Device and method for measuring temperature of steel liquid below casting powder in continuous casting crystallizer
A continuous casting mold, molten steel temperature technology, applied in the configuration of indicating equipment/measuring equipment, casting equipment, manufacturing tools, etc., can solve the problem of low reliability and reproducibility of measured values, temperature measurement failure, requirement gap, etc problems, to avoid temperature drift and eliminate erosion
Inactive Publication Date: 2013-10-09
NORTHEASTERN UNIV
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Problems solved by technology
However, due to the existence of mold slag in the mold, the refractory material will be continuously eroded, the service life of the protective sleeve is limited, and the problem of continuous measurement of the molten steel temperature in the mold has always plagued the metallurgical industry.
Disposable fast miniature thermocouple probes are widely used at home and abroad to measure the temperature of molten steel in the crystallizer. However, this measurement method relies on manual insertion, which makes it difficult to ensure the consistency of the temperature measurement area, and the reliability and reliability of the measured values. The reproducibility is low; it is difficult for the operator to insert the thermocouple probe into the molten steel, resulting in temperature measurement failure or serious measurement deviation, and the existence of measurement blind section greatly increases the risk of accidents such as steel leakage and nozzle nodulation; and The temperature can only be measured within 2 to 3 seconds each time, and the data of continuous temperature changes cannot be given, which is not conducive to the realization of automatic temperature-related control of continuous casting production
Although some breakthroughs have been made in the improvement of disposable fast miniature thermocouple protection sleeves at home and abroad in recent years, the series of problems in the measurement of molten steel temperature, such as large errors, high labor intensity, high cost and poor real-time performance, have to a certain extent It has been solved, but there is still a gap with the actual production requirements, especially in the case of multi-point continuous temperature measurement.
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[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0034] Such as figure 2 As shown, a device for measuring molten steel temperature under mold slag in a continuous casting mold includes an argon gun 1 connected to an argon gas storage tank 2, an immersion cover 3 with a through hole 22 in the longitudinal direction, a temperature sensor 4, and an operating support 21. Signal processor 6 and computer 8; the dipping cover 3 is arranged on the dipping cover mounting frame 10 of the operating support 21, and the temperature sensor 4 is arranged on the temperature sensor mounting frame 11 of the operating support 21, and extends into In the through hole 22 of the dipping cover 3; the temperature sensor 4 is connected with the computer 8 through the signal processor 6, and the dipping cover 3 is made of a high temperature resistant material with oxidation resistance.
[0035] Such as F...
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Abstract
A device and method for measuring the temperature of steel liquid below casting powder in a continuous casting crystallizer belong to the technical field of continuous casting process detection. The device comprises an argon gun, a dipping cover, a temperature sensor and an operation support. The dipping cover is arranged on a dipping cover installation rack. The temperature sensor is arranged on a temperature sensor installation rack and stretches into a through hole of the dipping cover. The temperature sensor is connected with a computer through a signal processor. The dipping cover is made of a heat-resisting material with oxidation resistance. The method includes the steps that measurement point inserting positions are marked on the temperature sensor; the argon gun is opened and utilized to blow open a casting powder layer above the measurement points, the dipping cover is inserted in the opened powder hole positions, the argon gun is closed, the temperature sensor is inserted into the through hole of the dipping cover and conveyed to the marked positions, the temperature sensor is fixed and measures temperature, and the signal processor sends acquired signals to the computer. The measurement positions are a submersed nozzle outlet, a narrow face impacting zone, the two sides of a meniscus zone and a lower return flow zone of the crystallizer.
Description
technical field [0001] The invention belongs to the technical field of continuous casting process detection, and in particular relates to a temperature measuring device and method for measuring the temperature of molten steel in a mold slag in a continuous casting mold for continuous measurement, display and feedback of the molten steel temperature in the mold. Background technique [0002] In the continuous casting process, temperature is the most important operating process parameter. Appropriate molten steel temperature (different steel grades have different temperature requirements) can enable high-efficiency continuous casting to obtain high-quality slabs. The superheat of molten steel increases, the billet shell becomes thinner, the molten steel is prone to secondary oxidation, the inclusions increase, and the refractory material is severely eroded, prone to bulging, breakout, developed columnar crystals, severe central segregation, and severe shrinkage cavities. seri...
Claims
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Login to View More IPC IPC(8): B22D2/00B22D11/18
Inventor李宝宽刘中秋刘鹏李林敏齐凤升
OwnerNORTHEASTERN UNIV