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Process flow of galvanized coil
Release time:
2022-10-19
The cold and hot rolled steel plate is degreased by alkali washing, washed with water, dried and then annealed in a horizontal (vertical) heating furnace with radiant tube heating. A certain amount of hydrogen is introduced into the furnace to make the early layer reduction atmosphere in the furnace.
1. The cold and hot rolled steel plate is degreased by alkali washing and washed with water. After drying, it enters a horizontal (vertical) heating furnace with radiant tube heating for annealing. A certain amount of hydrogen is introduced into the furnace to make the early layer reduction atmosphere in the furnace.
2. The steel strip heated to a certain temperature is immersed in zinc liquid for hot dip galvanizing under certain conditions.
3. While the size of zinc flowers is controlled by liquid zinc, forced cooling is adopted to control the size of zinc flowers. Before the zinc flowers begin to diffuse, small zinc flower products are quenched with small zinc flower equipment to prevent the zinc liquid from continuing to diffuse and form small zinc flowers.
4. After hot-dip galvanizing, the waiting post is cooled and then the surface is finished. Finally, according to the application, the surface is passivated or directly produced into a color-coated coil.
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