CN1113840A - Method for measuring continuous casting machine crystallizer molten steel liquid level - Google Patents
Method for measuring continuous casting machine crystallizer molten steel liquid level Download PDFInfo
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- CN1113840A CN1113840A CN 94105960 CN94105960A CN1113840A CN 1113840 A CN1113840 A CN 1113840A CN 94105960 CN94105960 CN 94105960 CN 94105960 A CN94105960 A CN 94105960A CN 1113840 A CN1113840 A CN 1113840A
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Abstract
The invention belongs to a measuring device for measuring the liquid surface height of the metallic fusants or other high temperature liquid in a ringent container. The measuring system consists of an infrared array scanning pyrometer and a scan angle determinator. The measuring device is characterized in that: the infrared array scanning pyrometer scans the liquid surface of the steel liquid and the temperature distribution of the inner side of the container; the position of the liquid surface of the steel liquid is obtained through a geometry conversion of the limit angle of the temperature mutation point obtained by scanning, according to the temperature mutation property at the contact of the liquid surface of the steel liquid and the container; and the measuring precision figure is plus or minus 1 to 4 mm.
Description
The invention belongs to the determinator of measuring the interior metal bath of open containers or other high-temp liquid liquid level position.
Whether logic approach for mold level control is stablized for causing the pass in the continuous casting production important, and will control the molten steel liquid level exactly, at first should measure the position of molten steel liquid level exactly.Present mold liquid level determinator both domestic and external (being commonly called as the liquid level meter) mainly contains: emitting isotope method, magnetic flux method, float method, image analytical method, electric-resistivity method and crystallizer cold side Temperature Distribution method etc.
[emitting isotope method] is because fears are entertained that radioactive ray leak and the management of radioactive source and the protection question when changing.The Field Force welcomes not to the utmost; Although this method measurement result is reliable and stable.
[magnetic flux method] because coil is made difficulty, and from external import price costliness, the isochrone circle body is near the molten steel liquid level, so the protection difficulty of coil case, and service life is shorter, temperature interference is bigger.
[float method] this method once came across France, its basic principle is to put a special refractories at the molten steel liquid level to make " float ", transmitted displacement information by the mechanical lever group then.But it is not high that this method is measured precision.
[imaging method] this method comes across Japan, this liquid level meter is by industrial CCT(gamma camera) at the image of certain position, certain angle picked-up crystallization liquid level, determine the molten steel liquid level position by the spatial alternation of image processing and image then.This method investment is disturbed by on-the-spot dust and smog more greatly, simultaneously.There is certain problem in the stability of its measurement result.
[electric-resistivity method] is owing to Resistance probe is the intrusion molten steel, looked into because of the difference in the probe making, the repeatability of mensuration by erosion, genus easily-consumed products, the while of molten steel liquid level and covering slag.
[cold side Temperature Distribution method] this method is to bury the Temperature Distribution of this side of thermocouple measurement underground, calculate the position of molten steel liquid level by Mathematical Modeling according to Temperature Distribution then in crystallizer water-cooled side.But this Temperature Distribution is cooled off condition effect, mensuration precision and stability and is remained to be inquired into.
Because all there is the problem of some aspect in above-mentioned the whole bag of tricks, the economic or technical difficulty when causing practical application.
The objective of the invention is in order to solve existing method existing or cost is high or the life-span is short or measurement result is unreliable or problem such as measurement result instability.Accomplish the molten steel liquid level position of measuring reliably in crystallizer and even the tundish steady in a long-term.
The present invention is made of infrared linear array scanning pyrometer, scanning angle analyzer.It is characterized in that it being the Temperature Distribution of utilizing infrared linear array scanning pyrometer, scanning molten steel liquid level and container inside thereof, utilize the temperature jump of molten steel liquid level and its container contact position.Handle to obtain the polar angle of molten steel liquid level and the temperature jump point of its container contact position by the temperature modelling, according to the polar angle of the temperature jump point that obtains position by geometry conversion acquisition molten steel liquid levels.
The characteristics of this " liquid level meter " are not contact with the molten steel liquid level.Therefore its long service life, in addition, because its measuring principle uniqueness, reliable therefore measurement result are accurately and reliably.The angle resolution of high temperature scanner in 0.1 °, it measures precision＜1-4mm.
Fig. 1 is a conticaster crystallizer molten steel liquid-level measurement system pie graph.This mensuration system has infrared linear array scanning pyrometer [1], scanning angle analyzer [2], scanning temperature, angle real-time acquisition system [3] and Temperature Distribution modelling software systems to constitute.Its principle is to utilize infrared linear array scanning pyrometer; the Temperature Distribution of scanning molten steel liquid level and container inside thereof; utilize the temperature jump of molten steel liquid level and its container contact position; handle the polar angle of the temperature jump point that obtains molten steel liquid level and its container contact position by the temperature modelling; convert by how much again and obtain the position of molten steel liquid levels, conversion method be infrared linear array scanning pyrometer infrared ray receiving port from the height (H) of molten steel liquid level equal infrared linear array scanning pyrometer infrared ray receiving port from it in opposite directions the acquisition molten steel liquid level of distance (L) and its acquisition of crystallizer medial surface and the product of the cotangent value of the polar angle (θ) of the temperature jump point of its container contact position.
The angular resolution of this system's middle infrared (Mid-IR) battle array scanning pyrometer is 0.1 ℃, and scan frequency is per second 10 times.The temperature measuring scope is 600 to 2000 ℃.The system measurement precision is 3mm.
Fig. 2 is a schematic diagram of the present invention.
Fig. 3 is the temperature-polar distribution figure of actual measurement, and abscissa is a polar angle among this figure, and ordinate is a temperature.
Fig. 4 is the temperature-polar distribution figure after the modelling, and abscissa is a polar angle among this figure, and ordinate is a temperature.
Claims (1)
1, a kind of conticaster crystallizer molten steel liquid-level measurement system, this mensuration system comprise that infrared linear array scanning pyrometer, scanning angle analyzer constitute.It is characterized in that it being the Temperature Distribution of utilizing infrared linear array scanning pyrometer scanning molten steel liquid level and container inside thereof, utilize the temperature jump of molten steel liquid level and its container contact position, obtain the polar angle of the temperature jump point of high temperature liquid level and its container contact position, according to the polar angle (θ) of the temperature jump point that obtains, by the position of how much acquisition molten steel liquid levels that convert.Conversion method be infrared linear array scanning pyrometer infrared ray receiving port from the height (H) of molten steel liquid level equal infrared linear array scanning pyrometer infrared ray receiving port from it in opposite directions the acquisition molten steel liquid level of distance (L) and its acquisition of crystallizer medial surface and the product of the cotangent value of the polar angle (θ) of the temperature jump point of its container contact position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94105960 CN1057483C (en) | 1994-06-07 | 1994-06-07 | Method for measuring continuous casting machine crystallizer molten steel liquid level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94105960 CN1057483C (en) | 1994-06-07 | 1994-06-07 | Method for measuring continuous casting machine crystallizer molten steel liquid level |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1113840A true CN1113840A (en) | 1995-12-27 |
| CN1057483C CN1057483C (en) | 2000-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94105960 Expired - Fee Related CN1057483C (en) | 1994-06-07 | 1994-06-07 | Method for measuring continuous casting machine crystallizer molten steel liquid level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1057483C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162171B (en) * | 2007-11-28 | 2010-06-09 | 重庆大学 | Method for measuring surface temperature of high-temperature casting billet within water fog medium |
| CN101920334A (en) * | 2010-08-25 | 2010-12-22 | 中南大学 | Method for detecting melt level in casting mould by adopting infrared sensor |
| CN102218512A (en) * | 2011-06-01 | 2011-10-19 | 山西太钢不锈钢股份有限公司 | Method for replacing tundish of crystallizer at high liquid level |
-
1994
- 1994-06-07 CN CN 94105960 patent/CN1057483C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162171B (en) * | 2007-11-28 | 2010-06-09 | 重庆大学 | Method for measuring surface temperature of high-temperature casting billet within water fog medium |
| CN101920334A (en) * | 2010-08-25 | 2010-12-22 | 中南大学 | Method for detecting melt level in casting mould by adopting infrared sensor |
| CN102218512A (en) * | 2011-06-01 | 2011-10-19 | 山西太钢不锈钢股份有限公司 | Method for replacing tundish of crystallizer at high liquid level |
| CN102218512B (en) * | 2011-06-01 | 2012-12-26 | 山西太钢不锈钢股份有限公司 | Method for replacing tundish of crystallizer at high liquid level |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1057483C (en) | 2000-10-18 |
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