Precious Metal Refining System

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Precious Metal Refining System

High-Purity Refining Systems for Gold, Silver & Platinum Group Metals

The Precious Metal Refining System is a specialized glass-based process system designed for the recovery, purification, and refining of noble metals such as gold, silver, platinum, palladium, and rhodium. The system is widely used in jewelry manufacturing, electronic scrap recycling, research laboratories, and small-to-medium refineries requiring high-purity metal output with safe and controlled chemical processing.

Precious Metal Refining System – Overview

The Precious Metal Refining System is engineered using borosilicate glass 3.3 reactors, scrubbers, and filtration modules, allowing operators to carry out chemical leaching, selective precipitation, filtration, and metal recovery under visual monitoring.

The system supports batch and semi-continuous refining operations, making it suitable for Aqua Regia-based processes, hydrazine precipitation, and other chemical refining routes. Its chemically inert glass construction prevents metal loss and contamination, ensuring maximum recovery and purity.

System Construction & Configuration

Operating Mode

• Batch or semi-continuous chemical refining
• Operation under fume extraction & scrubbing
• Designed for safe handling of corrosive reagents

Typical Refining Processes

• Metal dissolution (Aqua Regia / nitric systems)
• Selective precipitation
• Solid–liquid filtration
• Drying and metal recovery
• Final purification

Materials of Construction

• Borosilicate glass 3.3 (Duran / Pyrex equivalent)
• PTFE wetted parts
• Corrosion-resistant alloy frames
• Smooth, non-absorptive surfaces to prevent metal loss

Borosilicate glass is chemically inert and does not absorb precious metals, ensuring maximum yield.

Capacity Range

• Laboratory scale – few hundred grams per batch
• Pilot scale – multi-kilogram refining
• Custom-designed systems based on process chemistry and throughput

Utility Requirements

• Heating mantle or controlled heating source
• Cooling water for condensers
• Vacuum / fume exhaust system
• Optional agitation and filtration drives

Safety & Environmental Features

• Sealed system design
• Glass scrubbers for toxic NOx and acid fumes
• Visual monitoring of reactions
• Controlled off-gas treatment
• Reduced operator exposure to hazardous chemicals

Aqua Regia Refining Applications

We supply custom glass assemblies for Aqua Regia-based precious metal refining, where glass vessels are used as:

• Dissolution reactors
• Precipitators
• Separators
• Filtration units

These systems are suitable for gold, silver, and platinum recovery using Aqua Regia / Hydrazine processes.

Auxiliary Equipment Available

Glass Scrubber Unit

• Designed to eliminate NOx and acid fumes
• Essential for gold refining with Aqua Regia
• Engineered for adequate absorption capacity

Glass Filter Unit (Mobile)

• Mounted on wheels for easy handling
• Used for precious metal recovery from solutions

Nitric Acid Boiling Apparatus

• With glass condenser
• Suitable for laboratory testing
• Optional vacuum processing tubes (VPT-111) for sample withdrawal

Metals We Refine

• Gold refining – jewelry, scrap, electronic waste
• Silver refining – industrial scrap, silverware
• Platinum refining – industrial and jewelry sources
• Other precious metals – palladium, rhodium

Why Choose Our Precious Metal Refining Systems

• High purity metal recovery
• No metal absorption by glass
• Transparent & visually monitored process
• Custom-engineered equipment
• Long service life & easy cleaning
• Safe handling of corrosive chemicals

Consultation & Custom Design

Our team of chemical and process engineers supports process design, equipment sizing, and system customization based on your refinery’s specific requirements.

Contact us today to discuss your precious metal refining application and system configuration.