Control method of reverse belt threading in vertical continuous annealing furnace

Abstract

The invention relates to a vertical continuous annealing furnace interior reverse belt penetrating control method. The control method comprises the following steps that S1, a unit is stopped, and an annealing furnace is switched to the cooling mode; S2, the belt breaking position in the furnace is determined, whether the looping quantity of an outlet loop is enough or not is determined, and whether a reverse belt penetrating operation method is adopted or not is decided; S3, when the temperature of the furnace is decreased to the furnace cover opening temperature or below, according to the belt breaking condition in the furnace, a corresponding furnace cover is opened, steel scrap processing and rope penetrating operation are conducted, and a belt head is manufactured at the tail of a broken belt and connected with a belt penetrating rope; S4, a furnace roller needing to be subjected to linkage is selected; S5, according to the looping quantity of the outlet loop, the tension of the outlet loop is set, and belt steel in the furnace is tightened by adopting an outlet tensioning roller of the annealing furnace; S6, the outlet tensioning roller and the furnace roller are operated forreverse full linkage, and in-furnace reverse belt penetrating operation is conducted till the tail of the belt penetrates to an inlet tensioning roller of the annealing furnace; S7, all the furnace covers are closed, and the blow sweeping mode of the annealing furnace is started; and S8, the unit is started for normal production.

Description

technical field [0001] The invention relates to a control method, in particular to a method for controlling reverse belt threading in a vertical continuous annealing furnace, and belongs to the technical field of continuous annealing control. Background technique [0002] In the modern cold rolling continuous annealing unit, the annealing furnace is the main process section of the unit. During the production process, it is often affected by many factors such as the environment, equipment and human operation, which leads to production accidents in which the strip steel in the furnace breaks. If the location is in the preheating section, heating section or soaking section of the annealing furnace, our conventional treatment method is to stop the unit and cool down the annealing furnace. The cover is fully opened, and the scrap steel in the furnace is processed, and the forward rope and belt threading operations are carried out from the entrance of the unit to the furnace, and ...

AI Technical Summary

Problems solved by technology

In the above operations, it is necessary to wait for the argon arc welding to be completed before purging the furnace. The start time of the purge is relatively late, and it usually takes about 30 hours to deal with a broken belt accident.

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