Water mist pinch pass rolling process in cold rolling wet pinch pass rolling production

Abstract

The invention relates to a process for carrying out pinch pass rolling production by adopting water mist pinch pass rolling, in particular to a water mist pinch pass rolling process in the cold rolling wet pinch pass rolling production, which is characterized by comprising the following steps of: 1, water mist pinch pass rolling: (1), arranging a water mist pinch pass rolling spraying device at an inlet of a wet pinch pass mill, wherein a nozzle orifice of a nozzle of the water mist pinch pass rolling spraying device faces towards a roll gap between a working roll and a supporting roll; and (2), when the wet pinch pass mill starts pinch pass rolling, spraying mist pinch pass rolling liquid by the nozzle; after the pinch pass rolling is ended, stopping spraying by the nozzle; and 2, sucking for removing dust by adopting a water mist pinch pass rolling suction dust-removing system: (1), using a lower port of a winding-preventing guide plate as a first suction opening, arranging an inlet exhaust tube at the inlet side of the wet pinch pass mill, and using a lower port of the exhaust tube at the inlet side as a second exhaust tube; and (2), when the wet pinch pass mill starts the pinch pass rolling, starting an exhaust fan, and when the pinch pass rolling is ended, stopping the exhaust fan. According to the process, the surface quality of strip steel can be enhanced, and the production energy consumption can be reduced.

Description

technical field [0001] The invention belongs to the technical field of cold rolling and leveling, and in particular relates to a technology for leveling production by water mist leveling, which is applied to various cold rolling and leveling units. Background technique [0002] Traditional leveling production includes dry leveling and wet leveling. The dry skinning process will generate a lot of dust during the skinning process, which will cause surface pollution of the finished strip steel. For wet leveling, a wet leveling spray beam is arranged on the entrance side, and 8 to 12 nozzles are arranged on the spray beam, and each nozzle sprays about 108 to 168 L / h of leveling liquid, and sprays a large amount of leveling liquid onto the work roll and the strip , Flush the dust generated during the leveling process. However, after a large amount of leveling liquid is sprayed onto the strip surface, problems such as residual leveling liquid on the strip surface after leveling ...

AI Technical Summary

Problems solved by technology

Although the traditional leveling suction dust removal process can suck and discharge part of the dust and mist, but because the suction tuyere arranged above the closed cover is too high, it cannot achieve a good effect, and there are still a lot of mist and dust in the production process. Bring defects to the strip surface and affect product quality

And because the tuyere arranged on the closed cover is too high, the power requirement for the suction fan is relatively high, which consumes a lot of electric energy

[0006] Therefore, the traditional cold-rolled smoothing process has technical defects in product surface quality control

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