Research is made on the influence of clinker modular value on rotary kiln capacity, clinker physical property, water reducer compatibility, hydration heat and impact resistance of cement mortar. The results shows that when compared with normal proportion of new dry cement kiln, the reduced clinker heat consumption, improved kiln capacity and decreased clinker strength, especially early strength, are obtained when clinker modular value at KH＝0.90~0.91, SM＝1.95~2.00, AM＝0.95~1.0. But when making concrete with such clinker cement, the concrete provided excellent water reducer compatibility, lower hydration heat and good impact resistance, particularly suit concrete engineering, such as road and airport construction, pipe column products and large volume concrete construction in hot weather.

The decomposing method of multi－body contact system is put forward, which is applied to decompose the large contact system of rotary kiln into the contact system between shell and tyre, between tyre and roller, and between tyre and roller axle. By setting forth contact element at the interference joint, the contact system between roller and roller axle is solved with FEM method, and the mechanical property of roller and roller axle are obtained, which will supply the quantum index for evaluating the mechanical status of roller and axle, and provide basis for the prescient maintenance of rotary kiln. 

This paper introduced various flow patterns of silos, analyzed the influence factors on silo flow patterns, especially the affect by filling method and inserts. It gives a reference on silo design, flow pattern selection and flowability improvement.