the depth of the corresponding furnace wall; the furnace wall electromotive force measurement device at the tuyere 1, the furnace wall electromotive force measurement device at the iron port 4. The furnace The wall auxiliary electromotive force measurer 8 and the furnace shell electromotive force measurer 9 respectively adopt multi-head electromotive force measurers, which are used for the symmetrical measurement of the multi-point electromotive force information with the measuring points symmetrically distributed along the circumference of the furnace wall on the hearth cross section; The bottom electromotive force measurer 6 adopts a single-head electromotive force measurer, which is used for the measurement of the reference electromotive force at the bottom of the hearth; the junction box 10 of the internal detection end of each multi-head electromotive force measurer is connected with the signal end of the computer system 7. The rear end of the internal detection end is connected to the front end of the lead-out fuse 13, and a plurality of measuring probe wires 12 respectively extend from the rear end or side wall of the lead-out fuse 13, as the signal wiring harness connector of the signal output end, each measuring probe The wire 12 is also wrapped with an insulating sleeve 11, so that the measuring probe wire 12 has a double-layer protection structure of the insulating sleeve 11 and the lead-out fuse 13; the junction box 10 and the computer system 7 of the internal detection end of the single-head electromotive force measurer The back end of the internal detection end of the single-head EMF is connected to the front end of the lead-out fuse 13, and the measuring probe wire 12 extends from the rear end of the lead-out fuse 13, as the signal line connector of the signal output end The measuring probe wire 12 is also wrapped with an insulating sleeve 11, so that the measuring probe wire 12 has a double-layer protection structure of the insulating sleeve 11 and the lead-out fuse sleeve 13. In this embodiment, according to the specific setting of the thickness of the refractory material of the hearth and hearth wall, a series of electromotive force measuring devices are installed on the refractory material and the furnace shell with different depths at the same position on the hearth and hearth wall. In addition, another measuring instrument is installed at the carbon brick position at the bottom of the hearth and used as a reference value and benchmark. When installing other measuring instruments, the installation position of the measuring instruments shall be symmetrically and evenly installed along the circumference of the hearth. The measuring instruments in the same position shall be installed on refractory materials and furnace shells of different depths. The electromotive force measuring device of this embodiment is installed on the refractory material of the hearth and the furnace shell, and its installation positions include 4, 8 or 16 positions of the tuyere horizontal line, 4, 8 or 16 positions of the iron hole horizontal line, and in addition There is 1 carbon brick at the bottom of the hearth, and it is also installed at a location where a stable electromotive force signal is obtained or the thickness of the hearth and hearth wall needs to be monitored. The electromotive force measuring device at the same installation position contains 3 electromotive force measuring points of different depths, which are installed in refractory materials of different depths. 4, 8 or 16 installation positions are evenly distributed on the circumference of the hearth; one installation position is set at the tap hole, and the vertical height direction is another installation position. The measurement data of the measuring instrument installed at the carbon brick position at the bottom of the hearth is used as the reference value, and the reference voltage is 10 -5 V. The EMF signal obtained from each measurement point is transmitted to the computer through the data line, and the computer uses the developed program to process, analyze and visualize the EMF signal. Process the electromotive force data of different depths, for example, after subtracting the reference electromotive force reference value from the electromotive force of each measuring instrument, a relative electromotive force is obtained, and then the noise signal in the relative electromotive force is eliminated; finally, the two-dimensional real-time display according to the EMF signal of different positions Or three-dimensional hearth furnace wall thickness. The measuring method and measuring device of this embodiment can flexibly change the installation position of the measuring device, and can strengthen the monitoring of the hearth wall thickness in key areas.
[0047] In this embodiment, see Figure 1-Figure 4 , The computer system 7 collects, processes and analyzes the electromotive force signals collected at each tuyere 2, tap hole 3 and other positions of the refractory material layer of the hearth and hearth wall, and will obtain the thickness information of the hearth and hearth wall 5, and draw The electromotive force change trend graph. When the thickness of the hearth and furnace wall 5 changes, the measuring devices installed at the positions of the tuyere 2 and the tap hole 3 will detect the change of the electromotive force caused by the change in energy. In the normal working state, the thickness information output by each tuyere 2 and tapping hole 3 is recorded, and analyzed and data processed by the computer system 7 to obtain the basis for judging abnormal hearth wall thickness changes.
[0048] In this embodiment, the method and device for online measurement of the thickness of the hearth wall of a blast furnace. Taking the electromotive force signal at the measuring point in the hearth furnace wall as a parameter, the computer processes and analyzes the electromotive force data at the different tuyere and tap hole to obtain information related to the thickness of the refractory material. The measurement is based on the difference in the energy stored in the liquid slag and iron. The energy transfers from the inside of the hearth to the furnace wall through the refractory material, and there is a change rule. The measured value is the electromotive force generated during the energy transfer process from the refractory material of the blast furnace hearth and the furnace shell. . The blast furnace hearth wall thickness measurement device is composed of computer data visualization system, data transmission line and electromotive force measuring device; the inside of the electromotive force measuring device is composed of lines and multiple high-sensitivity measuring probes of different depths; the first is the electromotive force signal in the measurement process Obtained by the probe, connected to the computer through the data transmission line, and then through the developed analysis program, the electromotive force of each measuring point can be directly analyzed and calculated. The measuring method and device of the present invention monitor the change of the hearth wall thickness in real time and guide the blast furnace to adjust the upper and lower parts and the cooling system in time, which will help monitor and realize the stability and longevity of the hearth from the daily operation.
