Recovery system for noble metals for electroplating

Abstract

The invention discloses a recovery system for noble metals for electroplating. The recovery system comprises a gold-bearing wastewater collecting tank. A water outlet pipe of the gold-bearing wastewater collecting tank is connected with at least three filtration columns connected in series. A circulating pipeline, which is used for transporting wastewater and can adjust the filtering sequence, is arranged between the filtration columns and the gold-bearing wastewater collecting tank. The circulating pipeline is connected in series with the filtration columns in sequence, and can adjust the filtering sequence arbitrarily; three filtering modes are provided; the replaced new resin filtration column is considered as the last one exchange column; the maximal adsorption capacity of gold ions in wastewater is ensured; the circulating pipeline is connected with valves at all positions to control the cycling filtration sequence of sewage, so that the cost is reduced, and the filtering efficiency of the resin filtration columns is improved; and besides, the downtime during the filtering process is shortened, the production continuity is ensured, and the production cost is reduced.

Description

【Technical field】 [0001] The invention relates to a precious metal recovery system for electroplating. 【Background technique】 [0002] In the process of electroplating lead frame production, there will be continuous ultra-low concentration precious metal waste liquid. Due to the scarcity and high price of precious metal resources, they usually need to be recycled. In the existing production process, the resin tower is often operated by a single unit , but in the process of use, the filtering effects of the old and new resin towers are not equal, frequent replacement of the resin tower increases the cost, and it cannot guarantee that the metal ions in the wastewater are completely absorbed and recovered, and it is necessary to stop recycling to regenerate or replace the resin during use. Recovery cannot be continuous, and the efficiency and recovery rate are low, which brings great inconvenience to wastewater treatment and precious metal recovery. 【Content of invention】 ...

AI Technical Summary

Problems solved by technology

[0002] In the process of electroplating lead frame production, there will be continuous ultra-low concentration precious metal waste liquid. Due to the scarcity and high price of precious metal resources, they usually need to be recycled. In the existing production process, the resin tower is often operated by a single unit , but in the process of use, the filtering effect of the new and old resin towers is different, frequent replacement of the resin tower increases the cost, and it cannot guarantee that the metal ions in the wastewater are completely absorbed and recovered, and the recovery needs to be stopped to regenerate or replace the resin during use. Recovery cannot be continuous, and the efficiency and recovery rate are low, which brings great inconvenience to wastewater treatment and precious metal recovery.

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