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Purification treatment method of zinc pot in hot-dip galvanizing production

A purification treatment and hot-dip galvanizing technology, which is applied in the hot-dip galvanizing process, coating, metal material coating process, etc., can solve the problems of zinc slag adhered to the surface of the strip, excessive Fe content in the zinc pot, and slag belt defects, etc. , to achieve the effect of improving the adhesion and gloss of the zinc layer, improving the quality and improving the purity

Active Publication Date: 2016-08-10
HEBEI IRON AND STEEL
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Problems solved by technology

Since the hot-dip galvanizing production line itself is not equipped with a cleaning section, the Fe content in the zinc pot often exceeds the standard, and a large amount of zinc slag often adheres to the surface of the strip, and in severe cases, a slag band defect is formed

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  • Purification treatment method of zinc pot in hot-dip galvanizing production
  • Purification treatment method of zinc pot in hot-dip galvanizing production

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Embodiment Construction

[0015] The purification treatment method of the zinc pot in the hot-dip galvanizing production is illustrated by taking the 2# galvanizing line of a cold rolling plant in Hebei as an example. Since the production line itself is not equipped with a cleaning section, the Fe content in the zinc pot often exceeds the standard, and the surface of the strip often A large amount of zinc slag is adhered, and in severe cases, slag belt defects are formed. Using this purification treatment method, the zinc pot purification treatment is carried out every other week (7 days). The specific operation process is as follows:

[0016] 1) Increase the aluminum content to 0.25-0.3%, and the staff on duty will increase the number of samples sent to 5-7 times to control the aluminum content in the zinc pot; maintain at least one shift production time (8-12h).

[0017] 2) figure 1 As shown, utilize the high-pressure nitrogen cylinder and the blowing pipeline 2 that is arranged in the zinc pot 1, n...

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Abstract

The invention discloses a method for purifying zinc pots in hot-dip galvanizing production. The purifying process is to carry out hot-dip galvanizing production under the condition that the aluminum content of the zinc liquid in the zinc pot is maintained at 0.025-0.030 wt%. Clean up the scum in the zinc pot during the galvanizing production process. This purification treatment method increases the aluminum content in the zinc liquid in the zinc pot from the usual 0.18-0.20% to 0.025-0.030%, thereby inhibiting the formation of iron in the zinc pot and improving the adhesion and gloss of the zinc layer of the galvanized sheet , Effectively improve the quality of galvanized sheet. The iron content in the zinc pot treated by the purification treatment method is obviously reduced, thereby laying a foundation for the subsequent generation.

Description

technical field [0001] The invention relates to a galvanizing technology, in particular to a method for purifying zinc pots in hot-dip galvanizing production. Background technique [0002] As hot-dip galvanized products are widely used in construction, light industry, household appliances and automobile industries, people have stricter requirements on the surface quality of hot-dip galvanized sheets. Hot-dip galvanizing generally adopts a device with a structure of three rolls, six arms, and a furnace nose, which is composed of a zinc pot, a furnace nose, a sinking roll, a front stabilizing roll, a rear stabilizing roll, an air knife and its adjustment device; its working process is: the steel strip is passed through The furnace nose enters the zinc liquid in the zinc pot for immersion plating, and then goes out of the zinc pot after bypassing the sinking roll, and then enters the alloying furnace or cooling stage through the front and rear stabilizing rolls and air knife. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06
Inventor 孙力刘大亮李一栋于世川谭文振张洪波刘小川王迎春
Owner HEBEI IRON AND STEEL
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