Disclosed is a process for calcining active blending material involving feeding material outside of a kiln head and the blending material obtained. The process comprises feeding material from outside of kiln head of rotary kiln into inside of kiln hood and to grate cooler, wherein the material is coal gangue, shale, clay, peat, mud and the like which can form active cement component through low temperature calcining, and calcining the material at low temperature. Disclosed also is a cement production apparatus for carrying out the process provided, comprising feeder nose(s) provided on the kiln hood and/or grate cooler for feeding the material.