Method for continuously hot-dipping zinc on strip steel to prevent strip breakage in roll change
A technology of hot-dip galvanizing and strip steel, applied in hot-dip galvanizing process, coating, metal material coating process, etc., can solve the problems of waste, extremely high skill requirements of operators, etc., and achieve the effect of reducing the amount of waste.
Inactive Publication Date: 2014-07-16
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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Problems solved by technology
Using this method will often produce a lot of non-target products; and after replacing the sinking roller group, the specification needs to be transferred back to the target specification, resulting in great waste; it is still necessary to shorten the time for loading the sinking roller group and the start-up time of the unit after loading. It has extremely high requirements on the equipment status of the unit and the skills of the operators
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[0028] The invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0029] In order to provide a method for continuously hot-dip galvanizing strip steel that can reduce waste and non-standard products and prevent strip breakage when changing rolls. like Figure 2 to Figure 7 As shown, the method for continuous hot-dip galvanizing of strip steel to prevent the strip from being broken when changing rolls comprises the following steps: a. After the sinking roll system 5 is lifted out of the zinc pot 6, the furnace nose 1 is lifted, and the strip steel 3 is tightened to make the strip steel 3 All are located above the zinc liquid level 7; b, pull out the uncoated part 2 of the strip steel 3 from the furnace nose 1; c, install an isolation device 8 between the unplated part 2 and the zinc liquid level 7; d, cut off the strip steel The plated part 4 of 3; e, connect the corrosion-resistant belt 9 with the unplated part 2; f...
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The invention discloses a method for continuously hot-dipping zinc on strip steel to prevent strip breakage in roll change, relates to the field of cold-rolled strip steel production, and provides a method for continuously hot-dipping zinc on the strip steel to prevent strip breakage in roll change, which can reduce the production of waste products and non-standard products. The method comprises the following steps of: (a) after a sinking roll system is lifted out of a zinc pot, lifting a furnace nose, tightening the strip steel and enabling the whole strip steel to be positioned on zinc liquid level; (b) pulling out the unplated part of the strip steel from the furnace nose; (c) arranging an isolating device between the unplated part and the zinc liquid level; (d) cutting off the plated part of the strip steel; (e) connecting a corrosion-resistant belt and the unplated part; (f) pulling the whole unplated part back to the furnace nose, and removing the isolating device; and (g) installing the sinking roll system. The method disclosed by the invention can be applied in replacing the sinking roll in the production of continuously hot-dipping zinc on strip steel.
Description
technical field [0001] The invention relates to the field of cold-rolled steel strip production, in particular to a method for continuously hot-dip galvanizing a steel strip to prevent strip breakage when changing rolls. Background technique [0002] Hot-dip plating technology is a kind of material to be plated (such as steel or other alloys) is immersed in the molten coating metal liquid, and the metal surface of the substrate is kept in contact with the molten metal for a period of time, and then taken out to make it adhere to a uniform, surface Clean, coated metal technology that is firmly bonded to the substrate. Hot-dip plating technology is a surface treatment method commonly used in metal products for a long time. Continuous hot-dip galvanizing (aluminum-zinc) for strip steel is that after degreasing, cleaning, continuous annealing and cooling, the strip steel enters the zinc pot through the furnace nose under a protective atmosphere, and turns to leave the zinc pot ...
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IPC IPC(8): C23C2/40C23C2/06
Inventor 刘春富吴晶薛世清林志谦
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM