When sourcing chromite sand, technical purity is paramount. Standard foundry-grade sand should meet the following minimum requirements: Chromic Oxide ( Cr2O3cap C r sub 2 cap O sub 3
: Best for intricate, thin-walled castings requiring high detail.
: Better for large, heavy castings requiring high mold strength.
Most of the world's high-quality chromite sand originates from , which holds nearly half of the global resources. Chromite Sand - Carpenter Brothers, Inc.
) Content : Look for a minimum of . Higher grades (46%+) offer better refractoriness and thermal stability. Silica ( SiO2cap S i cap O sub 2
) Content : Ideally and strictly under 3%. Low silica prevents chemical reactions with molten steel that cause "sand burn" or sticking.
