A self-adaptive control method for dew point of hot-dip galvanized products with different alloy components
A technology of self-adaptive control and alloy composition, applied in the direction of heat treatment process control, heat treatment furnace, manufacturing tools, etc., to achieve the effect of eliminating pitting defects, obvious control effect, and inhibiting external oxidation.
Active Publication Date: 2022-04-01
MAANSHAN IRON & STEEL CO LTD
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Problems solved by technology
[0004] The hearth design of conventional vertical continuous annealing furnaces in the prior art does not realize segmental control of dew point according to different products and different furnace zones
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[0031] The specific implementation of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.
[0032] The invention relates to a dew point self-adaptive control method for hot-dip galvanized products with different alloy components, which is applied to a dew point self-adaptive control system of a vertical continuous annealing furnace with front and rear penetration.
[0033] In order to solve the problems existing in the prior art and overcome its defects, and realize the invention goal of reducing the generation of alloy elements on the surface oxide of the steel plate, the technical scheme adopted by the present invention is:
[0034] Such as Figure 1 to Figure 3 As shown, the dew point self-adaptive control system of th...
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The invention discloses a dew point self-adaptive control method for hot-dip galvanized products with different alloy components. The dew point self-adaptive control system is provided with a plurality of humidification points and multiple dew point meter; humidified N 2 Gas is transported by pipeline N 2 Pass through a heatable tank with desalinated water and an atomizing device in the tank to humidify the N passing through the tank 2 gas, then the N with moisture is passed through the pipeline 2 into the furnace body; the dew point meter detects the dew point in the heating and soaking area of the annealing furnace, and feeds back the humidified gas N leading to the furnace 2 amount. By adopting the above-mentioned technical scheme, the dew point in the furnace area is optimally controlled within a certain range, and a reasonable distribution of the dew point in the furnace is obtained; it not only satisfies the suppression of external oxidation, but also ensures that the surface can be fully restored in the soaking section, and the nodulation of the furnace roll is well controlled and very easy The pitting defects are well eliminated, and obvious control effects have been achieved.
Description
technical field [0001] The invention belongs to the technical field of metallurgical industrial production, and relates to the manufacturing technology of galvanized products. More specifically, the invention relates to a dew point self-adaptive control method for producing hot-dip galvanized products with different alloy components in a front-to-back transparent vertical continuous annealing furnace . Background technique [0002] The dew point is a technical parameter that reflects the moisture content in the protective gas in the furnace. The dew point directly affects the reduction of iron oxide on the surface of the strip. The dew point of each section of the furnace is related to the oxidation-reduction rate of the strip surface. During normal production, the changes in the composition of the protective gas in the furnace and the state of the strip surface being reduced by hydrogen cannot be directly measured, but these changes in the furnace can be inferred indirectly...
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IPC IPC(8): C21D11/00C21D1/26C21D1/74C21D9/56
CPCC21D11/00C21D1/26C21D1/74C21D9/561
Inventor 刘茂林叶明成杨兴亮谢义康许翔钱鑫周红兵左怀丞
Owner MAANSHAN IRON & STEEL CO LTD