Ultrafine vermiculite

Ultrafine vermiculite

It is a set of special craft, which has been developed by the Asia air mine products processing plant, which has been widely used by many experts to demonstrate the application of vermiculite. The fine vermiculite produced by our factory has 300-800 orders, which can be customized according to the needs of the customers, and welcome the customers to negotiate and order.
Main uses:
It is widely used, but its main uses are still building materials. In the 1986 consumption structure of the United States, 52% of the expanded vermiculite, used as slurry and cement premixture and lightweight concrete aggregate, accounted for 40% of the United Kingdom as concrete, wall mud and cement coagulants.
Application areas:
Building: lightweight concrete lightweight aggregate (lightweight wall powder, lightweight mortar)
Heat resistant material, fireproofing board, fireproof mortar and firebrick.
Thermal insulation, thermal insulation, sound absorbing materials, underground pipes, greenhouse pipes, thermal insulation materials, indoor and tunnel mounted, walls and ceilings of public places.
Metallurgy: steel frame coated material, iron making, casting slag removal, high building steel frame coating material, vermiculite bulk material
Agriculture, forestry and Gardens: Gardening golf course lawn, seed preservative, soil conditioner, wetting agent, plant growth agent, feed additive.
Marine fishing industry: erbium fishing
Other aspects:
Adsorbents, filter aid, chemical products and chemical fertilizer active carriers, sewage treatment, seawater oil sorption, cigarette filter, explosive density regulator and so on.
Monoclinic system; a0=0.535nm, b0=0.925nm, c0=n*1.45 nm, beta =97. 07'; Z=2. This is a common lattice constant of the 38 face vermiculite with Mg as the main interlayer cation. The lattice constants of 28 face vermiculite are slightly different. The crystal structure is 2:1 (TOT). In the tetrahedron, the layer charge is replaced by Al instead of Si, which leads to interlayer filling exchangeable cations and water molecules. The water molecules are linked to bridged oxygen on the surface of the structure by hydrogen bonds, and are weakly hydrogen bonded to each other in the water molecule layer. Some water molecules form a coordination eight surface body around the interlayer cation to form a hydrated ion [Mg (H2O) 6]2, which occupies a fixed position in the structure, and some of the water molecules are free. The structural characteristics of vermiculite have strong cation exchange capacity.
Under normal temperature and humidity, the C0 of Mg saturated vermiculite is 1.436nm, and there is a double water molecule layer between the layers, but the water molecular layer is incomplete. After water saturation, the C0 increases to 1.481nm. At this time, the whole layer of water molecules is filled. After partial dehydration of vermiculite by slow heating, the C0 of the vermiculite changed from 1.436 to 1.382nm. With continued dehydration, double layer water molecules will be reduced to single layer water molecules and C0 to 1.159nm. Further dehydration will change to a completely dehydrated structure (c0=0.902nm) and a structure with interphase of monolayer water molecular structure (c0=1.159nm), and its C0 is 2.06nm. After dehydration, the structure is similar to talc, and C0 is 0.902nm.
When ultrafine vermiculite is heated to 500 dehydration, it can absorb water again at room temperature, but it will no longer absorb water when heated to 700 C.