Determination of real density of graphite electrode

By:Yvonne Aug 10, 2020
density of graphite electrode
The true density of graphite electrode specimen is the mass per unit volume of specimen without porosity.
The true density of graphite electrode can be determined by X-ray diffraction method and density bottle method. The former is generally used in scientific research, while the latter is widely used in production testing, and is also applicable to the determination of true density of carbon raw materials.
Method will dry graphite electrode sample pieces below 0.15 mm, according to 3 g, in the density of 25 mL bottle, add 15 mL distilled water, on the sand bath (or electric heating board) boil 5 min sample of pore gas, remove the density bottle cooling to room temperature, adding boiling and cooling to room temperature in advance of distilled water to the density bottle scribed line, the density bottle in 20 ℃ + 1 ℃ water bath for 20 min, density bottles of liquid level should be below the water bath liquid level, the last adjustment to the scribed line, take out the density bottle, with a dry towel dry the bottle water, quickly weighed in the balance. The true density is calculated by the following formula:
Dw/dt = m (m + m1, m2)
Where dt is the true density, g/cm3; M is sample quality, g; M1 is the mass of water added to the density bottle, g; M2 is the mass of the density bottle with water and sample, g; Dw is the density of water at 20℃, g/cm3.
In addition to water, as the infiltrating medium there are ethanol, butanol benzene, kerosene, etc., these media is better than water infiltration, the measurement accuracy is slightly higher, but volatile and combustion. In addition, vacuum method can also be used to remove the gas in the sample hole, under the condition of maintaining a certain vacuum degree, the true density can be determined (see the determination of the apparent porosity of the carbon block for vacuum exhaust method).
►Graphite electrode features: Graphite electrode density
Graphite electrode features: Graphite electrode density
  • Graphite electrode prices rose sharply th

    Graphite electrode prices rose sharply th

    This week the price of graphite electrode increased, HP graphite electrode price rose to 2800 USD/ton. UHP 700mm price increased to $4460 / ton.... ...Read More>>

    2021-03-18
  • 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 market

    Graphite electrode market

    Currently, graphite electrode price is around 2000~3000 USD/ton, which is at the normal market price level. Some specifications may be out of stock and the price will rise slightly. However, the delivery time has been arranged after March 20... ...Read More>>

    2021-01-28