Square billet rolling starting temperature acquisition and data processing method

Abstract

The invention provides a square billet rolling starting temperature acquisition and data processing method. Pyrometers are placed between a dephosphorization machine and a No. 1 rolling mill; the three pyrometers arranged in a row are used to measure the temperature of the upper, middle and lower portion of the side surface of a billet respectively; when the square billet enters the No. 1 rollingmill so as to be clamped between the upper roller and lower roller of the No. 1 rolling mill, temperature T1 collected by the pyrometers is recorded as effective starting temperature; when the difference value deltaT of temperature Tn and Tn+1 is larger than 50 DEG C, temperature collection is terminated; with Tn adopted as a reference point, the temperature of the fifth point or the tenth point behind the reference point, namely, Tn-5 or Tn-10, are recorded as effective termination temperature collected by the pyrometers; an interval from T1 to Tn-5 or T1 to Tn-10 is confirmed as a collectedtemperature valid interval; valid temperature collected by the pyrometers during the same time period is sequenced according to a large-to-small order, 60 maximum temperature values are selected, andif the number of all temperature values is smaller than 60, all the temperature values are selected, and calculation is performed according to the selected temperature values, an obtained arithmetic mean value is adopted as the final rolling starting temperature of the square billet. With the method of the invention adopted, the influence of factors such as the temperature difference of differentpositions, cooling water and water vapor can be avoided, and the accurate measurement of rolling starting temperature can be realized.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a billet rolling start temperature acquisition and data processing method. Background technique [0002] Temperature is an important parameter in the hot rolling process of rods and wires, including heating furnace temperature, rolling start temperature, finish rolling temperature, silk spinning temperature or upper cooling bed temperature. The rolling start temperature is closely related to the load of the rolling mill, the finish rolling temperature and the spinning temperature; the temperature of the heating furnace can also be reversed by the starting rolling temperature, thereby affecting the furnace operation. If the rolling start temperature is low, the furnace will heat up directly; increasing the heating furnace temperature will not only cause the billet temperature to deviate from the furnace process, but also lead to a decrease in the combustion quali...

AI Technical Summary

Problems solved by technology

[0004] 1. The external factors that interfere with the accuracy of temperature acquisition cannot be eliminated, such as the influence of the cooling water and water vapor of the 1# rolling mill on the temperature acquisition of the pyrometer cannot be avoided;

[0005] 2. The influence of the temperature difference at different positions on the side of the blank (length × height) on the temperature collection of the pyrometer cannot be eliminated; the higher the height of the blank, the greater the temperature difference at different positions;

[0006] 3. It is impossible to rule out the influence of the temperature of the head and tail of the billet and the collected abnormal temperature points (abnormal temperature caused by the surface state of the billet) on the final rolling temperature

When there are many abnormal points in the collected temperature data, the final rolling temperature will be low

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