Refractory ceramic ball with high strength, corrosion resistance, wear resistance,thermal conductivity and thermal capacity, high thermal efficiency, good thermal stability and storage temperature change is not easy to fracture, etc. Refractory ball use in shift converter and reformer in ammonia plant. Refractory ceramic balls are divided into ordinary refractory balls and high alumina refractory balls. Common refractory balls are suitable for converters and converters in the sulfuric acid and fertilizer industries, and high alumina refractory balls are suitable for hot blast stoves, heating converters and other equipment in urea, steel and other industries.