Graphite Electrodes Uses
Graphite electrodes are used in electrolysis processes and arc welding. They are hard-wearing and durable. Graphite is a good conductor. It is also cheap. Therefore, graphite electrodes are widely used in electric arc furnace (EAF).
The demand for graphite electrodes started gaining momentum in 2016, with increased EAF steel production. This is expected to drive the market during the forecast period. In addition, the domestic demand for non-ferrous alloys is expected to grow. As such, the domestic market for graphite electrodes is projected to remain strong in the future.
Several raw materials are used in the production of graphite electrodes. The most important raw material is petroleum coke. Other sources include needle coke and coal pitch. Petroleum coke has a sulfur content of 0.5%.
Graphite electrodes are generally produced in two ways. First, they are made by mixing natural graphite with a PVdF-binder. Secondly, they are made by modifying graphite with 2,6-dichlorophenolindophenol.
During the cycle, the original SEI is formed. Depending on the temperature, the speed of the SEI formation varies. When the SEI is thick enough, the peak temperature does not reach 140 degC.
In the case of regular power graphite electrodes, small amounts of asphalt coke are added. Graphite is a good heat conductor and can withstand high temperatures. Since it is a good conductor, it is used in electrolysis processes.
Graphite electrodes can be divided into two categories, namely, regular power and ultra-high power. Ultra-high power electrodes are the most popular type.
