The Black Silicon Carbide Application

1. What is emery
Among the wear-resistant products, many people do not know much about silicon carbide, and many people think that emery is silicon carbide. In fact, silicon carbide is not only a product of silicon carbide, but also other products. Guangya emery mainly contains the following four products: brown corundum, white corundum, black corundum, silicon carbide.
 
Black silicon carbide
2. Classification of emery
There are many types of emery, if we have to talk about the raw materials, production process and use of emery, we can only give you a rough explanation according to the color of emery.
1) Brown corundum is also known as brown corundum, which is made of bauxite and coke (anthracite) as the main highland materials, and is processed by high temperature smelting in an electric arc furnace. The grinding made of brown corundum is suitable for grinding. All kinds of general-purpose steel, malleable cast iron, hard bronze, etc., brown emery can also be used as advanced refractory material. Brown emery has the characteristics of high purity, dense texture, large packing density, good toughness, etc. The grinding made of brown emery is sharp, low heating rate, high grinding ratio, and less adhesion when used, brown emery is used Used in manufacturing ceramics, grinding and polishing, etc.
2) Black silicon carbide, also known as black silicon carbide, is made of quartz sand, petroleum coke (or coal coke), and wood chips through high-temperature resistance furnace smelting. Black emery contains about 98.5% SiC, black emery has a specific gravity of 3.20-3.25g / cm3, black emery has a hardness of 9.2, and its toughness is higher than green emery. Black emery is used to process glass, ceramics, stone, refractory materials, cast iron and non-ferrous metals And other products.
3) Green emery is also known as green silicon carbide. Like black emery, it is made of quartz sand, petroleum coke (or coal coke), and wood chips through high-temperature resistance furnace smelting. However, green silicon carbide contains more than 99% SiC, the specific gravity of green diamond is 3.20-3.25g / cm3, the hardness of green diamond is 9.2, and green diamond is used for processing cemented carbide, titanium alloy and optical glass.
4) White corundum is also called white corundum. It is made of industrial alumina powder after being melted in an electric arc at a temperature of more than 2000 degrees. It is crushed and shaped, de-ironed by magnetic separation, and sieved into a variety of particle sizes. White corundum texture Dense and high hardness, the particles form a spherical shape, the density is 1.53-1.99g / cm3, the hardness is 9.0, white emery is used to make ceramics, resin consolidation grinding and grinding, polishing, sand blasting, precision casting, etc. white emery is used Manufacture of advanced refractory materials.
 
However, if emery is classified according to its color, we still cannot say that we have a thorough understanding of emery, because emery is also divided into washed emery, natural emery and artificial emery.
 
3. The use of emery
Washed emery is a high-quality sand for denim clothing of washing factory and water cutting industry. Washed carborundum has good self-sharpness, sharp edges and corners, and forms new ridges during continuous crushing. The hardness of the shell-shaped fracture is uniform. The washed carborundum will not cause scratches on all abrasive appliances and objects, and the chemical composition of washed carborundum is stable and has The irreplaceable advantages of other abrasives and synthetic abrasives.
Natural emery is also called "jade", which has strong hardness and good acid and alkali resistance. The appearance of natural emery is red, green and black granular. Natural emery characteristics: strong wear resistance, high melting point, large specific gravity, and stable performance.