System and method for measuring and controlling heating temperature of edge of hot rolling slab

A technology of edge heating and temperature measurement, which is applied in temperature control, metal rolling, metal rolling, etc., can solve the problem that it is difficult to obtain timely and accurate evaluation of the commissioning effect, the real temperature rise of the intermediate billet cannot be measured, and the edge Internal heating and other issues to achieve the effect of improving control accuracy, eliminating measurement system errors, and ensuring consistency

Active Publication Date: 2013-09-11
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the real temperature rise of the intermediate blank after edge heating cannot be measured, feedback control of edge heating cannot be performed, and it is difficult to obtain timely and accurate evaluation of the application effect

Method used

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  • System and method for measuring and controlling heating temperature of edge of hot rolling slab
  • System and method for measuring and controlling heating temperature of edge of hot rolling slab

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a hot-rolled slab edge heating temperature measurement and control system includes a temperature sensor group 2, an edge heating induction head 3, a heater power supply 4, a data collector 5, a PLC 6 and an industrial control computer 7. The temperature There are two groups of sensor groups 2, two temperature sensor groups 2 are respectively arranged at the entrance and exit of the edge heating induction head 3; each temperature sensor group 2 is respectively provided with at least three temperature sensors, and the three temperature sensors are located in the middle On the same cross section of the billet 1, one of the temperature sensors is arranged at the center of the intermediate billet 1, and the other two temperature sensors are symmetrically arranged on both sides of the intermediate billet 1; the output ends of the temperature sensor group 2 pass through the data collector 5 is connected to PLC6, and the PLC controller 6 is connected ...

Embodiment 2

[0040] The following introduces a specific example of the heating of the edge of the intermediate billet. All calculation and control data are unilateral heating, and the other side is symmetrical or separately controlled.

[0041] For an intermediate blank 1 made of ordinary carbon steel with a thickness of 40mm, a length of 60m, and a running speed of 1.5m / s, the cross-section temperature measured by the temperature sensor group 2 at the entrance of the edge heating sensor head 3 is: the center temperature of the intermediate blank 1 It is 1050°C, and the temperature at 25mm from the edge is 950°C. In order to ensure the consistency of the transverse temperature of the intermediate billet 1, it is necessary to heat the edge of the intermediate billet 1 to increase the temperature at a distance of 25mm from the edge of the intermediate billet 1 by 100°C, and the transverse temperature difference ΔT of the heated intermediate billet 1 is required to be controlled by 10°C Withi...

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Abstract

The invention relates to the field of edge heating of a hot rolling slab, in particular to a system and a method for measuring and controlling the heating temperature of an edge of a hot rolling slab. The system for measuring and controlling the heating temperature of the edge of the hot rolling slab comprises a temperature sensor group, an edge heating induction head, a heater power source, a data collector, a PLC (programmable logic controller) and an industrial control computer. The method for measuring and controlling the heating temperature of the edge of the hot rolling slab comprises the steps as follows: calculating and setting heating frequency and initial work power according to a parameter of an intermediate slab of an incoming material, and setting a target control temperature difference delta T of an intermediate blank at an induction head outlet; comparing the target temperature difference with an actually-measured outlet temperature difference, and judging whether power compensation is needed; and obtaining a power compensation value in combination of induction head inlet temperature difference data, adjusting output power of the heater power source, and completing control. According to the temperature differences of the edge and the middle of the intermediate blank before and after heating, the output power is controlled in real time, and measurement errors caused by outlet and inlet environments of the edge heater are eliminated, so that the control accuracy is improved greatly, and the product quality is increased.

Description

technical field [0001] The invention relates to the field of edge heating of hot-rolled slabs, in particular to a temperature measurement and control system and method for edge heating of hot-rolled slabs. Background technique [0002] During the hot rolling process of strip steel, the temperature of the intermediate billet gradually decreases, and near the edge of the intermediate billet, since the radiation cooling on the surface is greater than that in the middle, the cooling of the edge is faster than that of the body. Generally speaking, there is an obvious temperature drop of about 50~100°C in the area from 50mm from the edge to the edge of the steel plate. In the finishing rolling process, the reduction of edge temperature will bring various problems, mainly including: 1) reducing the mechanical properties of low carbon steel and microalloyed steel; 2) increasing the rolling force of stainless steel, resulting in rolling into Scale, surface defects and edge cracks; 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/74B21B38/00
Inventor 王泽济汪卫明张永杰周永徐明红王建刚
Owner BAOSHAN IRON & STEEL CO LTD
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