Everyone in the industry should know that there are many kinds of solid waste. For different solid waste, the degree of crushing difficulty is different. The degree of crushing difficulty is usually measure by mechanical strength or hardness. Benteng Machinery based on years of experience, summe up as the following views:
1. Mechanical strength
The mechanical strength of solid waste refers to the resistance of solid waste to crusher, and is often express by the compressive strength, tensile strength, shear strength and bending strength measur under static load. The compressive strength is large, the shear strength is second, the bending strength is small, the tensile strength is small. Generally, the compressive strength of solid waste is measure as the standard: the compressive strength greater than 250MPa is hard solid waste; 40? 250MPa is medium hard solid waste; Less than 40MPa is soft solid waste. The greater the mechanical strength of solid waste, the more difficult crusher. The mechanical strength of solid waste is relate to its particle size. The macroscopic and microscopic cracks of waste particles with small particle size are smaller than those with large particle size, so the mechanical strength is higher and crushing is more difficult.
The hardness of solid waste refers to the ability of solid waste to resist external mechanical intrusion. Generally, the harder the solid waste is, the more difficult it is to break. The hardness of solid waste can express in two ways. One is to determine the hardness of minerals. The hardness of minerals can be divided into ten mohs scales.