Patent ID: 7011714
Filing Date: 2006-03-14
Classification: C23G

Abstract:
1. Process for treating surfaces of metallic strip material, especially for pickling rolled material, which is conveyed through a treatment channel having an entrance and an exit, the process comprising spraying a pickling solution that contains acid on the strip mater by jets, such that the jets at the channel entrance are directed in the direction of strip transport, and the jets at the channel exit are directed in the direction opposite the direction of strip transport to prevent the pickling solution from flowing off too quickly, and directing additional nozzle jets between the channel entrance and the channel exit in the direction opposite the direction of strip transport, wherein the flow of pickling solution out of the channel at the channel exit is further delayed by mechanical resistance devices within the length of the transport channel, further including providing slide rings mounted on the bottom of the channel and having a flow profile, and adjusting a distance of the mechanical resistance devices from the slide rings to a height of the flow.