Tin Stripping Solution And Tin Recycling Equipment
Waste Liquid Treatment Capacity: 0-160 tons/month
Metal Production: 0-10 tons/month
Electricity Load: 15-50 kW
Tin Stripping Solution And Tin Recycling Equipment Overview
Tin stripping solution is commonly used for the removal of tin/lead and tin alloy layers from copper surfaces in the manufacturing process of electronic components (ICs) and printed circuit boards (PCBs), as well as for the removal of tin plating, tin-lead alloy plating, and tin solder joints. It is especially suitable for removing tin or lead-tin alloy layers on the copper surface of electronic components and discarded printed circuit boards. It can be operated by immersion or mechanical spraying.
The waste tin stripping solution usually contains metal ions(mainly tin (Sn) and other alloy components, such as copper (Cu), lead (Pb), etc.), acidic compounds(such as hydrofluoric acid (HF), nitric acid (HNO3), etc., used to dissolve the metal in the tin stripping process.), organic compounds(The tin stripping solution may contain some additives or auxiliaries.). These components make the waste solution need special treatment to be recycled and reused.
The tin stripping solution regeneration and tin recycling equipment are mainly concerned with the technology of recovering and recycling tin stripping solution. The equipment is designed to minimize resource waste, improve processing efficiency, and reduce environmental pollution. The equipment can regenerate the process through the following processes:
- Waste liquid filtration and purification
First, the waste liquid needs to go through coarse filtration to remove suspended matter and large particle impurities. Next, the liquid is further purified by ion exchange, activated carbon adsorption, or electrochemical methods. - Metal Separation and Recovery
Electrolysis or chemical precipitation is utilized to separate tin ions from the waste liquid. Electrolysis equipment allows tin to be deposited in solid form on the electrode surface, and the recovered tin can be used for reprocessing. The chemical precipitation method precipitates tin as a precipitate by adding a precipitating agent, which is then recovered by equipment such as filter presses. - Recycling
The treated waste liquid can be reused in production after neutralization, pH adjustment, and other steps to reduce the use of fresh acid.
Our Product/System Features
Our tin stripping solution and tin recycling equipment have a lot of technological advantages that meet the needs of the market.
- The composition parameters of the tin-returning regeneration liquid are stable, and the tin stripping rate and copper bite amount after reuse are similar to that of the purchased sub-liquid phase.
- The exhaust gas tower is set with an automatic adding control device, and the calibration and overhaul of the induction probe at regular intervals, which can effectively prevent the emission of waste gas;
- The storage containers are set with double-layer high-level induction alarms to prevent solution leakage, safe and without hidden danger;
- The regeneration liquid can realize 100% reuse;
- The equipment covers a small area and has a low investment cost.
Working Principle/Process
Tin Recycling Equipment Structures
A typical tin recycling plant consists of the following modules
- Filter unit: For initial removal of impurities.
- Electrolysis tanks: For recovery of tin by deposition using electrolysis.
- Precipitation tank: Recovery of tin by chemical precipitation.
- Recycling system: Recycling of the treated liquid back into the process.
- Wastewater treatment system: To treat the remaining wastewater harmlessly to meet the discharge standards.
Waste Tin Stripping Solution & Tin Recycling Equipmet Working Principle
The main process of the waste tin stripping solution regenerating and tin recycling equipment is to add special precipitants and precipitation aids to the tin waste liquid, and selectively precipitate the metal tin and copper ions in the retreated tin waste liquid. The solid-liquid separation device separates the metal precipitation and the upper layer of the clear liquid, and then obtains the tin sludge and clarified filtrate with a tin content of 30%. The filtrate is adjusted for the composition of the filtrate and its indexes reach the requirements required for retreated tin production and then returned to the tin production line through the automatic control of the addition system. After the filtrate is adjusted to meet the requirements of the tin production line, it is returned to the tin production line through the automatic control adding system, thus realizing the recycling of resources and zero discharge of waste liquid, energy saving, and environmental protection.
Technical Parameters
Model | Waste Liquid Treatment Capacity (tons/month) | Metal Production (tons/month) | Electricity Load (kW) | Occupied Area (m2) |
SN20TB | 5-20 | 0.3-1.2 | 15 | 45 |
SN80TB | 25-80 | 1.5-5 | 30 | 120 |
SN160TB | 80-160 | 5-10 | 50 | 200 |