Control method for detection of slab in heating furnace

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 a slab in a metallurgical heating furnace. In particular, the present invention relates to a method for controlling a laser detector on the discharge side used in various thick plate heating furnaces. The method is for the metallurgical system. The improvement of the laser detection method in the walking heating furnace of the heavy plate rolling mill project. 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. Its normal operation 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 heating furnace production process. The quality of its control directly affects the normal tapping production rhy...

AI Technical Summary

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 forward in the automatic mode, and the slab in the furnace would be "transported" to the outside of the furnace and hit the discharge furnace door or fall into the furnace. often lead to serious consequences

[0016] Due to the continuous production of the furnace, under normal circumstances, there are only 1-2 furnace repair arrangements within a year. When the above problems are encountered, due to the high temperature in the furnace, it cannot be repaired in time

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