Fused calcium aluminate (pre-melt aluminum calcium slag) is mainly used for lf furnace, oxygen and other impurities in the molten steel, it can reduce the harmful elements and impurities in steel and appliesr is made by the cylinder, bearing devices, with a gear wheel bearing device, gear, activities kiln head, kiln seals, combustion devices and other components, is a production of calcium aluminates powder technology by crushing, drying, milling, rotary kiln calcining, grinding. The has a simple structure to simplify the steps to improve product quality, reduce costand , easy to operate , easy to control of the production process.