2022-11-19
2023-08-14Various metallurgical furnace carbon blocks (such as blast furnace carbon blocks, ferroalloy furnace carbon blocks, calcium carbide furnace carbon blocks, and aluminum electrolysis cell cathode carbon blocks, etc.) are used at a certain high temperature. Therefore, carbon blocks should have high mechanical strength, thermal stability, and corrosion resistance, but the ash content requirements are not too strict. Except for the bottom carbon blocks used in aluminum electrolysis cells, it is not necessary to measure conductivity. The production of carbon blocks mostly uses anthracite as the aggregate and metallurgical coke as the filling material. To improve the thermal conductivity and corrosion resistance of carbon blocks, a certain amount of graphite fragments (or natural graphite) can be added. In order to improve the thermal conductivity and conductivity of carbon blocks, semi graphite carbon blocks can be produced by electrocalcining anthracite.The raw materials used for conductiv
2023-08-10(1) Raw materials. The raw materials used in the production of electrochar products include carbon and graphite powder, metal powder, and binder.(2) Calcination. The calcination of petroleum coke used in the production of electric carbon products generally adopts electric calcination.(3) Ingredients. According to the performance requirements of electric carbon products, 4-5 solid powders are used as ingredients.(4) Material mixing. Mixing mainly uses dry mixer, dual axis stirring knife mixer, pressure mixer, and continuous mixer.(5) Rolling sheet. The paste prepared with coal tar pitch as the binder needs to be processed by rolling to ensure the uniformity of the mixing of various materials.(6) Grinding powder. Grind the kneaded material and rolled sheet material to obtain pressed powder.(7) Pressing. The forming of electric carbon product blanks is generally done by molding, and the forming equipment includes hydraulic presses and mechanical presses.(8) Heat treatment. Heat treatment
2023-08-10On July 22nd, a South Korean research team published a paper on the preprint website arXiv, claiming to have synthesized the world's first room temperature and atmospheric pressure superconductor, named LK-99.Superconductivity refers to superconductivity. Under normal temperature and pressure, almost all conductors have resistance, resulting in thermal energy loss during current conduction. Superconductors are materials that can conduct current with zero loss due to the disappearance of resistance, and have complete diamagnetism (internal magnetic induction strength is zero), with advantages such as stability, low loss, and fast transmission.Previously, superconducting materials needed to enter the superconducting state at lower temperatures. The keyword "room temperature superconductivity" mentioned by the Korean team in this paper refers to the phenomenon of superconductivity achieved under room temperature conditions. According to the standards of condensed matter physics
2023-08-10On July 22nd, a South Korean research team published a paper on the preprint website arXiv, claiming to have synthesized the world's first room temperature and atmospheric pressure superconductor, named LK-99.Superconductivity refers to superconductivity. Under normal temperature and pressure, almost all conductors have resistance, resulting in thermal energy loss during current conduction. Superconductors are materials that can conduct current with zero loss due to the disappearance of resistance, and have complete diamagnetism (internal magnetic induction strength is zero), with advantages such as stability, low loss, and fast transmission.Previously, superconducting materials needed to enter the superconducting state at lower temperatures. The keyword "room temperature superconductivity" mentioned by the Korean team in this paper refers to the phenomenon of superconductivity achieved under room temperature conditions. According to the standards of condensed matter physics
2023-08-09Mechanical carbon graphite products are carbon graphite materials used as structural components in various machinery, including various graphite bearings, graphite sealing rings, graphite piston rings, graphite sliding plates, and graphite brake friction plates.According to different production processes, mechanical carbon graphite products are mainly divided into 7 categories: (1) carbon graphite; (2) Electrochemical graphite; (3) Resin impregnated carbon and electrochemical graphite; (4) Carbon and electrical graphite impregnated with metal; (5) Carbon graphite material with resin as binder; (6) Metal - graphite material; (7) Flexible graphite material.Mechanical carbon graphite products can work in corrosive media within the temperature range of -200~2000 ℃ and operate normally without lubricating oil at high motion rates. They have self-lubrication, good wear reduction performance, high thermal conductivity and heat shock resistance, low linear expansion coefficient, and good mech
2023-08-09Electric carbon products, also known as electrical carbon products, involve carbon graphite materials used in the power and electronic industries, including carbon brushes for electric motors, electric locomotive pantograph sliders, and other carbon graphite products used in the electronic industry.(1) Brushes for motors. Electric carbon products mainly use electric brushes. A brush is a sliding contact body that carries conductive current through the motor commutator or collector ring. Brushes can be divided into soft brushes, medium hard brushes, and hard brushes based on their material hardness; According to the purpose of the brushes, they can be divided into steam turbine generator brushes, steel rolling motor brushes, traction motor brushes, automotive and tractor brushes, electric tool brushes, aircraft brushes, and aerospace motor brushes; According to the color of the brushes, they can be divided into black brushes and colored brushes; According to the composition of raw mate
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