Continuous hot galvanization equipment and continuous hot galvanization method for hot rolled strip steel

A technology for hot-rolled strip steel and hot-dip galvanizing, which is applied in hot-dip plating process, coating, metal material coating process, etc., can solve the problems of high furnace temperature, poor furnace operating environment, long furnace length, etc. The effect of length shortening, current penetration depth is small, and space occupation is small

Pending Publication Date: 2018-04-27
ANDRITZ CHINA
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Problems solved by technology

In order to ensure sufficient heating capacity, a large number of gas radiant tubes must be configured, so the furnace length is longer; at the same time, the furnace temperature is high, resulting

Method used

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  • Continuous hot galvanization equipment and continuous hot galvanization method for hot rolled strip steel

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Embodiment Construction

[0026] figure 1 is a schematic diagram of a hot-rolled strip continuous hot-dip galvanizing plant according to the present invention. As shown in the figure, in one embodiment of the continuous hot-dip galvanizing equipment for hot-rolled strip steel according to the present invention, the hot-rolled strip steel after on-line pickling enters the heating section 2 from the entrance sealing section 1, and is heated in a reducing atmosphere. Heating to above 500°C fully reduces the thin layer of iron oxide on the surface of the strip steel, and then passes through the soaking section 3 and cooling section 4 to keep the strip steel temperature at about 475°C, passes through the exit section 5, and then enters the zinc pot 9 for galvanizing. The temperature entering the zinc pot should be adjusted according to the thickness and variety of the strip steel. Wherein, the heating section 2 is an induction heating section, the soaking section 3 is an electric heating soaking section, a...

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Abstract

The invention relates to a continuous hot-dip galvanizing equipment for hot-rolled strip steel, which comprises an inlet sealing section (1), a heating section (2), a soaking section (3), A cooling section (4), an outlet section (5) and a zinc pot (9), wherein the heating section (2) has induction heating equipment. The present invention also relates to a continuous hot-dip galvanizing method for hot-rolled strip steel, which adopts the above-mentioned continuous hot-dip galvanizing equipment for hot-rolled strip steel, and includes the following steps: making the hot-rolled strip steel pass through the The heating section (2), wherein the hot-rolled strip is heated in the reducing atmosphere in the heating section (2) to fully reduce the thin layer of iron oxide on the surface of the hot-rolled strip (S1), so that the hot-rolled strip The steel passes through the soaking section (3) and the cooling section (4) (S2), so that the hot-rolled steel strip enters the zinc pot (9) at a process temperature suitable for galvanizing for galvanizing (S3).

Description

technical field [0001] The invention relates to a continuous hot-dip galvanizing equipment and method for hot-rolled strip steel, in particular to a continuous hot-dip galvanizing equipment and method for hot-rolled strip steel using induction heating. Background technique [0002] At present, galvanizing lines basically produce galvanized sheets with cold-rolled sheets as the substrate, and there is no professional large-scale continuous galvanizing line for hot-rolled strip steel. [0003] The hot-rolled galvanized sheet uses the hot-rolled sheet as the substrate and is directly galvanized after pickling. Compared with the traditional galvanized sheet (cold-rolled galvanized), it has an obvious price advantage due to the lack of cold-rolling process. In the past, hot-rolled sheets have been painted to prevent rust, and the corrosion resistance is poor. With the improvement of user requirements for its anti-corrosion ability, the implementation of hot-dip galvanizing is th...

Claims

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Application Information

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IPC IPC(8): C23C2/06C23C2/02C23C2/40
CPCC23C2/06C23C2/02C23C2/40
Inventor 冯丹
Owner ANDRITZ CHINA
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