Foundry chromite sand is popular for Iron, Metal casting process. It is featured for it’s high refractoriness, low volume expansion and high thermal conductivity.
However, as a mineral product, it is hard to judge the quality by eyes. Here we give several aspect to check the foundry chromite sand quality.
It is well known that South Africa chromite sand with a 46% content are primarily used in two industrial applications: ladle tundish nozzle filler and foundry molding sand. As a natural mineral product, chromite sand vary in size after crushing. Seiving with different mesh can get a particle size range that best meets the desired requirements. Generally, the more uniform the chromite sand, the better its performance as ladle well filler sand and casting sand.
South Africa chromite sand is a high-quality chromite resource, classified as metallurgical-grade and foundry-grade depending on its chromium content. Foundry-grade chromite sand from South Afirca is renowned for its high chromium content (typically 45-46% Cr₂O₃), low silica content (less than 1% SiO₂), and excellent high-temperature resistance. It is widely used in industries such as chemical casting and refractory materials. Its application stems primarily from its core properties: excellent high-temperature resistance, chemical inertness, good thermal conductivity, and high specific gravity.
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.
