A Method of Correcting the Influence of Continuous Casting Slab Surface Oxide Layer on Radiation Temperature Measurement
A technology of radiation temperature measurement and surface oxidation, which is applied in the field of radiation temperature measurement to achieve the effect of accurate casting surface temperature
Active Publication Date: 2021-11-16
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology
However, this technical solution does not solve the problem of how to correct the error caused by the oxide layer of the billet to the radiation temperature measurement during the continuous casting process
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Embodiment 1
[0035] The specific implementation of the present invention will be further described below by taking the formation of surface oxide layer in the high temperature continuous casting process of 45 steel and the correction of radiation temperature measurement under different oxide layer thicknesses as specific cases.
[0036] 1) Changes in the oxide layer
[0037] 1) Drill and weld thermocouples. Due to the violent oxidation of the billet in the air at high temperature, in order to prevent the thermocouple from falling off with the oxide layer, it is necessary to drill and weld the nickel-chromium-nickel-silicon thermocouple on the billet (the graduation number is K, and the cold junction temperature is 25°C).
[0038] 2) Put the steel slabs of the drilled and welded thermocouples into the heating furnace respectively, pass in nitrogen protection, set the target temperature to 800°C, and stop the nitrogen when the thermocouple temperature is displayed at 800°C. The steel billet...
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Abstract
The invention belongs to the technical field of radiation temperature measurement, and particularly relates to a method for correcting the influence of an oxide layer on the surface of a continuous casting slab on radiation temperature measurement. The thickness h of the oxide layer in the environment, constant temperature and different time conditions and the surface temperature T of the steel billet measured by the radiation thermometer 测 ; Step 2, according to the data recorded in step 1, find out the relationship between the temperature deviation ΔT and the oxide layer thickness h as: ΔT=kh+b; Step 3, according to the data recorded in step 1, calculate k and T aim The relationship between k(T aim ) and b and T aim The relationship between b(T aim ); According to the billet surface temperature T measured by the radiation thermometer 测 and the oxide layer thickness h can calculate the actual temperature of the slab; thus realizing the online accurate monitoring of the surface temperature of the slab in the high temperature continuous casting process.
Description
technical field [0001] The invention belongs to the technical field of radiation temperature measurement, in particular to a method for correcting the influence of an oxide layer on the surface of a continuous casting slab on radiation temperature measurement. Background technique [0002] Advanced continuous casting secondary cooling dynamic control is the need to ensure and improve the quality of casting slabs. The real-time monitoring of continuous casting slab surface temperature is the key link of secondary cooling dynamic control; Calculation of important parameters for the end of coagulation. At present, the real-time monitoring of the surface temperature of the continuous casting slab mainly adopts the radiation temperature measurement method. However, the complex continuous casting site environment leads to inaccurate radiation temperature measurement. The main factors affecting the radiation temperature measurement on the continuous casting site are the water mis...
Claims
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IPC IPC(8): B22D11/22
CPCB22D11/225
Inventor 倪修华郑雷谯林张发斌田建良龙木军谭锴
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD