PRCO America Inc. is a wholly owned member of the Puyang Refractories Group. We are the eighth largest producer of refractory for all high temperature applications, and we are self-sufficient in all major refractory raw materials. We mine, process, fuse and export Magnesia of every type: Caustic calcined, light burned, dead burned, fused and large crystal fused; we produce tabular alumina and a full range of alumina magnesia spinels; and we mine and export bauxite. Our MgO is available in purities from 88% MgO to >99%. We have 98 Grade MgO that has a very high lime: silica ratio, lowest FeO and zero detectable boron or chlorine. In addition to supplying refractory producers around the world, we also supply high purity MgO as a key ingredient to make the batches for high strength glass and as an additive to fortify fibers for fire retardation.