Chapman Flux Powder for Smelting & Assaying Gold Silver Electronics Rock Ore Blacksands

Professional-grade flux powder designed for precious metal recovery. Chapman Flux is engineered to maximize metal recovery, create clean separation of impurities, and deliver consistent results for fire assay and smelting operations.

Applications & Use Cases

• Fire Assay Operations: Ideal for cupellation and fusion processes in laboratory assaying of gold and silver content
• Ore Processing: Effective for processing hard rock ore, sulfide ores, and oxidized materials
• Black Sand Concentration: Optimized for recovering fine gold from placer deposits and black sand concentrates
• Electronic Waste Recovery: Designed for precious metal extraction from circuit boards, connectors, and electronic scrap
• Jewelry Scrap Refining: Perfect for processing karat gold scrap, sterling silver, and mixed precious metal materials
• Mining Concentrates: Suitable for small-scale mining operations and prospecting sample analysis

Technical Advantages

• Creates fluid slag for clean metal separation
• Reduces oxidation losses during high-temperature processing
• Consistent formulation ensures reproducible results
• Compatible with standard fire assay and smelting equipment
• Made in USA to professional laboratory standards

Frequently Asked Questions

What temperature should I use with Chapman Flux?
Typical smelting temperatures range from 1800-2200°F (980-1200°C) depending on your material. For fire assay cupellation, maintain 1650-1750°F (900-950°C).

How much flux do I need per assay?
Standard fire assay ratios are 3-4 parts flux to 1 part ore sample. For a 30g assay charge, use approximately 90-120g of flux mixture.

Can I use this for both gold and silver recovery?
Yes, Chapman Flux is formulated for precious metal fire assay and works effectively for both gold and silver recovery operations.

What crucible material works best with this flux?
Use clay-graphite or ceramic crucibles rated for high-temperature smelting. Magnesia cupels are recommended for the cupellation stage.

Is this suitable for small-scale prospecting?
Absolutely. Many prospectors use Chapman Flux for testing black sand concentrates and ore samples in portable propane furnaces.

What safety equipment do I need?
Always use heat-resistant gloves, safety glasses, and work in a well-ventilated area. Avoid breathing fumes during high-temperature operations.