cdocast- Call Us: 008615168765707
- Mail Us: [email protected]
cdocastBuy the most advanced Precious Metal Electrolytic Refining Equipment. Inquiry Now.
Precious Metal Electrolytic Refining Equipment is a widely used method for purifying precious metals, such as gold, silver, and platinum, by passing an electric current through a solution containing dissolved impure metal. The anode (impure metal) oxidizes, releasing metal ions into the electrolyte, while the cathode (pure metal) attracts and reduces these ions, forming high-purity deposits. Impurities either remain in solution or settle as anode slime. This process ensures high efficiency and ultra-high purity (up to 99.99%), making it essential in jewelry, electronics, and industrial applications. Common electrolytes include cyanide, sulfuric acid, or chloride solutions, depending on the target metal.
Silver Electrolysis Process Flowchart
The entire system consists of three main lines:
1.Main Production Line (High Purity Silver)
Crude Silver Granules (Start)➡️1st Electrolysis Cell (Primary Purification)➡️Filtration Cart (Intermediate Filter)➡️2nd Electrolysis Cell (Deep Purification)➡️99.99% Pure Silver (High Purity Product)➡️Casting (Final Ingot/Bar)
2.Resource Recovery Line (Silver Powder)
(From 2nd Electrolysis) ➡️Electrolyte Filtration➡️Reduction Tank (Add Salt / NaCl)➡️Silver Chloride (AgCl) (Precipitate)➡️Add Alkali & Sugar (Replacement/Reduction Reaction)➡️Silver Powder Recovered➡️Casting (Recycled Silver)
3. Eco-Treatment Line (Waste Management)
(From Silver Chloride Tank) ➡️ Wastewater➡️Water Treatment Mixer 1➡️Water Treatment Mixer 2➡️Filter Press (Solid-Liquid Separation)➡️Base Metal Sludge (Solid Waste) & 🌊 Final Effluent (Clean Water)
For more details on gold refining, please click this link to visit the Gold Refining Blog
For more details on silver refining, please click this link to visit the Silver Refining Blog .
If you want to pulverize gold or silver materials into flake for purification, you can click this link to learn about CDOCAST Metal Flake Making Machine
Gold Electrolytic Refining Equipment
Application
| Feature | Aqua Regia Method | Electrolysis Method |
| Process Type | Chemical dissolution | Electrochemical process |
| Chemicals Used | HNO₃ + HCl (3:1 ratio) | Acidic/alkaline electrolyte (e.g., H₂SO₄) |
| Suitable Metals | Au, Pt, Pd | Au, Ag, Pt (varies by setup) |
| Purity Achievable | 99.5%-99.99% | 99.9%-99.999% |
| Speed | Fast (hours) | Slow (days for large batches) |
| Energy Consumption | Low (room temp.) | High (requires electricity) |
| Waste Production | Toxic fumes (NOx, Cl₂), acidic waste | Less chemical waste, metal sludge |
| Safety Concerns | Highly corrosive, toxic gases | Electrical hazards, electrolyte handling |
| Equipment Cost | Low (glassware, fume hood) | High (power supply, specialized cells) |
| Scalability | Suitable for small-medium batches | Better for industrial-scale production |
| Byproduct Recovery | Requires additional steps | Easier (e.g., anode slime collection) |
| Skill Requirement | Moderate (acid handling experience) | High (electrochemistry knowledge) |
1.High Purity – Produces metals up to 99.99% purity (e.g., silver and gold electrolysis).
2.Scalability – Ideal for large-scale operations (e.g., industrial gold/silver refining).
3.Less Chemical Waste – Reduces reliance on acids like aqua regia, minimizing environmental impact.
4.Automation-Friendly – Continuous processing with minimal manual intervention.
CDOCAST Provide 2 Warranty time , and during the warranty time we will be responsible for the all aftersales service & spare parts for free
CDOCAST Provide more value & turnkey Solution to Metal Melting & Casting According to Each Customer
We owe it to each of our customers, CDOCAST adopt world famous brand components to improve our machine working performance.
Inquiry About CDOCAST Precious Metal Electrolytic Refining Equipment
Contact Our Engineer Team
Gold wire, silver wire in the jewelry industry and its electronic industry is very common and important product,Let’s talk about the drawing process of gold and silver wire in detail.
CDOCAST launched a new gold Smelter which is manual tilting, This small coreless induction melting furnaces capable of melting ferrous, non-ferrous, precious metals…..
videos Continuous Casting Machine for precious metals . Click the link you can learn more through the video
Small Upward Continous Casting Machine for silver pipe casting , click to learn more about it
