公开(公告)号：US20200270754A1

公开(公告)日：2020-08-27

申请号：US16756797

申请日：2018-12-20

Applicant: ArcelorMittal

Inventor： Andrea NAVES ARNALDOS ,  Elena PIEDRA FERNANDEZ ,  Vanesa MENENDEZ DELMIRO ,  Salome LOPEZ GONZALEZ

IPC: C23G1/08 ,  C23G1/36 ,  C23G3/02 ,  B01D61/14

Abstract: The invention relates to a method for pickling steel sheets 8, the steel sheets being continuously dipped in a pickling bath 1, containing a pickling solution 10, the bath being connected to a treatment unit including a recirculation tank 3, circulators 12 and 13, a continuous entering flow 11 of the solution being fed into an ultrafiltration device 2 from the recirculation tank 3 and two flows exiting the ultrafiltration device, one filtered exiting flow 21 being then fed back inside the recirculation tank 3 and one unfiltered flow 22, the treatment unit including no storage tank.