Possibilities of Implementing Bimetallic Hammer Castings in Crushing Industries

Numerous industries involve impact crushing of raw material in their processes. Crushing is performed by interaction between raw material witch size is reduced during this process and equipment or parts that crush. Some of the biggest and most important clients of crushing and milling equipment are industries like cement plants, mines, open pits, coal fired thermal plants, recycling and shredding industries and rock processing plants. In the crushing process, size of particle is reduced by fracturing them. When the local strain energy exceeds a critical level, which is a function of the material, fracture occurs along lines of weakness and the stored energy is released. Some of the energy is taken up in the creation of new surface, but the majority of it is dissipated as heat. The force applied may be compression, impact, or shear, and both the magnitude of the force and the time of application affect the extent of grinding achieved. For efficient grinding, the energy applied to the material should exceed, by as small a margin as possible, the minimum energy needed to rupture the material. Excess energy is lost as heat and this loss should be kept as low as possible. Wear is a phenomenon caused by moving surfaces and their interaction, which cause material loss from the surface. Depending on the type of raw material (its hardness and particle size), desired reduction rate and capacities optimal process of resizing can be chosen. Operating costs of crushing plant is in correlation with consumed energy which, further on, depends on ratio of particle size before and after crushing process. Besides that, reliability of crushing plant and high productivity with lower maintenance costs greatly depends on type and quality of crushing elements.