Mine sand, also known as Chromium iron ore sand, is a special sand for casting. It is a natural spinel dominated by chromite. It is broken, ground, and sifted into specified granularity and is suitable for sand in modeling(core). Chromium ore is divided into 2 levels according to chemical composition; Level 1 Cr2O3 ≥ 45 %; Secondary Cr2O3 ≥ 35 %. Chromium ore is mainly used in casting production for large scale castings to prevent the surface of castings from being sticky. Secondly, the grinding powder is used for casting refractory aggregate of paint. Chromium ore is a cold material that can replace part of the cold iron in the shape(core).

Chromium ore for casting is a product processed by the crushing screening process of natural chromite. Its main chemical component is Cr2O3. This kind of sand is stable in heat volume and has high thermal conductivity. It not only has a good anti-alkaline slag effect when it comes into contact with molten metal, but also does not react with iron oxide and other chemical reactions. It also has the characteristics of solid sintering and can well prevent the penetration of molten metal. Avoid sticky sand defects.

The main chemical composition of Chromium ore sand is Cr2O3. This kind of sand is stable in heat volume and has high thermal conductivity. When in contact with molten metal, it not only has a good anti-alkaline slag effect, but also does not react with iron oxide, etc.. The characteristics of sintering, It can prevent the penetration of molten metal and avoid sand defects. It is suitable for raw sand and coatings of various stainless steel, alloy steel and carbon steel.