Continuous hot dip galvanizing zinc liquid aluminium content adjusting method

An adjustment method, hot-dip galvanizing technology, applied in hot-dip galvanizing process, coating, metal material coating process, etc., can solve problems affecting the quality, performance and cost of coating products, and large fluctuations in aluminum content

Inactive Publication Date: 2010-06-02
PANGANG GRP PANZHIHUA STEEL & VANADIUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem existing in the prior art is that when the aluminum content of the zinc ingot is between the above ranges, the aluminum content fluctuates greatly during the adjustment of the aluminum content of the zinc liquid, thereby affecting the quality, performance and cost of the coated product

Method used

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  • Continuous hot dip galvanizing zinc liquid aluminium content adjusting method
  • Continuous hot dip galvanizing zinc liquid aluminium content adjusting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The continuous hot-dip galvanizing unit continuously produces strip steel with a specification of 1100mm×0.6mm and a coating weight of 120g / m 2 (Double-sided) galvanized products, the weight of the zinc bath in the zinc pot is about 176 tons, and the chemical analysis method is used to detect the total aluminum content in the zinc bath. It is tested every 4 hours during the production process, and the zinc bath level remains unchanged. as the benchmark. During the continuous production process, the unit maintains the zinc liquid level by adding zinc ingots, and the weight of each zinc ingot is about 1000kg. The initial detection of the total aluminum content in the zinc liquid was 0.175%, and the zinc liquid level was maintained by adding 6 main zinc ingots ①. Detect again by chemical analysis method and know that the total aluminum content in the zinc liquid is 0.186%, add 1 main zinc ingots ① and 4 main zinc ingots ② again, to keep the zinc liquid level. The third t...

Embodiment 2

[0024] The continuous hot-dip galvanizing unit continuously produces strip steel with a specification of 1100mm×0.5mm and a coating weight of 200g / m 2 (Double-sided) galvanized products, the weight of the zinc bath in the zinc pot is about 176 tons, the total aluminum content in the zinc bath is detected by chemical analysis, and it is tested every 4 hours during the production process, with the zinc bath level unchanged as the benchmark . The unit maintains the zinc liquid level by adding zinc ingots during the continuous production process, and the weight of each zinc ingot is about 1000kg. The initial detection of the total aluminum content in the zinc liquid was 0.191%, and the zinc liquid level was maintained by adding 1 main zinc ingot ① and 8 main zinc ingots ②. The total aluminum content in the zinc solution was detected by chemical analysis again to be 0.177%. Since then, 8 main zinc ingots have been added, and the total aluminum content in the zinc liquid has been ...

Embodiment 3

[0026] The continuous hot-dip galvanizing unit continuously produces strip steel with a specification of 1100mm×1.0mm and a coating weight of 200g / m 2(Double-sided) galvanized products, the weight of the zinc liquid in the zinc pot is about 176 tons, and the total aluminum content in the zinc liquid is detected by chemical analysis. It is tested every 4 hours during the production process, and the zinc liquid level is constant. benchmark. The unit maintains the zinc liquid level by adding zinc ingots during the continuous production process, and the weight of each zinc ingot is about 1000kg. The initial detection of the total aluminum content in the zinc solution was 0.193%. During this period, 2 main zinc ingots ① and 16 main zinc ingots ② were added according to the weight ratio of 1:8, and the total aluminum content was tested 3 times, and the total aluminum content was 0.193%, 0.195%, and 0.197% respectively. Then add 10 main zinc ingots ② and detect the total aluminum c...

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Abstract

The invention provides a continuous hot dip galvanizing zinc liquid aluminium content adjusting method. In the continuous hot dip galvanizing technical process, the total Al content in zinc liquid is detected, and the steps are carried out: if the total Al content is less than or equal to 0.185%(weight), a main zinc ingot (1) metal is added; if the total Al content is more than 0.185%(weight) and less than or equal to 0.190%(weight), the main zinc ingot (1) and a main zinc ingot (2) are added based on the weight ratio of 1:4; if the total Al content is more than 0.190%(weight) and less than or equal to 0.195%(weight), the main zinc ingot (1) and the main zinc ingot (2) are added based on the weight ratio of 1:8; if the total Al content is more than 0.195%(weight) and less than 0.22%(weight), the main zinc ingot (2) is added; if the total Al content is more than or equal to 0.22%(weight), a pure zinc ingot and the main zinc ingot (2) are added based on the weight ratio of 1:4; and in the adding process, the unchanged zinc liquid level is taken as reference.

Description

technical field [0001] The invention relates to the technical field of steel plate surface coating, in particular to a method for adjusting the aluminum content of a continuous hot-dip galvanizing solution. Background technique [0002] Continuously galvanized steel sheets (abbreviated as GI) have been widely used in industrial production due to their good surface quality, excellent corrosion resistance and low cost. With the acceleration of my country's industrialization process, its consumption will increase. [0003] In continuous hot-dip galvanizing production, aluminum is one of the most critical elements added to the zinc bath. Adding a certain amount of aluminum to the zinc pot can greatly improve the performance of the zinc bath and coating, and improve product quality and performance. Its main effects are as follows: First, the aluminum element can react on the surface of the steel base to produce Fe 2 Al 5 , strengthen the combination of the coating and the stee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/40
Inventor 刘春富周一林金永清刘俊文蒋英箴张妞妞
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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