Usually we only know that the hardness of sandblasted quartz sand is very high, the hardness is Mohs 7, but how to define and test the specific Mohs 7 of quartz sand? The following is a detailed analysis of the hardness of quartz sand for our customers.
　　The main component of quartz sand is SiO 2. Its main characteristics are hardness and wear resistance. Scientifically, the definition of hardness is the ability of material to resist external objects from pressing into its surface. In fact, the hardness of quartz sand depends on the silicon content of quartz sand, the internal structure of quartz sand and its main components. According to the different testing methods, the hardness of quartz sand depends on the silicon content of quartz sand, the internal structure It can be divided into scratch hardness, indentation hardness and rebound hardness.
　　The first method is to take large grain quartz sand as raw material and lay it flat on the platform. The sharp end of iron and other metals can scratch the surface of quartz sand. The Mohs hardness of iron is 5. If the iron bar leaves deep scratches on the surface of quartz sand, the quality of this kind of quartz sand is unqualified, because the hardness of quartz sand is 7, corresponding to the iron ware. Quartz sands with no marks or lighter scratches on the surface of quartz sands are qualified products.
　Secondly, the surface of quartz sand can be extruded by a sharp object with a certain load. The quality of quartz sand can be determined by the depth of the hard material pressed into the quartz sand. In addition, because of the brittle and non-cleavage nature of quartz sand, when quartz sand is crushed or broken by other hard objects, it will break into small particles of quartz sand, but will not become powder.