Synthetic graphite/electrode graphite
Synthetic graphite is not only produced to make graphite electrodes for the steel industry, but also in the graphitisation of certain low-ash types of coke.
The raw materials are calcined petroleum coke and needle coke. The content of sulphur, nitrogen and volatile components is minimised in graphitisation furnaces at high temperatures of 2400-3000°C.
This creates graphite with its unique hexagonal and crystalline layered structure.
We sell our synthetic graphites worldwide under the RANCO name. They are perfect as carburising agents for grey cast iron (EN-GJL), nodular cast iron (EN-GJS) and cast steel (EN-GS) and are used to adjust to the correct carbon content in the liquid iron.
There are various types of carburising agents, which differ in quality, shape and grain size.
The solubility of the carbon depends on the relationship between the degree of saturation of the melt, temperature and time. Other influencing factors include the furnace size, bath movement, proportion of slag in the melt and sulphur content.
Advantages of RANCO® Products
Advantages of our synthetic graphite:
- A high degree of purity of at least 99% carbon and the particle morphology guarantee efficient dissolution in the melt.
- Low levels of sulphur and nitrogen
- Positive effect on the germ balance in the formation of nodular graphite (EN-GJS) and support of the inoculating effect against chilling.
- Grain sizes individually adapted to the size of the melting unit
The optimum grain size depends on the melt aggregate and the time of addition to the melt. Standard grain sizes are 0.2-1 mm, 0.2-4 mm, 1-4 mm, 3-8 mm and pellets.