Control method for detection of slab in heating furnace

A control method and heating furnace technology, applied in heat treatment furnaces, electrical program control, program control in sequence/logic controllers, etc., can solve problems such as falling into the furnace, bumping into the discharge furnace door, and dropping of horns, etc. problems, to improve production efficiency and ensure safe operation

Active Publication Date: 2013-01-23
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0015] (4) However, according to the existing technology, in the actual process, under the long-term continuous high temperature in the discharge side area of ​​the furnace, the height of the pad iron on the fixed beam is worn, and part of the pad iron is lost, resulting in storage in the furnace. The actual height of the slab on the fixed beam of the area is lower
At this time, the operator did not find out in time, and the walking beam continued to move forw

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  • Control method for detection of slab in heating furnace
  • Control method for detection of slab in heating furnace
  • Control method for detection of slab in heating furnace

Examples

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[0058] Example 1

[0059] Implementation on Baosteel's wide and heavy plate heating furnace, the specific implementation process is as follows:

[0060] (1) During the preparation for tapping, the operator tracks the thickness information of the slab according to the production plan.

[0061] (2) Select "120mm thickness mode control" on the operation screen and enter "120MM" on the operation screen "thickness control setting", and the PLC will receive the thickness setting.

[0062] (3) Laser detector. The transmitter of the detector uses a semiconductor laser as the light source. After modulation, it emits a red laser beam. After the receiving end receives the light source, it is received by the photoelectric tube and converted into an electrical signal, which is amplified and processed by the circuit to output a red laser. control signal. At this time, the power supply and signal indicator light of the receiving end device are both green. When the slab is lifted on the moving beam ...

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Abstract

A control method for detection of a slab in a heating furnace is used for production of an ultimate slab (such as a slab with the thickness of 120mm on a heating furnace. The control method comprises the following steps: (1) tapping preparation; (2) 120mm slab thickness control setting: If so, a signal is detected by a releasing laser and Step (3) is followed; and if not, Step (5) is followed; (3) releasing laser detection to detect whether there is pulse: if so, Step (4) is followed; and if not, the next step is waited; (4) releasing laser signal maintaining; (5) whether steel tapping condition is satisfied: if so, Step (6) is followed; and if not, the next step is waited; (6) discharge machine motion; (7) whether steel tapping is finished: if so, Step (8) is followed; and if not, the step is returned to Step (6); and (8) releasing laser signal resetting. By the adoption of the control method for detection of slab in the heating furnace, laser detection section is not exceeded, safe operation of equipment is guaranteed, and production efficiency is raised. (Specification of all 120mm slabs refers to the practical heating situation of Baosteel heavy platesand concrete specifications in other similar enterprises can be adjusted and set at will according to practical production technological requirements).

Description

technical field [0001] The present invention relates to a method for controlling slabs in metallurgical heating furnaces. Specifically, the present invention relates to a method for controlling laser detectors on the discharge side used in various thick plate heating furnaces. The method is for metallurgical systems as Improvement of the laser detection method in the furnace of the walking heating furnace in the heavy plate rolling mill engineering. Background technique [0002] In the field of metallurgical heating furnaces, as the first process of the thick plate rolling mill, the thick plate heating furnace occupies a very important position. Whether it works normally or not directly affects the efficiency of the rolling mill and the quality of the slab. Relatedly, the laser detection control system on the discharge side of the thick plate heating furnace is very important in the entire production process of the heating furnace. The quality of its control directly affects...

Claims

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Application Information

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IPC IPC(8): C21D9/70G05B19/05
Inventor 王红戴儒明顾华戎戈
Owner BAOSHAN IRON & STEEL CO LTD
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