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Site: Anshan Iron and steel plant

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No. 111 Sheng Lu


The size and structure of the second section zinc pot

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The shape of the zinc pot should be in favor of the potential reduction of internal stress and strain during the manufacture and use of the pot. Zinc pots are generally made into rectangular containers, which are most suitable for the actual production of hot-dip galvanizing. Sometimes a zinc pot with complex shapes is used for ease of operation, but such a pot may have high thermal stress and is generally not recommended. The size of the zinc pot must be determined according to the size of the hot-dip galvanized component and the production capacity of the zinc pot.

1. size of zinc pot

The size of the zinc pot is first determined according to the needs of the product. The minimum size (length, width and depth) of the pot must ensure that a single large workpiece or a certain number of small workpieces can be easily immersed in the pot.

Because of the great heat dissipation of zinc bath surface, the length and width of zinc pot should be reduced as far as possible to save energy consumption on the premise that the workpiece can be conveniently put in. Reduce the heat dissipation of zinc bath surface, can reduce the heat transfer through the wall of zinc pot, also can reduce the heating intensity of zinc pot, which is conducive to extending the life of zinc pot. Zinc bath surface is small, zinc oxide surface zinc oxide ash will also be reduced.

In order to adapt to the long and large-sized hot-dip galvanized products such as transmission steel poles, and do not want the galvanizing pot to be too large, the galvanizing pot can be made into the shape of an isosceles trapezoid with a wide end and a narrow horizontal section, but the width of the two ends of the galvanizing pot can not be too different.

After determining the length and width of the zinc pot, the depth of the zinc pot can be appropriately enlarged, which has the following advantages:

1) when the workpiece is immersed in a deep zinc pot, it is not easy to touch and stir the zinc slag on the bottom of the pot, which is favorable for the sediment. In the zinc bath with good sediment, the surface of the plated parts is smooth and the zinc layer is thin and uniform.

2) Increasing the capacity of zinc pot, that is, increasing the heat capacity of zinc bath, the temperature fluctuation of zinc bath decreases when the workpiece is immersed.

3) Under the same input power, the heating intensity of the pot wall will be reduced, which can reduce the temperature difference between the inner wall of the zinc pot and the zinc bath, which is very important to improve the life of the zinc pot.

In production practice, the range of width and depth of zinc pot is usually 1: (1.3~2).

2. the structure of zinc pot.

The thickness of steel plates used for making zinc pots is usually 40 ~50mm. Large-sized zinc pots, or high-capacity zinc pots (for example, for continuous hot-dip galvanizing of strips and steel wires), can also be made of thicker steel plates, or even can be surfacing with zinc pot materials to thicken the wall. Some small and shallow zinc pots can also be made of steel plates with a thickness of 30 ~40mm. The thickness of the reinforcing plate along the pan of the zinc pot is usually the same as that of the pan wall.


The shape of the zinc pot should be in favor of the potential reduction of internal stress and strain during the manufacture and use of the pot. Zinc pots are generally made into rectangular containers, which are most suitable for the actual production of hot-dip galvanizing. Sometimes a zinc pot with complex shapes is used for ease of operation, but such a pot may have high thermal stress and is generally not recommended. The size of the zinc pot must be determined according to the size of the hot-dip galvanized component and the production capacity of the zinc pot.

1. size of zinc pot

The size of the zinc pot is first determined according to the needs of the product. The minimum size (length, width and depth) of the pot must ensure that a single large workpiece or a certain number of small workpieces can be easily immersed in the pot.

Because of the great heat dissipation of zinc bath surface, the length and width of zinc pot should be reduced as far as possible to save energy consumption on the premise that the workpiece can be conveniently put in. Reduce the heat dissipation of zinc bath surface, can reduce the heat transfer through the wall of zinc pot, also can reduce the heating intensity of zinc pot, which is conducive to extending the life of zinc pot. Zinc bath surface is small, zinc oxide surface zinc oxide ash will also be reduced.

In order to adapt to the long and large-sized hot-dip galvanized products such as transmission steel poles, and do not want the galvanizing pot to be too large, the galvanizing pot can be made into the shape of an isosceles trapezoid with a wide end and a narrow horizontal section, but the width of the two ends of the galvanizing pot can not be too different.

After determining the length and width of the zinc pot, the depth of the zinc pot can be appropriately enlarged, which has the following advantages:

1) when the workpiece is immersed in a deep zinc pot, it is not easy to touch and stir the zinc slag on the bottom of the pot, which is favorable for the sediment. In the zinc bath with good sediment, the surface of the plated parts is smooth and the zinc layer is thin and uniform.

2) Increasing the capacity of zinc pot, that is, increasing the heat capacity of zinc bath, the temperature fluctuation of zinc bath decreases when the workpiece is immersed.

3) Under the same input power, the heating intensity of the pot wall will be reduced, which can reduce the temperature difference between the inner wall of the zinc pot and the zinc bath, which is very important to improve the life of the zinc pot.

In production practice, the range of width and depth of zinc pot is usually 1: (1.3~2).

2. the structure of zinc pot.

The thickness of steel plates used for making zinc pots is usually 40 ~50mm. Large-sized zinc pots, or high-capacity zinc pots (for example, for continuous hot-dip galvanizing of strips and steel wires), can also be made of thicker steel plates, or even can be surfacing with zinc pot materials to thicken the wall. Some small and shallow zinc pots can also be made of steel plates with a thickness of 30 ~40mm. The thickness of the reinforcing plate along the pan of the zinc pot is usually the same as that of the pan wall.