Development of Optimal Stage Calculation Program for the Design of Waste Etchant Recovering Process

In this study, we found out the relation between  recovering-concentration and stage number of extraction process for invar ( Fe+Ni) etching process. In order to get the desired   recovering- concentration economically, we developed the simulation program for designing the optimal  extraction process. We got the key parameter for this simulation program through pilot scale experiments. The process simulation by the developed program could reduce the emission of waste etching solution as well as the treatment costs. In addition, the developed program could calculate the number of stage of the etchant recovering system and the process time to get the desired concentration of  . This program was used to compute the optimal capacity of the etchant recovering system and applied to the optimization of the stage of the etchant recovering system in real IT industry.