Roasting sand (modified sand) is produced by subjecting our company's high-quality silicon sand to multiple high-temperature boiling and back-firing processes, resulting in full phase expansion of the sand grains and deep activation of the particle surface. It boasts characteristics of a highly clean particle surface, low loss on ignition, low gas evolution, and low expansion at high temperatures. This allows for a significant reduction in the amount of binder added, effectively ensuring casting dimensions and precision, and improving the quality and yield of finished castings.

Our calcined sand, produced through numerous processing procedures, offers high-quality products. It is widely used in the mold-making and core-making processes for automotive engine blocks, bearings, brake discs, and other castings, as well as in the manufacturing of coated sand. Our calcined sand is priced competitively and boasts excellent quality.