This paper shows the calculation formula of size separation, capacity  definition and power equip of high－efficiency cage type  separator both from theoretical and practice.Influence between relating process parameters are clarified which provide a practical method  for correct selection of cage type separator.

This paper has chosen five main components of common grinding aids, which are added during grinding process and added into cement products respectively, to discuss the compatibility between cements containing grinding aids and superplasticizers． Test results show that the phenomenon of incompatibility between cements containing grinding aids added during grinding process and superplasicizers  exsists, but does not between cements containing grinding aids added into cement products and superplasticizers． Through other auxiliary experiments and consulting relevant documents, this paper also discusses the main factors influencing the compatibility between cement grinding aids and superplasticizers preliminarily．

The new top cyclone of Humboldt was synthetically studied in cold model conditions in combination with the parameters of industrial production line. The results indicate that the cyclone have good separation efficiency  due to its gas flow characters, but the gas flow resistance of the cyclone is higher. Its separation efficiency is influenced greatly by gas velocity in it. Separation efficiency will be worse when the clinker capacity is increased evidently. This is proved by the practical production in JY Cement Plant.

This article will mainly analyze the performance experiment of the ?1.5m double rotor inner sifter crusher for cement clinker crushing in which the following findings are established: with higher crushing efficiency, this kind of crusher can guarantee the fineness of product, control the upper limit of particle size, and contribute much to the grinding of following working procedure as well. Thus this kind of new crusher has remarkable effect on energy saving and consumption decreasing.  

This paper first describles the selection of ID fan at Kiln feed from  the reliability,economic and technology. And shows the operation principle and  actual running of self－feedback chopper cascaded drive. Finally, the actual power savings  are given.