Starch Depressant (Iron Ore Grade)
CAS Number: 9005-25-8
Modified corn or cassava starch is used as a selective depressant for iron oxide minerals (hematite, magnetite) in reverse silica flotation circuits. The starch adsorbs preferentially on iron oxide surfaces, preventing their flotation with cationic amine collectors while allowing silica and silicate gangue to be floated away. Starch depressant is the cornerstone reagent in the Brazilian iron ore industry and is widely adopted in iron ore beneficiation plants globally.
Technical Specifications
| appearance | White to cream powder |
| moisture (%) | ≤14 |
| pH (1% solution) | 6-8 |
| starch content (%) | ≥85 |
Applications
- Iron ore reverse flotation (hematite and magnetite depression)
- Selective depression of iron oxide in mixed oxide ore systems
- Combined depressant with sodium silicate for complex circuits
- Iron ore concentrate quality improvement
- Phosphate ore processing (iron mineral depression)
Key Features
- Highly selective depressant for iron oxide over silicate minerals
- Enables high iron grade concentrates in reverse flotation
- Requires gelatinization with caustic soda for activation
- Renewable, bio-based reagent with good biodegradability
Send Inquiry
CAS Number
9005-25-8
Category
Mining / Flotation ChemicalsAvailability
In StockSample
Dispatched within 5 days
More in Mining / Flotation Chemicals
1,1,3-Triethoxybutane Frother (TEB)
4739-71-3
2-Ethylhexanol (Flotation Solvent / Frother)
104-76-7
2-Mercaptobenzothiazole (MBT)
149-30-4
Activated Carbon (Gold CIP/CIL Grade)
64365-11-3
Anionic Polyacrylamide Flocculant (APAM)
Butyl Diethanolamine Collector (BDEA Complex)
Cationic Collector Complex (Quaternary Ammonium Type)
Cationic Polyacrylamide Flocculant (CPAM)