How Are UHP Graphite Electrodes Made?
Ultra-High Power (UHP) graphite electrodes play a critical role in the steelmaking industry, particularly in electric arc furnaces (EAF) where they are used to melt scrap metal. The manufacturing process of UHP graphite electrodes is complex and involves several stages to ensure their high quality and efficiency. The Manufacturing Process Raw Material Selection: The process begins with the selection of high-quality raw materials. Needle coke, derived from either petroleum or coal tar, is the primary raw material used due to its superior properties in producing high-density and high-strength electrodes. Mixing and Forming: The needle coke is crushed and mixed with a binder, typically coal tar pitch, to create a uniform mixture. This mixture is then shaped into the desired electrode form using an extrusion process. Baking: The formed electrodes are baked at around 800-1000°C in a baking furnace. This step carbonizes the binder and solidifies the structure of the electrodes, enhanci