Graphite electrode types, graphite electrode voltage and wear

By:Yvonne Nov 16, 2020
Graphite electrode types, graphite electrode voltage and wear
General graphite electrode types are RP, HP, UHP, But IP and SHP exist between. Sort by power: RP<IP<HP<SHP<UHP.

Graphite electrode types

graphite electrodes
Graphite Electrode is composed of body and nipple
1) RP Graphite electrodes
RP graphite electrode is mainly used for regular power electric arc furnaces to smelt scrap steel, silicon and yellow phosphorus. RP graphite electrodes, referred to moulded columns of graphite, are used as the high temperature conductive material for electric arc furnaces.
2) IP Graphite electrodes
IP graphite electrode or HD graphite electrode belong to impregnated graphite electrode. The impregnating agent (asphalt)  immersed into the electrode pores to remove the pores. increase the bulk density and mechanical strength of the electrode.
3) HP Graphite electrodes
HP graphite electrode is mainly used for high power electric arc furnaces with the current density range of 18–25 A/cm2. HP graphite electrode is the conducting element for electric arc furnaces steelmaking. It is made of petroleum coke, needle coke, coal pitch and produced by a series of strict production processes.
4) SHP Graphite electrodes
The graphite electrode with grade of Super High Power(SHP for short) is produced and specified with allowable current density less than 18~25A/cm2. SHP electrode is widely used in electric furnace with super high power for steel melting.
5) UHP graphite electrode is used for the recycling of steel in the electric arc furnace industry. Its main ingredient is high-value needle coke which is made from either petroleum or coal tar.
Graphite electrode types

Graphite electrode voltage

The voltage between electrodes of the arc furnace is 100~600V. The electrode pressure drop is about 40 v, and the arc pressure drop is about 12V/cm. The longer the arc, the greater the pressure drop. The length of the arc is almost proportional to the voltage. During the melting period, the voltage of the electric arc furnace changes , and the max voltage and the min voltage may differ by 2 to 5 times.

Graphite electrode wear

Graphite is a very easy to cut material, but because the graphite material used as an EDM electrode must have enough strength.
Otherwise it will damaged during operation and EDM processing. As a result, the graphite workpiece is easy to break and the tool is easy to wear during the processing.
For graphite special tools, ordinary TiAlN coating can be selected with relatively better toughness. The cobalt content is slightly higher. For diamond-coated graphite tools, the hardness is relatively better. The cobalt content is slightly lower.
Choosing a proper geometric angle for graphite tools helps reduce the vibration of the tool. Conversely, graphite workpieces are not easy to chip.
  • Graphite electrodes china 2021

    Graphite electrodes china 2021

    According to customs data, from January to December in 2020, China exported 306,000 tons of graphite electrodes, 13.8% less than the same period last year. The total amount of graphite electrode export was USD742.977 million, which was USD140718.3 million less than last year.... ...Read More>>

    2021-03-04
  • HD graphite electrodes

    HD graphite electrodes

    HD graphite electrodes means High Density graphite electrodes, Its power is between RP and HP, and its physical and chemical indexes are also between them.... ...Read More>>

    2021-02-24
  • Graphite electrode supplier

    Graphite electrode supplier

    Graphite electrode suppliers in addition to the factory, there are many agents. Agency company to provide global procurement services to steel mills.... ...Read More>>

    2021-02-19
  • Graphite electrode stocks

    Graphite electrode stocks

    Showa Denko, GrafTech, Dan Carbon and Fangda are the top manufacturers in the graphite electrode industry by revenue, accounting for 18.94%, 17.51%, 7.6% and 12.69%, respectively, in 2019.... ...Read More>>

    2021-02-18
  • Graphite electrode importer

    Graphite electrode importer

    The main importing countries of graphite electrodes are Malaysia, Russia, Turkey, Azerbaijan, South Korea and the United States. Graphite electrode market Chinas total export of graphite electrodes in 2020 will be about 340,000 tons. It is m... ...Read More>>

    2021-01-08
  • Electric arc furnace graphite electrodes

    Electric arc furnace graphite electrodes

    Electric arc furnace graphite electrodes are conductive material in electric arc furnace (EAF) steelmaking, as the melting point of graphite is around 3900℃, and scrap steel is 1700℃, while the temperature in EAF is above 3000℃.... ...Read More>>

    2020-12-24