Abstract: In order to meet the process requirements of preparing building materials from tailings of a molybdenum mine in Jilin Province，the intermittent continuous grinding process by tower mill is carried out to meet the core index requirements of maintaining the same concentration after regrinding of the raw ore and increasing the fineness to -0.045 mm80%. Through the system industrial debugging test，the indus⁃ trial feasibility and practical operation stability of the grinding process are verified.The practice results show that the operation indexes of the whole grinding system are in line with the on-site production specifica⁃ tions，which can accurately adapt to the pre-process requirements of the building materials utilization of mo⁃ lybdenum tailings，and ensure that the regrinding product indexes fully meet the technical standards for the preparation of subsequent building materials.It provides a typical engineering example for the populariza⁃ tion and application of tower mill in the field of pressurized steam building materials，and provides a new idea for energy saving，consumption reduction and process upgrading in this field. It has important reference value for the comprehensive utilization of similar mine resources and the innovation of grinding process.

Key words: tower mill, intermittent continuous grinding process, molybdenum tailings, pressurized steam process, building materials