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As we all know, as long as the abrasive wheel is composed of abrasive, phenolic resin and mesh, the abrasive of abrasive wheel can be roughly divided into five kinds: Aluminum oxide, white aluminum oxide, zirconium aluminum oxide, ceramic  aluminum oxide and silicon carbon . Moreover, the quality of these five abrasives is in order from high to low.

Aluminum oxide common name also known as emery, is made of bauxite, carbon materials, iron filings three kinds of raw materials in the arc furnace after melting and reduction of the brown artificial corundum, so that is this name. It is the most basic abrasive, because of its good abrasive performance, a wide range of application, cheap, has been widely used. The outstanding characteristic is that the crystal size is small and impact resistant, because of processing and crushing by self-grinding machine, the particles are mostly spherical particles, the surface is dry and clean, easy to bond. zirconium aluminum oxide as raw material in the arc furnace by high temperature smelting above 2000℃, It has good melt erosion resistance. As a kind of advanced abrasive, it can produce high-performance heavy load grinding wheel, and has good abrasive effect on steel, cast iron, heat-resistant steel, and various alloy materials. In addition, That also is a kind of high-grade refractory material, which is the ideal material for making high performance sliding nozzle and immersion nozzle, and grinding wheel, and can also be used to make glass melting kiln zirconium brick. White aluminum oxide is a kind of artificial abrasives, with industrial aluminum oxide powder as raw material, suitable for the manufacture of ceramics, resin consolidating abrasives and grinding, polishing, sandblasting, precision casting (investment casting special corundum), etc. It can also be used for the manufacture of senior refractory materials.

(From left to light are Aluminum oxide, white aluminum oxide, zirconium aluminum oxide).Ceramic aluminum oxide belongs to the sintered abrasive, grain size is very small, only 100 ~ 500 nm, which is only common corundum abrasive grain crystal size of one percent, a 46 # size of ceramic corundum abrasives contain hundreds of millions of grain, made of ceramic corundum abrasive tool has long life, good self-sharpening, high cutting efficiency, that is not easy to burn the characteristics of the work piece. Silicon carbon is the most widely used, the most economic one, can be called gold steel sand or refractory sand. Chinese industrial production of silicon carbide is divided into black silicon carbide and green silicon carbide two kinds, are hexagonal crystals used to make high-grade refractory, heat resistant shock, small volume, light weight and high strength, good energy saving effect. Silicon carbide due to stable chemical properties, high thermal conductivity, small thermal expansion coefficient.

(From left to light are ceramic aluminum oxide and silicon carbon).Of course, more than the above five kinds of abrasive, there is a single crystal corundum is not very commonly used, the disadvantage is higher production cost, lower output, so the price is relatively high. Generally speaking, what we know more is the five kinds of abrasives mentioned above.

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