Spraying type strip steel continuous hot galvanizing system

Abstract

The invention discloses a spraying type strip steel continuous hot galvanizing system. Strip steel is rolled in from a steering roller, enters a heat preservation cover from two conveying rollers at the lower portions of two supports, penetrates the part between spray guns on the two sides of the heat preservation cover from bottom to top, then penetrates out of the heat preservation cover throughan upper horizontal narrow gap of the heat preservation cover and the center position of a pair of air knives located at the upper portion, and is finally conveyed out through two conveying rollers at the upper portions of the two supports. According to the spraying type strip steel continuous hot galvanizing system, creative innovation is conducted on a traditional hot galvanizing system from the principle, a traditional sinking roller is eliminated, galvanizing is conducted in a non-sinking-roller manner, and principle defects of the traditional hot galvanizing manner can be effectively avoided. Through circular supply of zinc liquid of hot galvanizing, the purpose of no zinc slag of a zinc pot is achieved, manpower consumption is effectively reduced, the production cost is saved, and meanwhile the production efficiency is improved. By adoption of the hot galvanizing system, the strip steel surface quality can be effectively guaranteed, the surface scratching rate and the rolled strip steel rejection rate can be obviously reduced, and the yield is improved.

Description

technical field [0001] The invention relates to a hot-dip galvanizing system, in particular to a spray-coating continuous hot-dip galvanizing system for strip steel, 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 the...

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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