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

Abstract

The invention relates to continuous hot galvanization equipment for hot rolled strip steel. The continuous hot galvanization equipment comprises an inlet sealing section (1), a heating section (2), asoaking zone (3), a cooling section (4), an outlet section (5) and a zinc pot (9), wherein acid-pickled hot rolled strip steel can pass through the inlet sealing section (1), the heating section (2),the soaking zone (3), the cooling section (4), the outlet section (5) and the zinc pot (9) in sequence; and the heating section (2) is provided with induction heating equipment. The invention also relates to a continuous hot galvanization method for the hot rolled strip steel; the continuous hot galvanization method for the hot rolled strip steel adopts the continuous hot galvanization equipment for the hot rolled strip steel and comprises the following steps: step (S1) making the hot rolled strip steel pass through the heating section (2), wherein the hot rolled strip steel is heated in reducing atmosphere inside the heating section (2) until a thin iron oxide layer on the surface of the hot rolled strip steel is fully reduced; step (S2) making the hot rolled strip steel pass through thesoaking zone (3) and the cooling section; and step (S3) galvanizing the hot rolled strip steel in the zinc pot (9) at a suitable technological temperature suitable for galvanization.

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...

AI Technical Summary

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 in a poor operating environment around the furnace; the flue gas generated by combustion is discharged into the atmosphere, which contains Large amounts of nitrogen oxides and particulate emissions

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