Alkaline refractory heat storage products with partially preformed reactive magnesia as the main crystalline phase. The main mineral composition of thermal storage brick and magnesia carbon brick wholesale is periclase, spinel and a small amount of silicate. The particles are opaque, spinel is fully developed in the periclase, and the matrix part is metasoluble. Between the crystals is a low porosity product with a direct combination of periclase-pre-reacted magnesite. Product composition is uniform, stable performance, high thermal conductivity, super hot melt ratio, load softening temperature and high temperature mechanical strength, strong resistance to alkaline slag chemical attack.