Small cross steel tapping control method for continous steel billet neating furnace

Abstract

The present invention discloses a small-cross tapping control method of continuous cast billet heating furnace, and is characterized by that at charging side of two heating furnaces a furnace-charging sensor, slab length detection disk and slab furnace-charging temp. detector are mounted, in the interior of the furnace a detector is mounted and at tapping hole a heat metal detector is mounted. The slab length signal, billet furnace-charging temp. signal and slab pulling speed signal are transferred into PLC and process control computer, and the computer can be used for making operation and comparison so as to obtain the optimized tapping modulus of two furnaces and can implement slab small-cross tapping control of two heating furnaces.

Description

[0001] Field [0002] The invention belongs to the production field of hot-rolled plates and strips, and in particular relates to a tapping control method for automatically controlling the small intersection of a double continuous casting billet heating furnace. Background technique [0003] Currently, two walking heating furnaces are matched with the continuous casting machine. Since the two heating furnaces are generally inconsistent regardless of the furnace charging temperature of the slab, or the finished slab specification and steel type, the two different heating furnaces The following problems will occur when billets of different specifications in the furnace are heated and tapped: [0004] 1. The production coordination is not good, and the output is affected. Because one furnace is out of steel and the other is waiting (big cross billet out of steel), the slab leading to the other furnace is heated in the furnace for too long, which greatly exceeds the specified in-f...

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Problems solved by technology

[0004] 1. The production coordination is not good, and the output is affected. Because one furnace is out of steel and the other is waiting (big cross billet out of steel), the slab leading to another furnace is heated in the furnace for too long, which greatly exceeds the specified in-furnace time, and the temperature of the steel slab at the end of the slab itself does not meet the requirements, resulting in reduced output and increased energy consumption. The number of steel blocks should not be too many, otherwise it will affect the tapping of another furnace

[0005] 2. Unstable billet temperature leads to unstable product temperature. The general rule is that the temperature of the first billet is the lowest, the temperature of the second block increases, and the temperature of the third block is the highest, and then gradually decreases. The impact is that the thickness accuracy of single furnace products is controlled. Unstable and large fluctuations. On the other hand, the temperature of the billets in the two furnaces is inconsistent, which also affects the product precision control, and the product quality fluctuates greatly.

[0006] 3. It is not easy to carry out automatic control production

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