foundry chromite sand for refractory and casting materials

Foundry chromite sand is a natural process products of chromite through the broken screen classification, its main chemical composition of Cr2O3, this sand heated volume stability, high thermal conductivity, not only when in contact with molten metal has the very good resistance to basic slag, not with ferric oxide and other chemical reactions, and itself has the characteristics of the solid phase sintering, can be a very good prevent the infiltration of molten metal, avoid to produce adhering sand defects. advantages: 1. with excellent chilling characteristics, this characteristic does not reduce the thermal cracking, but can affect the temperature gradient, promote directional solidification without the use of cold iron. 2. Chromite is inert and does not react with other metal oxides. It is not wetted by manganese steel water. Chromite can be successfully used in manganese steel castings. 3. Linear expansion is small, and linear expansion is a factor that may cause sand inclusion in castings, so it may be used to mix wet sand mold for large castings. Application: 1. Casting materials 2. Refractory materials 3. Modelling 4. The filling 5. Drainage 6. Sand blasting and rust removal size: AFS30-35 AFS35-40 AFS40-45 AFS45-50 AFS50-55 AFS55-60 AFS60-65 Cr2O3 ≥46.0% SiO2 ≤1.0% FeO ≤26.5% CaO ≤0.30% MgO ≤10.0% Al2O3 ≤15.5%