CN109579902B - Crystallizer water gap blockage judging device and method - Google Patents
Crystallizer water gap blockage judging device and method Download PDFInfo
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- CN109579902B CN109579902B CN201811307274.XA CN201811307274A CN109579902B CN 109579902 B CN109579902 B CN 109579902B CN 201811307274 A CN201811307274 A CN 201811307274A CN 109579902 B CN109579902 B CN 109579902B
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a crystallizer nozzle blockage evaluation device and method, and belongs to the technical field of steel making. The crystallizer nozzle blockage evaluation device comprises: the device comprises a cylinder, two clamping mechanisms and a communicating vessel; the two clamping mechanisms are horizontally and oppositely arranged at the top of the barrel; a solution is arranged in the cylinder body; the communicating vessel is positioned on the outer side of the cylinder body, the first end of the communicating vessel is communicated with the bottom of the cylinder body, the height of the second section is higher than the liquid level of the solution, and scales are arranged on the communicating vessel. The crystallizer nozzle blockage evaluation device and method can accurately obtain the volume of the adhered nozzle wall nodules, and quantitative grading evaluation is carried out on the nozzle blockage degree through the nodule volume.
Description
Technical Field
The invention relates to the technical field of steelmaking, in particular to a crystallizer water gap blockage judging device and method.
Background
The submerged nozzle of the crystallizer has a crucial influence on the quality of a continuous casting billet and is a key part for converting molten steel from a liquid state to a solid state. The good crystallizer water gap can control the stable and smooth operation of the casting process, control the flow field in the crystallizer, prevent slag entrapment and promote the floating removal of impurities. However, Al is easily adhered to the inner wall of the crystallizer nozzle in the casting process2O3、Al2O3-TiOxThe flow path of the molten steel is influenced by the deoxidation products, so that the flow field of the crystallizer is disordered to causeThe crystallizer casting powder is involved in molten steel, and inclusions are not easy to float upwards and are removed, so that the quality and the performance of a product are affected, and even steel leakage is caused.
In order to effectively control and analyze the blockage of the crystallizer, part of steel enterprises take pictures of the used water gap and judge the nodule condition through photo comparison, but the judgment method cannot realize quantitative and accurate judgment.
Disclosure of Invention
The invention provides a crystallizer water gap blockage judging device and method, which solve or partially solve the technical problem that in the prior art, the quantitative and accurate judgment on the nodulation condition cannot be realized by photographing a used water gap.
In order to solve the above technical problem, the present invention provides a crystallizer nozzle blockage determination device, comprising: the device comprises a cylinder, two clamping mechanisms and a communicating vessel; the two clamping mechanisms are horizontally and oppositely arranged at the top of the barrel; a solution is arranged in the cylinder body; the communicating vessel is positioned on the outer side of the barrel, the first end of the communicating vessel is communicated with the bottom of the barrel, the height of the second end of the communicating vessel is higher than the liquid level of the solution, and the communicating vessel is provided with scales.
Further, the clamping mechanism includes: a ball screw pair and a clamping plate; the ball screw pair penetrates through the side wall of the cylinder along the radial threads of the cylinder; the output end of the ball screw pair is provided with the clamping plate, and the clamping plate is arranged in the cylinder body.
Further, the shape of the splint is semicircular.
Further, the input end of the ball screw pair is provided with a handle.
Further, the solution is simethicone; the viscosity of the simethicone is 300-1000 Cs.
Further, the communicating vessel comprises a U-shaped structure composed of a first horizontal section, a vertical section and a second horizontal section, the first horizontal section and the second horizontal section are vertically connected to two ends of the vertical section, the first horizontal section is communicated with the bottom of the barrel, the vertical section is provided with the scales, and the height of the second horizontal section is higher than the liquid level of the solution.
Further, an observation window is arranged on the cylinder body; the bottom of the barrel is provided with a base.
Based on the same inventive concept, the invention also provides a crystallizer nozzle blockage judging method, which comprises the following steps: putting an unused water gap into the cylinder until the water gap is contacted with the bottom of the cylinder; clamping the water gap through a clamping mechanism, so that the water gap and the bottom of the cylinder body are kept in a vertical state, and the solution in the cylinder body enters a communicating vessel; after the liquid level of the solution in the cylinder is stable, reading the scale of the position of the liquid level in the communicating vessel to obtain the volume of the water gap before use; the used water gap is subjected to the steps to obtain the volume of the used water gap; subtracting the volume of the water gap before use from the volume of the water gap after use to obtain the volume of the nodulation of the water gap; and judging the blockage of the water gap according to the volume of the nodule of the water gap.
Further, the water gap is placed for 4-8 hours after being used, so that the temperature of the water gap is reduced to be less than or equal to 200 ℃.
Further, the nodule mass integral of the nozzle is of 5 grades: level 1: 0-100cm3And 2 stage: 100-3And 3, level: 200-300 cm3And 4, level: 300-400cm3And 5, level: not less than 400cm3。
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the unused water gap is placed in the cylinder body until the water gap is contacted with the bottom of the cylinder body, the water gap is clamped through the clamping mechanism, the water gap and the bottom of the cylinder body are kept in a vertical state, the solution in the cylinder body enters the communicating vessel, after the liquid level of the solution in the cylinder body is stable, the scale of the position where the liquid level in the communicating vessel is located is read, the volume of the water gap before use is obtained, and the volume of the water gap after use is obtained by adopting the steps; the volume of the accretion of the water gap can be obtained by subtracting the volume of the water gap before use from the volume of the water gap after use, the blockage of the water gap is judged by the volume of the accretion of the water gap, the volume of the accretion of the adhered water gap wall can be accurately obtained, and the degree of the blockage of the water gap is quantitatively and hierarchically judged by the volume of the accretion.
Drawings
Fig. 1 is a schematic structural diagram of a crystallizer nozzle blockage judging device provided in an embodiment of the present invention.
Detailed Description
Referring to fig. 1, a crystallizer nozzle blockage judging device provided by an embodiment of the present invention includes: barrel 1, two fixture 2 and linker 3.
The two clamping mechanisms 2 are horizontally arranged at the top of the cylinder body 1 oppositely.
The solution is arranged in the cylinder body 1.
The communicating vessel 3 is positioned outside the cylinder body 1, the first end of the communicating vessel 3 is communicated with the bottom of the cylinder body, the second end of the communicating vessel 3 is higher than the liquid level of the solution, and the communicating vessel 3 is provided with scales.
According to the specific embodiment of the application, the unused water gap is placed in the cylinder body until the water gap is contacted with the bottom of the cylinder body, the water gap is clamped through the clamping mechanism, the water gap and the bottom of the cylinder body are kept in a vertical state, the solution in the cylinder body enters the communicating vessel, after the liquid level of the solution in the cylinder body is stable, the scale of the position of the liquid level in the communicating vessel is read, the volume of the water gap before use is obtained, and the volume of the water gap after use is obtained by adopting the steps; the volume of the accretion of the water gap can be obtained by subtracting the volume of the water gap before use from the volume of the water gap after use, the blockage of the water gap is judged by the volume of the accretion of the water gap, the volume of the accretion of the adhered water gap wall can be accurately obtained, and the degree of the blockage of the water gap is quantitatively and hierarchically judged by the volume of the accretion.
The structure of the chucking mechanism 2 will be described in detail.
The chucking mechanism 2 includes: a ball screw pair 2-1 and a clamping plate 2-2.
The radial thread of the cylinder 1 of the ball screw pair 2-1 penetrates through the side wall of the cylinder 1.
The output end of the ball screw pair 2-1 is provided with a clamping plate 2-2, and the clamping plate 2-2 is arranged in the cylinder 1.
The ball screw pair 2-1 rotates on the cylinder 1 to drive the clamping plate 2-2 to move forward or backward in the radial direction to clamp or loosen the water gap.
The clamping plate 2-2 is semicircular in shape, so that the water gap can be clamped conveniently.
The input end of the ball screw pair 2-1 is provided with a handle 2-3, which is convenient for operating the ball screw pair 2-1.
The structure of the cartridge 1 will be described in detail.
The solution of the cylinder body 1 is dimethyl silicone oil; the viscosity of the dimethyl silicone oil is 300-1000Cs, the dimethyl silicone oil has stable performance, is not easy to volatilize, has small viscosity-temperature coefficient, and has small influence on physicochemical parameters such as the viscosity, the volume and the like of the dimethyl silicone oil at the temperature of between 50 ℃ below zero and 200 ℃.
Wherein, the material of barrel 1 is stainless steel, improves life.
The barrel body 1 is provided with the observation window 4, so that the condition of the solution in the barrel body 1 can be observed conveniently, and meanwhile, whether the water gap is vertical to the bottom of the barrel body 1 or not can be determined conveniently. Wherein, the material of observation window 4 is organic glass.
The bottom of the cylinder body 1 is fixedly provided with a base 5. Specifically, in the present embodiment, the bottom of the cylinder 1 may be fixedly provided with the base 5 by welding, and in other embodiments, the bottom of the cylinder 1 may be fixedly provided with the base 5 by other means, such as bolts and the like. The base 5 increases the contact area of the cylinder body 1 and the ground, and ensures the stability of the cylinder body 1. Wherein, the material of barrel 1 is stainless steel, improves life.
The structure of the communicating vessel 3 will be described in detail.
The communicating vessel 3 comprises a U-shaped structure composed of a first horizontal section, a vertical section and a second horizontal section, the first horizontal section and the second horizontal section are vertically connected to two ends of the vertical section, the first horizontal section is communicated with the bottom of the barrel body, the vertical section is provided with the scales, and the second horizontal section is higher than the liquid level of the solution, so that the solution in the barrel body 1 can flow conveniently.
Based on the same inventive concept, the invention also provides a crystallizer nozzle blockage judging method, which comprises the following steps:
And 2, clamping the water gap through the clamping mechanism 2, keeping the water gap and the bottom of the cylinder body 1 in a vertical state, and enabling the solution in the cylinder body 1 to enter the communicating vessel 3.
And 3, after the liquid level of the solution in the cylinder 1 is stable, reading the scale of the position of the liquid level in the communicating vessel 3 to obtain the volume of the water gap before use.
And 4, adopting the steps for the used water gap to obtain the volume of the used water gap.
And 5, subtracting the volume before the nozzle is used from the volume after the nozzle is used, so as to obtain the volume of the nodulation of the nozzle.
And 6, judging the blockage of the water gap according to the volume of the nodule of the water gap.
Step 4 is described in detail.
The water gap is placed for 4-8 hours after being used, so that the temperature of the water gap is reduced to be less than or equal to 200 ℃, and the damage to equipment caused by the high temperature of the water gap is avoided.
Step 6 is described in detail.
The nodule mass integral for the nozzle is 5 grades: level 1: 0-100cm3And 2 stage: 100-3And 3, level: 200-300 cm3And 4, level: 300-400cm3And 5, level: not less than 400cm3And the blockage of the water gap is convenient to judge.
In order to make the embodiments of the present invention more clear, the following description is made of the methods of using the embodiments of the present invention.
Firstly, the ball screw pair 2-1 of the two clamping mechanisms 2 is operated, so that the distance between the clamping plates 2-2 of the two clamping mechanisms 2 is larger than the diameter of the water gap. The unused nozzle is then placed into the barrel 1 until the nozzle contacts the bottom of the barrel 1. The ball screw pair 2-1 of the two clamping mechanisms 2 is operated to reduce the distance between the clamping plates 2-2 of the two clamping mechanisms 2 until the water gap is clamped, the water gap is clamped by the clamping plates 2-2 of the two clamping mechanisms 2, the water gap and the bottom of the cylinder body 1 are kept in a vertical state, and the solution in the cylinder body 1 enters the communicating vessel 3.
And after the liquid level of the solution in the cylinder 1 is stable, reading the scale of the position of the liquid level in the communicating vessel 3 to obtain the volume of the water gap before use. And then operating the ball screw pair 2-1 of the two clamping mechanisms 2 to ensure that the distance between the clamping plates 2-2 of the two clamping mechanisms 2 is larger than the diameter of the water gap, and taking out the water gap before use.
When the nozzle is used, the nozzle is placed for 4-8 hours after being used, so that the temperature of the nozzle is reduced to be less than or equal to 200 ℃, and the damage of the high temperature of the nozzle to equipment is avoided. Then, the ball screw pair 2-1 of the two clamping mechanisms 2 is operated to make the distance between the clamping plates 2-2 of the two clamping mechanisms 2 larger than the diameter of the water gap. Then, the used water gap is placed in the cylinder 1 until the water gap contacts the bottom of the cylinder 1. The ball screw pair 2-1 of the two clamping mechanisms 2 is operated to reduce the distance between the clamping plates 2-2 of the two clamping mechanisms 2 until the water gap is clamped, the water gap is clamped by the clamping plates 2-2 of the two clamping mechanisms 2, the water gap and the bottom of the cylinder body 1 are kept in a vertical state, and the solution in the cylinder body 1 enters the communicating vessel 3.
And after the liquid level of the solution in the cylinder 1 is stable, reading the scale of the position of the liquid level in the communicating vessel 3 to obtain the volume of the used water gap. And then operating the ball screw pair 2-1 of the two clamping mechanisms 2 to ensure that the distance between the clamping plates 2-2 of the two clamping mechanisms 2 is larger than the diameter of the water gap, and taking out the used water gap.
And the volume of the nodulation of the water gap can be obtained by subtracting the volume before the water gap is used from the volume after the water gap is used. The blockage of the water gap is judged according to the volume of the nodule of the water gap, the volume of the nodule of the adhered water gap wall can be accurately obtained, and the degree of the water gap blockage is quantitatively judged in a grading manner according to the volume of the nodule. The nodule mass integral for the nozzle is 5 grades: level 1: 0-100cm3And 2 stage: 100-3And 3, level: 200-300 cm3And 4, level: 300-400cm3And 5, level: not less than 400cm3And the blockage of the water gap is convenient to judge.
The weight of molten steel of a steel ladle in a certain domestic steel mill is 210t, the weight of a tundish is 60t, a continuous casting machine is a double-flow plate blank, the casting section is 230 multiplied by 1600mm, the casting speed is 1.2m/min, the casting steel type is ultra-low carbon steel, the main components are shown in table 1, 9 furnaces are continuously cast in the casting process, the water gap changing operation is carried out when the casting process is carried out to the 4 th furnace, 4 water gaps are used in the double flow process, and the casting process is placed for 6 and 8 hours after the water gaps are off line, so that the temperature is reduced to be less than or.
During measurement, the cooled water gap is vertically placed into the cylinder body 1, the bottom of the cooled water gap is in contact with the bottom of the cylinder body 1, the clamping plate 2-2 is adjusted through the ball screw pair 2-1, the water gap is fixed to be kept in a vertical state, the scale of the communicating vessel 3 is read after the liquid level is stable, data are recorded, the used volume of the water gap is obtained, and the used volume of 4 water gaps is 932.4 cm, 964.3 cm, 1124.7 cm and 1325.6 cm respectively3。
The nozzle of the model is used on site for a long time, and the unused volume is 873.3 cm3The nozzle nodule volume = the volume after nozzle use-the volume before nozzle use, and the plug volumes are 59.1, 91.0, 251.4 and 452.3cm respectively3。
According to the water gap rating standard, the 4-branch horizontal blockage levels are 1 level, 3 levels and 5 levels respectively.
| Finished component C | Finished ingredient SI | Finished product ingredient MN | Finished component P | Finished product ingredient S | Finished product ingredient ALT | ALS as the finished product ingredient |
| 0.0014 | 0.01 | 0.14 | 0.012 | 0.007 | 0.029 | 0.0242 |
TABLE 1 main component/% of test steel
The weight of molten steel of a steel ladle in a certain domestic steel mill is 210t, the weight of a tundish is 60t, a continuous casting machine is a double-flow plate blank, the casting section is 230 multiplied by 1150mm, the casting speed is 1.4m/min, the casting steel type is X70 pipeline steel, the main components are shown in table 1, 9 furnaces are continuously cast in the casting time, the 4 th furnace is cast to carry out water gap changing operation, 4 water gaps are used in the double flow, and the furnace is placed for 6 and 8 hours after the water gaps are off line, so that the temperature is reduced to be less than or equal to 200 ℃.
During measurement, the cooled water gap is vertically placed into the cylinder body 1, the bottom of the cooled water gap is in contact with the bottom of the cylinder body 1, the clamping plate 2-2 is adjusted through the ball screw pair 2-1, the water gap is fixed to be kept in a vertical state, the scales of the communicating vessel 3 are read after the liquid level is stable, data are recorded, the used volume of the water gap is obtained, and the used volume of 4 water gaps is 921.4 cm, 931.9 cm, 992.3 cm and 941.2cm3。
The nozzle of the model is used on site for a long time, and the unused volume is 855.8cm3The nozzle nodule volume = the volume after nozzle use-the volume before nozzle use, and the plug volumes are 65.6, 76.1, 136.5 and 85.4cm respectively3。
According to the water gap rating standard, the 4 horizontal blockage grades are respectively 1 grade, 2 grade and 1 grade.
| Finished component C | Finished ingredient SI | Finished product ingredient MN | Finished component P | Finished product ingredient S | Finished product ingredient ALT | ALS as the finished product ingredient |
| 0.065 | 0.25 | 0.15 | 0.012 | 0.0012 | 0.032 | 0.0307 |
TABLE 2 main component/% of test steel
The method can accurately obtain the volume of the adhered nozzle wall nodule through the volume of the used nozzle and the volume of the used nozzle before use, and quantitatively and hierarchically judge the degree of nozzle blockage through the nodule volume, so that the obtained judgment result is accurate.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. A crystallizer nozzle blockage judging device is characterized by comprising: the device comprises a cylinder, two clamping mechanisms and a communicating vessel;
the two clamping mechanisms are horizontally and oppositely arranged at the top in the cylinder;
a solution is arranged in the cylinder body;
the communicating vessel is positioned on the outer side of the barrel, the first end of the communicating vessel is communicated with the bottom of the barrel, the height of the second end of the communicating vessel is higher than the liquid level of the solution, and the communicating vessel is provided with scales.
2. The crystallizer nozzle blockage assessment device according to claim 1, wherein said clamping mechanism comprises: a ball screw pair and a clamping plate;
the ball screw pair penetrates through the side wall of the cylinder along the radial threads of the cylinder;
the output end of the ball screw pair is provided with the clamping plate, and the clamping plate is arranged in the cylinder body.
3. The crystallizer nozzle clogging judging device as set forth in claim 2, wherein:
the splint is semicircular in shape.
4. The crystallizer nozzle clogging judging device as set forth in claim 2, wherein:
and a handle is arranged at the input end of the ball screw pair.
5. The crystallizer nozzle clogging judging device as set forth in claim 1, wherein:
the solution is dimethyl silicone oil;
the viscosity of the simethicone is 300-1000 Cs.
6. The crystallizer nozzle clogging judging device as set forth in claim 1, wherein:
the communicating vessel comprises a U-shaped structure consisting of a first horizontal section, a vertical section and a second horizontal section, the first horizontal section and the second horizontal section are vertically connected to two ends of the vertical section, the first horizontal section is communicated with the bottom of the barrel, the vertical section is provided with the scales, and the second horizontal section is higher than the liquid level of the solution.
7. The crystallizer nozzle clogging judging device as set forth in claim 1, wherein:
an observation window is arranged on the cylinder body;
the bottom of the barrel is provided with a base.
8. A crystallizer nozzle clogging judgment method based on the crystallizer nozzle clogging judgment device of claim 1, characterized by comprising the steps of:
putting an unused water gap into the cylinder until the water gap is contacted with the bottom of the cylinder;
clamping the water gap through a clamping mechanism, so that the water gap and the bottom of the cylinder body are kept in a vertical state, and the solution in the cylinder body enters a communicating vessel;
after the liquid level of the solution in the cylinder is stable, reading the scale of the position of the liquid level in the communicating vessel to obtain the volume of the water gap before use;
the used water gap is subjected to the steps to obtain the volume of the used water gap;
subtracting the volume of the water gap before use from the volume of the water gap after use to obtain the volume of the nodulation of the water gap;
and judging the blockage of the water gap according to the volume of the nodule of the water gap.
9. The crystallizer nozzle clogging judging method as set forth in claim 8, characterized in that:
the water gap is placed for 4-8 hours after being used, so that the temperature of the water gap is reduced to be less than or equal to 200 ℃.
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| CN111678603B (en) * | 2020-06-09 | 2022-05-20 | 首钢集团有限公司 | Detection device and method for blockage degree of submerged nozzle |
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