Used primarily in refractory materials for high-temperature applications such as furnaces and kilns due to its excellent resistance to thermal shock and slag corrosion. Common in cement formulations for rapid setting and strength development, especially in cold weather or underwater construction. Also utilized in wastewater treatment to control phosphate levels and reduce odor. Found in specialty cements for dental and medical applications because of its biocompatibility and dimensional stability. Plays a role in the production of aluminum and in foundry industries as a slag conditioner.