Mining & Processing

How Bismuth Is Mined and Processed

Bismuth (Bi) is a specialty metal with global annual production of approximately 20,000 tonnes, primarily from China and Vietnam. Typical ore grades range from Byproduct - typically <0.5%.

Mining Methods

Bismuth is extracted through the following methods, selected based on deposit type and geology:

• Byproduct of lead and copper smelting
• Byproduct of tungsten mining

Ore Types and Mineralogy

The principal ore types and mineral sources for Bismuth include:

• Bismuthinite - Bi2S3
• Native bismuth
• Bismite - Bi2O3

Processing and Beneficiation

Following extraction, Bismuth ore undergoes the following processing stages:

1. Electrolytic refining from lead bullion
2. Kroll-Betterton process
3. Precipitation from copper refinery solutions

Environmental and Regulatory Considerations

Mining and processing of Bismuth must comply with environmental regulations governing water use, tailings management, emissions, and land rehabilitation. Increasingly stringent environmental standards are raising production costs but also driving innovation in cleaner extraction technologies. The social license to operate and community engagement have become critical factors in project development, particularly in China where 65% of global production is concentrated.