Chromite sand, also known as chromite ore sand or Cr Sand, is a mineral product with excellent refractory properties. China’s chrome ore reserves are low, and over 90% of both foundry-grade chromite sand and chemical-grade chromite is imported. Yet, customers in the Asia-Pacific region and other near-ocean regions buy large quantities of foundry-grade chromite sand from China. What are the reasons for this?

Chromite sand is widely recognized as a high-performance refractory material in sand casting, especially for producing high-quality castings (e.g., steel, stainless steel, alloy steel, and large-scale heavy castings). Its advantages stem from its unique physical, chemical, and thermal properties, which address key challenges in sand casting processes. Below are its core advantages of chromite sand for Sand Casting

The IU of chromite sand for casting reflects the degree of uniformity of the particle sizes. IU means Index of Uniformity. A high IU value indicates that the particle sizes of the chromite sand are relatively uniform, while a low IU value means that there is a wide range of particle sizes in the sand.

In the production of heavy-duty mining equipment castings parts, the choice of foundry sand plays a critical role in casting quality. Chromite sand AFS45-55, due to its unique properties, is an ideal choice for these applications. 

Both natural chrome ore sand and olivine sand can be used in the foundry field, but there are great differences between the two. There are several differences between foundry chromite sand and olivine sand.