Magnetite is a mineral and one of the main iron ores. With the chemical formula Fe3O4, it is one of the oxides of iron. Magnetite is ferrimagnetic; it is attracted to a magnet and can be magnetized to become a permanent magnet itself. It is the most magnetic of all the naturally-occurring minerals on Earth.
Properties of Magnetite Powder :
|Appearance||Dark Black Color Powder|
|Specific Gravity||4.5 Min|
|Residue greater than 75 Microns||1.0% Max (%w/w)|
|*Custom Particle Size distribution can be manufactured as per the requirement.|
|Fe%||66% Min (%w/w)|
|Magnetic Content (Dry Method)||95% Min (%w/w)|
|SiO2||3% Max (%w/w)|
Magnetite is an essential part of the “heavy media” process in coal mining. In the form of a very fine powder, it is added to water to form a heavy media slurry that has a higher specific gravity than water alone. When coal from the mine is pulverized and added to the slurry, the heavier waste materials, such as rock particles, will sink and separate from the lighter coal. The heavy impurities are then siphoned from the bottom of the slurry and the light coal is skimmed off the top. Using magnets, magnetite can be easily recovered from the waste and coal streams and then re-used in the coal separation circuit. Recyling the magnetite provides a cost saving to the operator, and is an environmentally conscious method of utilizing this valuable resource. About 90% of the magnetite can be recovered for reuse from the process, but the remaining 10% must be must be replaced. This results in a steady demand for new magnetite. In addition to coal producers, potash producers and diamond mines also use heavy media separation systems.
This is a relatively new market and is based on certain plastic producers’ search for a denser end product. Some plastic products (pipeline cleaning “pigs” for instance) can benefit from added weight. Magnetite can be added as a very fine powder to the plastic mix to increase the weight.
Magnetite is an excellent source of iron for the production of iron-based chemicals like ferric chloride and ferric sulphate, that are used as alternatives to aluminum hydroxide. Aluminum hydroxide is used to help clarify raw water in municipal water purification plants, but concerns about aluminum in drinking water have prompted consideration of alternative chemicals. Other chemical uses include high iron fertilizers, pigments and sediment control products.
Sand and gravel bed filters used by many municipal water treatment plants can realize benefits by using heavier aggregates in the sand bed. The heavier specific gravity of magnetite aggregates allow a more aggressive backwash in the cleaning phase without loss of product, and because magnetite is magnetic it can be easily scavenged back from waste water streams for reuse.
- Other applications include Paints, Magnetic Paints, Friction Materials and Vacuum Insulation Panels.
Packaging : –
- Magnetite Powder is packaged in Super Sacks (Big Bags), In 50 Kgs bags or 25 Kgs Bags.