2013/1/17 19:52:26
Sand With the development of science and technology, the understanding of the material crushing has also made great progress, huge particulate materials using a variety of different crushing methods, the product of a few microns can be obtained, in order to adapt to a variety of process requirements.
In industry, widely used material crushing broken mechanical force, main squeeze, split, broken, broken, grinding and impact crusher. Non-mechanical force crushing has not yet been used in large-scale industrial production.
A crushed: the material on the surface between the two extrusion force, due to the the material compressive stress reaches the compressive strength limit broken.
B split pieces: the material on a plane and between the teeth, when pressure is applied, the tensile stress in the material, its tensile stress reaches the tensile strength limit, splitting along the force direction.
Break: C material placed between the surfaces of the teeth of the two belt, after the pressing force is applied, the bending stress to the material bending strength limit, then the material to be broken.
The impact crushers D: material impact and crushing told rotation. This method can be used a variety of ways to achieve. Urging momentary action deformation late extended to the respective parts of the impactor, the impact at only generate considerable local stress, broken along the interior of micro-cracks. Dynamic load crushing effect than static load.
Attritor: E-material on the two relative movement between the work surface, while applying a shear force of the pressure box, the shear stress generated in the material reaches its shear strength. Limited, the broken material.
In fact, a variety of stone crusher is in the process of crushing materials are concentrated the result of the combined effects of the broken way, but which will be the main force to a one or two ways, both other broken. Due to a variety of materials materials mechanical properties vary greatly, so the crusher urging and mechanical properties of materials should adapt in order to obtain a good crushing effect. For various hardness of materials using impact crusher with the broken broken more appropriate, such as grinding broken, badly worn parts; brittle materials, chipping, bent and crushed broken favorable grind fine powder will increase the product; for toughness and sticky larger material more appropriate way of grinding and chipping.