What are the properties, uses and characteristics of emery
Emery - hexagonal crystal
Silicon carbide produced by the reaction of silica and carbon in clay at high temperatures .
The hardness of silicon carbide is second only to diamond, boron carbide and cubic boron nitride, ranking fourth among inorganic materials. At present, high-density silicon carbide can be produced through hot pressing sintering. It has high strength and good oxidation resistance, and does not deform at high temperatures. It can be used as turbine blades on high-temperature gas turbines, as wear-resistant sealing materials, and as nozzles for rocket tail nozzles and lightweight components. Bulletproof supplies, etc.
Corundum, also known as pure emery, is a colorless crystal. The density and hardness are very high, about 9.5 degrees on Mohs scale. Generally, they are colorless powdery particles. After grinding, it can be used as abrasive powder, polishing paper, and friction surfaces of grinding wheels and grindstones. It is made by placing sand and an appropriate amount of carbon in an electric furnace to intensify heat.
Natural emery, also known as garnet, is a silicate mineral. Abrasive materials made through hydraulic sorting, mechanical processing, screening and classification. It has a long history of production and use. In ancient my country, there were historical examples of using emery to grind crystal glass and various jade. In the 1840s, it was exported to Asia.
Classification of emery
It is divided into three categories: coarse mesh, medium mesh and fine mesh. Among them, the coarse mesh is black and red, the middle mesh is light red, and the fine mesh is red and white. The various mesh numbers have uniform particle sizes and uniform particle shapes. They are called angular crystals with sharp edges and high grinding power.
For the stone industry to grind marble and other soft materials.
Glass industrial grinding glass burrs, television picture tubes, optical equipment, lenses, prisms, watch glass, etc.
Industrial sandblasting, rust removal and grinding of metals. It is used for grinding offset plates in the printing industry, and processing molds, leather, sandpaper, etc. in light industry.
The grinding force of natural emery is slightly lower than that of electric furnace white corundum, but its toughness is strong and it has the characteristics of shell-like segments. Its advantages are that the grinding parts have high smoothness and few and shallow sand marks. The grinding surface is fine and even, which can improve product quality and is the unique feature of this product. The grinding time of natural emery is short, the efficiency is high, and the price is low, which can make up for the shortcomings of short life.