Crushers are one of the main equipment used for reducing size in metallurgical, mechanical, and other similar industries. They exist in various sizes and capacities which range from 30 tons/hr. to 1000 tons/hr. They can be classified based on the degree to which they can fragment the starting material and the way they apply forces. Based on the mechanism used crushers are basically of three types; namely, Cone crusher, Jaw crusher, and Impact Crusher. The main objective is to design impact stone crusher. Impact stone crusher involves the use of impact rather than pressure to crush materials. The material is held within a cage, with openings of the desired size at the bottom, end or at sides to allow crushed material to escape through them. Impact stone crusher is used with soft materials, medium to hard stones and medium hard metallic ores. The principles used for impact loading is the time for the natural frequency of the body is much greater than with the time for applying force on materials. Since the hammer is rotating at a very high speed, the time for which the particles come in contact with the hammer is very small, hence impact loading is applied. The shaft is considered to be subjected to torsion and bending.
Keywords: Crusher, Aggregates, Impact loading, Mathematical modeling, Material selection, Detail design
Author: NDIKURYAYO Jean Damascene