A non-contact pneumatic broom type hot-dip galvanizing system for strip steel

Abstract

The invention discloses a non-contact pneumatic-broom-type strip steel hot-dip galvanizing system. Strip steel is reeled in by two inlet stabilizing rollers, and enters an insulation shield through ahorizontal narrow slit in the inlet side of the insulation shield; then the strip steel sequentially passes through rectangular strip steel via holes in galvanizing pipes of a galvanizing pipe group,passes between blowing surfaces of two pneumatic brooms, and then exits the insulation shield through a horizontal narrow slit in the outlet side of the insulation shield after passing through a clearance between two air cutters; and finally the strip steel is conveyed out by two outlet stabilizing rollers. According to the non-contact pneumatic-broom-type strip steel hot-dip galvanizing system, creative innovation is performed on a traditional hot-dip galvanizing system in principle; a traditional sink roll is omitted; a sink-roll-free-type galvanizing mode is adopted, so that principle defects of a traditional hot-dip galvanizing mode can be effectively avoided; zinc liquid for hot-dip galvanizing is circularly supplied in the invention, so that the aim that no zinc slags exist in a zincbath is realized, and labor consumption is effectively lowered; by adopting the hot-dip galvanizing system provided by the invention, surface quality of the strip steel can be effectively ensured; and the surface scratching rate and the coiled strip steel rejection rate can be obviously lowered, so that the yield is improved.

Description

technical field [0001] The invention relates to a hot-dip galvanizing system, in particular to a non-contact pneumatic broom-type strip steel hot-dip galvanizing system, which belongs to the technical field of metallurgical equipment. Background technique [0002] Hot-dip galvanized sheet is a large amount of sheet and strip products. Traditional hot-dip galvanized products are mainly carried out by using a zinc pot, in which a sinking roller is set in the zinc pot, and the strip steel is dipped into the zinc pot by the sinking roll and removed from the zinc pot. In order to achieve the purpose of galvanizing the surface of the strip steel, this traditional method requires regular cleaning of the zinc pot and the shutdown of the production line, which consumes a lot of manpower and material resources. The zinc slag generated in the pot is very easy to adsorb on the surface of the strip and scratch the surface of the strip; in addition, the sinking roll set in the zinc pot in...

AI Technical Summary

Problems solved by technology

[0002] Hot-dip galvanized sheet is a large amount of sheet and strip products. Traditional hot-dip galvanized products are mainly carried out by using zinc pots, in which sinking rolls are set in the zinc pots, and the strip steel is immersed in the zinc pot by using the sinking rolls and removed from the zinc pot. In this way, the surface of the strip steel can be galvanized, but this traditional method needs to regularly clean the zinc pot, requires the production line to be shut down, and then consumes a lot of manpower and material resources for cleaning, and the zinc The zinc slag generated in the pot is very easy to adsorb on the surface of the strip and scratch the surface of the strip; in addition, the sinking roll set in the zinc pot in the traditional production process is a necessary key component, but the existence of the sinking roll has a great impact on the surface of the strip. Roughness and final quality have a great impact. Once the process parameters are not set properly, production accidents such as scratches are very likely to occur, which will eventually lead to the serious consequences of scrapping the entire strip

[0003] To sum up, the traditional zinc pot has many principle defects in the process and equipment. Although a large number of improved researches have been carried out on the above-mentioned traditional process in recent years, the effect is minimal because the principle process has not changed. Therefore, It is necessary to study the hot-dip galvanizing system in principle in order to fundamentally solve the above technical problems

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