Online spraying device for steel billet anti-oxidation coating and online spraying method thereof

Abstract

The invention discloses an online spraying device for steel billet anti-oxidation coating. The online spraying device comprises a steel billet information detecting system, a steel billet pretreatmentsystem for treating the surface of the steel billet, a spraying system and a conveying roller. The steel billet enters a heating furnace sequentially through the steel billet information detecting system, the steel billet pretreatment system and the spraying system along with the conveying roller. The steel billet information detecting system includes an inductive probe for detecting the surfacetemperature and length of the steel billet and a central processor. The inductive probe is connected with the central processor. The steel billet pretreatment system and the spraying system are connected with the central processor. The inductive probe detects the surface temperature and length of the steel billet, when the temperature is higher than 600 DEG C, the central processor will not make any instructions, and when the temperature is not higher than 600 DEG C, the central processor will calculate the opening time and operating time after the opening of the steel billet pretreatment system and the spraying system and instruct the same to enter a state ready to operate. The invention further discloses an online spraying method for steel billet anti-oxidation coating.

Description

technical field [0001] The invention belongs to the technical field of anti-oxidation of steel slabs, and in particular relates to an on-line spraying device and a spraying method of an anti-oxidation paint for steel slabs. Background technique [0002] In iron and steel enterprises, billets after continuous casting generally need to be heated in a heating furnace before they can be rolled. The heating temperature is generally 1100-1300°C, and the heating time is generally 2-4 hours. Due to the influence of the high-temperature oxidizing atmosphere in the heating furnace, The heated billet is very prone to oxidative burning loss, and the burning loss rate is 0.5-1.5%, which not only affects the yield, but also affects the surface quality of steel products to a certain extent. [0003] At present, some enterprises, universities and scientific research institutes have developed anti-oxidation coatings with better anti-oxidation effects in the laboratory, and some of them have ...

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Problems solved by technology

[0003] At present, some enterprises, universities and scientific research institutes have developed anti-oxidation coatings with better anti-oxidation effects in the laboratory, and some of them have realized industrial applications. And the device is the restrictive link of the application of this technology

In addition, due to the presence of iron scale on the surface of the continuous casting slab, direct spraying without treatment will affect the adhesion between the paint and the billet, thereby affecting the anti-oxidation effect of the paint

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