One of the most common uses for graphite rods is in the electrolysis process. The structure of graphite makes it an ideal material as conductors. It is also a material that is a good choice due to low levels of thermal expansion, even with very high heat types of applications and processes.
The ability to transmit or conduct through the electrolysis process is an essential part of efficiency and effectively controlling all aspects of the process. Despite the importance of these electrodes, the graphite itself is low-cost to produce and manufacturer into the various extruded graphite rod sizes.
Manufacturing Uniform Rod Sizes
The extrusion process is ideal for the large scale manufacturing or graphite rod. All extruded graphite rod is made in the same way and based on industry standard rod sizes. The rod sizes include both a diameter and a standard length.
The actual rod is manufactured with a material that includes graphite powder and a binder. The binding agent is often pitch, but other materials can be used. The graphite powder and the pitch or binder is blended and then pushed through a die under pressure. The pressure compacts the graphite powder and the binder to hold the round shape that corresponds to the die diameter.
Next, the extruded graphite rod is fired at a specific temperature. This is usually 2000C, and there are several steps in the process to create the desired final product. While extruded graphite rod has a larger grain, it is very practical for use in any industrial electrolysis process.
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