Failure studies on the support of rotary kilns and their thermal effect

The main goal for this work is rotary kiln misalignment and crank shaft features study for cement plants. This kiln preventive maintenance study is constructed about the initial parameters method, which is programmed by C ++ visual studio language. This method simulates tolerated overload like ratio between generated forces and support static efforts. A due to misalignment overload equal to 10.0% maximum static load can be tolerated. Firstly, a loads and displacements set of experimental measurement was realized on supports without any materials product. Then, for the best stiffness matrix reality approach, we modeled the ferrule and the refractory wall like a beam shape which has simple supports. We compared the overload and misalignment initial parameters method results with those obtained by experimental tests. Concerning the rotary kiln thermal conductivity study, we validated the finite elements models simulating the kiln behavior at work. A thermal gradient experimental measurements set was done while kiln was in work, and then we validated the study with the finite elements code. This later was programmed with the FORTRAN language. In another contest, the kiln deformability mechanical tenure and eccentricity was realized in hot conditions. The ferrule and refractory wall numerical simulation validation by finite elements method was elaborated using PATRAN/NASTRAN software. To approach the real kiln behavior, the FEM results are compared with those obtained by the experimental tests.