The chemical composition of magnetite Fe3O4, crystal is equiaxed oxide minerals, crystals often has octahedron and rhombic dodecahedron, collection of grainy or lumpy. Intact monocrystalline octahedral or rhombic dodecahedron icosahedral, was when rhombic dodecahedron diamond surface of the crystal plane parallel stripes often long diagonal direction. aggregates of dense block or granular Colour iron black, streak black, metallic or semi-metallic glossy, opaque, no cleavage, hardness 5.5-6, specific gravity 4.8-5.3 because it has a strong magnetism, the ancient Chinese stone, also known as Chi, magnets, Kuroishi. is the strongest magnetic minerals, can be permanent magnets attract, the ancient Chinese compass 'Ian' is to use this feature made after oxidation becomes hematite or limonite.
Magnetite media is an essential three-media filter material. It has a filtering speed, interception capability, long life cycle and so on. Magnetite media, the appearance of spherical, high mechanical strength, non- toxic and hazardous substances, the proportion of 4.5g / cm3, the capacity of 2.95g / cm3 British hardness 5.5-5.6. Magnetite filter pipe big resistance for the water distribution system in the three-layer filter usually it anthracite filter media, quartz sand filter fit is better ingredients procedures, backwash is not easy hybrid, improve the supporting layer and the water distribution system has a good adaptation performance, is essential for multi-layer filter media, filtration rate of up to 30 Advantage -40 m / hour. So magnetite is an important filter media products.
In the double-layer (multilayer) Filtration, the magnetite media are essential main filter material, magnetite filter due to the use of the smallest particle size in the double-layer (multilayer), filter filters for water treatment in all acts last check, so if the quality magnetite filter is directly related to water quality final.
In most domestic industrial water treatment, filtration forms are used in the form of pressure filters, pressure filters and filter pressure backwash pressure was relatively large, for use in a major magnetite cushion than litter can be compared with the large backwash pressure. If you use a small proportion of the litter or fail, appear likely to cause filter and litter mixed layer during backwash filter quickly lose filtration.
Magnetite filter for tube resistance water distribution system, three-filter is necessary a filter material, mainly to improve the supporting layer and the water distribution system has a good ability to apply, high strength, fast filter easy to backwash mixed layer. In addition, it addition to iron, manganese, fluoride effect is very obvious.
Magnetite filter physical and chemical indicators:
Analysis Project Test Data
The wear rate of 0.04%
Broken rate 0.05%
A porosity of 47%
Density of 4.6g / cm3;
Bulk density of 2.8g / cm3;
Mohs hardness of 6 degrees
Uniformity coefficient ≤1.8
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