Customizing Refractory Sand for Ceramic Products Making with Low
Thermal Expansion
1.What is the refractory sand?
The refractory sand is made of kaolin or mullite by high
temperature sintering. The chemical components of mullite are all
chemical substances with strong fire resistance, and their
properties are relatively stable. It mainly includes: alumina,
silica, etc., the content of alumina is between 42% and 46%, and
the content of silica is between 51-53%. In addition, there are
less substances: iron oxide, sodium superoxide, potassium
superoxide, titanium oxide, magnesium oxide, etc.
2.How do we get it ?
The sand is a kind of alumina silicate mullite sand and powder. It
is a series of mullite sand and powder with high aluminum content,
low iron content, low coefficient of thermal expansion, high
refractoriness and stable thermochemical proprities, which are made
of hard clay mineral resources through high-temperature roasting,
crushing, screening, Raymond, iron removal and other machining
processes.
3.Where is it used for?
The products are mainly used in investment casting,especially in
reinforcement layer, gypsum filling V method molding and vacuum
suction casting, as well as refractories for large, medium and
small steel castings, widely used in machinery, aviation, weapons,
metallurgy, petroleum and other industries.
4.Products Technical Index
| Al203 min | Fe2O3 max | SiO2 max | CaO min | MgO min | K2O min | Na2O min | TiO2 min |
| 46% | 0.90% | 50.63% | 0.27% | 0.20% | 0.11% | 0.11% | 0.77%
|
raw ore
15-30mesh 30-50mesh
5.Package
