Sodium Fluorosilicate (Fluorite Depressant)
CAS Number: 16893-85-9
Sodium Fluorosilicate is an inorganic reagent used in mineral flotation as a depressant and pH modifier, particularly effective in scheelite and fluorite separation circuits. It selectively depresses fluorite in the presence of scheelite, enabling enrichment of scheelite concentrate with reduced fluorite dilution. Sodium Fluorosilicate is also used in the glass industry and as a hardening agent for concrete, providing multiple application pathways for mining chemical suppliers.
Technical Specifications
| appearance | White crystalline powder |
| moisture (%) | ≤0.3 |
| pH (1% solution) | 3.0-4.5 |
| Na2SiF6 content (%) | ≥98 |
Applications
- Fluorite depression in scheelite flotation separation
- Selective depression of calcium fluoride gangue minerals
- Combined depressant with sodium silicate in scheelite circuits
- pH adjustment in non-sulfide mineral flotation
- Glass industry ceramic application (dual-use chemical)
Key Features
- Selective depressant for fluorite in scheelite separation circuits
- Fluoride ion release modifies mineral surface chemistry for selectivity
- High purity grade for reliable and reproducible flotation performance
- Stable crystalline powder for safe handling and storage
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CAS Number
16893-85-9
Category
Mining / Flotation ChemicalsAvailability
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