The problem of slag drop of graphite electrode for electrolysis


We know that graphite has many advantages compared with […]

We know that graphite has many advantages compared with copper, such as processing speed, high-speed grinding speed is 3 times faster than copper, high-speed grinding and polishing speed is 5 times faster than copper, good machinability, complex geometric modeling, light weight, Less than 1/4 of the copper, the electrode is easy to maintain; it can reduce the number of single electrodes, and can be bundled in a combined electrode, and finally has good thermal stability, no deformation, no processing burrs and other advantages.

Graphite has so many high-quality properties, but is the problem of slag falling during electrolysis a drawback of graphite?

In fact, electrolytic graphite requires the use of high-purity graphite materials. Slagging is caused by graphite impurities containing a large amount of binder. The adhesive reacts with the solution and loses the role of the adhesive. In addition, some graphite rods produced are very soft because of insufficient pressure in the process.



When the adhesive changes when it encounters the dissolving liquid, the very soft graphite rod will of course drop off or melt in the dissolving liquid. However, graphite has the characteristics of acid and alkali resistance, and will not lose slag and dissolve in the solution for a long time. Therefore, it is necessary to use high-purity graphite electrode rods, high-purity graphite electrode rods, after repeated high-temperature roasting and immersion, 2000 ℃ long-term high-temperature roasting, so that part of the binder is completely volatilized, so as to achieve the purpose of high-purity graphite, greatly improving The properties of graphite. When the graphite contains other substances, it will cause the reduction and decrease of graphite performance, so that the graphite electrode rod containing the binder is dispersed in the solution, so the slag drop is very normal.