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Method for guaranteeing hot continuous rolling mill finish rolling outlet temperature

A technology of outlet temperature and hot continuous rolling mill, applied in the direction of temperature control, etc., can solve problems such as outlet temperature lag, and achieve the effect of improving temperature regulation efficiency

Active Publication Date: 2012-09-26
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 schematic diagram, the method for ensuring the finish rolling exit temperature of the hot continuous rolling mill is based on the prediction and control of the full-length finish rolling temperature of the strip, and carries out temperature feedforward control on the control unit with the section as the unit; its technical scheme is given by It consists of three parts:

[0064] 1. Strip steel section

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

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

[0067] First, the calculation of the exit speed of the rolling mill for each section of the strip's full length:

[0068] The segmentation principles are as follows:

[0069] The realization of this scheme is based on the calculation and control of the strip st...

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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 finish rolling temperature control technology, in particular to a method for ensuring or controlling the finish rolling exit temperature of a hot continuous rolling mill. Background technique [0002] The finish rolling temperature is a very important parameter to achieve controlled rolling in the hot strip rolling production process, but in the finish rolling process, it is difficult to ensure the finish rolling temperature accuracy if only relying on air cooling temperature drop for temperature control. The temperature control method of hot-rolled strip steel in the early days was mainly to control the cooling speed of the strip steel and the overall temperature of the strip steel before coiling by only predicting the final rolling temperature of the head and setting laminar cooling after the finishing mill; in recent years In order to control the phase change in the rolling process and meet the requirements of ...

Claims

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Application Information

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Patent Type & Authority Applications(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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