uhp 700 graphite electrode
How much do you know about the production process of uhp 700 graphite electrode
The common method is to mix quartz sand and coke. The silica and petroleum coke are added with salt and wood chips. Due to the low natural content, the Datong uhp 700 graphite electrode is mostly artificial and placed in an electric furnace at 2000°C. After the high temperature and various chemical processes, the graphite electrode powder is obtained.
Uhp 700 graphite electrode (SiC) has become an important abrasive due to its great hardness, but its application range exceeds that of ordinary abrasives. For example, its high temperature resistance and thermal conductivity make it one of the kiln furniture materials for tunnel kilns or shuttle kilns, and its electrical conductivity makes it an important electric heating element.
To prepare SiC products, firstly, SiC smelting block [or: SiC pellets] must be prepared. Because it contains C and is super hard, SiC pellets were once called: emery. But be careful: it has a different composition from natural emery (also known as garnet). In industrial production, SiC smelting block usually uses quartz, petroleum coke, etc. as raw materials, auxiliary recovery materials, spent materials, and after grinding and other processes, they are blended into a charge with a reasonable ratio and a suitable particle size (in order to adjust the gas permeability of the charge, an appropriate amount needs to be added. When preparing the green uhp 700 graphite electrode, an appropriate amount of salt should be added to prepare the green uhp 700 graphite electrode at high temperature. The thermal equipment for preparing SiC smelting block at high temperature is a special graphite electrode electric furnace. Its structure consists of the furnace bottom, the end wall with uhp 700 graphite electrode inlaid on the inner surface, the detachable side wall, and the furnace core body (full name: energized heating element of the electric furnace). , Generally use graphite powder or petroleum coke to install on the charge according to a certain shape and size, generally round or rectangular.
Its two ends are connected with graphite electrode) and other components. The firing method used in the electric furnace is commonly known as: buried powder firing. It starts heating as soon as it is energized. The temperature of the furnace core is about 2500°C, or even higher (2600-2700°C). When the furnace charge reaches 1450°C, SiC is synthesized (but SiC is mainly formed at ≥1800°C) and releases co.
However, SiC will decompose when ≥2600℃, but the decomposed si will form SiC with C in the charge. Each electric furnace is equipped with a set of transformers, but only a single electric furnace is powered during production, so as to adjust the voltage according to the electrical load characteristics to basically maintain a constant power. The high-power electric furnace needs to be heated for about 24 hours. After a power failure, the reaction of generating SiC is basically over. After a period of cooling, the side wall can be removed, and then the charge can be taken out gradually. Disclaimer: The pictures of the article are all from the Internet. If there is any infringement, please contact the webmaster to delete it. Thank you!