In the production process of printed circuit boards (PCB), the outer layer of the production of a positive piece of graphic surface is plated with a layer of tin with a thickness of 5 ~ 8 microns, etching molding and then dissolving the surface layer of tin. When the tin content of the solution reaches a certain concentration, the tin stripping decreases, and it is discharged from the tin stripping equipment to become the tin stripping waste liquid.
Tin stripping waste liquid/solution contains a large amount of nitric acid and other components, a high boiling point, corrosive, included in the national list of hazardous wastes, if you take entrusted to the qualified recycling unit for treatment, due to the concentration of tin concentration does not reach the concentration of valuable recycling, there are problems such as high cost, transfer untimely, accumulation of storage and so on, which affects the normal production of the enterprise, resulting in a waste of tin resources.
JXSC provides a recycling and regeneration system for waste tin stripping solutions, which can efficiently recover tin and copper and also realize the regeneration and utilization of tin-stripping waste liquid.
The recycling system of tin waste liquid is a technical equipment used to treat and recycle the tin stripping waste liquid generated during the electronic manufacturing process of printed circuit boards (PCBs) and other electronic manufacturing processes. Its core purpose is to recover valuable tin from the waste liquid and to recycle and reuse the treated waste liquid, thereby reducing waste liquid emissions, saving resources, and reducing environmental pollution.
The benefit of this waste-in-stripping solution recovery system is that it realizes the recycling of resources, reduces production costs, and at the same time reduces pollution to the environment.
Working Principle and Process
The process of regenerating and recovering tin waste liquid is to add a special precipitator and sedimentation aid to the tin waste liquid, selectively settle the metal tin and copper ions in the tin waste liquid, and then separate the metal precipitation from the super clear liquid through the solid-liquid separation device to obtain the tin mud with 30% tin content and clarified filtrate. After the composition of the filtrate is adjusted to meet the requirements of tin production, the filtrate is returned to the tin production line for use through the automatic control adding system, so as to realize the recycling of resources and the zero discharge of waste liquid.
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