Zinc brushing machine for aluminum-zinc hot plating and application method thereof

Abstract

The invention relates to the field of surface treatment for the cleaning purpose, in particular to a zinc brushing machine for aluminum-zinc hot plating and an application method thereof. The zinc brushing machine for aluminum-zinc hot plating comprises a pair of tower top rollers (1); and strip steel (11) is supported by the outer surfaces of the pair of tower top rollers (1) in sequence. The zinc brushing machine is characterized by further comprising a box (2), a first lifter (31), a second lifter (32), an upper brush roller (41), a lower brush roller (42), an air spraying nozzle (5), a collecting funnel (6), a zinc discharge pipe (7), a collecting car (8) and an exhaust fan (9); a mobile end of the first lifter (31) is connected with the upper brush roller (41); and a mobile end of the second lifter (32) is connected with the lower brush roller (42). The application method for the zinc brushing machine for aluminum-zinc hot plating is characterized by comprising the steps of bonding, brushing off, spraying off, dust collection and brushing stop. The zinc brushing machine is compact in structure, convenient for use, thorough in brushing and high in adaptability.

Description

technical field [0001] The invention relates to the field of surface treatment for cleaning purposes, in particular to a zinc brushing machine for hot-dip galvanizing and a method for using the same. Background technique [0002] With the rapid development of modern industry, a large number of cold-rolled steel sheets with strong corrosion resistance are required for automobiles, home appliances, and steel structure factory buildings. It has the advantages of strong corrosion resistance, strong heat reflectivity, good processing performance and good high temperature resistance, so it is more and more widely used. [0003] The temperature of the aluminum-galvanized strip steel coming out of the zinc pot is as high as 630°C. After cooling in the cooling section, the surface temperature of the strip steel is cooled to about 300°C. Finishing, straightening, passivation and other post-processing processes. At the initial production stage of each start-up of the galvanizing unit...

AI Technical Summary

Problems solved by technology

At the initial production stage of each start-up of the galvanizing unit, because the strip steel cannot meet the process requirements in the annealing furnace and the zinc pot, the adhesion of the aluminum-zinc alloy layer plated on the surface of the strip steel is not enough. After passing through the cooling tower turning roller, it will A large area of ​​aluminum-zinc peeling occurs, and the peeled-off aluminum-zinc skin and aluminum-zinc powder will accumulate on various equipment in the production line, causing problems such as zinc sticking on the roll surface, blockage of the water quenching tank, and blockage of the filter, which not only pollutes the production line environment, and more importantly, it will cause a large number of indentation and scratch defects on the surface of the strip, resulting in quality defects

At present, the machine used for galvanizing and zinc brushing is too large, and it needs to be more than 4 meters along the length of the strip. Some galvanizing units cannot be installed between the tower top rollers because the installation space is too small; in addition, the current brushing zinc The machine has front and rear idlers, and the idlers are always in contact with the steel strip. After long-term production and operation, defects such as zinc sticking and scratches will be formed.

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