Carbon and graphite materials are non-metallic solid materials dominated by carbon element, in which the carbon material is basically composed of non-graphite carbon, while the graphite material is basically composed of graphite carbon.For simplicity, carbon and graphite materials are sometimes referred to as carbon materials (or carbon materials).
Carbon products can be divided into graphite electrode, carbon block, graphite anode, carbon electrode, paste, electric carbon, carbon fiber, special graphite, graphite heat exchanger and so on.Graphite electrodes can be divided into ordinary power graphite electrodes according to the allowable current density.High power electrode, ultra high power electrode.According to the processing depth of carbon block can be divided into blast furnace carbon block, aluminum carbon block, electric furnace carbon block, carbon products according to the processing depth can be divided into carbon products, graphite products, carbon fiber and graphite fiber.According to the different raw materials and production process, carbon products can be divided into graphite products, carbon products, carbon fiber, special graphite products.According to ash content, carbon products can be divided into high-ash products and low-ash products (ash content less than 1%).
Carbon steel contains less than 1.35% carbon.In addition to iron, carbon and silicon, manganese, phosphorus, sulfur and other impurities within the limits, carbon steel does not contain other alloying elements.Carbon steel performance depends mainly on carbon content.With the increase of carbon content, the strength and hardness of steel increase, while the plasticity, toughness and weldability decrease.Compared with other steel, carbon steel is the earliest, low cost, wide range of properties, the largest consumption of steel.
At present, most carbon products are used in a very wide range of industries.We are familiar with the raw materials of graphite, such as molded graphite, high purity graphite, isostatic pressed graphite, etc.As far as the graphite industry is concerned, most are non-standard products.Generally speaking, the processing of graphite products is for specific drawings and products belong to the industry, the selection of graphite materials and specific graphite processing parts of the processing method.The use of graphite products is usually a small part of a large industry.For example, in the solar photovoltaic industry, the general graphite processing workpiece is used for single crystal or polycrystalline growth furnace, including graphite crucible, graphite heater, graphite base plate, side plate, etc., because single crystal and polycrystalline growth has strict requirements for crystal growth environment, the selection of graphite processing parts has strict standards.
The main type of graphite ore in China is squamous type, followed by cryptocrystalline type.Compact crystalline graphite is only found in Tokebula deposit in Xinjiang and has little industrial value.High quality graphite products due to its special structure, with high temperature resistance, thermal shock resistance, electrical conductivity, lubricity, chemical stability and plastic characteristics.
In the development of military industry and modern industry, in the development of high and new technology, they are always indispensable strategic resources.Graphite products, such as graphite rings and graphite boats, have a wide range of applications.International experts predict that the 21st century of the 20th century will be the century of carbon.