Ground Cullet uses, suppliers
Posted On Thursday, September 25th, 2008 By grou
Chemical composition of ground cullets
There are no free elements in UGC cullet. All the oxides are chemically combined in this inorganic product of the fusion that took place in the original melting process. A typical chemical analysis is as follows:
SiO2 72.50%
Al203 .16%
MgO 3.65%
So3 .39%
Fe2O3 .20%
CaO 9.18%
Na2O 13.20%
K2O .12%
Posted On Wednesday, September 24th, 2008 By grou
Typical characteristics
* Hardness 5.5 to 6.5 (Moh).
* Specific gravity 2.50.
* Bulk denisty 75 lbs per cubic foot
* Sharp angular yet irregular shapes
* Inert to all chemicals except hydrofloric, fluosilicic and phosphoric acids and hot, strong alkaline solutions.
* High tensile and structural strength, semi-friable.
* Fracture – cochoidal, angular, irregular.
* Pathological effects – none, inert.
* Color – white or mixed
* Transparency – translucent, opaque or transparent.
* Melting Point – softening point 730° Centigrade, liquid 1500° Centigrade.
* Magnetism – none
* Electrical Conductivity – lowest of any common material Less than 10 mho/cm. Considered to be dielectric.
* Thermal conductivity – low.
* Continuous upper use temperature 120° Centigrade.
* Noncombustible.
* Non-toxic.
* Lustre – vitreous.