Strip steel processing method for replacement of furnace nose of continuous annealing furnace

Abstract

A strip steel processing method for replacement of the furnace nose of a continuous annealing furnace belongs to the technical fields of galvanizing production technologies and methods, and is used for strip steel processing for the replacement of the furnace nose of the continuous annealing furnace. The method comprises the following steps: strip steel positioned in a cooling tower and a middle loop technologic section is driven to move forwards and backwards to make a segment of superfluous strip steel finally reserved in a ground area between a zinc pot and the cooling tower; the strip steel reserved on the ground between the zinc pot and the cooling tower is broken by gas cutting behind the furnace nose; the original furnace nose is hoisted to move out from the head of the broken stripsteel; a furnace nose to be used penetrates from the head of the broken strip steel, and moves in place; the furnace nose is in flange connection with a connecting and supporting device; and the broken strip steel is connected in a welding manner. The method breaks a routine technical scheme, solves the problems of adhesion of the strip steel head and the furnace nose and easily-occurring secondary steel heaping accident, which cannot be thoroughly solved for a long term, greatly shortens the replacement time of the furnace nose, and improves the replacement working efficiency of the furnacenose.

Description

technical field [0001] The invention relates to a strip steel treatment method for replacing the nose of a continuous annealing furnace during maintenance of production equipment of a continuous hot-dip galvanizing line, and belongs to the technical field of hot-dip galvanizing production technology and methods. Background technique [0002] In the process of continuous hot-dip galvanizing production, the process flow is as follows: After the cold-rolled coil strip is welded and pretreated, it enters the entrance looper to store a certain amount of strip steel; then passes through the cleaning section to clean the surface of the strip steel; then enters the vertical Heat the strip steel to the temperature required by the process in the closed continuous annealing furnace; enter the zinc pot through the connection support device and the furnace nose cavity, and the zinc liquid in the zinc pot is coated on the surface of the strip steel; and then cool the strip steel through th...

AI Technical Summary

Problems solved by technology

[0012] In this step, the welding connection of the front and rear end broken belts with the head and the fastening and installation of the bolts at the flange end of the furnace nose cannot be carried out at the same time.

[0013] To sum up, the current strip steel processing method when replacing the furnace nose has problems such as easy to cause the front-end broken strip and the lead to stick to the furnace nose, easily cause the secondary pile of steel accidents in the confined space, and prolong the replacement time of the entire maintenance furnace nose, etc. , has seriously affected the smooth progress of replacing the furnace nose of the annealing furnace, and needs to be resolved urgently

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