Superfine earthy graphite powder

The degree of metamorphism of earthy graphite is high-quality microcrystalline graphite, most of which are graphite carbon, the color is rigid gray, metallic luster, soft, Mo color hardness 1-2, specific gravity 2-2.24, stable chemical properties, not subject to strong acid Alkali influence, less harmful impurities, low iron, sulfur, phosphorus, nitrogen, molybdenum, hydrogen content, high temperature resistance, heat transfer, electrical conductivity, lubrication, and plasticity. Widely used in casting, painting, batteries, carbon products, pencils and pigments, refractory materials, smelting, recarburizers, destined Protective slag and other specifications: divided into "WT"-iron requirements (commonly known as "electric carbon"), "W"-two major categories of iron-free requirements (commonly known as "casting"). The main products are graphite balls, graphite powder, graphite particles, and graphite sand, which are divided into 65, 70, 75, 78, 80, and 80 according to the fixed carbon content. There are 8 grades of 83, 85, 88, graphite powder, fineness is divided into 45, 75, 150um (equivalent to 325 mesh, 200 mesh, 100 mesh respectively)

In the foundry industry, graphite is coated on a solid surface to form a firm and smooth film. This is the good coating performance of graphite, and it is a good casting release agent. The graphite powder commonly used in casting has crystals. Graphite powder (flake graphite powder) or cryptocrystalline graphite powder (earth graphite powder, also known as microcrystalline graphite powder, black lead powder). So far, many small township factories that produce thin-walled small parts by hand molding do not add coal powder to the molding sand, but use a soft brush to brush the surface of the green sand mold with earthy graphite powder, and the surface of the casting is quite smooth. Although graphite powder does not form bright carbon when casting molten iron, the wetting angle of graphite to molten iron is much greater than 90°, that is, the sand mold is not wetted by molten iron. Moreover, the pores on the surface are blocked by the soil graphite powder, and the molten iron is not easy to penetrate and penetrate into the sand grains, which can prevent the casting from sticking to sand and improve the smoothness of the casting surface. Graphite powder has a good lubricating effect, which improves the compact and fluidity of the molding sand, reduces the air permeability, reduces the ejection resistance of the sample, and improves the molding performance of the molding sand. In the foundry industry, graphite is coated on a solid surface to form a firm and smooth film. This is the good coating performance of graphite, and it is a good casting release agent. The graphite powder commonly used in casting has crystals. Graphite powder (flake graphite powder) or cryptocrystalline graphite powder (earth graphite powder, also known as microcrystalline graphite powder, black lead powder). So far, many small township factories that produce thin-walled small parts by hand molding do not add coal powder to the molding sand, but use a soft brush to brush the surface of the green sand mold with earthy graphite powder, and the surface of the casting is quite smooth. Although graphite powder does not form bright carbon when casting molten iron, the wetting angle of graphite to molten iron is much greater than 90°, that is, the sand mold is not wetted by molten iron. Moreover, the pores on the surface are blocked by the soil graphite powder, and the molten iron is not easy to penetrate and penetrate into the sand grains, which can prevent the casting from sticking to sand and improve the smoothness of the casting surface. Graphite powder has a good lubricating effect, which improves the compactness and fluidity of the molding sand, reduces the air permeability, reduces the ejection resistance of the sample, and improves the molding performance of the molding sand.

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Product Categories : Graphite Powder