A method for automatic cleaning and maintenance of continuous casting secondary cooling nozzle

Abstract

The invention discloses an automatic cleaning and maintenance method for a continuous casting secondary cooling nozzle, which belongs to the technical field of steelmaking-continuous casting. The cleaning process is as follows: when the system reaches the cleaning conditions, the on-site controller sends a start signal to each electromagnetic distributor, and the solenoid valves inside the electromagnetic distributor start sequentially. When the solenoid valves corresponding to a certain group of nozzles start, the compression on the upper part of the nozzles The air control line (6) enters the compressed air, the side of the compressed air control line (5) exhausts, the piston moves upward to lift the guide core, and at the same time the atomized gas is cut off, the distance between the lower part of the guide core and the spacer is pulled Open to 3mm, the water flow with pressure will wash away the impurities in an instant, and the process lasts for 2-5 seconds; after cleaning, the solenoid valve of this circuit is closed, the compressed air control pipeline (5) enters the compressed air, and the compressed air control pipeline (6) Exhaust, the piston moves down, so that the lower part of the guide core is pressed against the spacer, and the nozzle enters the normal atomization state. The advantage is that it solves the problem of serious blockage of the secondary cooling nozzle, improves the cooling effect of the slab, and at the same time, the spray characteristic parameters of the nozzle meet the process requirements.

Description

technical field [0001] The invention belongs to the technical field of steelmaking-continuous casting, and in particular provides an automatic cleaning and maintenance method for a continuous casting secondary cooling nozzle, which can automatically clean the secondary cooling nozzle on-line for continuous casting to prevent clogging. Background technique [0002] Restricted by the circulating water treatment process and conditions, the secondary cooling water required by the continuous casting machine still contains impurities such as scale, sand, mold residue, oil and soil after treatment. During the production process, these impurities will cause serious blockage of the secondary cooling nozzle of the casting machine segment or abnormal water discharge, which will affect the effect of atomization cooling and cause quality defects such as subcutaneous cracks, surface cracks, and internal cracks in the slab. Contents of the invention [0003] The purpose of the present in...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an automatic cleaning and maintenance method for the secondary cooling nozzle of continuous casting, solve the problem of serious blockage of the secondary cooling nozzle, improve the cooling effect of the slab, and at the same time, the spray characteristic parameters of the nozzle meet the process requirements

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