B - Operations – Transporting – 05 – C
Patent
B - Operations, Transporting
05
C
204/123, 141/13,
B05C 3/02 (2006.01) B08B 3/04 (2006.01) C25D 19/00 (2006.01)
Patent
CA 1047376
A B S T R A C T A method for treating a metal surface treating solution and a rins- ing liquid in the metal surface treatment process in described wherein a pro- cess solution is circulated in at least one water washing tank in the direc- tion opposite to the direction of advance of treated articles. The articles are successively transported to a surface treatment tank and a water washing tank. Process solution is introduced into a concentration process connect- ed to the surface treatment tank to separate and recover effective ingredients of the surface treating solution from the process solution, by subjecting the process solution continuously to the concentration treatment. A washing water is supplied at a prescribed rate from a water source to a final water washing tank for washing surface-treated articles. Toxic substances contain- ed in an exhaust gas generated in the surface treatment tank are collected and introduced into the concentration process to separate and recover effect- ive ingredients of the surface treating solution. The total process is con= ducted in a completely closed system without discharging active ingredients of the surface treating solution and wash water outside the system.
213756
Ishiyama Koichi
Sakata Yuji
Wada Ikuo
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