Method for guaranteeing hot continuous rolling mill finish rolling outlet temperature

A technology of outlet temperature and hot tandem mill, applied in the direction of temperature control, can solve the problem of outlet temperature lag, etc., and achieve the effect of improving the efficiency of temperature regulation

Active Publication Date: 2014-08-20
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a method for ensuring the outlet temperature of the finishing rolling of the hot continuous rolling mill, which solves the deficiency of the existing control method on the outlet temperature control hysteresis

Method used

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  • Method for guaranteeing hot continuous rolling mill finish rolling outlet temperature
  • Method for guaranteeing hot continuous rolling mill finish rolling outlet temperature
  • Method for guaranteeing hot continuous rolling mill finish rolling outlet temperature

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Embodiment Construction

[0063] Such as figure 2 As shown in the diagram, the method of guaranteeing the exit temperature of the finishing rolling of this hot strip mill is based on the prediction and control of the strip full-length final rolling temperature of the section, and the temperature feedforward control is performed on the control unit with the section as the unit; the technical solution is It consists of the following three parts:

[0064] 1. Strip section

[0065] Divide the strip into logical segments of a certain length. Logic segment is the basic unit of calculation and control;

[0066] 2. Predict the final rolling temperature of each logical section according to the load distribution and speed system of the rolling stock.

[0067] First, calculate the exit speed of the rolling mill for each section of the strip length:

[0068] The segmentation principles are as follows:

[0069] The realization of this scheme is based on the calculation and control of the final rolling temperature of the fu...

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Abstract

The invention discloses a method for guaranteeing hot continuous rolling mill finish rolling outlet temperature, which comprises the following steps of: 1. dividing a rolled strip steel into a plurality of logical sections by using a certain length as unit; 2. calculating the real steel casting speed of all logical sections at the mill finish rolling outlet; 3. calculating the real temperature of the logical sections at the mill finish outlet according to the calculated real steel casting speed; and 4. calculating the needed water drainage mount of a rack cooled water when the real temperature of the logical sections at the mill finish rolling outlet is regulated at the finishing target temperature. According to the method, the volume of the cooled water in the finish rolling racks to be increased or reduced relative to a strip steel head can be calculated, set or regulated in advance through the deviation between the predicted finishing temperature of all sections and the target finishing temperature, so that the finishing temperature of the strip steel can be accurately controlled.

Description

Technical field [0001] The invention relates to a hot rolling finishing temperature control technology, in particular to a method for guaranteeing or controlling the finish rolling outlet temperature of a hot tandem rolling mill. Background technique [0002] The final rolling temperature is a very important parameter to achieve controlled rolling during the hot strip rolling production process. However, in the finishing rolling process, it is difficult to ensure the final rolling temperature accuracy if only the air cooling temperature drop is used for temperature control. Earlier hot-rolled strip temperature control methods were mainly used to control the strip cooling rate and the overall strip temperature before coiling by only predicting the final rolling temperature at the head and setting laminar cooling after the finishing mill; In order to control the phase change of the rolling process and meet the requirements of product performance and rolling output, the new developm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/74
Inventor 荣鸿伟叶红卫董晖唐世欣朱健勤郭彪
Owner BAOSHAN IRON & STEEL CO LTD
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