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General knowledge of the hardness and Mohs hardness of ultrafine grinding materials

Material hardness can be used as an indirect evaluation indicator of the wear resistance of a material, ie, the higher the hardness value, the better the wear resistance is. Under normal circumstances, the greater the hardness of the material, the more difficult to crush, that is, the greater the energy consumed by ultrafine mill, but some material structure is not uniform, with defects and cracks, and some materials are anisotropic, ie, crushing in different directions Different properties, therefore, the hardness of the material wear on the machine wear parts, such as Jaw Crusher plate, impact hammer crusher and counterattack liner, hammer crusher hammer, roller type Crusher roll skin, etc., but often because of the brittle but it makes it easy to crush; conversely, the hardness of the material may be difficult to crush because of its toughness. Therefore, different crushing methods should be adopted for the characteristics of specific materials. Mohs hardness: The common ten kinds of minerals are used as the standard for mutual scratching to distinguish between hard, soft, soft, and traditionally used in mineralogy or gemology, they all use Mohs hardness. Using a scratch method, a pyramid-shaped diamond burr is scratched on the surface of the mineral being tested and scratches are generated. Mohs hardness is conventionally used for mineralogy or gemmology. The hardness of the scratches was measured in ten steps and the Mohs hardness was ten points. Talc, gypsum, calcite, fluorspar, apatite, orthoclase, quartz, topaz, corundum, diamond.

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