Knowledge of characteristics of chromite sand in foundry

Knowledge of characteristics of chromite sand in foundry
1. Chromite has excellent cooling performance. It does not reduce thermal cracks, but can affect the temperature gradient and promote directional solidification without using cold iron.
2. Chromite is inert, so it does not react with other metal oxides. It will not be wetted by manganese steel. Manganese steel castings can be successfully used in chromite sand. If the mold is painted normally and the silicon dioxide content is low, the iron olivine will not react.
3. Chromite sand has a small linear expansion, which is a factor that may cause sand inclusion in castings, so it can be used to mix green sand molds for large castings. 4. Chromite ore is sintered with fine particles to eliminate metal penetration, accompanied by cooling and high residual thermal strength.
5. Chromite sand is universal, it can be used with various joints.
6. Chromite sand has adverse effects on healthy non-silica sand.