SYSTEM FOR ON-LINE FILTERING SMEAR REMOVAL SOLUTION FORM SMEAR REMOVAL TANK

摘要

A system and method are provided for the on-line filtration of potassium permanganate desmearing solution (18). The solution (18), with manganese dioxide precipitate, is continuously pumped from a desmearing tank (12) so the precipitate can be removed. The system has piping (14) resistant to any chemical corrosion that either the solution or the precipitate may cause. An air-driven diaphragm pump (28) is used to pump the solution-precipitate mixture through the system. A multi-tube filter unit (32) removes the precipitate from the mixture. The filtered, precipitate-free, solution is then returned to the desmearing tank (12).