Sodium Cyanide (Flotation Depressant Grade)
CAS Number: 143-33-9
Sodium Cyanide is a powerful depressant for sphalerite and pyrite in differential sulfide flotation, and serves as the primary leaching agent in gold and silver cyanidation processes. In flotation, it forms stable cyanide complexes with zinc and iron on mineral surfaces, preventing xanthate adsorption and enabling selective copper or lead flotation. Its use is highly regulated and requires strict safety management systems, with comprehensive training and emergency protocols mandatory.
Technical Specifications
| appearance | White crystalline briquettes or powder |
| moisture (%) | ≤0.5 |
| NaCN content (%) | ≥98 |
| pH (1% solution) | 11-12 |
Applications
- Sphalerite and pyrite depression in Pb-Zn and Cu-Pb flotation
- Gold and silver cyanidation leaching (CIL/CIP processes)
- Selective copper flotation from polymetallic ores
- Combined use with zinc sulfate for enhanced sphalerite depression
- Separation of copper minerals from pyrite in bulk flotation
Key Features
- Most effective depressant for sphalerite and pyrite at alkaline pH
- Dual function as flotation depressant and gold cyanidation leachant
- High purity briquette form reduces dust hazard during handling
- Widely adopted in global differential flotation of Pb-Zn and Cu ores
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CAS Number
143-33-9
Category
Mining / Flotation ChemicalsAvailability
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