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Titanium Anodes for etching solution recovery are a mature and efficient technology widely used in industries such as PCB (Printed Circuit Board). Due to their superior performance, titanium anodes have become a key equipment component in this field.
Application Background
During PCB manufacturing, the etching process generates a large amount of waste liquid containing high concentrations of copper. As etching progresses, the copper ion concentration in the etching solution continuously increases, and the etching solution loses its activity when it reaches 150 g/L. This waste liquid not only wastes resources but also causes serious environmental pollution if not properly treated.
Titanium anodes are mainly used in etching solution recovery to extract metallic copper through electrolysis. Depending on the etching solution system, the following three process routes are mainly adopted:
• Micro-etching solution treatment: Micro-etching solution (Cu₂SO₄ + H₂O₂) → Oxygen-degrading electrolytic cell (decomposition of H₂O₂) → Electrodeposition of copper
• Alkaline etching solution treatment: Alkaline etching solution → Extraction process → Copper sulfate + Sulfuric acid → Electrodeposition of copper
• Acidic etching solution treatment: Acidic etching solution → Ion-exchange membrane electrolysis (electrodeposition of copper) → Tail gas treatment (absorption of chlorine gas)
Titanium Anode Technology
1. Excellent Corrosion Resistance
In high-chlorine, high-acid etching solution environments, titanium anodes do not undergo matrix dissolution, resulting in a significantly longer service life than graphite and lead anodes, capable of stable operation exceeding 4000 hours.
2. High Current Efficiency and Energy Saving Effect
The noble metal oxide coating effectively reduces oxygen and chlorine evolution potentials, improves the current efficiency of copper recovery, and reduces energy consumption. 3. Low cell voltage, low energy consumption, and an oxygen evolution overpotential approximately 0.5V lower than that of lead alloy insoluble anodes.
4. Environmentally friendly and pollution-free.
Titanium anodes do not release harmful metal ions during electrolysis, avoiding secondary pollution and meeting green production requirements. The substrate is reusable, reducing waste generation.
5. Long service life and low maintenance costs.
Typically, they can be used continuously for 1.5-3 years, requiring less maintenance and significantly reducing equipment downtime and maintenance costs. Service life can reach 2-5 years, with a maximum of 5 years.
Product Specifications
Coating Types
• Iridium-tantalum mixed metal oxide coating: Suitable for micro-etching solutions and alkaline etching solutions
• Ruthenium-iridium mixed metal oxide coating: Suitable for acidic etching solutions
• Platinum-iridium-tantalum mixed metal oxide coating, platinum plating, etc.
Technical Parameters
• Current density: 200-1500A/m²
• Operating temperature: 40-60℃
• Electrode spacing: 15mm
• Cu²⁺ concentration: 150g/L
• H₂SO₄ concentration: 10%
Product Forms
• Anode shape: Sheet, plate, mesh, rod, etc.
• Anode size: Maximum up to 2.5m × 1.2m, customizable according to customer's electroplating tank size
• Coating method: Double-sided coating, plate size 1000 × 700mm
Application Areas
1. Alkaline etching solution recovery
• Titanium Anodes for Alkaline Etching Solution Regeneration and Copper Recovery (Extraction Process)
• Titanium Anodes for Alkaline Etching Solution Regeneration and Copper Recovery (Direct Electrolysis Process)
2. Acidic Etching Solution Recovery
• Titanium Anodes for Acidic Etching Solution Regeneration and Copper Recovery (Membrane Electrolysis Process)
3. Micro-etching Solution Recovery
• Titanium Anodes for Micro-etching Solution Regeneration and Copper Recovery
• Titanium Anodes for Copper Extraction from Micro-etching Solution
• Titanium Anodes for Copper Extraction from Low-Copper Wastewater
Economic Benefits
Using titanium anodes for etching solution recovery offers significant economic benefits:
• Copper recovery rate can reach 90-95%, with a copper purity exceeding 95%
• Energy consumption is 15 KW/h/kg, and current efficiency can reach over 60%
• Cost reduction: Total cost of PCB etching process reduced by over 75%
• Material consumption reduction: Total material consumption reduced by over 95%
Technological Development
With increasingly stringent environmental protection requirements, the application of titanium anodes in etching solution recovery will further expand. The development of new coating materials, optimization of structural design, and application of intelligent control systems will further improve recycling efficiency and economic benefits, driving the technology towards greater efficiency and environmental friendliness.
The titanium anode technology for recovering metal from etching solutions not only solves the environmental pollution problem in the PCB industry but also achieves resource recycling, demonstrating significant economic and social benefits and serving as an important component of green manufacturing.
Application Background
During PCB manufacturing, the etching process generates a large amount of waste liquid containing high concentrations of copper. As etching progresses, the copper ion concentration in the etching solution continuously increases, and the etching solution loses its activity when it reaches 150 g/L. This waste liquid not only wastes resources but also causes serious environmental pollution if not properly treated.
Titanium anodes are mainly used in etching solution recovery to extract metallic copper through electrolysis. Depending on the etching solution system, the following three process routes are mainly adopted:
• Micro-etching solution treatment: Micro-etching solution (Cu₂SO₄ + H₂O₂) → Oxygen-degrading electrolytic cell (decomposition of H₂O₂) → Electrodeposition of copper
• Alkaline etching solution treatment: Alkaline etching solution → Extraction process → Copper sulfate + Sulfuric acid → Electrodeposition of copper
• Acidic etching solution treatment: Acidic etching solution → Ion-exchange membrane electrolysis (electrodeposition of copper) → Tail gas treatment (absorption of chlorine gas)
Titanium Anode Technology
1. Excellent Corrosion Resistance
In high-chlorine, high-acid etching solution environments, titanium anodes do not undergo matrix dissolution, resulting in a significantly longer service life than graphite and lead anodes, capable of stable operation exceeding 4000 hours.
2. High Current Efficiency and Energy Saving Effect
The noble metal oxide coating effectively reduces oxygen and chlorine evolution potentials, improves the current efficiency of copper recovery, and reduces energy consumption. 3. Low cell voltage, low energy consumption, and an oxygen evolution overpotential approximately 0.5V lower than that of lead alloy insoluble anodes.
4. Environmentally friendly and pollution-free.
Titanium anodes do not release harmful metal ions during electrolysis, avoiding secondary pollution and meeting green production requirements. The substrate is reusable, reducing waste generation.
5. Long service life and low maintenance costs.
Typically, they can be used continuously for 1.5-3 years, requiring less maintenance and significantly reducing equipment downtime and maintenance costs. Service life can reach 2-5 years, with a maximum of 5 years.
Product Specifications
Coating Types
• Iridium-tantalum mixed metal oxide coating: Suitable for micro-etching solutions and alkaline etching solutions
• Ruthenium-iridium mixed metal oxide coating: Suitable for acidic etching solutions
• Platinum-iridium-tantalum mixed metal oxide coating, platinum plating, etc.
Technical Parameters
• Current density: 200-1500A/m²
• Operating temperature: 40-60℃
• Electrode spacing: 15mm
• Cu²⁺ concentration: 150g/L
• H₂SO₄ concentration: 10%
Product Forms
• Anode shape: Sheet, plate, mesh, rod, etc.
• Anode size: Maximum up to 2.5m × 1.2m, customizable according to customer's electroplating tank size
• Coating method: Double-sided coating, plate size 1000 × 700mm
Application Areas
1. Alkaline etching solution recovery
• Titanium Anodes for Alkaline Etching Solution Regeneration and Copper Recovery (Extraction Process)
• Titanium Anodes for Alkaline Etching Solution Regeneration and Copper Recovery (Direct Electrolysis Process)
2. Acidic Etching Solution Recovery
• Titanium Anodes for Acidic Etching Solution Regeneration and Copper Recovery (Membrane Electrolysis Process)
3. Micro-etching Solution Recovery
• Titanium Anodes for Micro-etching Solution Regeneration and Copper Recovery
• Titanium Anodes for Copper Extraction from Micro-etching Solution
• Titanium Anodes for Copper Extraction from Low-Copper Wastewater
Economic Benefits
Using titanium anodes for etching solution recovery offers significant economic benefits:
• Copper recovery rate can reach 90-95%, with a copper purity exceeding 95%
• Energy consumption is 15 KW/h/kg, and current efficiency can reach over 60%
• Cost reduction: Total cost of PCB etching process reduced by over 75%
• Material consumption reduction: Total material consumption reduced by over 95%
Technological Development
With increasingly stringent environmental protection requirements, the application of titanium anodes in etching solution recovery will further expand. The development of new coating materials, optimization of structural design, and application of intelligent control systems will further improve recycling efficiency and economic benefits, driving the technology towards greater efficiency and environmental friendliness.
The titanium anode technology for recovering metal from etching solutions not only solves the environmental pollution problem in the PCB industry but also achieves resource recycling, demonstrating significant economic and social benefits and serving as an important component of green manufacturing.
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